Patents Examined by Paul L. Gensler
  • Patent number: 4595890
    Abstract: A circular waveguide dual antenna feed for TVRO reception, which transfers horizontally and vertically polarized received signals in the circular waveguide simultaneously into two coaxial lines parallel with and offset from the circular waveguide axis. For coupling to existing LNA's, the separate coaxial lines from the circular waveguide are extended into a rectangular waveguide which couples to the input-mixer of the conventional LNA. Alternatively, the separate coaxial lines can be coupled separately to two LNA's or they can be combined into a single output terminal. Switching means are provided in each channel so that each channel can be rendered operative or inoperative, as desired. Diode switches are shown. The device requires no moving parts.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: June 17, 1986
    Assignee: Omni Spectra, Inc.
    Inventor: Donald C. Cloutier
  • Patent number: 4581596
    Abstract: Interference suppression filter, including a metal cup having an open end, a ring core choke, a wound capacitor and a discharge resistor being interconnected and cast together in the metal cup, first and second network side and appliance side connectors being extended outwardly through the open end of the cup, the first connectors each being connected to the ring core choke and having free ends, an insulator plate disposed adjacent the open end of the cup, and resilient clamping elements being disposed on the plate, at least the free ends of the first connectors being held by the clamping elements, and the second connectors being dip-soldered to the first connectors.
    Type: Grant
    Filed: February 8, 1982
    Date of Patent: April 8, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventors: Josef Dirmeyer, Karl Holzmann, August Kaser, deceased, Hans Kornstadt, Josef Kraus, Joachim Muller, Ernst Schmidt
  • Patent number: 4535307
    Abstract: A microwave circuit device package including a conductive housing and selectively interchangeable transmission line sections each one thereof being disposable in such housing and means for tuning and matching the impedance of the disposed transmission line section to the impedance of a device connected thereto over a relatively wide frequency band of applied signals. Such tuning means includes a conductive member of predetermined dimensions slidably mounted in proximity to a selected conductor portion of one of such transmission line sections. Such transmission line sections include a straight continuous in-line configuration for high frequencies or serpentine strip conductor configurations for low and intermediate frequencies, each one of such serpentine strip conductor configurations defining a different acute angle relative to the conductive member. The microwave circuit housing is used to test, calibrate, evaluate or characterize the properties of the connected device over the wide frequency bandwidths.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: August 13, 1985
    Assignee: Raytheon Company
    Inventor: Toshikazu Tsukii
  • Patent number: 4514708
    Abstract: The invention is a mechanism for holding a waveguide assembly and a down converter module in locked force multiplied engagement within a transceiver housing. The mechanism includes a lever arm which pivots about a first end which is secured to a bracket. The bracket in turn is secured to the transceiver housing. A knob which includes a locking structure is coupled to the second end of the lever arm. The locking structure is retained in a channel in the transceiver housing. The channel allows the locking structure to move within the channel between a first and second position. There is a camming surface on the lever arm that is more proximate to the first end of the lever arm than to the second end of the lever arm. An aligning pin is mounted on said first assembly in a location so as to engage the lever arm camming surface when the locking structure is physically moved along the transceiver housing channel from a first position to a second position.
    Type: Grant
    Filed: February 26, 1982
    Date of Patent: April 30, 1985
    Assignee: Motorola, Inc.
    Inventor: Gerald W. Ludtke
  • Patent number: 4506237
    Abstract: An adjustable slope equalizer is disclosed for maintaining a predetermined output level at a predetermined frequency. An equalizer comprises: an adjustable input means; a first voltage divider means having an output and having an input operatively connected to the low impedance input means; a second voltage divider means having an output and having an input operatively connected to the low impedance input means; an adjustable high impedance means having an output and having at least two inputs operatively connected to the outputs of the first and second voltage divider means; and a SAG correction means operatively connected to the output of the adjustable high impedance means. The output of the SAG correction means has the predetermined output level at the predetermined frequency for any setting of the adjustable high impedance means.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: March 19, 1985
    Assignee: Rockwell International Corporation
    Inventor: Lester T. Matzek
  • Patent number: 4503434
    Abstract: A lossless and matched dual mode network (10) in which the maximum voltage amplitudes (a, b, and c, respectively) appearing at three output ports (11, 12, 13), are preselected and are arbitrary subject only to the constraint that the sum of the squares of any two elements of the set (a, b, c) must be equal to or greater than the square of the third element of this set. The set of complex voltages (A, B, and C, respectively) appearing at the three output ports (11, 12, 13) when an input signal is applied to one of the input ports (1 or 2) is conjugate with the set of output voltages (AA, BB, and CC, respectively) appearing at the three output ports (11, 12, 13) when an input signal is applied to the other input port, which is isolated from the initially selected input port (1 or 2). The network (10), which may be used as a feed network in an antenna (25) system, e.g., as an even/odd mode network, comprises three 90.degree. couplers (31, 32, 33 ) and three phase shifters (41, 42, 43).
