Design of circular polarization microstrip antenna circular dual-band on the frequency 145.9 MHz and 436.9 MHz for portable satellite earth stations nano

In this paper is presented the design of a dual-band microstrip antenna using disk resonator by RLC load circuit. The frequencies of expected work in the design of this antenna are 145.9 MHz and 436.9 MHz. This antenna design using CST Microwave Studio, the measured parameter is the return loss, VSWR, and antenna gain. Design of antenna is realized and measured for all of parameters. The simulation results obtained for the frequency 145.9 MHz: -26.633 dB return loss; VSWR 1.0978; and the gain realized 0.09702 dB, beside that for the frequency 436.9 MHz is obtained: -30.817 dB return loss; VSWR 1.0593; and gain realized 0.07533 dB. Realization of measurement results for the frequency 145.9 MHz is obtained: -20.23 dB return loss; VSWR 1.283; and gain of 1.78 dBi, and for the working frequency 436.9 MHz is obtained: -16.64 return loss; VSWR 1.394; and gain 6.02 dBi. This antenna can be used as an antenna transceiver Nano portable satellite earth stations.