Paper Info
Title
A novel wideband and circularly polarized cross-dipole antenna.
Abstract
In this paper, we present a novel wideband circularly polarized (CP) composite, called cavity-backed crossed dipole antenna for 2.45 GHz industrial, scientific, and medical (ISM) band wireless communication. To excite the CP radiation effectively, a curved-delay line providing an orthogonal phase difference among the cross-dipole elements is attached at corners of the sequentially rotated elements. By choosing a proper radius of the curved-delay line, a wide input impedance of the antenna can be realized. Unlike conventional cross-dipole antennas, the proposed cross-dipole antenna is designed with an open stub added to the radiating arms of the dipole so that both impedance and axial ratio bandwidths are enhanced. The antenna is center-fed by a 50-Omega coaxial cable and is placed above a cavity-backed reflector to obtain a directional CP radiation pattern. With the advantage of being center-fed, a symmetric CP radiation pattern can be achieved across the entire operating bandwidth. To further improve the directivity and the radiation pattern, a rectangular cavity-backed reflector is used. Simulated and measured results confirm that the proposed antenna has good CP characteristics. The proposed antenna obtains a broad 3-dB axial ratio bandwidth of 49% (1.20 GHz, 1.96-3.16 GHz) and an impedance bandwidth of 67.7% (1.66 GHz, 1.69-3.35 GHz) for reflection coefficient (S-11) <= -10 dB. It also yields an average CP gain of 9.2 dBic across the operating bandwidth and a peak CP gain of 10 dBic. Copyright (C) 2016 John Wiley & Sons, Ltd.
Year
DOI
Venue
2016
10.1002/wcm.2743
Wireless Communications and Mobile Computing
Keywords
Field
DocType
PRINTED ANTENNA,AXIAL-RATIO
Dipole antenna,Antenna (radio),Telecommunications,Antenna gain,Antenna measurement,Computer science,Radiation pattern,Optics,Monopole antenna,Coaxial antenna,Antenna factor,Distributed computing
Journal
Volume
Issue
ISSN
16
17
1530-8669
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Wei He100.34
Yejun He246340.47
Manos M. Tentzeris313825.84