Yohandri, Josaphat Tetuko Sri Sumantyo, Hiroaki Kuze
A novel circularly polarized microstrip antenna using triple proximity-fed method is proposed in this paper. The circular polarization radiation is produced by adjusting 120° phase shift between the feeds. In the feeding network, a three-way circular-sector power divider is adopted to distribute the current equally to each feed. A method of moments is employed for optimizing the design and achieving a good circular polarization at the center frequency of 1.28 GHz. The measured result shows that 3-dB axial ratio bandwidth and maximum gain are about 0.68 (8.7 MHz) and 7.11 dBic, respectively, which are consistent with the simulated values of 0.70 (9.0 MHz) and 7.21 dBic. The narrow bandwidth and reasonable gain indicate that this antenna is promising for various applications in L-band. © 2011 Elsevier GmbH. All rights reserved.
Josaphat Microwave Remote Sensing Laboratory, Center for Environmental Remote Sensing, Chiba University, Inage-ku, Chiba, 263-8522, 1-33 Yayoi-cho, Japan; Physics Department, State University of Padang, Padang, Sumatera Barat 25131, Jl. Prof Dr. Hamka Air Tawar, Indonesia
