A Design of Broadband Circularly Polarized C-Shaped Slot Antenna With Sword-Shaped Radiator and Its Array for L/S-Band Applications | Zendy

Rui Xu | Zendy; Jian-Ying Li | Zendy; Jie Liu | Zendy

Open Access

A Design of Broadband Circularly Polarized C-Shaped Slot Antenna With Sword-Shaped Radiator and Its Array for L/S-Band Applications

Author(s) -

Rui Xu,

Jian-Ying Li,

Jie Liu

Publication year - 2017

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2017.2788008

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, a novel wideband circularly polarized (CP) slot antenna and its array are presented. The antenna element consists of a C-shaped slot and a 50-

$\Omega $

microstrip-fed port to achieve left-hand circular polarization. Both the impedance bandwidth (IBW) and the 3-dB axial ratio bandwidth (ARBW) are greatly broadened by off-center microstrip-fed sword-shaped structure. A

$2\times 2$

array prototype based on the proposed CP element is also designed. Sequential rotation microstrip-feeding structure is used to excite four antennas and to realize good symmetric unidirectional radiation. To verify this design, both the CP antenna element and

$2\times 2$

array are fabricated and measured. The measured results of the antenna element exhibit an IBW of 132% (0.85–

$4.15~GHz$

) and an ARBW of

$95.7{\%} (1.20-3.40$

GHz). The measured ARBW and IBW of the

$2\times 2$

antenna array are about 108.3% (1.10–

$3.70~GHz$

) and

$100{\%} (1.15-3.45$

GHz), respectively. And the measured peak gain of the antenna array reaches 13.4 dBic. The proposed antenna is very suitable for CP applications in L/S bands.

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