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Bandwidth and gain improvement of a crossed slot antenna with metasurface

Zhou, Changfei LU ; Cheung, Sing Wai ; Li, Qinlong and Li, Min (2017) In Applied Physics Letters 110(21).
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,... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
110
issue
21
publisher
American Institute of Physics
external identifiers
  • scopus:85019756385
ISSN
0003-6951
DOI
10.1063/1.4984276
language
English
LU publication?
no
id
fd1d5dff-80ee-4973-b6f9-4322f5667294
date added to LUP
2018-04-06 14:52:38
date last changed
2018-11-21 21:39:08
@article{fd1d5dff-80ee-4973-b6f9-4322f5667294,
  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.},
  articleno    = {110, 211603},
  author       = {Zhou, Changfei and Cheung, Sing Wai  and  Li,  Qinlong and Li, Min},
  issn         = {0003-6951},
  language     = {eng},
  number       = {21},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Bandwidth and gain improvement of a crossed slot antenna with metasurface},
  url          = {http://dx.doi.org/10.1063/1.4984276},
  volume       = {110},
  year         = {2017},
}