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Class Information
Number: 342/205
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > With particular circuit > Sensitivity time control (stc)
Description: Subject matter including means to vary the gain (sensitivity) of the radar receiver as a function of time within each pulse repetition interval or observation time in order to prevent overloading of the receiver by strong echoes from targets or clutter at close ranges.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8599060 Clutter reduction in detection systems Dec. 3, 2013
8456352 Methods and apparatus for automatic STC from sea state measurement via radar sea clutter eccentricity Jun. 4, 2013
8223065 Methods and systems for partitioning a radar acquisition volume Jul. 17, 2012
8174435 Methods and apparatus for non-isotropic sea clutter modeling May. 8, 2012
8004451 Adaptive microwave security sensor Aug. 23, 2011
7796082 Methods and apparatus for log-FTC radar receivers having enhanced sea clutter model Sep. 14, 2010
7693499 Transmission path and method for signal processing in a transmission path Apr. 6, 2010
7576683 Methods and systems for reducing interference caused by antenna leakage signals Aug. 18, 2009
7551988 Method of software defined radio (SDR) waveform/function management Jun. 23, 2009
7499796 Driver information device Mar. 3, 2009
6972709 Radio frequency transceiver Dec. 6, 2005
6965341 High resolution SAR processing using stepped-frequency chirp waveform Nov. 15, 2005
6903679 Video amplifier for a radar receiver Jun. 7, 2005
6842139 Separation frequency detection in a radar level gauge Jan. 11, 2005
6741203 Adaptive radar thresholds system and method May. 25, 2004
6404378 Device for increasing the dynamic range of frequency-modulated continuous-wave radar Jun. 11, 2002
6104197 Apparatus for acquiring waveform data from a metallic transmission cable Aug. 15, 2000
6087977 False alarm rate and detection probability in a receiver Jul. 11, 2000
5905459 Methods and apparatus for stabilizing radar false alarm rate May. 18, 1999
5805107 Cost-effective method for determining a pulse response of a high-resolution, band-limited radar channel Sep. 8, 1998
5337054 Coherent processing tunnel diode ultra wideband receiver Aug. 9, 1994
5311184 Airborne weather radar system with aircraft altitude and antenna tilt angle dependent sensitivity time control May. 10, 1994
5298905 Visible light detection and ranging apparatus and method Mar. 29, 1994
5293325 Apparatus and method for compensating a radar's sensitivity timing control circuit Mar. 8, 1994
5221928 Method and apparatus for accurate, high speed pulse-echo measurement calibration Jun. 22, 1993
5196854 Inflight weather and ground mapping radar Mar. 23, 1993
5115242 In-furnace slag level measuring apparatus May. 19, 1992
5050986 Synchronization system for controlling switches Sep. 24, 1991
4994811 Sensitivity time control device Feb. 19, 1991
4837579 Pulse radar threshold generator Jun. 6, 1989
4728953 Closed loop control of receiver turn-on to increase radar sensitivity Mar. 1, 1988
4529983 Apparatus and method for the correction of attenuation-induced errors in a weather radar receiver Jul. 16, 1985
4524361 Radar systems employing two kinds of pulses Jun. 18, 1985
4509050 Automatic adaptive sensitivity time control for a ground mapping radar Apr. 2, 1985
4451909 Ultrasonic wave distance detection system May. 29, 1984
4435707 Weather radar with signal compensation for precipitation Mar. 6, 1984
4415897 Precision control of RF attenuators for STC applications Nov. 15, 1983
4378596 Multi-channel sonic receiver with combined time-gain control and heterodyne inputs Mar. 29, 1983
4370652 Control systems for radar receivers Jan. 25, 1983
4307456 Ultrasonic rangefinder Dec. 22, 1981
4228435 Radar sensitivity time control using range gated feedback Oct. 14, 1980
4213126 Airport surface detection equipment (ASDE) Jul. 15, 1980
4194200 Combined receiver protector, AGC attenuator and sensitivity time control device Mar. 18, 1980
4189714 Analog-to-digital circuit with adjustable sensitivity Feb. 19, 1980
4169263 Variable threshold signal detecting apparatus Sep. 25, 1979
4132991 Method and apparatus utilizing time-expanded pulse sequences for distance measurement in a radar Jan. 2, 1979
4100544 Beacon system employing ramped gain receiver Jul. 11, 1978
4095222 Post-detection STC in a medium PRF pulse doppler radar Jun. 13, 1978
4093948 Target detection in a medium pulse repetition frequency pulse doppler radar Jun. 6, 1978
4065768 Radar apparatus Dec. 27, 1977

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