Array antenna nearfield diagnosis technique based on pattern multiplication theorem

This paper introduce Array antenna nearfield diagnosis technique based on pattern multiplication theorem. Simulation results show that with nearfield measurement error(Uniformly distribution: -0.5dB~0.5dB, -5°~5°), diagnosis accuracy of this technique can be quantified to Amplitude:0.5dB, Phase ±5°. Prove that this method is practical. In this way, a powerful diagnosis tool is made available to the array antenna designer.