Abstract
AbstractIn this paper, an ultra-wide band antenna made of simple circular patch is designed. Various design evolutions of the circular patch antenna have been discussed. A conventional circular patch with partial ground is designed to have an ultra-wide frequency band. Since there is an impedance mismatch at mid frequencies, a slit is etched at the ground to improve the matching. Then, a square slot is etched in the circular patch to have better performance characteristics. The antenna is designed on FR4 substrate having 1.6 mm thickness. The circular patch having square slot is operating from 2.7 to 12.1 GHz which is more than an ultra-wide frequency range. The other antennas are applicable at WiMAX (3.2–3.8 GHz), WLAN (5.1–5.3 GHz), and X-band (8–12 GHz) frequencies. The proposed antenna is also applicable for wearable application as its SAR value is 1.5 W/Kg. The proposed design is simulated using Ansys HFSS simulation software.KeywordsUltra-wide band frequencyCircular patchSquare slotWiMAXWLANX-bandFR4 substrate
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