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[ABSTRACT]The development of radar technology, Synthetic Aperture Radar (SAR) and Unmanned Aerial Vehicle (UAV) relatively fast and demanding needs of communication facilities and infrastructure that has a variety of platforms and imaging of high quality, which can generate data processed with high resolution and a better image for all types of terrain explored. In this paper, it obtain the array construction antenna for Circularly Polarized-Synthetic Aperture Radar (CP-SAR) embedded an UAV with compact, small, and simple configuration i.e. the developing a single and 16-element array antenna with simple equilateral triangular-shaped, tip-truncated patch for CP-SAR operated in the L- band. An equilateral triangular truncated microstrip antenna is proposed for circularly- polarized synthetic aperture radar (CP-SAR) systems operated in L-Band (1.27 GHz). Electromagnetically coupled, dual-feeding method is applied to generate the circularly polarized wave radiating from the patch. The performance characteristics of these antennas are circular polarization, both circular to the left or to the right, making them easier to capture images of objects on earth for processing information content that can be utilized. The feeding design concept is implemented by simple feed with likely length square-shape that can generates two modes using perturbation segment (as) and stimulate the same current distribution at each patch and also excite both a left-hand circular polarization (LHCP) and a right-hand circular polarization (RHCP). The simulated antenna based on the IE3D software using moment method gives a good circular polarization at the center frequency of 1.27 GHz with an impedance bandwidth of 0.5% and 3-dB axial ratio bandwidth of 100%, satisfying the specification for our circularly polarized synthetic aperture radar intended for using on-board an UAV. |
