基于FSS的双频高增益微带天线  

A Dual-Band and High-Gain Microstrip Antenna Based on FSS

作　　者：郑月军[1] 高军[1] 曹祥玉[1] 袁子东[1] 杨欢欢[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《微波学报》2014年第5期54-58,共5页Journal of Microwaves

基　　金：国家自然科学基金(61271100);陕西省自然基金(2012JM8003)

摘　　要：设计并制作了一种基于双屏FSS(Frequency Selective Surface)部分反射表面的双频高增益微带天线。该FSS结构是在介质板上下表面分别刻蚀两条方环形金属带,通过调节金属带的宽度,实现频比(Frequency Ratio,FR)达到2的双频谐振,且在5.12~5.31GHz和10.08~10.84GHz频带内反射相位曲线斜率为正(一般的为负),反射系数模值都在0.86和0.82以上。将FSS以覆层的形式放置于双频微带天线上方,相当于增加了双频天线的辐射口径面积,有效改善天线的辐射性能。仿真和实测结果表明:与原始双频微带天线相比,加载双频FSS覆层后,新天线的增益得到了提高,在5.22GHz和10.43GHz处,天线鼻锥方向增益分别提高了4.8dB和5.1dB。A dual-band and high-gain microstrip antenna based on double screen FSS( Frequency Selective Surfaces)partially reflective surfaces is designed and fabricated. The FSS structure is constructed by printing two annular square patches on both sides of the surface respectively. Changing the dimenson of each annular strip patch to achieve dual-band resonances with FR( Frequency Ratio) to 2,positive reflection phase gradients( the general is with negative reflection phase gradients) and the reflection magnitude above 0. 86 and 0. 82 respectively in 5. 12 ~ 5. 31 GHz and 10. 08 ~ 10. 84 GHz. The radiation caliber of microstrip is increased by using FSS as the radome of dual-band microstrip antenna so that the radiation performance is effectively improved. The simulated and measured results show that: comparing to primary antenna,the gain of the antenna with FSS radome is increased by 4. 8 dB and 5. 1 dB at 5. 22 GHz and 10. 43 GHz respectively。

关 键 词：频率选择表面(FSS) 正反射相位斜率 双频 高增益 微带天线 

分 类 号：TN822[电子电信—信息与通信工程]