Tube Enclosed By Resonator Structure Patents (Class 331/97)
  • Patent number: 5714913
    Abstract: A discrete monotron oscillator for use in a high power microwave device is formed with a microwave oscillator having a half-wavelength resonant coaxial microwave cavity operating in fundamental TEM mode for microwave oscillation with an inner conductor defining a drift tube for propagating an electron beam and an outer conductor coaxial with the inner conductor. The inner conductor defines a modulating gap and an extraction gap downstream of the modulating gap. The modulating gap and the extraction gap connect the coaxial microwave cavity with the drift tube so that energy for the microwave oscillation is extracted from the electron beam at the extraction gap and modulates the electron beam at the modulating gap. For high power operation, an annular electron beam is used.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: February 3, 1998
    Assignee: The Regents of the University of California
    Inventors: Bruce E. Carlsten, William B. Haynes
  • Patent number: 5559477
    Abstract: Five CMOS inverters are connected in a series ring to form an oscillator. Current to the inverters is controlled to establish gate delays of the inverters and thereby determine a frequency of oscillation of the oscillator. The oscillator is included in a phase locked loop where the gate delay of the inverters is selected by selecting the value of a frequency divider of the phase locked loop. The selected delay is used to form a train of pulses with a desired duty cycle.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: September 24, 1996
    Assignee: International Microcircuits, Inc.
    Inventors: Orhan Tozun, Chit-Ah Mak, Werner Hoeft
  • Patent number: 5159618
    Abstract: A X-ray emissive vacuum tube is fully enclosed in an electrically conductive casing with electrical terminals through which bias potentials are applied to the tube. Occasionally an arc discharge occurs between electrodes within the tube generating a high frequency signal which ordinarily resonates with the conventional casings. However a resistive coating is applied to the inner surface of the case. That coating has a resistivity sufficient to lower the Q of the case to a value at which significant ringing does not result from the discharge.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: October 27, 1992
    Assignee: General Electric Company
    Inventor: James A. Blake
  • Patent number: 5045825
    Abstract: A broadband, varactor-tuned shorted coax resonator is provided with a single point coupling port that facilitates coupling of discrete circuitry to the distributed resonator. The coupling port is defined by adding a second shorted coax line across the end of the first. The outer conductors of the two lines are interconnected. The inner conductors of the two lines are serially coupled and define a coupling gap, either along their length or at their ends, across which discrete circuitry can be connected. In a preferred form of the invention, the discrete circuitry is positioned in a region within the periphery of one of the inner conductors in order to provide an electromagnetic shield for the circuitry.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: September 3, 1991
    Assignee: Hewlett-Packard Company
    Inventor: Barton L. McJunkin
  • Patent number: 4496913
    Abstract: A mm wavelength power combiner comprising an open resonator comprising a r of confronting concave reflectors which can be either spherical or parabolic. The resonator dimensions are many times the wavelength of the energy sources to be combined. A plurality of mm wave energy sources are applied to the resonator in such a way that the great majority of the energy bounces back and forth between the reflectors near the axis thereof in the fundamental or Gaussian mode. The design minimizes multimoding and diffraction losses.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: January 29, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Lothar Wandinger, Vahakn Nalbandian
  • Patent number: 4228539
    Abstract: The components of a transistor oscillator are mounted on an end cap rotatably mounted on the outer tube of a cavity resonator which stabilizes the oscillator. The intensity with which a high frequency is applied to the cavity resonator is adjustable by rotation of the end cap.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: October 14, 1980
    Assignee: Valsala Oy
    Inventor: Reijo Hamalainen
  • Patent number: 4211984
    Abstract: A high frequency industrial generator, especially suitable for supplying power to a device for heating an electric poorly conducting substance such as a fleece of a cellulose material, comprises two hollow concentrically disposed conductors each of square section and supporting respective electrode plates of an associated capacitor. All the plates are vertically disposed and lie at right angles to the walls of the respective conductors. In the middle of the electric plates there is situated a triode electron tube electrically connected to the plates to form an oscillating circuit. The anode potential and cooling water supply for the electron tube is located within a field free space inside the internal conductor. One set of electrode plates can be adjusted relative to the other to adjust the frequency and the arrangement ensures only low electrical losses are incurred.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: July 8, 1980
    Assignee: Bison-Werke, Bahre & Greten GmbH & Co. KG
    Inventors: Kurt Lamberts, Jurgen Leppin, Berndt Greten, Harry Neubauer
  • Patent number: 4174492
    Abstract: A device for attenuating electromagnetic cavity interference waves, which occur in the vacuum system of a high-frequency electron tube, in particular a transmitting tube, comprising a wave-guide portion coupled to the cavity of the electron tube, which may or may not form a part of the vacuum system of the electron tube, and which wave-guide portion may have a length corresponding approximately to a quarter wave length of the interference waves, and is provided with a high-ohmic resistive coating, the high resistance of which is transformed by the wave-guide portion into a low resistance with respect to the cavity interference waves which are to be attenuated, in the cavity of the electron tube.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: November 13, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventor: Johannes Holle
  • Patent number: 4132965
    Abstract: A device comprising a band-pass filter comprising two concentrically arranged coaxial resonator cavities and a coupling capacitor disposed between these resonator cavities, wherein the bandwidth of the filter can be changed by means of a replaceable dielectric body disposed between the plates since the device is separable in two individually associated parts.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: January 2, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Jozef J. M. Warringa, Harry Piepers
  • Patent number: 4054875
    Abstract: The present invention relates to microwave circuits for operating on microwave radiations. It consists in combining a dielectric resonator and a microwave diode in a hybrid or integrated circuit, in order to provide a circuit which will operate without any external elements other than a direct current supply for the transmitter and a local microwave radiation for the receiver.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: October 18, 1977
    Assignee: Thomson-CSF
    Inventor: Gerard Cachier
  • Patent number: 4039982
    Abstract: A tuning circuit having a coaxial cavity with a movable toroidal section to effect inductive tuning. The outer conductor is tapered to effect capacitive tuning by movement of the toroidal section axially within the cavity due to varying of the width of the annular space between the outer conductor and the toroidal section.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: August 2, 1977
    Assignee: Continental Electronics Manufacturing Company
    Inventor: James O. Weldon
  • Patent number: 4034320
    Abstract: An output coaxial cavity for high power electron tubes is described in which the output coupler is directly connected to an intermediate coaxial conductor of the coaxial cavity at a distance from the tube that is greater than one-quarter wavelength and less than one-half wavelength over the tuning range of the cavity. The intermediate coaxial conductor is spaced between and concentric with an inner conductor and an outer conductor of the coaxial cavity. A first shorting stub is positioned between the inner conductor and the intermediate conductor and a second shorting stub is coupled between the intermediate conductor and the outer conductor. The positions of the shorting stubs are arranged to resonate the cavity at the desired tuning frequency.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: July 5, 1977
    Assignee: RCA Corporation
    Inventors: LeRoy Francis Heckman, Jr., James Bruce Pickard