Slot Loaded Patch Antenna with Broadened Bandwidth and Stable Radiation Pattern

Abstract

This paper presents a bandwidth-enhanced patch antenna, with a pair of uniform straight slots symmetrically and longitudinally incorporated into the radiating patch along the two non-radiating edges. The simulated results show that compared with the conventional antenna, the slotted patch antenna's bandwidth can be enhanced without the size enlargement or radiation pattern distortion through properly setting the dimension and position of the slots. For verification, a prototype antenna is designed on an Fr4 substrate with thickness 1.6mm for 2.4GHz WLAN application. The overall size of the antenna is 60*60*1.6 mm3 and it can achieve a 96% bandwidth increase without enlarging the size. Also, it can keep the radiation pattern stable.