Performance Investigation of Dipole and Moxon Antennae for VHF Communication

Abstract

VHF communication links are mostly used by defense personnel and amateur radio operator or commonly known as HAM radio operators. The HAM radio operators communicate in the frequency band ranging from 144 to 146 MHz. Hence, in this paper, the dipole and Moxon antennae are designed for 145 MHz and are resonating at 144 MHz and 144.44 MHz, respectively. Both the dipole and Moxon antennae are simulated on HFSS using copper material and an element radius of 1.5 mm. The antennae are majorly investigated based on gain, directivity and return loss, and other parameters. The observed gain for dipole antenna and Moxon antenna is 2.4 dB and 6.2 dB, respectively, whereas the return loss of dipole antenna is −16.78 dB, and for Moxon antenna, the return loss is −30.26 dB. The Moxon antenna is highly directive as compared to the dipole antenna. As a result, Moxon antenna provides a reliable solution for VHF communication.