Design and Analysis of a Wideband Printed Monopole VHF Antenna for Airborne Applications

摘要

Design and analysis of a novel wideband printed monopole antenna operating in VHF band has been presented for airborne applications. The antenna employs meandering technique as well as top loading technique for achieving compactness and wide band width. The substrate used for designing of antenna was FR4 Epoxy having a dielectric constant 4.4 and thickness 1.6mm. To evaluate the performance and characteristics with various dimensional parameters, a set of parametric analysis has been carried out. The variations in frequency domain response of the antenna has been explained, in terms of variations in distributed inductance and capacitance. The design equation for resonant frequency has been derived based on the parametric studies. Good agreement was achieved between the results calculated and those obtained by simulations using HFSS. The antenna exhibits a 3:1 VSWR bandwidth of 23%. The antenna has a size of 0.17λ_0 × 0.14λ_0 at lowest frequency of operation.