Accession Number : AD0164915

Title :   Apparatus for Detecting Natural Nonlinearities in Antennas.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Elsner,Raymond F. ; Husty,James J. ; Tumarkin,Sam

Report Date : 17 APR 1973

Pagination or Media Count : 4

Abstract : The patent describes a method for determining whether an antenna possesses natural nonlinearities by detecting and classifying radio frequency interference sources existing in the antenna. An alternating current at frequency F1 is passed through a suspected nonlinearity to thereby create F1 harmonic signals. The suspected nonlinearity is then exposed to mechanical forces at frequency F2 by means of a vibrator to cause F1 and F2 to interact and generate intermodulation product signals. Detection of these intermodulation product signals indicates the presence of natural nonlinearities in the antenna.

Descriptors :   *Antennas, *Patents, Test equipment, Nonlinear systems, Radiofrequency interference

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE