Abstract
In this paper, a microstrip patch antenna is designed for wireless local area network (WLAN) standard UNII worldwide/2C/2E of 255 GHz bandwidth. Antenna is designed using a rectangular radiating patch on FR-4 substrate with a mushroom shaped slot in the ground plane. Slot is etched to achieve wider 10-dB bandwidth and circular polarization. Proposed structure provides left hand circular polarization (LHCP) for the positive Z-plane. Simulated antenna is fabricated and tested to validate the results. Measured impedance bandwidth as well as 3-dB axial ratio bandwidth is sufficient to cover the desired WLAN band from 5.47 to 5.725GHz. Antenna shows good radiation characteristics with high gain of 4.12 dB and less than 3-dB axial ratio bandwidth for the entire band which makes it a suitable candidate for WLAN applications.
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