Design of a Compact CPW-Fed Monopole Antenna with Asymmetrical Hexagonal Slot Loaded Ground Structure For C/X/Ku Band Applications

Abstract

A novel design of ultra-wideband CPW-fed compact monopole patch antenna is presented in this article. The size of the antenna is 22×18×1.6 mm³ and operates well over an ultra-wideband frequency range (4.86–13.66) GHz (simulated) and (4.93-13.54) GHz (measured) covering C, X and partial Ku band applications. The proposed design consists of a defected ground plane and U-shape radiating patch along with two square shape parasitic patches in order to achieve the ultra-wideband (UWB) operations. The performance matrix is validated through measured results that indicates the wide impedance bandwidth (93.2 %) with maximum gain of 4 dBi with nearly 95% of maximum radiation efficiency, moreover the 3D gain pattern manifest approximately omni-directional pattern of proposed design. The prototype has been modeled using HFSS (High Frequency Structure Simulator-18) by ANSYS, fabricated and tested using vector network analyzer E5071C.