A Wideband Low-Profile Folded Transmitarray Antenna Based on Magnetoelectric Dipole Elements

被引:4
作者
Xiang, Bing-Jie [1 ,2 ,3 ]
Luk, Kwai-Man [1 ,2 ,3 ]
机构
[1] City Univ Hong Kong, State Key Lab Terahertz & Millimeter Waves, Hong Kong 518057, Peoples R China
[2] City Univ Hong Kong, Dept Elect Engn, Hong Kong 518057, Peoples R China
[3] City Univ Hong Kong Shenzhen Res Inst, Shenzhen, Peoples R China
基金
中国国家自然科学基金;
关键词
Folded; high gain; low profile; magnetoelectric (ME) dipole antenna; transmitarray (TA) antenna; wideband; CIRCULARLY-POLARIZED TRANSMITARRAY;
D O I
10.1109/TAP.2023.3307280
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A wideband folded transmitarray (TA) antenna with a low profile is proposed by combing a TA aperture and a reflective polarization-conversion surface (RPCS). The TA aperture transforms the spherical wave into the planar wave, and the phase-gradient RPCS generates a virtual feed to reduce the profile. Both the TA and RPCS elements are proposed based on the magnetoelectric (ME) dipole antenna and the true-time-delay (TTD) structure. To verify the performance of the low-profile TA antenna, a prototype operating at 27 GHz is designed, fabricated, and measured. The proposed wideband TA antenna can achieve a peak gain of 25.3 dBi and a peak aperture efficiency of 40%. The achieved 1- and 3-dB gain bandwidths are 10% and 29%, respectively. The profile is reduced to 1/5 of the focal length. All these advantages make the proposed TA antenna a promising candidate for point-to-point wireless communication.
引用
收藏
页码:8659 / 8667
页数:9
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