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: March 5, 1985
    Assignee: Ford Aerospace & Communications Corporation
    Inventor: Howard H. Luh
  • Patent number: 4503379
    Abstract: A continuously-variable septum for rotation of electric field polarization in a circular waveguide comprising a continuous, serpentine-shaped, electrically conductive filament.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: March 5, 1985
    Assignee: Chaparral Communications, Inc.
    Inventor: Clifford Raiman
  • Patent number: 4499471
    Abstract: A reconfigurable dual mode network (10) in which the maximum voltage amplitudes (a, b, and c, respectively) appearing at three output ports (11, 12, 13), are preselected, reconfigurable, and arbitrary subject only to the constraint that the sum of the squares of any two elements of the set (a, b, c) must be equal to or greater than the square of the third element of this set. The set of complex voltages (A, B, and C, respectively) appearing at the three output ports (11, 12, 13) when an input signal is applied to one of the input ports (1 or 2) is conjugate with the set of output voltages (AA, BB, and CC, respectively) appearing at the three output ports (11, 12, 13) when an input signal is applied to the other input port, which is isolated from the initially selected input port (1 or 2). The lossless and matched network (10), which may be used as a feed network in an antenna (25) system, e.g.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: February 12, 1985
    Assignee: Ford Aerospace & Communications Corporation
    Inventor: Howard H. Luh
  • Patent number: 4499438
    Abstract: Disclosed is a high frequency attenuation core and cable. The core includes a conductor surrounded by a high frequency energy absorbing medium, then surrounded by a dielectric, and then surrounded by an outer layer made from a material having a high complex dielectric constant. The cable includes the above described core surrounded by an electromagnetic interference (EMI) shield which is further surrounded by a conductive layer. The cable and core as described above may be used in harness applications wherein a plurality of cores and/or cables as described above are surrounded by a gross shield. In addition, when the cores described above are used in multi-core applications, they may individually include an additional EMI shield for greater electromagnetic interference protection.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: February 12, 1985
    Assignee: Raychem Corporation
    Inventors: Rajendra S. Cornelius, Albert R. Martin, Hans E. Lunk, Mark D. Mendenhall
  • Patent number: 4492938
    Abstract: A variable ratio power combiner employs, as its major coupling component, one or more septum polarizers and associated 90.degree. differential phase shifters or quarter waveplates in place of conventional OMTs. Advantageously, a septum polarizer is a relatively simple component that serves the same function as an OMT and polarizer combination. Because it has an essentially T-shaped configuration, it can bring a pair of waveguide arms together in the same plane back-to-back, so that the resulting power combiner may provide the desired symmetrical coupling. Normally the variable ratio power combiner requires only symmetrical inputs for the sources and not both symmetrical inputs and outputs, so that only a single septum polarizer and associated quarter waveplate are employed, with an OMT used for the output. For a completely symmetrical configuration, however, the other OMT may be replaced by a separate septum polarizer/rotatable quarter waveplate arrangement.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: January 8, 1985
    Assignee: Harris Corporation
    Inventor: Lock R. Young
  • Patent number: 4490692
    Abstract: An equalization network is disclosed combining negative slope equalization with low pass filtering and low frequency compensation. The network is for use on electrical lines transmitting electrical signals in the voice frequency range and includes circuitry for inputting and equalizing the electrical signal on an incoming line. A circuit for reverse equalizing the electrical signal, first and second circuits for equalizing the signal, circuits for low pass filtering the signal followed by a supplemental equalization circuit and then a circuit for outputting the signal to the outgoing electrical line are provided.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: December 25, 1984
    Assignee: Rockwell International
    Inventor: Ian A. Schorr
  • Patent number: 4490691
    Abstract: In a first aspect of the invention, compressor and expander circuits are arranged in series, the dynamic actions of the circuits being substantially separated with respect to level. The changing gain portions of the characteristics are staggered among the series circuits such that the resulting overall characteristic has a maximum compression or expansion ratio substantially no greater than that of any single circuit while providing more compression or expansion than for any of the circuits individually. A second aspect, referred to as "spectral skewing", effects a reduction of the influence of signals in the high and/or low frequency extremes of a signal transmission system on the action of a compressor feeding the transmission channel. Consequently, a complementary expander fed by the channel is less likely to be controlled by signals at frequencies subject to transmission channel errors. A third aspect provides an anti-saturation effect.
