Design of Fork Antenna

Abstract

AbstractHere, we propose single layer, triple-feed four elements fork array antenna which uses transmission line feed and suitable for different application. The proposed design presents with high return loss and 2:1 VSWR range. This project achieves good result when port 1 and 2 acts as an active port, and port 3 acts as a parasitic element. At the above-mentioned condition, we achieved two resonant frequencies of about 4.37 GHz and 5.31 GHz with − 37.2 dB and − 65.36 dB return loss, respectively. Also − 10 dB bandwidth of about 4.69 GHz shows the proposed structure uses as wide bandwidth for the above-mentioned condition. But when any one port is active and others acts as parasitic elements, that condition also achieves a considerable result in terms of bandwidth. The proposed antenna uses as wide bandwidth antenna for any combination of feeds. But the antenna does not work properly when port 1 or port 3 active individually and other ports acts as parasitic elements. At this condition, the proposed structure has good resonant frequency with good return loss but the bandwidth not sufficient for the application for which it is intended. Also got the absolute gain ranges from − 1.68 to − 21.52 dBi for all the resonant frequencies. The main achievement is increased frequency ratio with no intersymbol interference (ISI).KeywordsForkPortISIGainVSWR