Waveguide, Cavity, Or Concentric Line Resonator Patents (Class 330/56)
  • Patent number: 9509200
    Abstract: An HF generator has first and second solid-state switches. Each of the solid-state switches has first and second output connectors and is designed to switch a high-frequency electrical current between the first and second output connectors. Furthermore, the HF generator has a coaxial cable with first and second conductors. The first conductor successively has a first section and a second section in the longitudinal direction of the coaxial cable which are separated from one another by a first break point. The first output connector of the first solid-state switch is conductively connected to the second conductor, and the second output connector of the first solid-state switch is conductively connected to the first section. In addition, the first output connector of the second solid-state switch is conductively connected to the first section, and the second output connector of the second solid-state switch is conductively connected to the second section.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: November 29, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Oliver Heid, Timothy Hughes
  • Patent number: 8525588
    Abstract: Various apparatuses and methods for a vacuum electronic device are disclosed herein. In one embodiment, a vacuum electronic device includes a vacuum housing, an array of slow wave structures inside the vacuum housing sharing a common electron beam tunnel, an electron beam input port at a first end of the common electron beam tunnel, and an electron beam output port at a second end of the common electron beam tunnel.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 3, 2013
    Assignee: InnoSys, Inc.
    Inventors: Ruey-Jen Hwu, Laurence P. Sadwick, Jishi Ren
  • Patent number: 7782130
    Abstract: A resonant cavity with a bowtie shape supports an electromagnetic field used to deflect the trajectory of an electron beam passing through the cavity. The short transit time of the beam across the gap maintains the cavity fields at near-optimal phase, improving interaction efficiency even for relatively low-energy beams. High interaction impedance ensures good drive-power-to-deflection conversion efficiency. The uniform field achieved across the gap enforces uniform deflection across the beam profile to maintain beam quality. Multiple bowtie cavities can be arranged to allow arbitrary two-dimensional deflections.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: August 24, 2010
    Assignee: L-3 Communications Corporation
    Inventors: Mark Frederick Kirshner, Richard Donald Kowalczyk, Craig Bisset Wilsen
  • Patent number: 7724083
    Abstract: The disclosure generally relates to a method and apparatus for providing high-speed, low signal power amplification. In an exemplary embodiment, the disclosure relates to a method for providing a wideband amplification of a signal by forming a first transmission line in parallel with a second transmission line, each of the first transmission line and the second transmission line having a plurality of superconducting transmission elements, each transmission line having a transmission line delay; interposing a plurality of amplification stages between the first transmission line and the second transmission line, each amplification stage having an resonant circuit with a resonant circuit delay; and substantially matching the resonant circuit delay for at least one of the plurality of amplification stages with the transmission line delay of at least one of the superconducting transmission lines.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: May 25, 2010
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Quentin P. Herring, Donald Lynn Miller, John Xavier Przybysz
  • Patent number: 7532073
    Abstract: A solid state power amplifier (SSPA) system may include a radio frequency (RF) input, an RF waveguide split block, multiple monolithic microwave integrated circuit (MMIC) power amplifier modules, and/or a heat spreader. An MMIC power amplifier module may include a backing, a board, at least one MMIC, and/or a cover. A method for dissipating heat within an SSPA may include receiving an RF signal, splitting the RF signal, amplifying multiple RF signals, combining the multiple RF signals, generating heat, and/or dissipating heat.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: May 12, 2009
    Assignee: Viasat, Inc.
