Broadband adjustable phase modulation circuit

Details Broadband adjustable phase modulation circuit Broadband adjustable phase modulation circuit

1983-03-28

1985-10-22

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

333156, 333164, 330124R, 330295, 330277, 330278, 330 53, 330286, H03C 300

Patent

active

045491526

ABSTRACT:
A phase modulation circuit to provide at an output terminal an output signal controllably shifted from 0.degree. to 360.degree. relative to an input signal provided at an input terminal includes a first 90.degree. coupler connected between the input terminal and second and third 90.degree. couplers, four gain controllable amplifiers, fourth and fifth 90.degree. couplers and an in phase combiner with its output connected to the output terminal. Two of the amplifiers are connected between the second and fourth couplers. The additional amplifiers are connected between the third and fifth couplers. The fourth and fifth couplers are connected to the inputs of the in-phase combiner. The gain through the various amplifiers is adjusted to control the amount of phase shift through the circuit.

REFERENCES:
patent: 3403357 (1968-09-01), Rosen et al.
patent: 3423688 (1969-01-01), Seidel
patent: 3571739 (1971-03-01), Seidel
patent: 3740756 (1973-06-01), Sosin
patent: 3988705 (1976-10-01), Drapac
patent: 4061984 (1977-12-01), Zirwas
patent: 4161705 (1979-07-01), Nemit et al.
patent: 4297641 (1981-10-01), Sterzer
patent: 4311965 (1982-01-01), Jones
patent: 4398161 (1983-08-01), Lamb et al.
U. S. Patent Application, Serial No. 249,609, "Hybrid Power Divider/Combiner Circuit".
"Broad-Band Active Phase Shifter Using Dual-Gate MESFET" by M. Kumar, et al., reprint from IEEE Transactions on Microwave Theory and Techniques, vol. MTT-29, No. 10, Oct. 1981.

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