| Patent Number |
Title Of Patent |
Date Issued |
| 5434575 |
Phased array antenna system using polarization phase shifting |
July 18, 1995 |
| A circularly polarized phased array antenna system for both reception and transmission applications includes a plurality of planar radiating (or receiving) elements, a switching matrix for each radiating element, a beamforming network and a transmit/receive module. Each planar element |
| 4728805 |
Synaptic radio frequency interactive systems with photoresponsive switching |
March 1, 1988 |
| Synaptic antennas or other radio frequency interactive systems variable in response to photon energy stimuli, are provided from a three-dimensional matrix of electrically conductive segments with photoresponsive devices selectively separating numerous adjacent segments from each other an |
| 4477811 |
Automatic MDS level analyzer |
October 16, 1984 |
| An automatic minimum discernible signal level analyzer for evaluating the low signal level detecting capabilities of a pulse-type receiver and including an RF frequency source phase-locked to the radar transmitter frequency and capable of being adjusted in power output by circuitry which |
| 4293956 |
Double-balanced mixer |
October 6, 1981 |
| A double-balanced mixer device including a planar substrate selectively plated on both sides to form certain mixer component parts and including a pair of quarter wavelength narrow strips extending from the component parts which form one of the balanced lines, such strips having their |
| 4114115 |
Compandor apparatus |
September 12, 1978 |
| Compandor apparatus including a compressor comprised of an operational amplifier having a plurality of gain controlling feedback paths that are respectively responsive to different portions of the input frequency spectrum, and an expandor comprised of an operational amplifier having a |
| 4035736 |
FM discriminator having low noise characteristics |
July 12, 1977 |
| A low noise discriminator circuit having particular utility for use in determining the spectral purity characteristics of an rf signal source and comprising, in addition to standard discriminator components, a down-locked reference signal source including a voltage-controlled signal |
| 3991322 |
Signal delay means using bucket brigade and sample and hold circuits |
November 9, 1976 |
| A signal delay apparatus for delaying an information signal and including a bucket brigade device for sampling the signal and time delaying the samples, a sample-and-hold device for sampling and storing the voltage levels of the individual delayed samples in succession, and a clock for |
| 3983488 |
Frequency-modulation demodulator threshold extension device |
September 28, 1976 |
| A threshold extension device for use in a frequency modulation demodulator circuit to minimize effects of impulse noise, usually referred to as "clicks", which normaly appear in the demodulated output signal, and including a delay line for delaying the demodulated signal, a follow and |
| 3979679 |
FM demodulator having squelch circuit using bucket brigade delay line |
September 7, 1976 |
| An improved squelch circuit for FM demodulators including a low pass filter for filtering out-of-band noise from the demodulator output signals, a delay line for time delaying the filtered signals, a gate for selectively passing the filtered demodulated output signals to an output termin |
| 3942116 |
Transceiver having improved voice actuated carrier and echo suppression circuit |
March 2, 1976 |
| A transceiver comprising a transmit circuit for receiving a transmit audio frequency signal from a voice input transducer and including a delay line for delaying the transmit audio frequency signal, a modulator for converting the delayed transmit audio frequency signal to a transmitable |
