First and fourth harmonic system

Details First and fourth harmonic system First and fourth harmonic system

1956-10-04

1976-11-16

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 12R, 343 14, 343 172R, G01S 938

Patent

active

039927113

ABSTRACT:
3. A radar system comprising a continuous wave transmitter which transmits a carrier frequency signal, a relatively low frequency source coupled to the transmitter for phase modulating the carrier signal, a receiver for receiving an echo signal and coupled to said transmitter, said receiver including a mixer for beating the echo signal with the carrier signal, means for separating and selectively amplifying the first and fourth harmonic components of the mixer output signal, and means for comparing said components.

REFERENCES:
patent: 2407287 (1946-09-01), Labin
patent: 2408048 (1946-09-01), Deloraine
patent: 2426204 (1947-08-01), Grieg
patent: 2453169 (1948-11-01), Varian
patent: 2931030 (1960-03-01), Rey

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