Altitude determining radar using multipath discrimination

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

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343 12A, G01S 1308

Patent

active

045959250

ABSTRACT:
A height-determining radar utilizing both direct and multipath signals coising a radar transmitter and receiver and means for measuring the variation of the pulse widths of the received radar signal, the variation being caused by fluctuating multipath contribution to the received signal, and further comprising means for calculating the target height h from the equation h=cR.tau..sub.B /4e, where c is the speed of light, R is the target range, .tau..sub.B is the pulse width variation and e is the radar height. The multipath variation may be enhanced by varying the linear polarization of the emitted radar signal.

REFERENCES:
patent: 2837738 (1958-06-01), Van Valkenburgh
patent: 3014215 (1961-12-01), Macdonald
patent: 3714654 (1973-01-01), Wicks et al.
patent: 4090197 (1978-05-01), Cantrell
patent: 4370656 (1983-01-01), Frazier et al.
patent: 4386355 (1983-05-01), Drew et al.

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