Slot Loaded Capacitive Fed Suspended RMSA with Meandered Ground Plane: A Recent Study

Abstract

Variations in capacitive fed suspended RMSA systems are proposed in this research. Initially, the reference antenna consists of a rectangle patch measuring 35.5 X 45.6 mm2 and a small rectangular feed patch measuring (1.4 X 4) mm2 both of which are suspended above the ground plane on the same substrate. Probe feed or coaxial feed is popular and widely used in MSA as it can feed the patch at any arbitrary position without much difficulty. The small patch is fed with a coaxial probe, which electromagnetically excites the radiator patch, resulting in a large impedance bandwidth (BW) of 39 percent, strong gain and a broadside radiation pattern. The prototype antenna was created by meandering the ground plane of the reference antenna with three rectangular slots, and measurements were taken to validate the outcome for compact broadband response. The prototype antenna was then created by loading a pair of rectangular slots in the radiating patch of the reference antenna in addition to the rectangular slots in the ground plane, and measurements were taken to validate the result for compact dual band response.