Raytheon Company

Hughes Aircraft Company

Hughes Electronics Corporation

Richard T. Hennegan

Cheng P . Wen

Richard T Hennegan

Jeffrey A Paul

Chaim Warzman

Roy Wien

Raymond Santos, Jr

Steve Blacketer

Harry B Marr

Cheng P Wen

Denpol Kultran

Richard P Mintzlaff

Cheng P  Wen

There is provided a finite impulse response (FIR) filter for filtering an input voltage signal to generate an output current signal, the FIR filter including a plurality of sample and hold (SH) circuits configured to simultaneously receive the input voltage signal, to sample the input voltage signal at successive sample times according to a sample clock, and to generate a plurality of sampled voltage signals, and a plurality of programmable analog multipliers coupled to the plurality of SH circuits and configured to multiply the plurality of sampled voltage signals by a plurality of binary multiplication factors to generate the output current signal.

Discrete time polyphase channelizer

Methods and apparatus for a receiver having a single sideband mixer with all pass networks to remove unwanted sidebands down conversion of signals. In exemplary embodiments, a single chip receive/transceiver can be used in phased array radars. Since the need for bulky off-chip switch filter banks is eliminated, the number of chips for phased array antenna elements can be increased.

Methods and apparatus for signal sideband receiver/transceiver for phased array radar antenna

An integrated point-to-point microwave radio frequency unit/antenna has a housing, a microwave antenna affixed to the front face of the housing, and a microwave radio frequency transceiver electronics package within the housing. The transceiver electronics package includes a circuit board having transmitter and receiver intermediate frequency processors. The transceiver electronics package further includes a microwave transmitter and a microwave receiver, each utilizing monolithic microwave integrated circuit architecture. The signals of the microwave transmitter and microwave receiver are preferably of different frequencies and are diplexed for communication with the antenna.

Compact microwave terrestrial radio utilizing monolithic microwave

A frequency upconversion circuit in a millimeter wave radio transmitter uses a low frequency synthesizer and a parallel frequency mixing and multiplication network for converting a low frequency signal to a millimeter wave radio frequency (RF) signal. A frequency downconversion circuit in a millimeter wave radio receiver uses a low frequency synthesizer and a parallel frequency mixing and multiplication network for converting a millimeter wave RF signal to a low frequency signal.

Frequency conversion circuit and method for millimeter wave radio

A waveguide evanescent mode filter is integrated with a monolithic microwave integrated circuit (MMIC) by forming both the MMIC circuitry and the waveguide filter on a single substrate that forms a common ground plane for both elements. The waveguide has a superstructure with an interior recess that is contoured to provide a desired cutoff frequency. The underlying portion of the ground plane can form the lower portion of the waveguide itself, and can also be contoured to define the cutoff frequency. Adjustable attenuation is provided by a resistive card that can be inserted by different amounts into the waveguide.

Integrated evanescent mode filter with adjustable attenuator

A field effect transistor FMCW radar transceiver for short-range target detection, employs a varactor-tuned, gallium arsenide field effect transistor, voltage-controlled oscillator in the dual role of the transmitter signal source and the local oscillator. The radar transceiver is capable of operating at low IF frequencies for short range, which can be less than 30 feet, target detection.

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Torrance, CA, United States of America

Richard T Hennegan