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.

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.

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.

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.

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.

Abstract: A continuously-variable septum for rotation of electric field polarization in a circular waveguide comprising a continuous, serpentine-shaped, electrically conductive filament.

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).

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Abstract: Tuning elements are provided for use in varying the inductance of the oscillatory circuits of the transmitter and receiver units of garage door actuators operating at ultra-high frequencies. Each oscillatory circuit is a closed loop circuit fabricated on a printed circuit board. The closed loop circuit comprises a pair of printed circuit conductive paths having a fixed capacitor connected across one of the ends thereof and a discrete generally U-shaped wire connected across the other of the ends thereof. The conductive paths and the U-shaped wire comprise the inductor of the oscillatory circuit. By bending the discrete U-shaped wire at its connections with respect to the plane of the printed circuit board, the inductance of the oscillatory circuit in each unit can be adjusted as needed so that they both operate at the same resonant frequency.

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.

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.