电波科学学报2024，Vol.39Issue(6)：1073-1082,10.DOI:10.12265/j.cjors.2023342
一种面向卫星通信的共口径双频双圆极化介质谐振器天线
A shared-aperture dual-band dual-circularly polarized dielectric resonator antenna for satellite communication
摘要
Abstract
An aperture-shared dual-band dual-circularly polarized dielectric resonator antenna(DRA)is proposed for ground terminals in response to the demand for high-speed frequency division duplex communication in satellite internet.By embedding the high-frequency cylindrical dielectric resonators into the low-frequency annular cylindrical dielectric resonators,the aperture-shared function is achieved.Using the dual-probe method to excite the degenerate mode inside the dielectric resonator,orthogonal circularly polarized waves are generated at low and high frequencies by controlling the phase difference between the degenerate modes.In order to weaken the electromagnetic coupling between different frequencies,the thickness of the circular cylindrical dielectric resonator is optimized to effectively solve the problem of low-frequency pattern distortion and improve impedance matching.Furthermore,a 2×2 antenna array is established based on the sequential rotation method,and a prototype is manufactured and measured.The results show that the operating bandwidth of low-frequency left-hand circular polarization(LHCP)is 25.5%(14.4-18.6 GHz),and high-frequency right-hand circular polarization(RHCP)is 6.5%(26.8-28.6 GHz).The miniaturization characteristics and stable radiation performance of this aperture-shared antenna can be applied to satellite communication equipment such as in vehicle and airborne systems.关键词
卫星通信/介质谐振器天线(DRA)/双频/双圆极化/共口径Key words
satellite communication/dielectric resonator antenna(DRA)/dual-band/dual-circularly polarized/aperture-shared分类
信息技术与安全科学引用本文复制引用
罗伟,幸运颉,刘梅林,何鑫..一种面向卫星通信的共口径双频双圆极化介质谐振器天线[J].电波科学学报,2024,39(6):1073-1082,10.基金项目
中国博士后科学基金(2022MD723726) （2022MD723726）
