A Compact Right Hand Circular Polarization Microstrip Antenna using Inverted-L Shaped Feedline for GPS Receiver

In this paper, a compact right-hand circular polarized microstrip antenna for GPS receiver is presented. This antenna has an inverted-L shaped in feedline, which is used to obtain circular polarization. The dimension of the antenna is 40 mm x 40 mm using FR4 as a substrate, with 4.4 of the dielectric constant and 1.6 mm of height. The simulation result shows that at operating frequency 1575.42 MHz has −18.9 dB of return loss and 2.04 dB of gain. Furthermore, impedance bandwidth and circular polarization bandwidth (CPBW) simulation are 102 MHz and 27 MHz respectively. The measurement result obtained 58.1 MHz of the impedance bandwidth at the frequency range from 1524.7 MHz - 1582.8 MHz and the value of gain at 1575.42 MHz is 1.24 dB.