    Inventor: Noel A. Lopez
  • Publication number: 20090108930
    Abstract: An amplifier system includes a power divider for dividing an input RF signal into M RF signals of equal power and phase. The system has M low power selectable phase shifters each for phase shifting one of the M RF signals. M high power amplifiers are coupled to respective ones of the phase shifters. The system includes an M×N power distribution network having M input ports and N output ports, such as a Butler matrix. The M high power amplifiers are connected to a respective one of the M input ports of the distribution network. The phase of the M phase shifters may be adjusted to obtain a maximum output at the desired output with all the other outputs nulled.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Chetan Gandhi, Stan W. Livingston, Reinhardt W. Krueger
  • Patent number: 7482894
    Abstract: A radial power divider-combiner is disclosed. Such a radial divider-combiner may include a plurality of waveguides, each of which extends between a central monopole antenna and a respective peripheral monopole antenna. Such a waveguide may have a central portion with a height-to-width ratio of two, and a peripheral portion having an aspect ratio of one. To improve impedance-matching, a transformer portion may be disposed between the central portion and the peripheral portion. Such a transformer portion may have any number of sections, from one to infinity, with each section having a respective height between that of the central portion and that of the peripheral portion. In the extreme case, where the number of “sections” is infinite, the height of the transformer portion may vary linearly from that of the central portion and that of the peripheral portion.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: January 27, 2009
    Assignee: L-3 Communications Corporation
    Inventors: You-Sun Wu, Mark Francis Smith, James Norman Remer
  • Patent number: 7312673
    Abstract: A radial power divider-combiner is disclosed. The divider-combiner includes a divider and a combiner. An input signal is provided to a transmission antenna that radiates the input signal inside the divider. Within the divider, the input signal is divided into a plurality of individual signals. The individual signals are received by receiving antennas and provided to respective amplifiers. The amplifiers amplify the respective individual signals by a desired amplification factor. The amplified individual signals are provided to a plurality of transmitting antennas within the combiner. Inside the combiner, the amplified individual signals are combined to form an output signal that is received by a receiving antenna in the combiner.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: December 25, 2007
    Assignee: L-3 Communications Corporation
    Inventors: You-Sun Wu, Mark Francis Smith, James Norman Remer
  • Patent number: 7113056
    Abstract: A radial power divider-combiner is disclosed. The divider-combiner includes a divider and a combiner. An input signal is provided to a transmission antenna that radiates the input signal inside the divider. Within the divider, the input signal is divided into a plurality of individual signals. The individual signals are received by receiving antennas and provided to respective amplifiers. The amplifiers amplify the respective individual signals by a desired amplification factor. The amplified individual signals are provided to a plurality of transmitting antennas within the combiner. Inside the combiner, the amplified individual signals are combined to form an output signal that is received by a receiving antenna in the combiner.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: September 26, 2006
    Assignee: L-3 Communications Corporation
    Inventors: You-Sun Wu, Mark Francis Smith, James Norman Remer
  • Patent number: 6982613
    Abstract: A radial power divider-combiner is disclosed. The divider-combiner includes a divider and a combiner. An input signal is provided to a transmission antenna that radiates the input signal inside the divider. Within the divider, the input signal is divided into a plurality of individual signals. The individual signals are received by receiving antennas and provided to respective amplifiers. The amplifiers amplify the respective individual signals by a desired amplification factor. The amplified individual signals are provided to a plurality of transmitting antennas within the combiner. Inside the combiner, the amplified individual signals are combined to form an output signal that is received by a receiving antenna in the combiner.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: January 3, 2006
    Assignee: L-3 Communications Corporation
    Inventors: You-Sun Wu, Mark Francis Smith, James Norman Remer
  • Patent number: 6611719
    Abstract: A given high frequency electric power introduced into a cavity resonator is resonated in the long direction of the cavity resonator on an excited mode with a constant electric field intensity along the long direction of the cavity resonator. Then, a human body is set on a table 2 in the cavity resonator so that its body axis can match the long direction of the cavity resonator. Then, the resonated high frequency electric power is applied to the human body.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: August 26, 2003
    Assignee: Niigta University
    Inventor: Yoshiaki Saito
  • Patent number: 6414551
    Abstract: A high frequency amplifier with the multi-space structure, amplifying various frequencies by a Gunn diode in the multi-space structure, composed of non-radiative dielectric waveguides of various different sizes. An amplifier circuit includes a Gunn diode inserted in a space between two metal plates of a certain distance from each other, a circulator which revolves input waves and determines transmission direction, a first non-radiative dielectric waveguide, which is connected to the circulator, sending the input waves from the input terminal to the circulator, a second non-radiative dielectric waveguide, which is connected to the circulator, sending the input signals from the circulator to the Gunn diode and sends the amplified signals from the Gunn diode back to the circulator; and a third non-radiative dielectric waveguide, which is connected to the circulator, sending the amplified signals, which come into the circulator through the second non-radiative dielectric waveguide, to the output terminal.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: July 2, 2002
    Assignees: Sensing Tech Corp.
    Inventor: Cheon Woo Shin
  • Publication number: 20020039046
    Abstract: A waveguide for amplifying electromagnetic radiation of a characteristic wavelength includes a first reflector, a second reflector, and a gain medium having a characteristic wavelength of emission disposed between the first and second reflectors. The first and second reflectors are spaced apart from each other to form a microcavity which is off-resonance with respect to the characteristic wavelength of light emitted by the excited gain medium.
