A Planar 4-Bit Reconfigurable Antenna Array Based on the Design Philosophy of Information Metasurfaces  

作　　者：Zheng Xing Wang Hanqing Yang Ruiwen Shao Jun Wei Wu Guobiao Liu Feng Zhai Qiang Cheng Tie Jun Cui 

机构地区：[1]State Key Laboratory of Millimeter Waves,School of Information Science and Engineering,Southeast University,Nanjing 210096,China [2]The Institute of Electromagnetic Space,Southeast University,Nanjing 210096,China

出　　处：《Engineering》2022年第10期64-74,共11页工程（英文）

基　　金：supported in part by the National Key Research and Development Program of China(2017YFA0700201,2017YFA0700202,and 2017YFA0700203);the National Natural Science Foundation of China(61631007,61571117,61138001,61371035,61722106,61731010,11227904,and 62171124);the 111 Project(111-2-05);the Scientific Research Foundation of Graduate School of Southeast University(YBYP2119)。

摘　　要：Inspired by the design philosophy of information metasurfaces based on the digital coding concept,a planar 4-bit reconfigurable antenna array with low profile of 0.15λ0(whereλ0is the free-space wavelength)is presented.The array is based on a digital coding radiation element consisting of a 1-bit magnetoelectric(ME)dipole and a miniaturized reflection-type phase shifter(RTPS).The proposed 1-bit ME dipole can provide two digital states of"0"and"1"(with 0°and 180°phase responses)over a wide frequency band by individually exciting its two symmetrical feeding ports.The designed RTPS is able to realize a relative phase shift of 173°.By digitally quantizing its phase in the range of 157.5°,additional eight digital states at intervals of 22.5°are obtained.To achieve low sidelobe levels,a 1:16 power divider based on the Taylor line source method is employed to feed the array,A prototype of the proposed 4-bit antenna array has been fabricated and tested,and the experimental results are in good agreement with the simulations.Scanning beams within a±45°range were measured with a maximum realized gain of 13.4 dBi at12 GHz.The sidelobe and cross-polarization levels are below-14.3 and-23.0 dB,respectively.Furthermore,the beam pointing error is within 0.8°,and the 3 dB gain bandwidth of the broadside beam is 25%.Due to its outstanding performance,the array holds potential for significant applications in radar and wireless communication systems.

关 键 词：4-bit reconfigurable antenna array Information metasurface Digital coding method Low sidelobe Low profile 

分 类 号：TN820.15[电子电信—信息与通信工程]