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This paper presents a method to calculate phased array antenna diffraction field which based on superposition principle and UTD. By calculating the diffraction field of each array element, the total diffracted field of the phased array antenna can be obtained. The method of this paper tries to avoid a full-wave split, so it can be quick and effective.
Based on the structure and characteristics of the frequency-scan antenna, the near-field computational model is constructed. The array element's phases are presented firstly and the radiation power of each array element is speculated according to the antenna aperture distribution. On the basis of the phase and power, the equation of radiation fields of each array element is obtained. According to...
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