Abstract: The RCS of aircraft at different bistatic radar angles is gained to investigate the electromagnetism scattering characteristic of the multi-station and bistatic radar.This method uses an efficient method for revolving the target and fixing bistatic radar angle to avoid multiple picketage. Three bistatic RCS characteristics, which are symmetry, similarity and weak coupling, are found by comparing the target RCS with different bistatic radar angles. Some results are obtained as follows: stealth technology of monostatic radar could realize the stealth purpose by changing the electromagnetism scattering space distribution and making the intense wave crest go out of the important detect region, while techology of bistatic radar that intercepts the intense wave crest which is out of the important detect region is mainly used to meet the anti-stealth requirement.Both of the main threatening bistatic radar angles and the entire intense wave crest should be considered to estimate the target bistatic stealth characteristic.

Key words: aircraft, stealth, electromagnetic scattering