    Type: Application
    Filed: May 22, 2001
    Publication date: April 4, 2002
    Inventors: Michal Lipson, Lionel C. Kimerling
  • Patent number: 5698986
    Abstract: A cylindrical microwave cavity 12 has a pinched center 28, 30. Two apertures 28, 30, one in the center. of each face of the cylinder 10, provide access for a gas/powder mixture 124 having a dielectric coefficient depending on its density or some other measurement of interest. The faces 20, 22 of the cylinder 10 are much farther apart at the unpinched periphery, which comprises most of the volume of the cavity. The wider spacing allows an antenna 34 to be placed in the cavity 12, and provides a high Q-factor to maximize the sensitivity of the cavity 12. At the same time, certain resonance modes are greatly affected by a change in the dielectric coefficient of the gas/powder mixture 124 in the pinched portion 28, 30. The density of the powder or any other convenient variable may thus be servoed to any desired value. The powder 124 may be blown through the cavity 10, encased in tube 120 affixed to the cavity 12.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: December 16, 1997
    Assignee: Allen-Bradley Company, Inc.
    Inventors: David L. Mays, Ira B. Goldberg
  • Patent number: 5497050
    Abstract: An active RF cavity is defined by a conductive wall in which a plurality of solid state power amplifiers are mounted. The solid state power amplifiers induce an RF current at an inner surface of the wall to form an oscillating electromagnetic (EM) field within the cavity. Preferably, the power amplifiers are in the form of modules that contain a number of RF power chips. The structure operates as both a power combiner and a matching transformer and is powered by a relatively low voltage d.c. source. A high-amplitude field is generated using equipment that is more efficient and much lighter in weight than conventional equipment. Such a cavity may be applied in a drift tube linac, an RF quadrupole linac, a linac having aligned cavities, and in other types of particle accelerators, and as a high power RF amplifier with the EM waves piped out via a waveguide or a coaxial cable.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: March 5, 1996
    Assignee: Polytechnic University
    Inventor: Bernard R. Cheo
  • Patent number: 5471164
    Abstract: There is disclosed a system for linearizing an RF amplifier by the application of suitable load impedances to its 2nd, 3rd, and higher order output signals, thereby reducing output distortion products and improving performance. Intermodulation Distortion (IMD) reduction results from controlled termination of harmonic tuned filters produced by impedance selection and/or filter detuning. Preferably the apparatus comprises parallel band-pass filters including a filter passing the fundamental signals only; a filter passing 2nd harmonics; and a filter passing the 3rd harmonics. These, and optionally higher order filters, are employed for suppressing harmonic frequencies and reducing IMD. Preferably all filters have sufficient isolation to prevent serious interaction between filters. Therefore a selected mismatch provided at each of the harmonic output ports linearizes the amplifier's output.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: November 28, 1995
    Inventor: James R. Penny
  • Patent number: 5389890
    Abstract: Directional couplers 7.sup.1 -7.sup.20 are used to couple power from r.f. power amplifier modules 5.sup.1 -5.sup.20 to a transmission line 6 or other type of resonator, from which it is withdrawn by directional coupler 8. The power withdrawn from the continuous transmission line, which is an integral number of wavelengths at the operating frequency of the modules in length, is less than the power circulating around the transmission line 6. The balance load may be removed to enable the output load to be combined with the output of another r.f. power amplifier operating a different frequency so that e.g. sound and vision signals can be combined at an aerial and, in the latter case, means may be provided for improving the resonance of the main loop 6.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: February 14, 1995
    Assignee: GEC-Marconi Limited
    Inventor: Clement P. Burrage
  • Patent number: 5339043
    Abstract: The wave propagation signal transmission device according to the invention comprises two coupled distributed-constant wave propagation lines. The lines include active members of amplifying signals in transit in the form of linear and continuous components in parallel relationship. In particular, a cathode 318, and control grid 320, decoupling/accelerating screen grids 324, 326, receive, at E, HF signals to be amplified, and an anode 322 delivers, at S, amplified signals. Possible uses of the device according to the invention are high power and very wide band HF amplification and the generation of electromagnetic pulses very steep rise front and of long duration.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: August 16, 1994
    Assignee: Prana Recherche et Development
    Inventor: Jacques Chahbazian
  • Patent number: 5159290
    Abstract: Apparatus is disclosed in which a ring of microwave amplifiers are spaced around the top of a cavity closure structure containing upper and lower splitter and combiner cavities. The inputs and outputs of the amplifiers are connected by, respectively, input and output coaxial couplers to points in, respectively, the splitter and combiner cavities which are spaced radially outward of, and equiangularly around the centers of these cavities. In operation, input microwaves are distributed by the splitter cavity and input couplers to the amplifiers to be amplified by them in parallel, and the several microwave outputs of the amplifies are merged together by the output couplers and combiner cavity to provide a single amplified output. On the upper and lower sides of the splitter and combiner cavities are rigid metal plates with flat surfaces facing towards these cavities, and on the lower and upper sides of the splitter and combiner cavities are sheet metal dishes.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: October 27, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Paul L. Bartley, Robert E. Myer
