A comprehensive comparative study of Bandwidth enhancement of an antenna by non contacting feed lines with Rectangular Microstrip Patch (RMP) using superstrate at ku band

摘要

So far as this paper is concerned, this paper presents a comparative study of a rectangular Microstrip patch antenna at Gigahertz (GHz) frequency using non contacting microstrip feed lines of length 14 to 14.9 mm (we didnt extend the feed line up to 15mm length as in this case it would start contacting with the patch) with superstrate. This means we created capacitive coupling between patch and feed line by varying the length of feed line up to which it doesnt come into contact with the patch. The results presented here are obtained using Ansoft High Frequency Structure Simulator (HFSS) 11.0 software which is based on full wave finite element method. As a matter of fact, here five different feed line lengths antennas outcomes are shown and their comparative results are also shown in the tabular form. In this study a superstrate of thickness 5mm is also introduced to get the more precise results. Here it is very important to mention that the best performance of antenna i.e., below -10dB that we achieved at the feed line length of 14.9 mm i.e. spacing between the feed line and patch is 0.1 mm and we got bandwidth of 41.5% and resonance frequency of 17.8 GHz at solution frequency of 17.8 GHz.