Phased array feed system

Details Phased array feed system Phased array feed system

1980-12-18

1983-07-19

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

331132, H04B 700

Patent

active

043946607

ABSTRACT:
A combined phase shifter and signal source are formed by injection locking a variable frequency oscillator. The free running frequency control of the oscillator operates as a phase control when the oscillator is injection locked. The invention functions as a phase shifter which exhibits gain, permitting its use in a unique phased array antenna system.

REFERENCES:
patent: 3020493 (1962-02-01), Carroll
patent: 3653046 (1972-03-01), Glance
patent: 3766558 (1973-10-01), Kuechken
patent: 3798645 (1974-03-01), Baurle et al.
patent: 3832713 (1974-08-01), Rubin
patent: 4314250 (1982-02-01), Hanell et al.
"Thin-Film Injection-Locked Oscillators and Negative-Resistance Amplifiers for 2-GH.sub.3 Radio Repeater", by Ernesto Marazzi et al., IEEE Journal of Solid-State Circuits, Feb. 1972, S26150002, pp. 23-32.
"Wide-Band Phase Locking and Phase Shifting Using Feedback Control of Oscillators", by David Rubin, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-20, No. 4, Apr. 1972, pp. 286-289.
"A Study of Locking Phenomena in Oscillators", by Robert Adler, Proceedings of the IRE and Waves and Electrons, 1946, pp. 351-357.

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