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Dual-frequency circularly polarized annular-ring slot antenna fed by a double-bent microstripline

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5 Author(s)
Jie Chen ; Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi''an ; Ying-Zeng Yin ; Lu Liu ; Hai-jin Zhou
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A novel design of a dual-frequency circularly polarized annular ring slot antenna is presented. The dual-frequency characteristic is achieved using a single-layer double-bent microstripline-fed configuration coupled to a dual-annular ring slot antenna. The 10 dB return loss impedance bandwidths (VSWRles2) for the lower and higher band are 31.3% and 10.6%, respectively. The 3 dB axial-ratio bandwidths are 10.5% and 1.5% with respect to 2.15 GHz and 3.8 GHz, respectively. The proposed antenna with broad axial-ratio bandwidth at the lower frequency and simple structure is easy to be fabricated and adjusted.

Published in:

Antennas, Propagation and EM Theory, 2008. ISAPE 2008. 8th International Symposium on

Date of Conference:

2-5 Nov. 2008