V.A. Ufaev – Dr. Sc. (Eng.), Senior Research Scientist, Leading Research Scientist, 

MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh) E-mail: andreyuff@mail.ru

Based on known rules the limiting radius array definition is assigned. It means maximum value of radius arrays, which allows to provide given level of mean square error(MSE) and anomalous errors probability.

The critical parameters evaluation technique is offered, according to which requested signal/noise ratio(SNR) is considered in dependence on arrays radius and given MSE. Varying these parameters, anomalous error probability is estimated and the set of parameters corresponding to its equality to given level is found.

The arrays with uniform step three types MSE calculation formulas are obtained by linearization method. The limiting parameters are estimated by simulation.

It’s established, that when MSE and anomalous error probability have been given the arrays radius increase and corresponding SNR decrease with direction finding sensitivity maximum maintenance take place.

Limiting sensitivity of linear arrays systems are won by the other variants. Two ring structures are more preferable when the antennas numbers are 6 and 10. The limiting sensitivities of different arrays types become more equal, limiting radius slowly increases. Varying of the antennas number from 7 to 256 gives 10% increase. False alarm probability decrease is achieved by limiting radius decrease and limiting SNR increase. When the admissible direction finding MSE decreases, the limiting radius and limiting SNR in less degree simultaneously increases. Transmission to two-dimensional direction finding is accompanied by limiting sensitivity decrease to 20%.

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