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Based on characteristic mode analysis (CMA), a novel method for reshaping the TM00 mode of the rectangular patch antenna (RPA) is presented. Initially, the RPA loaded by periodic shorting vias, as the basic structure for generating the TM00 mode, is investigated by CMA. The nonbroadside pattern of TM00 mode is revealed to be caused by the vertical currents on the shorting vias. And it can be transformed...
The improved nonlinear least‐square method is introduced into the synthesis of subarrayed planar array. This method changes the traditional least‐square method's shortness of being sensitive to its initial conditions. The whole antenna aperture is divided into several subarrays and the excitation amplitude of each subarray is optimized. This can reduce the cost and complexity of the antenna array...
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