Design and optimization high-performance bi-circular loop antenna with plane reflector and coaxial feed line at 2.45 GHz frequency

The aim of this study is to find the best design for high-performance medium range antenna by simulating bi-circular loop antenna with plane reflector. The coaxial feed line at 2.45 GHz frequency Finite Different Time-Domain (FD-TD) method was employed in simulation. The simulation results showed that the best parameters value are 14.95 mm of loops radius, 1.15 mm of links radius, and 15.57 mm of reflector gap. In these parameters, the antenna had a characteristic value of return loss -36.65 dB, bandwidth 354 MHz, gain 9.04 dB, VSWR 1.001, and the characteristic impedance of 49.97 Ω. Moreover, it was also used as IoT or other medium range communication applications.