We have developed an array antenna consisting of 12 elements of simple square-shaped, corner-truncated patches for circularly polarized synthetic aperture radar (CP-SAR) operated in the L-band. 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 fabricated antenna based on the simulation using moment method gives a good circular polarization at the center frequency of 1.27 GHz with an impedance bandwidth of 6.1% and 3-dB axial ratio bandwidth of 1.0%, satisfying the specification for our circularly polarized synthetic aperture radar intended for use onboard an unmanned aerial vehicle and a small satellite.
Prilando Rizki Akbar,
Josaphat Tetuko Sri Sumantyo,
"Development of Circularly Polarized Array Antenna for Synthetic Aperture Radar Sensor Installed on UAV," Progress In Electromagnetics Research C,
Vol. 19, 119-133, 2011. doi:10.2528/PIERC10121708
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