Communications: directive radio wave systems and devices (e.g. – Radar ew – Detection of surveilance
Patent
1997-09-12
1999-05-04
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Detection of surveilance
455227, G01S 740
Patent
active
059008326
ABSTRACT:
An input stage for a police radar detector includes a single mixer together with at least one preamplifier to detect radar signals in the X, K and K.sub.a bands. A preamplifier may be used on the X band alone, the K band alone, the K.sub.a band alone, the X and K bands or the X, K and K.sub.a bands. The use of these preamplifiers provides better noise figure; however, multiple responses cannot be scanned at the same time in bands utilizing a preamplifier with sufficient selectivity to reduce noise in its respective image bands to tolerable levels so that some or all of the receiver responses are swept independently with the preamplifier or preamplifiers being enabled one at a time as appropriate for each band being scanned. Since more sweep time is required when multiple responses are no longer swept simultaneously, a currently preferred form of the input stage couples the K.sub.a band signals to a single mixer through a preamplifier which permits multiple responses to be swept in the K.sub.a band, or passively for economy, to receive dual responses in the K.sub.a band. Utilizing a novel frequency scheme for a radar detector yields two responses approximately 1.3 Ghz apart that fall within the K.sub.a band so that the K.sub.a band can be swept by tuning the first LO 124 through a 1.3 Ghz range with the two responses covering the 2.6 Ghz required for sweeping the entire K.sub.a band.
REFERENCES:
patent: 3707718 (1972-12-01), Ames
patent: 4196393 (1980-04-01), Scweitzer
patent: 4862175 (1989-08-01), Biggs et al.
patent: 4887086 (1989-12-01), Unser et al.
patent: 4939521 (1990-07-01), Burin
patent: 4952936 (1990-08-01), Martinson
patent: 5068663 (1991-11-01), Valentine et al.
patent: 5083129 (1992-01-01), Valentine et al.
patent: 5116248 (1992-05-01), Hiers et al.
patent: 5146226 (1992-09-01), Valentine et al.
patent: 5206651 (1993-04-01), Valentine et al.
patent: 5268689 (1993-12-01), Ono et al.
patent: 5305007 (1994-04-01), Orr et al.
patent: 5315302 (1994-05-01), Katsukura et al.
patent: 5341138 (1994-08-01), Ono et al.
patent: 5446923 (1995-08-01), Martinson et al.
Groth Clarence Richard
Scholl Stephen Ray
Valentine Michael David
Sotomayor John B.
Valentine Research, Inc.
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