Design and Analysis of Dual Frequency Quarterwave Shorted Microstrip Patch Antenna for Satellite MIMO

A dual frequency quarterwave shorted microstrip patch antenna based on FR4 Epoxy dielectric substrate for satellite applications is presented. The approach is to miniaturize the antenna by using a shorting wall in a halfwave rectangular patch of size 19.3mm×24.6mm into a dual quarterwave antenna. By comparing with other structures in traditional antennas, a quarterwave antenna is distinctive by its concise structure. Antenna parameters are calculated according to the theoretical model equations. The structure can efficiently overcome the impedance mismatch due to the coaxial feed and provides a directional radiation pattern. The Antenna consists of two coaxial feeds and can act as 2×2 MIMO with similar dual resonant frequencies. By using similar slots on the patch results in getting good return loss along with the dual frequency operation.