Abstract
Uniform microwave field (UMF) has increasing applications in microwave industries and electromagnetic measurements. In this work, we propose an analytical method to synthesize UMFs based on the Fourier transform (FT) and time reversal (TR) technique. FT is used to analytically obtain the excitation amplitudes for the antenna elements of TR mirror (TRM). TR is applied to compensate for their excitation phases so that all the TR signals radiated from the TRM antennas arrive at the target zone without phase difference. TRM is an antenna array of each antenna element with the TR processing ability, which is designed for UMF generation. Thanks to the analytical property, the proposed method provides a new efficient way to achieve the UMFs. Full-wave simulations demonstrate the validity and accuracy of this method. Some critical factors that may affect the 3 dB field width, phase deviation, and amplitude ripples of the UMFs are studied.
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