  • Patent number: 4918031
    Abstract: Anisotropic plasma etching is accomplished utilizing a helical resonator operated at relatively low gas pressure. The use of this combination yields an extremely high flux of ionic species with resulting rapid anisotropic etching. A helical resonator in conjunction with suitable precursors is also quite useful for plasma induced deposition.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: April 17, 1990
    Assignee: American Telephone and Telegraph Company,AT&T Bell Laboratories
    Inventors: Daniel L. Flamm, Dale E. Ibbotson, Wayne L. Johnson
  • Patent number: 4868889
    Abstract: The nonlinearity of the frequency response of a solid state power amplifier (SSPA) is obviated by effectively operating the SSPA at the 1 dB compression point, where the nonlinearity does not exist, and controllably reducing, downstream of the SSPA, the power output produced by the SSPA to the level required by the link. In particular, the output is reduced by controllably inserting a relatively thin tapered blade of ferrite material into a waveguide coupling section downstream of the SSPA. Preferably the ferrite material is comprised of a robust carbonyl steel of sufficient thickness to withstand the heat induced in the course of its absorbing microwave energy at the SSPA output, while being of a narrow or thin configuration and oriented for insertion into the absorbing section of waveguide so as to not effectively alter the characteristics of the signal profile of the electromagnetic wave.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: September 19, 1989
    Assignees: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: William E. McGann, John R. Todd
  • Patent number: 4853650
    Abstract: A microwave power combiner having a spherical region from which six rectangular waveguides extend oppositely along mutually orthogonal diameters. The long dimension of each waveguide cross section extends along a diagonal of a cube circumscribing the region and extends orthognally to this long dimension of the opposite waveguide. One waveguide is an input for an injection locking signal, and four waveguides are inputs for power to be combined in the region from oscillators controlled by the signal. No circulator is required, and the combined power may be output through the remaining waveguide or through the injection locking input waveguide. A number of the combiners may be connected with the output of one combiner serving as an injection locking input or as one power input to another of the combiners.
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: August 1, 1989
    Assignee: The United States of America as represented by The Secretary of the Navy
    Inventors: Donald R. Bowling, Charles F. Smith
  • Patent number: 4780685
    Abstract: A power combiner includes an input power splitter driving a plurality (N) of amplifiers. The amplifier outputs have Z.sub.0 output impedance and are coupled by transmission (TX) lines of Z.sub.0 characteristic impedance to the junction point of a lossless power combiner. Short-circuiting switches located .lambda./4 from the junction power disconnect failed amplifiers from the combiner. According to the invention, a number M<N of the shorting switches are open during normal operation, so the impedance presented by the parallel TX lines at the junction of the combiner is Z.sub.0 /M. An impedance transformer associated with the combiner transforms the junction point impedance Z.sub.0 /M to Z.sub.0 at the combined output port, for example, by a .lambda./4 line having an impedance .sqroot.Z.sub.o.sup.2 /M.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: October 25, 1988
    Assignee: General Electric Company
    Inventor: Donald A. Ferguson
  • Patent number: 4737738
    Abstract: A resonant cavity arranged for an electron beam to pass therethrough, is made of two spaced apart parallel substantially planar members movable with respect to each other in a direction perpendicular to their major surfaces, at least one of said members having a delay line structure on its inner face within the gap between said two members. Means are arranged for moving the members relative to each other so as to vary the spacing between said members, whereby the oscillation frequency is tuned easily. The resonant cavity can be used to realize wide-band extended interaction oscillators and klystron amplifiers.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: April 12, 1988
    Assignee: Agence Spatiale Europeenne
    Inventor: Dudley Perring
  • Patent number: 4716382
    Abstract: A microwave amplifying apparatus includes a waveguide which is shorted at one end and supplied with a TM mode or a TE mode signal, a pickup probe mounted on the waveguide for converting the signal into a TEM mode signal, and microstrip lines and field effect transistors, or amplifier elements, for amplifying the TEM mode signal. A matching device is arranged on the shorted waveguide adjacent to an incidence side with respect to the pickup probe while an input terminal of the first-stage amplifier element is directly interconnected to an output terminal of the pickup probe. The device is, therefore, free from a signal loss otherwise developed between the pickup probe and the initial-stage amplifier element. The matching device consists of three conductive rods which are spaced a quarter-wavelength distance from each other, and three lock nuts for fixing the conductive rods.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: December 29, 1987
    Assignee: Yokowo Mfg. Co., Ltd.
