Development of Single Triangular Truncated Microstrip Antenna for CP-SAR Sensor

In this paper, we obtain the basic configuration of the Left-Hand Circular Polarization (LHCP) single triangular truncated microstrip antenna. Here, we discuss two types antenna, i.e. (i) triangular truncated proximity coupled feed antenna at target frequency, f = 1.25 GHz, (ii) triangular truncated microstrip-line feed antenna at target frequency, f = 5.5 GHz. Both of them are designed by using the Moments Method (MoM) for Circularly Polarized-Synthetic Aperture Radar (CP-SAR) sensor. The result of frequency characteristic performance and S-parameter for both of them at their target frequencies show 7.24 dBic and 7.28 dBic of gain, 0.11 dB and 1.25 dB of axial ratio, -19.73 dB and -13.45 dB of S-parameter, respectively. Moreover, the axial ratio bandwidth below 3 dB of these antennas are different around 15 MHz (1.2%) of (i) and 360 MHz (6.55%) of (ii).