Slotted-microstrip antenna with modified ground plane for performance parameters enhancement

This paper presents a compact slotted rectangular microstrip antenna with modified ground plane. Performance advancements with simple modifications of a reference antenna has been carried out in the entire work. The radiating patch and the ground surface has been loaded by two asymmetrical slots and two symmetrical slots respectively. This slight change in antenna shape makes the microstrip antenna more compact. In addition, the directivity, gain, and radiation efficiency have been enhanced significantly. The overall antenna size is 41.3 mm × 48.5 mm × 1.6 mm. The proposed antenna provides 19.8% of the compactness along with 2.9dB of gain enhancement, directivity boost of 2.5dB and radiation efficiency improvement of 25%, approximately. An acceptable relationship is observed between co and cross polarization from achieved patterns which imply the antenna structure as a qualified radiator in terms of polarization purity. A prototype is fabricated with proper characterization. The measured results have a good agreement with simulated results.