    Inventors: Wasuke Yanagisawa, Kenichi Muramatsu
  • Patent number: 4707668
    Abstract: Improved apparatus and method are provided for the coherent amplification and injection of radio-frequency (rf) energy into a load cavity using a plurality of amplifier tubes. A plurality of strip line cavities (30, 32, 34, 36, 40, 42, 44) are laterally joined to define a continuous closed cavity (48), with an amplifier tube (50, 52, 54, 56, 58, 60, 62, 64) mounted within each resonant strip cavity. Rf energy is injected into the continuous cavity (48) from a single input (70) for coherent coupling to all of the amplifier tubes for amplification and injection into the load cavity (76).
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: November 17, 1987
    Assignee: The United States of America as represented by the Department of Energy
    Inventor: William J. Hoffert
  • Patent number: 4700108
    Abstract: Apparatus and method for generating and controlling the electric field within the cavity of a particle beam accelerator. A power splitter divides a common drive signal into separate branches each driving separate RF amplifiers. The output of each amplifier is coupled, through a circulator, to a separate input launcher within the cavity. The high Q of the cavity causes the signal from each launcher to combine to form an undistorted field pattern within the cavity regardless of small amplitude and phase differences at each launcher. Total power control is maintained by changing the phase in one or more of the separate branches, or by chopping the power applied to the amplifiers in the controlled branches. To improve efficiency, the input launchers in branches which are turned off by the chopping technique may be shorted to ground during the turned off interval.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: October 13, 1987
    Assignee: Westinghouse Electric Corp.
    Inventor: Alfred W. Morse
  • Patent number: 4700145
    Abstract: Radially fed microwave signal combiner/distributor apparatus comprising a central coaxial connector which is coupled via radially extending paths to several circumferential coaxial connectors which are equiangularly disposed on the circumference of a circle surrounding the central connector, the apparatus including a generally discoidal microwave transmission cavity through which the paths extend, which cavity communicates at the center thereof with the central coaxial connector and which cavity communicates at the circumferential periphery thereof with the circumferential coaxial connectors via a conductive annulus, which annulus is spaced away from the internal circumferential periphery of the cavity, and to which annulus the inner conductors of the circumferential coaxial connectors are electrically connected at locations equiangularly spaced around the annulus.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: October 13, 1987
    Assignee: Plessey Overseas Limited
    Inventors: John Yelland, Alan Thompson
  • Patent number: 4683440
    Abstract: A high-frequency amplifier device according to this invention comprises a high-frequency amplifier portion, a high-frequency input portion which is formed of a waveguide and which can transmit polarized signals orthogonal to each other, two detector portions which are inserted in the waveguide of the input portion and which respectively and independently detect the polarized wave signals orthogonal to each other, an irreversible circuit to which the polarized wave signals detected by the detector portions are individually input and which selectively and switching delivers one of the polarized wave signals to the high-frequency amplifier portion and returns the other polarized wave signal to the input portion, and a switching control mechanism for switching and controlling transmitting directions of the irreversible circuit in response to a control signal externally applied.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: July 28, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yoshihiko Yoshikawa
  • Patent number: 4656438
    Abstract: A method and arrangement for enhancing the level of supplied microwave energy including a resonant ring capacitively coupled to a microwave coupling device effective for connecting to a microwave transmission line, the arrangement being mounted in a shield structure. Amplification is effected by IMPATT diodes capacitively coupled to the resonant ring. The microwave coupling device is variably setable with respect to the transfer structure, thereby promoting the establishment of impedance matching therebetween.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: April 7, 1987
    Assignee: United Technologies Corporation
    Inventor: Samuel Levinson
  • Patent number: 4623849
    Abstract: An IMPATT diode mounted in a double-tuned resonant cavity to exhibit stability by suppressing subharmonic frequencies is disclosed. A foreshortened quarter wavelength section is connected to the diode to form an equivalent parallel resonant circuit at one end thereof. At the other end of the quarter wavelength section is an odd-quarter wavelength tuning slug which provides a section which exhibits a second, series equivalent resonant circuit. To provide increased stability at subharmonic frequencies, a half-wavelength tuning slug is disposed adjacent to the odd-quarter wavelength section. The half wave tuning slug is virtually transparent at the operating frequency, but is a quarter-wavelength at the first subharmonic, and thus exhibits a high resistance at the subharmonic frequency.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: November 18, 1986
    Assignee: Cornell Research Foundation, Inc.
