Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure  

作　　者：Guo-Cheng Wu Guang-Ming Wang Xiao-Long Fu Jian-Gang Liang Wei-Xiong Bai 吴国成;王光明;付孝龙;梁建刚;白渭雄(Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China)

机构地区：Air and Missile Defense College, Air Force Engineering University, Xi＇an 710051, China

出　　处：《Chinese Physics B》2017年第2期200-205,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61372034)

摘　　要：In this paper, we first propose a metamaterial structure by etching the same two interdigital fingers on the upper ground of quarter mode substrate integrated waveguide（QMSIW）. The simulated results show that the proposed QMSIWbased metamaterial has a continuous phase constant changing from negative to positive values within its passband. A periodic leaky-wave antenna（LWA）, which consists of 11 QMSIW-based metamaterial unit cells, is designed, fabricated,and measured. The measured results show that the fabricated antenna achieves a continuous beam scanning property from backward-43° to forward ＋32° over an operating frequencyrange of 8.9 GHz–11.8 GHz with return loss better than 10 d B.The measured antenna gain keeps consistent with the variation of less than 2 d B over the operating frequency range with a maximum gain of 12 d B. Besides, the measured and simulated results are in good agreement with each other, indicating the significance and effectiveness of this method.In this paper, we first propose a metamaterial structure by etching the same two interdigital fingers on the upper ground of quarter mode substrate integrated waveguide（QMSIW）. The simulated results show that the proposed QMSIWbased metamaterial has a continuous phase constant changing from negative to positive values within its passband. A periodic leaky-wave antenna（LWA）, which consists of 11 QMSIW-based metamaterial unit cells, is designed, fabricated,and measured. The measured results show that the fabricated antenna achieves a continuous beam scanning property from backward-43° to forward ＋32° over an operating frequencyrange of 8.9 GHz–11.8 GHz with return loss better than 10 d B.The measured antenna gain keeps consistent with the variation of less than 2 d B over the operating frequency range with a maximum gain of 12 d B. Besides, the measured and simulated results are in good agreement with each other, indicating the significance and effectiveness of this method.

关 键 词：metamaterial leaky-wave antenna quarter mode substrate integrated waveguide（QMSIW） continuous beam scanning property 

分 类 号：TN822.6[电子电信—信息与通信工程]