A circular CPW-fed slot antenna resonated by the circular loop for broadband circularly polarized radiation

✍ Scribed by I-Chung Deng; Qing-Xiang Ke; Ren-Jie Lin; Yueh-Tsu King

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 439 KB
• Volume: 50
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.23359

✦ Synopsis

Abstract

The coplanar waveguide (CPW) fed circular slot antenna, resonated by the circular loop with a narrow opening, is designed for obtaining broadband circularly polarized (CP) radiation. The length of protruded signal strip (L~S~) is utilized to adjust the phase difference between two orthogonal field components in the circularly polarized waves. In this design, the proposed antenna has the minimum return loss of −56.5 dB at the frequency of 2.403 GHz. The impedance and 3 dB axial‐ratio bandwidths can reach up to 740 MHz or 33.3% and 390 MHz or 16.6%, respectively. In addition, the simulated results are about as good as those of the measured ones. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1423–1426, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23359