    Inventors: G. Conrad Dalman, Charles A. Lee
  • Patent number: 4619001
    Abstract: A tuning system employs a specific resonant circuit which includes two electrodes confronting each other through a dielectric interposed therebetween. Each of the two electrodes has at least one bent portion to present a lumped-constant inductance and has a desired equivalent electrical length. The two electrodes respectively have common terminals located out of mutually confronting positions so that voltage signals induced by mutual inductance between the electrodes will be opposite in phase so as to thereby produce a parasitic distributed-constant capacitance. The two electrodes form a two-terminal circuit network having a first terminal disposed at a desired position on one of the two electrodes and the common terminals as a second terminal. The first terminal of the resonant circuit is connected to a feedback amplifier, an amplifier, or a mixer so as to form a tuning oscillator, a tuning amplifier or a mixer.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: October 21, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Johji Kane
  • Patent number: 4571555
    Abstract: A plurality of negative resistance devices is spaced below a cylindrical center conductor of a single coaxial cavity. Each negative resistance device has a bias device connected to it by a bias wire. Extending radially through the outer wall of the coaxial cavity is a coax cable with an RF coupling probe. A tuning screw is place axially through the interior of the center conductor for tuning the frequency of the power combiner.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: February 18, 1986
    Assignee: Motorola, Inc.
    Inventors: Bernard E. Sigmon, Charles V. Evans
  • Patent number: 4517527
    Abstract: A waveguide amplifier circuit has two semiconductor amplifier elements in a first waveguide circuit, a second waveguide circuit which is perpendicular to the first waveguide circuit and a termination circuit arranged at an end, remote from the semiconductor amplifier elements, of the second waveguide circuit. An abnormal oscillation component between the two semiconductor amplifier elements is attenuated by the second waveguide circuit and the termination circuit, thereby obtaining a high power output.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: May 14, 1985
    Assignee: NEC Corporation
    Inventors: Shigenobu Aihara, Akio Yamada
  • Patent number: 4514700
    Abstract: The invention relates to an output amplifier for a transmitting tube, having an operating frequency located in the FM- and the VHF- frequency bands. In order to match the output impedance of the preamplifier to the input impedance of the output amplifier the output amplifier includes a broad-band impedance transformer. Mechanical and electrical flexibility is obtained by using an impedance transformer formed from series/parallel arrangements of coaxial cables. The impedance transformer needs little room and nevertheless provides a broadband impedance match.
    Type: Grant
    Filed: January 21, 1983
    Date of Patent: April 30, 1985
    Assignee: U.S. Philips Corporation
    Inventor: Harry Piepers
  • Patent number: 4494087
    Abstract: A distributed inductive reactance is coupled to a terminating impedance at the interface of a combiner probe with a resonant cavity. The distributed reactance is implemented by a metal insert having a cavity interface and having a coupling portion, which is coaxial with a cylindrical dielectric and with a cylindrical cavity in an end of the terminating impedance.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: January 15, 1985
    Assignee: Motorola, Inc.
    Inventors: Michael Dydyk, Norman K. Enlow, Joseph R. Tuzzolino
  • Patent number: 4471316
    Abstract: Disclosed is an electric oscillation generator comprising an exciter and an output amplifier stage utilizing a vacuum tube connected in a common-grid circuit. A section of the input circuit of the vacuum tube is connected to the output of the exciter. The exciter is made as a power supply through a compensating-voltage producing device connected in series with said section of the input circuit and having an output voltage opposite in phase to the voltage across said section of the input circuit of the vacuum tube.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: September 11, 1984
    Inventors: Matvei I. Pass, Nina S. Ogarkova, Jury K. Lesish, Lev I. Shapiro, Jury M. Lebedev, Oleg V. Filatov
  • Patent number: 4467472
    Abstract: A diplexer is disclosed for use in remotely fed intermediate regenerators or repeaters of broad-band transmission systems with coaxial cable sections. The diplexer has a high circulating attenuation at high frequencies. Since sections of the regenerator are at a remote feed potential and are connected to the inner conductor of the feed cable, a plurality of high-voltage stable feed-through capacitors as well as line inductors are required for decoupling the regenerator from noise voltages. In view of a lower expense and simpler structure, a diplexer is provided according to the invention which, at its carrier body, contains a tubular body with a material having a high dielectric constant and corresponding dielectric strength. The stripped feed cable is conducted through its free inside diameter, said tubular body being continuously metallized on the inside and by sections on the outside. It also contains ferrite rings at the outside at sections of the outer tubular body which are free of the metallization.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: August 21, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Wendt
  • Patent number: 4453139
    Abstract: A combiner for power combining electromagnetic energy is disclosed. At least two electromagnetic cavities are positioned having intercavity coupling among all cavities: each cavity is tangent to all other cavities and/or external transmission line connections are employed to enhance/provide intercavity coupling. Each cavity contains within it at least one power generating device. An input/output port is connected via a nonreciprocal device to an output load and an injecting oscillator which usually has a lower power level than that of the free-running combiner and a higher spectral purity. The cavities are intentionally tuned to at least two different frequencies. For the two cavity and three cavity embodiments, a greater bandwidth is obtained compared with prior art combiners where the cavities are tuned to the same frequency. The power loss is slight.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: June 5, 1984
