Bearing Accuracy Improvement of the Amplitude Comparison Direction Finding Equipment by Analyzing the Error

Direction finder, an important component of electronic warfare system, is a device that detects electromagnetic waves radiated from target radar and measures its angle of arrival. Compared to the phase-comparison method, the amplitudecomparison method has simpler system, and it’s easy to miniaturize; however, relatively, its direction finding is less accurate, and it has various factors that occur errors. This paper suggests improving for the DF accuracy of the amplitudecomparison method base on analysis of error type and cause. Also, this paper proves the usefulness of the result through the test that we suggest for the polarization error that has the greatest effect on the amplitude-comparison method’s DF accuracy.