An ISGW Filtering Antenna with Spurious Modes and Surface Wave Suppression for Millimeter Wave Communications  

作　　者：Lihui Wang Dongya Shen Qiuhua Lin Zhiyong Luo Wenjian Wang Jianpei Chen Zhao Gao Wei Zhang 

机构地区：[1]School of Electronics and Communication Engineering,Sun Yat-sen University,Shenzhen 518107,China [2]School of Information Science and Engineering,Yunnan University,Kunming 650091,China [3]Kuang-Chi Institute of Advanced Technology&State Key Laboratory of Meta-RF Electromagnetic Modulation Technology,Shenzhen,China [4]School of Electrics and Information Engineering,Yunnan Minzu University,Kunming,China [5]Institute of Telecommunication and Navigation Satellites,China Academy of Space Technology,Beijing 100094

出　　处：《China Communications》2023年第11期1-12,共12页中国通信（英文版）

基　　金：This work was supported by the National Key research and development program of China(No.2021YFB 2900401);the national natural science foundation of China(No.62361057,No.61861046);the key natural science foundation of Shenzhen(No.JCYJ20220818102209020);the key research and development program of Shenzhen(No.ZDSYS20210623091807023).

摘　　要：In this paper,an integrated substrate gap waveguide(ISGW)filtering antenna is proposed at millimeter wave band,whose surface wave and spurious modes are simultaneously suppressed.A secondorder filtering response is obtained through a coupling feeding scheme using one uniform impedance resonator(UIR)and two stepped-impedance resonators(SIRs).To increase the stopband width of the antenna,the spurious modes are suppressed by selecting the appropriate sizes of the ISGW unit cell.Furthermore,the ISGW is implemented to improve the radiation performance of the antenna by alleviating the propagation of surface wave.And an equivalent circuit is investigated to reveal the working principle of ISGW.To demonstrate this methodology,an ISGW filtering antenna operating at a center frequency of 25 GHz is designed,fabricated,and measured.The results show that the antenna achieves a stopband width of 1.6f0(center frequency),an out-of-band suppression level of 21 dB,and a peak realized gain of 8.5 dBi.

关 键 词：filtering antenna integrated substrate gap waveguide millimeter wave communications spurious modes suppression surface wave suppression 

分 类 号：TN928[电子电信—通信与信息系统] TN820[电子电信—信息与通信工程]