Effects of an epoxy-resin-fiber substrate for a W-shaped microstrip antenna

Abstract

A W-shaped microstrip antenna using an epoxy-resin-fibre substrate is presented. The proposed antenna consists of a circular slot and two rectangular slots printed on a dielectric resin-fibre substrate and is excited by a 50-W microstrip transmission line. A commercially available, high-frequency structural simulator (HFSS) based on the finite-element method (FEM) was used in this investigation. The nearly omni-directional and bidirectional radiation pattern exhibited average gains of 3.12 dBi and 5.44 dBi for the lower band and upper band, respectively. The effects of epoxy-resin-fiber are discussed through comparisons of different substrate materials. Keywords: epoxy resin-fibre, microstrip line, W-shaped Predstavljena je mikrotrakasta antena W-oblike na epoksi podlagi, oja~ani z vlakni. Predlagana antena sestoji iz kro`ne re`e in dveh pravokotnih re`, natiskanih na dielektri~ni podlagi iz smole z vlakni in sta vzbujani s 50 W mikrotrakastim vodnikom. V tej preiskavi je bil uporabljen komercialno razpolo`ljiv visoko frekven~ni strukturni simulator (HFSS), ki temelji na metodi kon~nih elementov (FEM).V spodnjem in zgornjem pasu je vsesmerno sevanje kazalo 3,12 dBi, dvosmerno sevanje pa 5,44 dBi. Vpliv vlaken za oja~anje je bil prikazan s primerjavo razli~nih materialov podlage.