Patents Examined by Marvin Nussbaum
  • Precision microwave delay circuit and method
    Patent number: 4160220
    Abstract: A resistive material in the evanescent field of a transmission line, such as microstrip line, is employed to vernier adjust the phase delay introduced by the line. While the phase delay is being measured, the position of the resistive material, which is being held in place by cement which has not yet set, is altered, until the precise phase delay desired is reached, and then the cement is permitted to harden. The resistive material employed is of the type normally used as an absorber, such as Eccosorb, and its resonant frequency is a fraction of the signal frequency.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: July 3, 1979
    Assignee: RCA Corporation
    Inventor: Vitaly Stachejko
  • Waveguide expansion joint
    Patent number: 4158825
    Abstract: An expansion joint for connecting sections of waveguide includes a plurality of spacer discs mounted on a plurality of guide rods. The guide rods are rigidly affixed to a termination member. Washer type springs are employed between the individual spacer discs on the guide rods for controlling increases and decreases in the space between the discs and, hence, compensating for contraction and expansion, respectively, of the waveguide sections while maintaining a uniform electrical path through the joint. Additional spacer discs having various thicknesses are also employed to allow for a predetermined maximum initial length adjustment within a prescribed tolerance.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: June 19, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Robert P. Guenther, Melvin S. Zucker, deceased
  • Transducer electrodes for filter or delay lines utilizing surface waves
    Patent number: 4158823
    Abstract: Transducer electrodes for filters or delay lines using surface waves wherein the transducers are formed by interdigital conducting films formed on the surface of piezoelectric substrates and wherein the length of the interdigital electrode fingers vary and wherein all of the fingers on at least one side are attached to an enlarged metal area which has a width equivalent to the total width of all of the electrode fingers on this side.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: June 19, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wilhelm Kuny, Karl Langecker
  • Charge transfer transversal filter
    Patent number: 4156858
    Abstract: A transversal filter of the split electrode type employing a bucket-brigade device (BBD) is described. The BBD wells extend beyond the edges of the clocked gates of the BBD below second gates of different areas. These mask programmed second gates provide the filter output. Unlike other split electrode, capacitance sensing filters, these gates are not clocked, thus the filter has simplified output circuitry and a greater dynamic range.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: May 29, 1979
    Assignee: Reticon Corporation
    Inventors: Gene P. Weckler, Robert W. Brodersen
  • Waveguide diode mount
    Patent number: 4156861
    Abstract: A microwave-type device such as a mixer is disclosed having an improved diode mount with the position of the diode within the waveguide determined solely by the position of a contact rod extending into the waveguide on the side of the waveguide opposite the ground contact of the diode. The contact rod mates with the active contact of the diode by an annular spring fashioned at the waveguide end of the rod. The annular spring also provides a stop against which the diode rests thus determining its position. Electrical connection to the ground contact is made through a second annular spring. A coil spring provides longitudinal force holding the diode in position against the contact rod.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: May 29, 1979
    Assignee: Raytheon Company
    Inventors: John A. DeMambro, Carl G. Dahl, Robert S. Donaldson
  • Multipole resonator
    Patent number: 4156214
    Abstract: Three electrode pairs are formed on a monolithic piezoelectric element which exhibits anisotropic properties with respect to its X and Z axes. The electrodes of each pair are located on opposite sides of the piezoelectric element, with all electrodes being of predetermined dimensions. The first and second electrode pairs are aligned on the X axes at a predetermined spacing therebetween. The second and third electrode pair are aligned on the Z axis, also at a predetermined spacing.In circuit operation, a signal to be processed is coupled to the first electrode pair and extracted from the third electrode pair, with the electrodes of the second pair shorted together. In this manner, the resonator displays a three pole passband characteristic having excellent spur suppression.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: May 22, 1979
    Assignee: Motorola, Inc.
