Effects of random errors on the radiation pattern of cylindrical array antenna

Random errors of conformal array antenna effectively affect the radiation pattern and reduce the antenna directivity. In this paper, the excitation phase quantization error, random excitation amplitude and phase errors, the failure of element are studied by theoretical calculation and simulation. In order to analyze the effects on random errors of conformal array antenna, pattern synthesis modal of cylindrical array antenna in the far field are proposed firstly. The mean and variance of radiation pattern under these random errors are formulated with different error probability distribution. Moreover, we evaluate direction pattern of different excitation amplitude and phase random errors on cylindrical array antenna. The maximum radiation power under different failure probability is also discussed. Results indicate that various errors will have the side lobe level increasing with the different degrees.