Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-11-14
1977-07-12
Jordan, Charles T.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 77, 343 8, G15
Patent
active
040357970
ABSTRACT:
A diplex doppler radar is described which includes an RF generator which generates an RF signal alternating between two selected frequencies. The RF signals are selectively vertically or horizontally polarized and transmitted by an antenna. A circuit is responsive to the received colinear and cross-polarized RF signals reflected from an object and provides an output representing the sum of the ratios of the colinear vertically polarized received signal to the colinear horizontally polarized received signal, the colinear vertically polarized received signal to the cross-polarized received signal, and the colinear horizontally polarized received signal to the cross-polarized received signal. The derivative of the sum of the ratios is divided by a signal representing the range rate of change between the obstacle and the radar system to generate a resulting signal which provides information relating to target identification and discrimination.
REFERENCES:
patent: 3716856 (1973-02-01), Beguin
patent: 3719945 (1973-03-01), Sletten et al.
patent: 3772689 (1973-11-01), Root, Jr.
Conkey H. N.
General Motors Corporation
Jordan Charles T.
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