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Class Information
Number: 342/87
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Return signal controls radar system > Transmitter > Signal phase or frequency other than pulse repetition frequency (prf) > Function of distance > With constant beat frequency
Description: Subject matter wherein a constant beat frequency is maintained between the transmitted and received signals.










Patents under this class:

Patent Number Title Of Patent Date Issued
8358235 Wireless sensor device Jan. 22, 2013
8275493 Bow riding unmanned water-borne vehicle Sep. 25, 2012
RE40128 Stabilization in a radar level gauge Mar. 4, 2008
6385266 Sampling PLL for high resolution radar systems May. 7, 2002
6097331 FM-CW radar system for measuring distance to and relative speed of target Aug. 1, 2000
5717399 Radar device for vehicle use Feb. 10, 1998
5619208 FM-CW radar system Apr. 8, 1997
5016016 Volume-scattered echo discrimination device for FM/CW range measuring radar and use in a radio altimeter May. 14, 1991
4812035 AM-FM laser radar Mar. 14, 1989
4665401 Millimeter wave length guidance system May. 12, 1987
4599618 Nearest return tracking in an FMCW system Jul. 8, 1986
4568938 Radar altimeter nearest return tracking Feb. 4, 1986
4509049 FMCW system for providing search-while-track functions and altitude rate determination Apr. 2, 1985
4503433 Range measurement by means of frequency modulated continuous wave radar Mar. 5, 1985
4464662 Determining azimuth of a transponder by measuring a plurality of phase shifts Aug. 7, 1984
4367473 Distance measuring equipment utilizing frequency modulation Jan. 4, 1983
4302758 Radar system for determining range and speed of an object Nov. 24, 1981
4276549 FM-CW Radar distance measuring apparatus Jun. 30, 1981
4205314 Device for measuring the range of a moving target and the speed at which it approaches or recedes May. 27, 1980
4107679 Frequency modulator for high-precision range measurements Aug. 15, 1978











 
 
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