Ultra-Wideband Shaped-Chalice Microstrip Patch Antenna for Wireless Communications Applications

Abstract

The paper presents two compact ultra-wideband microstrip antennas for wireless communications applications. The antenna bandwidth is enhanced by sharping of upon part of ground and crop the two bottom edges of the patch sheet greatly improves the bandwidth. Two designs are of the same size and shape with a slight difference between them, both designs have the same size $30\times 26\times 1.6mm^{3}$ and are printed on FR-4 (flame resistant epoxy) material with height $(h)$ of 1.6 mm, loss tangent $(tan\delta)$ of 0.02 and dielectric constant $(\varepsilon_{r})$ of 4.4 and a 50-ohm feed line for the antenna is used. The first design that provides three bands, the first band of (3.3 - 11.88) GHz with resonant frequencies of 3.9/8.38/11.28 GHz, the second band of (15.9-19) GHz at 18 GHz resonant frequency, third band (21.47-25.44) GHz at 23.88 GHz resonant frequency. The second design provides three bands, the first band is (3.14-11.9) GHz with resonant frequencies of 3.8 / 5.3 / 8.4 / 11 GHz, the second band of(15.7–18.7) GHz at the resonant frequency of 17.9 GHz and the third band of (21-24.9) GHz at 23 GHz resonant frequency. The results and designed is applied by using HFSS software.