Unidirectional amplitude sensitive noise riding threshold circui

Details Unidirectional amplitude sensitive noise riding threshold circui Unidirectional amplitude sensitive noise riding threshold circui

1989-06-30

1990-04-24

Tarcza, Thomas H.

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

Return signal controls radar system

Receiver

328162, G01S 1300

Patent

active

049203460

ABSTRACT:
An RF multiplexer divides an incoming signal from an RF antenna into disce frequency bands. Each frequency band has its own separate circuit on separate lines to operate on the frequency band and determine if a radar signal is present or if only noise is present on the line. This is done by comparing the incoming signal for magnitude with a DC signal that is generated within the circuit and is proportional to the noise within the frequency band. An indication that any of the signals within the discrete frequency bands exceed the DC signal generated within the same band results in an alarm indication.

REFERENCES:
patent: 3781569 (1973-12-01), Rosenbaum et al.
patent: 3961274 (1976-06-01), Jones et al.
patent: 4228435 (1980-10-01), Nevin
patent: 4309763 (1982-01-01), Passmore et al.
patent: 4377759 (1983-03-01), Ohhata et al.
patent: 4806933 (1989-02-01), Halsey et al.

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