Patent ID: 8736485

Claim:
A method for direction finding by means of monopulse formation in a radar system with electronically controlled group antenna and analog beam shaping of sum and difference channels, the method comprising: performing a self-test of the antenna to identify failed receiving elements, and a result of the self-test goes directly into the monopulse formation and said test is thereby error corrected; converting the result of the self-test into correction values (C, μ x , μ y ) that, independently of the antenna viewing direction, are combined as follows with those from the sum channel signal (Σ) and the difference channel signals (Δ x ,Δ y ) of the antenna: ( δ ⁢ ⁢ u corr δ ⁢ ⁢ v corr ) = C · ( arctan ⁡ ( Im ⁢ { Δ x E } ) - μ x arctan ⁡ ( Im ⁢ { Δ ⁢ ⁢ y E } ) - μ y ) , δu corr and δv corr being the corrected bearing values.