Bandwidth and gain improvement of a crossed slot antenna with metasurface

Changfei Zhou; Sing Wai Cheung; Qinlong Li; Min Li

doi:10.1063/1.4984276

Bandwidth and gain improvement of a crossed slot antenna with metasurface

Changfei Zhou
, Sing Wai Cheung
, Qinlong Li
, Min Li

The University of Hong Kong

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

A wideband metasurfaced (MS) slot antenna is proposed for circularly polarized (CP) operation. The antenna consists of a crossed slot antenna (CSA) and a MS placed at a short distance above the CSA. The CSA has two slots placed in orthogonal positions and with distributed elements to generate two E-fields with 90°-phase difference for CP radiation. A microstrip line is used to single feed the CSA at the center. Simulations and measurements are used to study and design the MS slot antenna. The measured results show that, with the use of the MS, the impedance bandwidth can be increased from 4.24-6.78 GHz (2.54 GHz, 46.1%) to 3.36-6.91 GHz (3.55 GHz, 69.13%), and the axial-ratio bandwidth (ARBW) can be increased from 4.38-4.96 GHz (0.58 GHz, 12.4%) to 3.96-6.02 GHz (2.06 GHz, 41.28%). Within the ARBW, the realized co-polarized gain can be increased by about 3 dB on average.

Original language	English
Article number	211603
Journal	Applied Physics Letters
Volume	110
Issue number	21
DOIs	https://doi.org/10.1063/1.4984276
State	Published - 22 May 2017
Externally published	Yes

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10.1063/1.4984276

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title = "Bandwidth and gain improvement of a crossed slot antenna with metasurface",

abstract = "A wideband metasurfaced (MS) slot antenna is proposed for circularly polarized (CP) operation. The antenna consists of a crossed slot antenna (CSA) and a MS placed at a short distance above the CSA. The CSA has two slots placed in orthogonal positions and with distributed elements to generate two E-fields with 90°-phase difference for CP radiation. A microstrip line is used to single feed the CSA at the center. Simulations and measurements are used to study and design the MS slot antenna. The measured results show that, with the use of the MS, the impedance bandwidth can be increased from 4.24-6.78 GHz (2.54 GHz, 46.1\%) to 3.36-6.91 GHz (3.55 GHz, 69.13\%), and the axial-ratio bandwidth (ARBW) can be increased from 4.38-4.96 GHz (0.58 GHz, 12.4\%) to 3.96-6.02 GHz (2.06 GHz, 41.28\%). Within the ARBW, the realized co-polarized gain can be increased by about 3 dB on average.",

author = "Changfei Zhou and Cheung, \{Sing Wai\} and Qinlong Li and Min Li",

note = "Publisher Copyright: {\textcopyright} 2017 Author(s).",

year = "2017",

month = may,

day = "22",

doi = "10.1063/1.4984276",

language = "英语",

volume = "110",

journal = "Applied Physics Letters",

issn = "0003-6951",

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number = "21",

}

TY - JOUR

T1 - Bandwidth and gain improvement of a crossed slot antenna with metasurface

AU - Zhou, Changfei

AU - Cheung, Sing Wai

AU - Li, Qinlong

AU - Li, Min

PY - 2017/5/22

Y1 - 2017/5/22

N2 - A wideband metasurfaced (MS) slot antenna is proposed for circularly polarized (CP) operation. The antenna consists of a crossed slot antenna (CSA) and a MS placed at a short distance above the CSA. The CSA has two slots placed in orthogonal positions and with distributed elements to generate two E-fields with 90°-phase difference for CP radiation. A microstrip line is used to single feed the CSA at the center. Simulations and measurements are used to study and design the MS slot antenna. The measured results show that, with the use of the MS, the impedance bandwidth can be increased from 4.24-6.78 GHz (2.54 GHz, 46.1%) to 3.36-6.91 GHz (3.55 GHz, 69.13%), and the axial-ratio bandwidth (ARBW) can be increased from 4.38-4.96 GHz (0.58 GHz, 12.4%) to 3.96-6.02 GHz (2.06 GHz, 41.28%). Within the ARBW, the realized co-polarized gain can be increased by about 3 dB on average.

AB - A wideband metasurfaced (MS) slot antenna is proposed for circularly polarized (CP) operation. The antenna consists of a crossed slot antenna (CSA) and a MS placed at a short distance above the CSA. The CSA has two slots placed in orthogonal positions and with distributed elements to generate two E-fields with 90°-phase difference for CP radiation. A microstrip line is used to single feed the CSA at the center. Simulations and measurements are used to study and design the MS slot antenna. The measured results show that, with the use of the MS, the impedance bandwidth can be increased from 4.24-6.78 GHz (2.54 GHz, 46.1%) to 3.36-6.91 GHz (3.55 GHz, 69.13%), and the axial-ratio bandwidth (ARBW) can be increased from 4.38-4.96 GHz (0.58 GHz, 12.4%) to 3.96-6.02 GHz (2.06 GHz, 41.28%). Within the ARBW, the realized co-polarized gain can be increased by about 3 dB on average.

UR - https://www.scopus.com/pages/publications/85019756385

U2 - 10.1063/1.4984276

DO - 10.1063/1.4984276

M3 - 文章

AN - SCOPUS:85019756385

SN - 0003-6951

VL - 110

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 211603

ER -

Bandwidth and gain improvement of a crossed slot antenna with metasurface

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