S/C波段低剖面圆极化共口径天线  

S/C Band Low Profile Circularly Polarized Shared-Aperture Antenna

作　　者：李建峰 王野[1] 孙保华[2] 王海鹏[2] 张闻涛[3] 王鹏飞[3] Li Jianfeng;Wang Ye;Sun Baohua;Wang Haipeng;Zhang Wentao;Wang Pengfei(Lishui University,Lishui 323000,China;Xidian University,Xi’an 710071,China;China Airborne Missile Academy,Luoyang 471009,China)

机构地区：[1]丽水学院,浙江丽水323000 [2]西安电子科技大学,西安710071 [3]中国空空导弹研究院,河南洛阳471009

出　　处：《航空兵器》2022年第5期114-118,共5页Aero Weaponry

基　　金：航空科学基金项目(20200001081007)。

摘　　要：作为弹载系统发射和接收电磁波的装置,弹载天线的功能日益丰富,设计的共口径天线可以提高导弹导引部的口径利用率,同时有效避免天线间的辐射干扰。本文以导弹导引天线为应用背景,基于微带圆极化天线理论,高频C波段部分对矩形微带天线采用顺序旋转馈电技术,低频S波段部分对十字微带天线采用正交双馈技术,采用嵌套式的共口径天线结构,实现共口径天线设计。仿真及实验结果表明,天线整体尺寸为63 mm×63 mm×1.574 mm,在4.87~5.13 GHz和2.49~2.51 GHz频段内回波反射系数小于-10 dB,高频天线的相对带宽为8.1%,低频天线的相对带宽为0.4%。两天线在中心频率处最大辐射方向的轴比均小于3 dB。实验数据表明设计应用于弹载天线导引部的共口径天线可以明显提高导引部的口径利用率,同时有效消除由互耦导致的各天线辐射特性的恶化。As a device for missile-borne system to transmit and receive electromagnetic waves,the functions of missile-borne antenna are becoming more and more abundant.The shared-aperture antenna can improve the aperture utilization rate of missile seeker and can avoid radiation interference between antennas.This paper proposes a low profile circularly polarized shared-aperture antenna for missile seeker antenna based on the theory of microstrip circular polari-zed antenna.More specifically,the sequential rotation feed technology is adopted for the rectangular microstrip antenna in the high-frequency C-band part,while the orthogonal double feed technology is adopted for the cross microstrip antenna in the low-frequency S-band part.The nested shared-aperture antenna structure is adopted to realize the design of shared aperture antenna of 63 mm×63 mm×1.574 mm.The reflection coefficient is less than-10 dB in the frequency bands of 4.87~5.13 GHz and 2.49~2.51 GHz.The relative bandwidth of high-frequency antenna is 8.1%and that of low-frequency antenna is 0.4%.The axial ratio of the two antennas in the maximum radiation direction at the center frequency is less than 3 dB.The experimental data show that the shared-aperture antenna designed and applied to the missile-borne antennacan significantly improve the aperture utilization of the missile seeker,and can also eliminate the deterioration of the radiation performances caused by the mutual coupling of antennas.

关 键 词：圆极化 共口径 双频 低剖面 微带天线 电磁波 弹载系统 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程]