METHOD OF EVALUATING EFFICIENCY OF RANDOM ANTENNA Russian patent published in 2009 - IPC G01R29/08 

FIELD: physics.

SUBSTANCE: invention can be used for determining parametres of radio engineering systems, unified by the term "random antennae") (RA). Method of evaluating efficiency of a random antenna involves effect of electromagnetic radiation of an auxiliary transmitter at frequency f_a, on a random antenna which is emitting a signal with frequency f_c; determination of frequencies of intermodulation components of radiation of the random antenna f_i=|mf_c±nf_a\, where m=1; 2; 3…; n=1; 2; 3… . A (N+1)-channel reception circuit at frequencies f_c and f_i is used; i [1; N] with a terminal device, connected to the (N+1)-channel reception circuit, which determines error probability of single reception P_1er at frequency f_c and error probability in an N-fold diversity reception circuit at N frequencies f_i and calculates value of efficiency evaluation criterion of the random antenna S_e=(1-P_Ner)/(1-P_1er).

EFFECT: increased accuracy and reliability of evaluating complex parameters of random antennae, related to all N leakage channels potentially possible in the antenna, through evaluation of noise immunity of receiving leakage signals of the leakage channel on all N channels at the same time using a system of N-channel diversity reception, increased efficiency of determining parameters of random antennae due to possibility of automation of the process.

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