Coherent frequency memory

Details Coherent frequency memory Coherent frequency memory

1975-04-14

1976-07-20

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

328155, 333 10, 333 31R, G01S 738

Patent

active

039710211

ABSTRACT:
A single configuration-invariant hybrid phasing circuit is utilized for both phase detection and phase shifting in a quasi-coherent memory to produce an essentially constant amplitude CW signal which is later gated to produce constant amplitude false range pulses. In one mode of operation the subject circuit acts as a phase detector to sense the phase difference between a portion of the received signal and the recirculated signal. In the other mode of operation the subject circuit acts as a phase shifter to phase shift the recirculated signal such that this phase difference is less than 45.degree.. This effectively adjusts the loop delay for the wavelength of the incoming signal. Thus, the subject circuit adjusts the phase of the signals in a recirculation loop of the quasi-coherent memory such that no portion of the CW signal formed during the recirculation is out of phase with any other portion by more than 45.degree., to thereby limit amplitude variations in the transmitted pulse level with frequency.

REFERENCES:
patent: 3044061 (1962-07-01), Richmond et al.
patent: 3480885 (1969-11-01), Schrank
patent: 3806822 (1974-04-01), Meyer et al.

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