    Assignee: Ford Aerospace & Communications Corporation
    Inventor: Frederik Labaar
  • Patent number: 4429286
    Abstract: A divider/combiner amplifier circuit divides input power through a sectored coaxial line to a plurality of longitudinal parallel channels spaced around the circumference of a cylinder; the power in each channel is amplified by a semiconductor device; and the amplified power is combined in another sectored coaxial line. A microwave waveguide connected to the input and output of each amplifying device confines the microwave energy of the operating mode to the longitudinal channel formed by said waveguide. Each waveguide extends longitudinally along the cylinder and each is circumferentially spaced from its neighboring waveguide by a space which forms a cut-off waveguide to the operating mode.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: January 31, 1984
    Assignee: Raytheon Company
    Inventors: Lawrence J. Nichols, George H. MacMaster
  • Patent number: 4424496
    Abstract: A divider/combiner amplifier circuit divides input power through a sectored coaxial line to a plurality of longitudinal parallel channels spaced around the circumference of a cylinder; the power in each channel is amplified by a semiconductor device; and the amplified power is combined in another sectored coaxial line. A microwave waveguide connected to the input and output of each amplifying device confines the microwave energy of the operating mode to the longitudinal channel formed by said waveguide. Each waveguide extends longitudinally along the cylinder and each is circumferentially spaced from its neighboring waveguide by a space which forms a cut-off waveguide to the operating mode.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: January 3, 1984
    Assignee: Raytheon Company
    Inventors: Lawrence J. Nichols, George H. MacMaster
  • Patent number: 4415867
    Abstract: A microstrip integrated circuit reflection amplifier utilizing packaged diodes and permitting some gain and bandwidth adjustment. A 3 db quadrature coupler has two of its ports connected to substantially identical reflection amplifiers. The reflection diodes are adjustably mounted in brackets perpendicular to the dielectric substrate of the microstrip network and may be moved in and out along the microstrip circuit to provide for some gain correction and bandwidth adjustment.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: November 15, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David Rubin
  • Patent number: 4363000
    Abstract: An RF tank circuit for a transmitter power amplifier stage including a half-wave length "folded" coaxial transmission line as an anode tuning device. The tank circuit has a grounded outer conductor and an ungrounded inner conductor, the latter to be operated at a high RF potential. The outer conductor is connected electrically to a third conductor which is adjustably extensible into the ungrounded inner conductor, hence, suggesting a folded effect for the outer conductor and the third conductor in combination. The third conductor has a bellows which can be expanded or contracted by drive means disposed exteriorly of the cavity, thereby to fine-tune the cavity to a selected frequency. The third conductor has mounting means which permit its extension into the inner conductor to be variable, thus allowing for coarse adjustment of the bandwidth, prior to the fine-tuning accomplished by suitable bellows-drive controls.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: December 7, 1982
    Assignee: Broadcast Electronics, Inc.
    Inventor: James A. Aurand
  • Patent number: 4355286
    Abstract: A resonant circuit arrangement for anode resonant circuits in radio frequency output amplifiers. A transmitter tube is formed with a cylindrical grid electrode and, coaxial therewith, a hollow cylindrical anode member encircling the grid electrode. A first circular metal disk extends perpendicularly from the grid electrode beyond the anode member. A second circular metal disk, with a smaller external diameter than the first, extends perpendicularly from the outer surface of the anode member. A hollow metal cylinder extends from the peripheral edge of the first circular metal disk past the second circular metal disk. A third circular metal disk extends from the hollow metal cylinder parallel with the first and second circular metal disks and on the side of the second disk opposite the first disk. A fourth circular metal disk is positioned between and parallel to the third and fourth disks.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: October 19, 1982
    Assignee: Herfurth GmbH
    Inventors: Karl-Heinz Knobbe, Hellmut Noldge
  • Patent number: 4334203
    Abstract: A device to suppress the generation of second harmonic frequencies in a power amplifier tank circuit such as may be used in a radio frequency transmitter. The present invention employs a device connected between the outer conductor (which is normally at ground potential) and the inner conductor. Specifically, the device utilizes a metal strap, such as a copper strap, which is connected to the inside surface of the outer conductor in an electrically conductive manner and which is also connected to a capacitor disk movably mounted with respect to the inner conductor. The capacitor disk is mounted to an insulating arm or rod and may be projected back and forth within the space between the outer and inner conductors, thereby adjusting the impedance of the device. By sliding the rod toward the inner conductor, the loop formed by the copper strap becomes more straightened thereby changing the inductance of the circuit.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: June 8, 1982
    Assignee: Broadcast Electronics, Inc.
