Accession Number : ADD001027

Title :   Isolimiter.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : McGowan,Joseph W

Report Date : 25 Sep 1973

Pagination or Media Count : 5

Abstract : The patent describes a ferrite isolator combined with a ferrite-varactor limiter waveguide section to absorb reflected power without affecting microwave power signals incident to the ferrite limiter. A single magnet biases the ferrite limiter to subsidiary resonance and the ferrite isolator to main resonance. The combined isolator-limiter or isolimiter is used in a dual antenna radar system having a switched four-port circulator so that a signal from the transmitter is directed by the circulator to the selected one of the two antennas and radiated signal energy that is reflected back from the selected antenna is directed by the circulator through the isolimiter to the receiver where any spikes reflected by the varactor-limiter are absorbed by the isolator whereby varactor reflected spikes do not reach the other of the two antennas. The isolimiter affords receiver protection and isolation in one unit no larger than the limiter.

Descriptors :   *Limiters, *Attenuators, *Patents, Ferrites, Microwave equipment, Radar equipment

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE