CPW-FED RECONFIGURABLE CLOVER-SHAPED ANTENNA WITH SWITCHABLE CIRCULAR POLARIZATION | Zendy

Lingsheng Yang | Zendy; Yongan Zhu | Zendy; Kuniaki Yoshitomi | Zendy

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CPW-FED RECONFIGURABLE CLOVER-SHAPED ANTENNA WITH SWITCHABLE CIRCULAR POLARIZATION

Author(s) -

Lingsheng Yang,

Yongan Zhu,

Kuniaki Yoshitomi

Publication year - 2015

Publication title -

progress in electromagnetics research c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 34

ISSN - 1937-8718

DOI - 10.2528/pierc15102104

Subject(s) - reconfigurable antenna , circular polarization , polarization (electrochemistry) , materials science , antenna (radio) , optoelectronics , electrical engineering , engineering , microstrip antenna , coaxial antenna , chemistry , microstrip

In this paper, a CPW-fed reconfigurable clover-shaped antenna with switchable circular polarization is proposed. This antenna consists of a clover-shaped patch, four p-i-n diodes, and two pairs of quarter-circular-rings. By electrically controlling the four p-i-n diodes to form two orthogonal bow-tie shaped current paths, the proposed antenna can be operated in two modes: the left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP) modes. Two pairs of quarter rings are used to improve the bandwidth and AR performance of the antenna. The measured 10-dB reflection coefficient and 3-dB axial-ratio (AR) bandwidth of the prototype antenna is approximately 12.3% and 19%, respectively, which is enough for some wireless applications such as WLAN IEEE 802.11 b/g (4%). Gain and radiation pattern are also presented.

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