    Inventor: James A. Aurand
  • Patent number: 4327330
    Abstract: A novel arrangement to achieve high power amplification of a microwave signal by summing the contributions of many small power amplifiers. This arrangement comprises the equivalent of a divider network to distribute an incoming signal to an arbitrary number of small power amplifiers, and a combiner to sum the outputs of all amplifiers into a single output. This arrangement combines the series-fed circuit concept with a dual mode transmission media (a transmission line capable of transmitting two independent orthogonal modes, for example, the circular waveguide TE.sub.11 mode) for the divider and combiner.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: April 27, 1982
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Joseph C. Ranghelli
  • Patent number: 4309672
    Abstract: A microwave oscillator/amplifier includes a plurality of TEM transmission lines each with a negative resistance device at one end and a lossy, matched termination at the other end. A resonant cavity is coupled to each TEM line so as to induce a parallel resonance on the lines at the region of coupling. Structural means are provided for maintaining the characteristic impedance of the TEM lines uniform along the length of said lines. Fabrication of a device in which the TEM line characteristic impedance was uniformly maintained along the line length at five times the optimum negative resistance of said negative resistance device is noted. Suggested levels of characteristic impedance are relatively low compared to prior art devices, none of which are known to attempt maintenance of characteristic impedance uniform along the length of the TEM transmission line.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: January 5, 1982
    Assignee: Ad-Tech Microwave, Inc.
    Inventor: Richard C. Havens
  • Patent number: 4283685
    Abstract: A multiple channel amplifier providing both gain and/or phase shift to a microwave signal is formed of a set of transmission lines connected in parallel by means of a power splitter at the input end and a power combiner at the output end of the set of transmission lines. The transmission lines are disposed in a cylindrical array of electrically conducting bars which support amplifying and/or phase shifting elements between the bars and withdraw heat from the amplifying and/or phase shifting elements. The transmission lines may be slotted or severed for directing power flow towards an output terminal of the amplifier. The amplifying and/or phase shifting elements are conveniently mounted on a set of heat sinks to form modules, each of which is readily inserted and detached from the cylindrical array.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: August 11, 1981
    Assignee: Raytheon Company
    Inventors: George H. MacMaster, Lawrence J. Nichols
  • Patent number: 4282491
    Abstract: A multiple channel amplifier providing both gain and/or phase shift to a microwave signal is formed of a set of transmission lines connected in parallel by means of a power splitter at the input end and a power combiner at the output end of the set of transmission lines. The transmission lines are disposed in a cylindrical array of electrically conducting bars which support amplifying and/or phase shifting elements between the bars and withdraw heat from the amplifying and/or phase shifting elements. The transmission lines may be slotted or severed for directing power flow towards an output terminal of the amplifier. The amplifying and/or phase shifting elements are conveniently mounted on a set of heat sinks to form modules, each of which is readily inserted and detached from the cylindrical array.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: August 4, 1981
    Assignee: Raytheon Company
    Inventors: George H. MacMaster, Lawrence J. Nichols
  • Patent number: 4270099
    Abstract: A circuit arrangement for generating and stably amplifying broadband rf signals. The circuit arrangement includes a first rectangular waveguide designed for operation in a frequency range below its cutoff frequency and a second rectangular waveguide for operation at the operating frequency. An active semiconductor element is disposed in the first rectangular waveguide and a direct voltage is supplied to the semiconductor element. At least one waveguide section is provided for connecting the first and second rectangular waveguides and has the same width as the second rectangular waveguide and a height less than the second rectangular waveguide. The waveguide section matches the cross section of the first rectangular waveguide to the cross section of the second rectangular waveguide.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: May 26, 1981
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Hardial S. Gill, Othmar Tegel