طراحی آنتن میکرواستریپ با شکاف U شکل و تغذیه تزویج مجاورتی جهت کاربرد در آنتن رادار روزنه مصنوعی

In this paper, the design and simulation of an antenna for SAR applications, with specified imaging characteristics, is proposed. The antenna should represent a wideband impedance bandwidth and also a high gain; so the design of a microstrip array antenna with proximity coupling feed and U-shaped slot patch is considered. First, the main design parameters of such an antenna element are recognized by parametric study. Then the antenna element, with more than 16% impedance bandwidth, is designed, and the simulation results are presented and compared with measurement results. Finally, a preliminary design for the planar array is theoretically proposed regarding to the dimensions and the current distribution, which complies with the desired antenna characteristics.