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Simple Reconfigurable Circularly Polarized Antenna at Three Bands

Title
Simple Reconfigurable Circularly Polarized Antenna at Three Bands
Author
윤태열
Keywords
broadband; circularly polarized; parasitic element; reconfigurable antenna; triple-band
Issue Date
2019-05
Publisher
MDPI
Citation
SENSORS, v. 19, no. 10, no. 2316
Abstract
In this paper, a simple design for a triple-band circularly polarized (CP) antenna with the capability of switching its polarization between dual-sense CPs is presented. The proposed antenna is comprised of a monopole loop antenna as a primary radiator. By placing a parasitic loop around the primary radiator, an additional CP band is achieved. Reconfigurability of the polarization between right-hand CP (RHCP) and left-hand CP (LHCP) at three different frequencies of 2.5, 3.3, and 3.8 GHz was realized by controlling the ON/OFF states of two PIN diodes. For validation, the fabricated antenna yielded an impedance bandwidth of 52.6% (2.34-4.01 GHz), while the axial ratio bandwidths for both the RHCP and LHCP states were 3.5% (2.47-2.56 GHz), 6.6% (3.20-3.42 GHz), and 2.4% (3.74-3.83 GHz). The measured broadside gains within the axial ratio bandwidth were 1.2, 2.7, and 1.4 dBi, respectively. Compared to other reconfigurable multi-band CP antennas, the proposed design is the first work to achieve a reconfigurable polarization at three distinct bands at a low fabrication cost by using only two diodes. The proposed antenna is suitable for WLAN and WiMAX applications.
URI
https://www.mdpi.com/1424-8220/19/10/2316https://repository.hanyang.ac.kr/handle/20.500.11754/151225
ISSN
1424-8220
DOI
10.3390/s19102316
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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