Blindness-free beam scanning antenna with array of array architecture:principle,design,and experiment  

作　　者：Jianxu SUN Yujian CHENG 

机构地区：[1]School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Science China(Information Sciences)》2024年第3期205-220,共16页中国科学（信息科学）（英文版）

基　　金：supported in part by National Key Research and Development Plan of China (Grant No.2020YFB1807404)。

摘　　要：This paper presents a 66–76-GHz sparsely-excited phased array antenna with the array of array(AoA)architecture for eliminating the blindness and suppressing the grating lobe when scanning.For the array antennas printed on the thick dielectric layers with high relative permittivity,scanning blindness appears and seriously impacts the radiation performance.To address this issue,the Ao A topology is developed first.It finds that the scanning blindness appears due to the coupling of the radiating Floquet modes to the non-radiating surface wave(SW)modes.Therefore,the array is divided into two types of domino subarrays.The inner-phase distributions are introduced into the domino subarrays to break the one-to-one relationship between the Floquet mode and the SW mode.Then,the blindness inside±60°scanning volume is eliminated by the aperiodic subarrays.Meanwhile,the aperiodic inner-phase distributions enhance the aperiodicity of the array and contribute to suppressing the grating lobe when scanning.Next,the meta-surface-based dipole with the shorted post is chosen as the unit cell for the proposed aperiodic array.Based on these methods,the array achieves the wide-scanning performance of±60°in the E-plane and±30°in the H-plane,without the blindness and the grating lobe.Finally,the 16×16 array is built and simulated with the dimension of32 mm×32 mm.At the highest operating frequency,the simulated gains are 28.42,25.17,and 24.01 d Bi when scanning to the broadside,50°in the E-plane,and 30°in the H-plane,respectively.Compared to the ideal gain,it shows that the simulated radiation efficiency is about 84.13%,62.08%,and 35.23%when scanning to the broadside,50°in the E-plane,and 30°in the H-plane,respectively.The worst transmission coefficient,i.e.,the worst isolation,is-11.97 d B between the central element and its two adjacent elements in the E-plane.The array prototypes are fabricated,and the experiments are carried out to verify the correctness of the principle and design.Compared to existing antenna array desi

关 键 词：6G communication systems phased array AOA aperiodic subarray wideband wide-scanning SURFACE-WAVE scanning blindness grating lobe 

分 类 号：TN929.5[电子电信—通信与信息系统] TN820[电子电信—信息与通信工程]