    Type: Grant
    Filed: September 10, 1981
    Date of Patent: December 25, 1984
    Inventor: Ray M. Dolby
  • Patent number: 4488125
    Abstract: Novel discrete coaxial cable and coaxial cable assembly constructions are disclosed. One preferred embodiment of the invention is a flat coaxial cable assembly. The invention also provides a novel method for manufacturing the coaxial elements which are the primary structural components of the coaxial cables and assemblies. In this method a signal wire and at least one drain wire are embedded in a minor matrix of dielectric material. A portion of the minor matrix material is peeled or skived away to expose the drain wire or wires. The resulting product is then wrapped in metal foil so that the foil makes electrical contact with the exposed drain wires. This step yields a completed coaxial element. A single element may be embedded in a major matrix of dielectric to yield a coaxial cable or several elements may be so embedded to yield a coaxial cable assembly.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: December 11, 1984
    Assignee: Brand-Rex Company
    Inventors: John M. Gentry, Virgil T. Bolick, Jr., Kenneth W. Brownell, Jr.
  • Patent number: 4486723
    Abstract: A pair of oppositely poled PIN diodes is connected in series across a reactive element. First and second switching circuits responsive to a common control network are serially connected between high and low voltage points. The junction between the switching circuits is connected to the common junction of the PIN diodes. When the first switching circuit is made non-conductive and the second conductive, the PIN diodes are forward biased. When the first switching circuit is made conductive and the second non-conductive, the PIN diodes are reverse biased. In this way the reactive element is switched into and out of a tuned circuit.
    Type: Grant
    Filed: January 6, 1983
    Date of Patent: December 4, 1984
    Assignee: RCA Corporation
    Inventor: Morris Lysobey
  • Patent number: 4486725
    Abstract: The arrangement to support a waveguide for transportation and handling and to support and protect a horizontal waveguide having a plurality of waveguide sections connected to each other in tandem suspended between two given spaced points comprises a plurality of shrouds each encasing a substantial length of a different one of the plurality of sections for support and protection thereof and a suspension means fastened to each end of each of the plurality of shrouds to suspend each of the plurality of waveguide sections from a cable extending between the two given spaced points.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: December 4, 1984
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Charles P. Majkrzak
  • Patent number: 4486722
    Abstract: A coupler network with pin diode switches receives biasing and control information through a biasing network that is essentially transparent to the RF operation of the coupler network.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: December 4, 1984
    Assignee: Rockwell International Corporation
    Inventor: Harvey L. Landt
  • Patent number: 4486721
    Abstract: Disclosed is a high frequency attenuation core and cable. The core includes a conductor surrounded by a high frequency energy absorbing medium, then surrounded by a dielectric, and then surrounded by an outer layer made from a material having a high complex dielectric constant. The cable includes the above described core surrounded by an electromagnetic interference (EMI) shield which is further surrounded by a conductive layer. The cable and core as described above may be used in harness applications wherein a plurality of cores and/or cables as described above are surrounded by a gross shield. In addition, when the cores described above are used in multi-core applications, they may individually include an additional EMI shield for greater electromagnetic interference protection.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: December 4, 1984
    Assignee: Raychem Corporation
    Inventors: Rajendra S. Cornelius, Hans E. Lunk, Albert R. Martin, Mark D. Mendenhall
  • Patent number: 4485362
    Abstract: A variable microwave stripline power divider, in which the power seen at h of two outputs can be varied over a wide range without appreciably changing the power seen at the other output. In one embodiment, this is accomplished mechanically by shorting posts connecting the patch member to a ground plane member of the device at selected points. In another embodiment of the invention, this is accomplished electronically by a plurality of electronic switching devices connected between a like plurality of patch member shorting points and a ground plane member, which are selectively activated by a microcomputer.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: November 27, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Morris Campi, Frederick Farrar, Daniel Shames
  • Patent number: 4485360
    Abstract: An rf load is matched to an rf source by a matching network having series and shunt impedances connected between the source and load. A network coupled to the load derives a first rf signal responsive to rf energy reflected from the load. Another network responsive to the first rf signal derives plural rf signals, each having an amplitude that is a different function of the magnitude and phase angle of the reflected energy. In response to the amplitudes of the plural rf signals, the values of the series and shunt impedances are controlled.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: November 27, 1984
    Assignee: Cincinnati Electronics Corporation
    Inventor: Glen Seward
  • Patent number: 4485361
    Abstract: A package for matching the characteristic impedance of a transmission line to the impedance of a pulsed semiconductor laser diode so that short duration pulses of light can be produced with a fast repetition rate. The package has a toroidal transformer in a cavity of a main body, with a multiturn primary connected to a transmission line. The laser diode is mounted at the edge of a known sandwich between two thin metal plates separated by an insulating layer. A spacer and metal cover cap are placed over the sandwich, and a screw passing through holes of all the parts is threaded into the main body. The screw passing through the transformer core forms a one-turn secondary. Not only does this allow the matching of the characteristic impedance, but also provides heat sinking for the diode. Assembly with a screw makes the unit easy to fabricate, and to replace the laser diode sandwich.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: November 27, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Gerald M. Bender