Information extraction for Doppler radar

Details Information extraction for Doppler radar Information extraction for Doppler radar

1976-01-22

1977-09-13

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310318, 333 6, H03H 932, H03H 748

Patent

active

040485951

ABSTRACT:
A filter array is provided for extracting velocity information from the return pulse of a Doppler radar system. The array consists of a plurality of two-pole, bandpass crystal filter networks directly connected in parallel, the filter networks including crystal resonators and all but one of the networks having reactances in series with the resonators. The crystal resonators are identical in all of the networks and the reactances change progressively in successive networks in such a manner that adjacent filter networks respond to contiguous frequency bands.

REFERENCES:
patent: 2459019 (1949-01-01), D'Heedene
patent: 3426300 (1969-02-01), Ho
patent: 3613031 (1971-10-01), Pond

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