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Bandwidth enhancement of circularly polarized microstrip patch antenna using multiple L-shaped probe feeds

✍ Scribed by Wai-Kwok Lo; Chi-Hou Chan; Kwai-Man Luk

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
133 KB
Volume
42
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Impedance‐bandwidth enhancement of microstrip antennas using an L‐shaped probe feed has previously been demonstrated. In this paper, axial‐ratio bandwidth enhancement is achieved for circularly polarized (CP) microstrip patch antenna using dual and four L‐shaped probe feeds. By controlling the excitation phase and angular orientation of the horizontal portion of each L‐probe, circular polarization can be generated with wide axial‐ratio bandwidth by exciting the circular patch. In the dual L‐shaped probe case, the impedance and axial‐ratio bandwidth are 42% and 27.23%, respectively. On the other hand, for the four L‐shaped probes case, both of these figures increase to 45%. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 263–265, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20272

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