    Inventors: Aristotelis S. Arvanitis, Stanley Malinowski, Corwin E. Livenick
  • Ninety degree phase stepper
    Patent number: 4153994
    Abstract: A 90 degree phase stepper is described comprising a tandem array of three, 3 db hybrid couplers where the first and third couplers are of one variety (either 90 degree or 180 degree couplers) and the second is of the other variety. A pair of variable phase shifters are located in the two wavepaths connecting the first and second couplers, and a single variable phase shifter is included in one of the two wavepaths connecting the second and third couplers. Each phase shifter introduces either a zero or a 180 degree phase shift. By the appropriate selection of phase shifts, the phase of the output signal can be stepped in 90 degree increments. The stepper is designed for use in the signal combining circuit of a space diversity system. It is an advantage of the circuit that all of the received signal is preserved.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: May 15, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Chung-Li Ren
  • Surface acoustic wave ring filter
    Patent number: 4155057
    Abstract: A surface acoustic wave low loss filter device having input and output transducers located along opposed sides of a rectangular propagation path with frequency selective reflective gratings at each of the four corners of the rectangle. Two traveling surface waves traverse the device along opposed paths encountering frequency filtering at the gratings. The two waves arrive at the output transducer additively in phase eliminating the bidirectionality loss normally associated with surface acoustic wave devices. At frequencies for which the gratings are reflective there can be nearly lossless transmission from input to output. At all other frequencies, transmission between input and output transducers is negligible. The device has high sidelobe rejection, adjustable passband skirt slopes, and an adjustable bandwidth.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: May 15, 1979
    Assignee: Raytheon Company
    Inventors: Frank Sandy, Manfred B. Schulz
  • Cascaded grating resonator filters with external input-output couplers
    Patent number: 4155056
    Abstract: Acoustical and optical surface wave filters are described wherein the filter characteristic near resonance is provided by cascaded grating resonators. The out-of-band suppression for these resonators is provided by a track changing element that includes a four-port directional coupler having one port connected to receive input energy and a fourth port connected to couple energy into the cascaded grating resonators. Tapered and chirped reflection gratings are positioned so as to selectively reflect energy present at the second and third ports of the directional coupler. In a surface acoustic wave embodiment of the invention, the directional coupler is provided by a multistrip coupler. In an optical embodiment, the directional coupler function is provided by waveguiding structures that are brought sufficiently close to induce 3 dB coupling.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: May 15, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Peter S. Cross, Ronald V. Schmidt
  • Wave device having a reverse domain grating
    Patent number: 4155055
    Abstract: This invention relates to a wave device comprising a single domain lithium niobate substrate having thereon a grating wherein the grating comprises single domain regions of lithium niobate having their plus c-axis direction substantially opposite the plus c-axis direction of the substrate.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: May 15, 1979
    Assignee: RCA Corporation
    Inventor: William Phillips
  • Electrically tunable bandpass filter
    Patent number: 4153887
    Abstract: A bandpass filter is described for filtering a television signal. The filter has a passband which may be selectively centered for filtering signals in one of two channels of the television receiver. The television channel at which the filter passband is centered is selectable by applying a voltage to a control terminal. The filter frequency response for each channel selected may be independently controlled and a linear phase response is realized for the selected channel minimizing distortion.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: May 8, 1979
    Assignee: The Magnavox Company
    Inventor: Rocco Poppa
  • Ninety degree phase stepper
    Patent number: 4153886
    Abstract: A 90 degree phase stepper is described comprising a tandem array of one 90 degree hybrid coupler and one 180 degree hybrid coupler. A phase shifter, capable of introducing either zero or 180 degrees of phase shift, is included in each of the two wavepaths connecting the two couplers. By the appropriate selection of phase shifts, the phase of the output signal can be continuously increased or decreased in 90 degree or 180 degree increments.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: May 8, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Hotze Miedema
  • Microminiature electrical delay line utilizing thin film inductor array with magnetic enhancement and coupling
    Patent number: 4152679
    Abstract: A microminiature electrical delay line utilizes an m-derived filter formed by depositing a film of permalloy or other high permeability metal on a quartz or other dielectric substrate, then depositing a layer of quartz or other dielectric over the permalloy film, after which a plurality of microminiature thin film inductance coils are deposited on the dielectric layer and joined together electrically in series, a top layer of quartz or other dielectric then is deposited over the interconnected coils and a strip of permalloy or other high permeability metal is deposited over the top dielectric layer to extend across the coils, a gap being provided in the strip of permalloy at the central axis of each coil.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: May 1, 1979
    Assignee: Hull Corporation
    Inventor: Stephen T. C. Chen
  • Cascade charge coupled delay line device for compound delays
    Patent number: 4152678
    Abstract: A cascade charge coupled delay circuit including a plurality of serial delay line sections formed on a single semiconducter wafer, said delay line sections being directly coupled to one another through the wafer and means for independently clocking each section of said lines.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: May 1, 1979
    Assignee: Board of Trustees of the Leland Stanford Jr. Unv.
