中图分类号： TN82 文献标识码： A DOI：10.16157/j.issn.0258-7998.212186 中文引用格式： 隋涛，邢斯瑞，孙伟，等. 星载L波段宽带高增益圆极化微带天线设计[J].电子技术应用，2022，48(1)：138-141，151. 英文引用格式： Sui Tao，Xing Sirui，Sun Wei，et al. Design of L-band wideband high-gain circularly-polarized microstrip antenna for satellite communication system[J]. Application of Electronic Technique，2022，48(1)：138-141，151.
Design of L-band wideband high-gain circularly-polarized microstrip antenna for satellite communication system
Abstract： In response to the requirements of satellite L-band communication and forwarding systems, a novel type of satellite-borne L-band broadband high-gain circularly polarized microstrip antenna is designed. The microstrip antenna adopts a side-fed feeding method as a whole, adopts an H-shaped slot coupling feeding method to achieve a wide frequency band, and uses a Wilkinson phase shift power splitter to achieve the phase difference between the two signals to meet the circular polarization, and add the antenna back reflector and foam layer between the boards to increase gain and stabilize the structure. Through the analysis of electromagnetic simulation software, it can be obtained that the gain is 8.3 dBi at the center frequency point of 1.45 GHz, the axial ratio is 0.7 dB, the relative bandwidth is 23.5% when the gain is greater than 7.5 dBi and the return loss is less than -10 dB. The actual measurement results of the antenna processing are basically consistent with the simulation results, which have certain guiding significance for the design of the L-band wireless communication system.
Key words : slot-coupled feed；wideband；high-gain；circularly-polarized；microstrip antenna