Yohandri, J.T. Sri Sumantyo, H. Kuze
The L-band of LHCP and RHCP array antenna for circularly polarized synthetic aperture radar (CP-SAR) has been developed using simple corner-truncated square-patch elements. The corporate feed design concept is implemented by combining a split-T and a 3-way circular-sector-shape power divider to excite circularly polarized radiation. The fabrication of both antennas based on the simulation using the method of moment (MoM) gives a good circular polarization. Impedance bandwidth and 3-dB axial ratio bandwidth for LHCP are 6.1% and 1.0%, respectively, while for RHCP are 6.2% and 1.0%, respectively. The full antenna (four panels), will be installed on an Unmanned Aerial Vehicle (UAV) JX-1 in Center for Environmental Remote Sensing, Chiba University. In the future, CP-SAR is expected to improve the characteristics of conventional SAR system, especially to extract some new physical information on the earth surface.
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, Kampus UNP, Padang, Sumatera Barat 25131, Jln. Prof. Hamka Air Tawar, Indonesia
