Analysis and Design of a Planar UWB Antenna for Spectrum Sensing in 3.1-10.6GHz

This paper describes the analysis and design of a hexagon slotted UWB monopole for spectrum sensing in the band 3.1-10.6GHz, which is FCC proposed unlicensed UWB range. It is a key module for implementing CR in 3.1-10.6GHz. The design is customized on the substrate (FR4) with size of 29×23×1.6mm
³
. It achieves S11 ≤ -10dB in 2.29GHz-12.61GHz. It shows 97% as maximum radiation efficiency at 3.1GHz and 4.2dBi as highest peak gain at 10.6GHz. Also, the analysis of optimized grounds with various slots in ground and patch is presented. This design is modeled using HFSS solver. The simulated S11 is favourable with the measured S11.