A 200 MHz to 850 MHz VHF/UHF Antenna for Local Area Cognitive Radio Networks Applications
Imran Javeed Settu, Aloy Anuja Mary Gnanaraj · International Journal of Electrical and Electronic Engineering & Telecommunications · 2023
Cognitive Radio Networks (CRN) support the optimal usage of licensed vacant spectrum using interviewing and underlay techniques. The aim of this work is to design a Very High Frequency (VHF) and Ultra High Frequency (UHF) range wideband antenna between 200 MHz and 850 MHz for CRN application. Antenna fabrication was done using FR4 substrate which measures a dimension of 108 mm x 108 mm. The underutilized spectrum in the range is effectively utilized by the cognitive user in the absence of a licensed primary user. This is achieved by the spectrum sensing technique by sensing the user environment. Therefore the necessity of spectrum sensing antenna is determined by this work and the same is achieved through meticulous design and extensive testing. The simulated and measured results are well in agreement and achieve wide bandwidth of 650MHz with a peak radiation efficiency of 96%.