双频频率选择表面及其在微带天线宽带RCS减缩中的应用  

Dualband Frequncey Selective Surface and Its Application to Wideband RCS Reduction of The Microstrip Antenna

作　　者：周禹龙 曹祥玉[1] 高军[1] 郑月军[1] 张晨[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《电子与信息学报》2017年第6期1446-1451,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61271100;61471389;61501494;61671464)~~

摘　　要：该文设计了一种风车形双频带阻型频率选择表面(FSS),并将其加载到双频微带天线地板,实现宽带雷达散射截面(RCS)减缩。风车形FSS每一角都由两个相差90°的半方环组成,通过电偶极子谐振和风车FSS高次模谐振实现双频阻带。仿真和实测结果表明,将该FSS单元加载到双频微带天线地板后,在5.20 GHz处,天线E面、H面前向增益基本保持不变;在10.41 GHz处,天线E面、H面前向增益提高了1.8 dBi;同时,天线单站RCS在1.0~16.8 GHz宽带内减缩效果明显,其中x极化波下最大缩减量达到28.3 dB,y极化波下最大减缩量达到36.2 dB。A dual stop band Frequency Selective Surface （FSS） in windmill-liked shape is proposed, which achieves wide Rader Cross Section （RCS） reduction by applying FSS on the ground of the dualband microstrip antenna. Each corner of the FSS is formed by combining two semi-suqares which have 90° of rotation between each semi-square. The dual stop bands are the results of the resonance of the electric dipole and the higher order mode effect. The simulation and measurement results show that the gain of E plane and H plane at 5.20 GHz is maintained, while the gain of E plane and H plane at 10.41 GHz are increased by 1.8 dBi, simultaneously. The antenna＇s monostatic RCS reduction is obviously observed in a wide frequency band ranging from 1.0 GHz to 16.8 GHz. What＇s more, the maximum value is 28.3 dB under × polarization and 36.2 dB under y polarization, respectively.

关 键 词：微带天线 双频段 频率选择表面 宽带RCS减缩 

分 类 号：TN823[电子电信—信息与通信工程]