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Size reduction of circularly polarized slot antenna using open C-slot for WiMAX application

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  • Chien-Yuan Pan
  • Bo-Yao Wu
  • Jen-Yea Jan

Abstract

A new wideband circularly polarized (CP) open C-slot antenna fed by a microstrip line for size reduction is presented. The proposed antenna consists of an open C-slot with a straight slit on the ground plane, and a microstrip line with a semicircle-shaped patch on the other side of the substrate. The antenna size is reduced by about 35% compared with the circular slot antenna. By using the semicircle-shaped patch to disturb the magnetic current distribution on the open C-slot, a wider CP bandwidth can be achieved. The measured results show that the proposed antenna can provide a 3 dB axial ratio (AR) bandwidth of 40% (4.1–6.2 GHz) and a 10 dB return loss impedance bandwidth of 107% (2.3–7.6 GHz). The measured gain variation is from 2.8 to 4.3 dBic in the 3 dB AR bandwidth. A prototype of the proposed antenna has a simple and compact size of 30 × 55 × 1.6 mm3.

Suggested Citation

  • Chien-Yuan Pan & Bo-Yao Wu & Jen-Yea Jan, 2013. "Size reduction of circularly polarized slot antenna using open C-slot for WiMAX application," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 27(13), pages 1640-1648, September.
    • Handle: RePEc:taf:tewaxx:v:27:y:2013:i:13:p:1640-1648
    DOI: 10.1080/09205071.2013.821956
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