Dual-Sense Circular Polarization Antenna Based on Reconfigurable Orthogonal Network

Autor: Mingyu Sun, Zhe Zhang, Kang An, Xianghui Wang, Yuezhi Jiang, Aixin Chen
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: International Journal of Antennas and Propagation, Vol 2019 (2019)
Druh dokumentu: article
ISSN: 1687-5869
1687-5877
DOI: 10.1155/2019/1670786
Popis: A novel circular polarization (CP) reconfigurable microstrip antenna is presented. The CP reconfigurable antenna is divided into three layers, composed of an annular radiating patch, ring slot, and reconfigurable orthogonal network (RON). The designed antenna is fed by dual vertical branches at the output port of the RON. By adjusting the bias voltage of the PIN switch loaded on the reconfigurable orthogonal network, the output phase can be changed, which means that the polarization direction of CP antenna is switchable. Simulation results show that the proposed feeding network provides constant phase difference and lower insertion loss for both states in the operating frequency band, thereby achieving good match and axial ratio characteristics either LHCP or RHCP state. Measured results show that the proposed antenna exhibits operational bandwidth of 1.2% with axial ratio below 3 dB and return loss above 10 dB in both polarized states. Good agreement between simulated and measured results is obtained.
Databáze: Directory of Open Access Journals
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