Analysis of a monopole antenna with G type structure

In this paper, analyzing parameters of a monopole antenna with G type structure is proposed consisting of one closed rectangular wire loop and one open rectangular wire loop, fed by 50Ω coaxial cable. Parameters are; closed rectangular wire radius, open rectangular wire radius, length of wire respect to the frequency, length of L1 and angles of corners. The software Ansoft HFSS is used to analyze parameters of antenna for gain, bandwith and radiation pattern. Parameters are tested for two central frequency; 1.1 Ghz and 5.5 Ghz. Results shows proposed antenna radiates at 1.1 Ghz and 5 Ghz with VSWR less than 2 and % 60 bandwith without changing basic structure .