An array of two periodic leaky-wave antennas with sum and difference beam scanning for application in target detection and tracking  

作　　者：Mianfeng HUANG Juhua LIU 

机构地区：[1]School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China [2]Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems,Sun Yat-sen University,Guangzhou 510006,Chin

出　　处：《Frontiers of Information Technology & Electronic Engineering》2023年第4期567-581,共15页信息与电子工程前沿（英文版）

基　　金：Project supported in part by the National Natural Science Foundation of China(No.62171480);in part by the Guangdong Basic and Applied Basic Research Foundation,China(No.2020B1515020053)。

摘　　要：An array of two substrate-integrated waveguide(SIW) periodic leaky-wave antennas(LWAs) with sum and difference beam scanning is proposed for application in target detection and tracking. The array is composed of two periodic LWAs with different periods, in which each LWA generates a narrow beam through the n=-1 space harmonic. Due to the two different periods for the two LWAs, two beams with two different directions can be realized, which can be combined into a sum beam when the array is fed in phase or into a difference beam when the array is fed 180?out of phase. The array integrated with 180?hybrid is designed, fabricated, and measured.Measurement results show that the sum beam can reach a gain up to 15.9 dBi and scan from-33.4?to 20.8?. In the scanning range, the direction of the null in the difference beam is consistent with the direction of the sum beam,with the lowest null depth of-40.8 dB. With the excellent performance, the antenna provides an alternative solution with low complexity and low cost for target detection and tracking.

关 键 词：ANTENNA Leaky-wave antenna(LWA) Substrate-integrated waveguide(SIW) Sum and difference beam Target detection and tracking 

分 类 号：TN820[电子电信—信息与通信工程] TP391.41[自动化与计算机技术—计算机应用技术]