A Hybrid-Element Approach to Design Wideband ME-Dipole Transmitarray with Improved Aperture Efficiency

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1338-1342
Journal / PublicationIEEE Antennas and Wireless Propagation Letters
Volume21
Issue number7
Online published13 Apr 2022
Publication statusPublished - Jul 2022

Abstract

In this letter, a wideband efficiency-enhanced transmitarray is proposed using a variety of phasing elements based on the magneto-electric (ME) dipole structure. Several different ME-dipole geometries and excitation mechanisms are investigated to realize the receive-and-transmit type elements that have same multilayer configuration, wide common bandwidth, and stable transmission phase differences. A number of different phase adjustments can be provided within a wide bandwidth by the proposed elements. A 16×16 transmitarray antenna working from 21.5 to 33 GHz (42%, defined according to 3 dB variation in aperture efficiency) is designed, fabricated, and tested, which confirms a peak gain of 26.8 dBi and a peak aperture efficiency of 41%. Comparing to the original 1-bit ME-dipole transmitarray, where only two transmission phases can be used, the presented hybrid-element design demonstrates a pronounced improvement in aperture efficiency with nearly the same bandwidth and element thickness.

Research Area(s)

  • Antenna feeds, Broadband antennas, Dipole antennas, Discrete lens, Geometry, heterogeneous array, hybrid element, magneto-electric (ME) dipole, Receiving antennas, transmitarray, Transmitting antennas, Wideband

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