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Zhang, Long; Gao, Steven; Luo, Qi; Young, Paul R.; Li, Qingxia (2016)
Languages: English
Types: Article
Subjects: T
This paper presents a novel printed antenna with wide bandwidth, high gain and reconfigurable circular polarizations. A loop antenna is printed on both sides of a dielectric substrate: a dual PIN diode loaded loop is printed on one side while a dual gap loaded smaller loop is printed on the other side. By controlling the ON/OFF states of the PIN diodes, the polarization of the proposed antenna can be switched electronically to right-hand circular polarization (RHCP) or left-hand circular polarization (LHCP) over a wideband frequency range. A prototype is fabricated and measured to verify the performance of the antenna. The measured results indicate that the antenna achieves an impedance bandwidth of over 30%, and a 3-dB axial ratio (AR) bandwidth of 12.7% and 14.9% for RHCP and LHCP, respectively. The measured gain is around 8 dBic for LHCP state and 7 dBic for RHCP state. Due to advantages of wide overlapped bandwidth, simple feeding structure and high gain, this antenna is promising for applications in dual-CP wireless communication systems.

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