Undesired signal canceller

Details Undesired signal canceller Undesired signal canceller

1980-11-06

1983-07-26

Richardson, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455279, 455284, 455286, 343854, H04B 118

Patent

active

043957781

ABSTRACT:
Apparatus for cancelling undesired signals for a radient energy receiver having first and second antennas which are spaced a distance apart and including a phase compensation circuit connected to one of the antennas and a variable phase shift circuit connected to the second antenna with the variable phase shift circuit comprising a plurality of series connected inductors wherein adjacent inductors are magnetically coupled together and a plurality of voltage variable capacitors with adjacent ones of the voltage variable capacitors connected between ground and the junction points between adjacent ones of the series connected inductors and adding means connected to the outputs of the phase compensation circuit and the variable phase shift circuit and means for supplying a variable DC voltage to the variable voltage capacitors to control their capacitance.

REFERENCES:
patent: 1697945 (1929-01-01), Beverage
patent: 2130485 (1938-09-01), Feldman et al.
patent: 2226836 (1940-12-01), Sinninger
patent: 2271909 (1942-02-01), Beverage
patent: 2617927 (1952-11-01), Cohen
patent: 2650297 (1953-08-01), Damron
patent: 4100496 (1978-07-01), Akiyoshi et al.
patent: 4160952 (1979-07-01), Seastrand

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