A Wideband Circularly Polarized Antenna with a Multiple-Circular-Sector Dielectric Resonator
School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
Author to whom correspondence should be addressed.
Academic Editor: Stephane Evoy
Received: 22 August 2016 / Revised: 27 October 2016 / Accepted: 28 October 2016 / Published: 3 November 2016
This paper presents the design of a wideband circularly polarized antenna using a multiple-circular-sector dielectric resonator (DR). The DR is composed of twelve circular-sector DRs with identical central angles of 30
but with different radii. A genetic algorithm is utilized to optimize the radii of the twelve circular-sector DRs to realize wideband circular polarization. The proposed antenna is excited using an aperture-coupled feeding technique through a narrow rectangular slot etched onto the ground plane. An antenna prototype is experimentally verified. The measured −10 dB reflection and 3 dB axial ratio (AR) bandwidths are 31.39% (1.88–2.58 GHz) and 19.30% (2.06–2.50 GHz), respectively, covering the operating bands of the following systems: UMTS-2100 (2.145 GHz), WiMAX (2.3 GHz), and Wi-Fi (2.445 GHz). A measured peak gain of 7.65 dBic at 2.225 GHz and gain variation of less than 2.70 dBic within the measured 3 dB AR bandwidth are achieved. In addition, the radiation patterns of the proposed antenna are presented and discussed.
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Trinh-Van, S.; Yang, Y.; Lee, K.-Y.; Hwang, K.C. A Wideband Circularly Polarized Antenna with a Multiple-Circular-Sector Dielectric Resonator. Sensors 2016, 16, 1849.
Trinh-Van S, Yang Y, Lee K-Y, Hwang KC. A Wideband Circularly Polarized Antenna with a Multiple-Circular-Sector Dielectric Resonator. Sensors. 2016; 16(11):1849.
Trinh-Van, Son; Yang, Youngoo; Lee, Kang-Yoon; Hwang, Keum C. 2016. "A Wideband Circularly Polarized Antenna with a Multiple-Circular-Sector Dielectric Resonator." Sensors 16, no. 11: 1849.
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