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High Gain Windmill-shaped CP Antenna Using High-order Mode and Ground-edge Diffraction

Zhou, Changfei LU and Cheung, Sing Wai (2018) In IEEE Antennas and Wireless Propagation Letters 17(3). p.368-372
Abstract
In this letter, the high-order mode and ground-edge diffraction of a slot antenna are used to achieve a high gain. To inhibit the multilobes at the high-order mode, ground-edge diffraction is utilized to form a single main lobe by changing the size of the ground plane of the slot radiator. Then, this slot antenna is employed to construct a windmill-shaped array antenna for circular polarization. A four-way sequential-phase feeding network is designed to feed the four slot elements, which are placed in orthogonal positions to form a windmill shape. A reflector is placed under the four slot elements to make the proposed antenna unidirectional. The slot elements are excited in the high-order resonant mode, instead of the fundamental resonant... (More)
In this letter, the high-order mode and ground-edge diffraction of a slot antenna are used to achieve a high gain. To inhibit the multilobes at the high-order mode, ground-edge diffraction is utilized to form a single main lobe by changing the size of the ground plane of the slot radiator. Then, this slot antenna is employed to construct a windmill-shaped array antenna for circular polarization. A four-way sequential-phase feeding network is designed to feed the four slot elements, which are placed in orthogonal positions to form a windmill shape. A reflector is placed under the four slot elements to make the proposed antenna unidirectional. The slot elements are excited in the high-order resonant mode, instead of the fundamental resonant mode, and ground-edge diffraction of the slot elements is used to make the radiation pattern form a single strong lobe with increased gain at the +z -direction. The antenna is studied and designed using simulation and measurement. Measured results show that the proposed antenna has a common bandwidth (overlapping of the impedance bandwidth, the axial-ratio bandwidth, and the 1 dB gain bandwidth) of 4.73–5.53 GHz (0.8 GHz, 15.6%), a realized peak gain of 13.4 dBi, and an efficiency higher than 89.2%. (Less)
Please use this url to cite or link to this publication:
author
and
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Antennas and Wireless Propagation Letters
volume
17
issue
3
pages
368 - 372
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85040064743
ISSN
1548-5757
DOI
10.1109/LAWP.2018.2789355
language
English
LU publication?
no
id
1bf7697b-9214-4ff5-a225-8e5cbfbb07cd
date added to LUP
2018-03-16 09:11:51
date last changed
2022-04-25 06:16:13
@article{1bf7697b-9214-4ff5-a225-8e5cbfbb07cd,
  abstract     = {{In this letter, the high-order mode and ground-edge diffraction of a slot antenna are used to achieve a high gain. To inhibit the multilobes at the high-order mode, ground-edge diffraction is utilized to form a single main lobe by changing the size of the ground plane of the slot radiator. Then, this slot antenna is employed to construct a windmill-shaped array antenna for circular polarization. A four-way sequential-phase feeding network is designed to feed the four slot elements, which are placed in orthogonal positions to form a windmill shape. A reflector is placed under the four slot elements to make the proposed antenna unidirectional. The slot elements are excited in the high-order resonant mode, instead of the fundamental resonant mode, and ground-edge diffraction of the slot elements is used to make the radiation pattern form a single strong lobe with increased gain at the +z -direction. The antenna is studied and designed using simulation and measurement. Measured results show that the proposed antenna has a common bandwidth (overlapping of the impedance bandwidth, the axial-ratio bandwidth, and the 1 dB gain bandwidth) of 4.73–5.53 GHz (0.8 GHz, 15.6%), a realized peak gain of 13.4 dBi, and an efficiency higher than 89.2%.}},
  author       = {{Zhou, Changfei and Cheung, Sing Wai}},
  issn         = {{1548-5757}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{368--372}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Antennas and Wireless Propagation Letters}},
  title        = {{High Gain Windmill-shaped CP Antenna Using High-order Mode and Ground-edge Diffraction}},
  url          = {{http://dx.doi.org/10.1109/LAWP.2018.2789355}},
  doi          = {{10.1109/LAWP.2018.2789355}},
  volume       = {{17}},
  year         = {{2018}},
}