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A Single Substrate Metasurface Dipole With Electrically Small Feeding Structure | IEEE Journals & Magazine | IEEE Xplore

A Single Substrate Metasurface Dipole With Electrically Small Feeding Structure


Abstract:

Low-profile metasurface antennas are proposed for cellular base station applications. The dual-slant crossed-dipole antennas with four resonances employ both transverse m...Show More

Abstract:

Low-profile metasurface antennas are proposed for cellular base station applications. The dual-slant crossed-dipole antennas with four resonances employ both transverse magnetic (TM) and transverse electric (TE) surface wave modes. The metasurface dipole arms are capacitively coupled by an electrically small crossed-feed in a low-cost single substrate. The metasurface layer consists of n \times n element arrays. The proposed low-profile ( 0.14\lambda ) antennas can achieve a 10-dB impedance bandwidth of 57%, 58%, and 84% for metasurface dipole arms comprising 2\times 2 , 3\times 3 , and 4\times 4 elements, respectively. For cellular 65° sector base station applications where 14 dB is required, a bandwidth of 51%, 52%, and 63% for 2\times 2 , 3\times 3 , and 4\times 4 elements, respectively, is realized. For a single dipole with a reflector, the average boresight gain is 9 dBi, 3-dB beamwidth is 62^{\circ }~\pm ~7^{\circ } , front-to-back ratio is better than 25 dB, and isolation is better than 35 dB over the frequency range of 1.7–2.7 GHz. For user equipment (UE) applications, extra low-profile ( 0.11\lambda ) antennas are also presented.
Published in: IEEE Transactions on Antennas and Propagation ( Volume: 72, Issue: 8, August 2024)
Page(s): 6287 - 6297
Date of Publication: 10 July 2024

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