Wideband microwave detector

Details Wideband microwave detector Wideband microwave detector

1994-07-18

1995-10-24

Bentley, Stephen C.

Communications: directive radio wave systems and devices (e.g.,

Radar ew

Detection of surveilance

455227, 455315, G01S 740, H04B 1700

Patent

active

054613833

ABSTRACT:
A wideband microwave detector includes: a first local oscillator outputting a first local oscillation output containing a basic wave component, a secondary high harmonic component and a tertiary high harmonic component and being swept within a predetermined frequency range; a first mixer performing frequency mixing of the first local oscillation output and an antenna input input through an antenna and outputting a first mixing output; a second local oscillator outputting a second local oscillation output; a second mixer performing frequency mixing of the first mixing output and the second local oscillation output for generating a second mixing output, a single frequency discriminator for detecting a specific frequency in a discrimination input, and mode selector switch alternately switching a single super heterodyne reception mode, in which the first mixing output of the first mixer is introduced into the frequency discriminator as the discrimination input and a double super heterodyne reception mode, in which the second mixing output of the second mixer is introduced into the frequency discriminator as the discrimination input, in synchronism with sweep operation of the first local oscillator.

REFERENCES:
patent: 4313216 (1982-01-01), Jaeger et al.
patent: 4622553 (1986-11-01), Baba et al.
patent: 4630054 (1986-12-01), Martinson
patent: 4954828 (1990-09-01), Orr
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: 5389930 (1995-02-01), Ono

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