    Inventors: John D. Shott, Roger D. Melen, James D. Meindl
  • Method and device for simplified connection of two circular wave guides
    Patent number: 4152681
    Abstract: A method and device enabling simplified connection of two circular wave guides and reduction of the manufacturing price. The method consists of expanding the outer steel casings so as to form flanges on the end of sleeves having a larger diameter than the remainder of the casing. The inner guides are connected together by hoops and possibly a clamp ring. The flanges are then welded together. Application to electromagnetic wave guides.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: May 1, 1979
    Assignee: Les Cables de Lyon
    Inventor: Jean Berge
  • Surface acoustic wave grating
    Patent number: 4151492
    Abstract: A reflective grating for a surface acoustic wave device is formed of interleaved sets of contiguous metal strips deposited on the surface of the device. The metal in one set of the strips has a density greater than that of the acoustic propagating medium of the device while the metal of the second set of strips has a density essentially equal to that of the acoustic propagating medium of the device. Typically, a piezoelectric material such as a crystal of quartz or a crystal of lithium niobate is utilized as the base material of the device with the grating being formed of an overlay of alternating strips of gold and aluminum.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: April 24, 1979
    Assignee: Raytheon Company
    Inventors: Frank Sandy, Clarence J. Dunnrowicz
  • Acoustic periodic structure
    Patent number: 4150346
    Abstract: An acoustic periodic structure for slow wave propagation and filtering having a corrugated surface with traction-free boundaries which can support a horizontally polarized shear surface wave that travels much slower than the bulk shear wave velocity and that exhibits an upper cut-off frequency. Electrodes are located on the tops of the teeth forming the corrugated surface and alternate electrodes are excited out of phase, the distribution of the excitation voltage phases determining the particular mode of resonance.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: April 17, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Bertram A. Auld
  • Charge transfer device transversal filter having electronically controllable weighting factors
    Patent number: 4149128
    Abstract: A charge transfer device transversal filter is provided having electronically controllable weighting factors. Two equivalent and corresponding charge transfer device shift registers have floating electrodes sandwiched between the sensing electrodes and the substrate for biasing the underlying depletion regions and thereby controlling the effective capacitances thereof. Depletion capacitances are controlled so as to produce desired weighting factors when corresponding and otherwise equal charging currents are substrated one from the other.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: April 10, 1979
    Assignee: International Business Machines Corporation
    Inventor: James M. White
  • Beam lead rod assembly
    Patent number: 4147998
    Abstract: A beam lead rod assembly for incorporation into an electromagnetic wave coaxial transmission line structure. The rod assembly comprises a beam lead holder and a beam lead device. The holder includes a cylindrical body of a dielectric material and a conductive coating surrounding each end portion of the body for conductively connecting each side of the body to a different portion of the transmission line. The conductive regions are separated by a circumferential gap so that there is no conduction between the two conductive regions. The beam lead device is disposed across the gap with opposite beam leads being conductively connected to opposite conductive regions.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: April 3, 1979
    Assignee: Krytar
    Inventor: Thomas J. Russell
  • Phase weighted acoustic reflective array compressor
    Patent number: 4146852
    Abstract: An acoustic surface wave signal transmission device includes a medium having a surface suitable for propagating acoustic energy or waves and having a first impedance characteristic. The surface of the medium includes an array of periodic discontinuities of a second impedance characteristic. The widths of the discontinuities vary in a predetermined manner to reflect a portion of said acoustic energy in proportion to the widths of the discontinuities. A transmitting transducer on said surface converts an input electrical signal into corresponding acoustic energy or waves and launches the energy or waves on said medium toward said array of discontinuities. The acoustic energy is reflected from said array of discontinuities toward a receiving transducer which converts the reflected acoustic energy or waves into a corresponding electrical signal.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: March 27, 1979
    Assignee: Westinghouse Electric Corp.
    Inventors: James T. Godfrey, Carl E. Nothnick, Robert A. Moore