Accession Number : ADD008503

Title :   Adaptive Steerable Null Antenna Processor.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Roberts,Eugene L

Report Date : 02 Jan 1981

Pagination or Media Count : 58

Abstract : An object of the invention is to provide a steerable null antenna processor, in which the null developed during reception is also maintained during transmission. According to the invention, a receive-transmit steerable null antenna processor includes incrementally adjustable delay lines and a variable ratio power network (amplitude balance control) for adjusting the relative phase and amplitude in two or more antenna branches to steer a null on an interference source. A digital controller compares a signal which includes a representation of the interference level to a previously sampled value to note improvement or not and adjusts the delay lines and amplitude balance accordingly. (Author)

Descriptors :   *Patent applications, *Directional antennas, *Adaptive systems, *Signal processing, Digital systems, Delay lines, Processing equipment, Nulls(Amplitude), Variables, Steering, Inventions, Sources, Balance, Control, Ratios, Interference, Sampling, Balance, Power, Antennas, Value, Amplitude, Networks

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE