Comparative Analysis of Quagi and Yagi-Uda Antenna using 4NEC2 Tool

Abstract

A Yagi-Uda antenna is one of the most widely used antenna in communication. Quagi antenna is a variation on vulnerable Yagi-Uda. Both the antennas are designed using 4NEC2 tool. Comparative analysis is being done on both 8-element Yagi-Uda antenna and 8-element Quagi antenna at 432 MHz frequency. A Quagi antenna is merely one of the most interesting amateur antenna designs to come down the pike in recent years. The need for low cost, high gain antenna for Moon bounce Communication, where moon is used as Passive communication satellite, inspired the development of Quagi antenna. Since Quagi is easy and non critical construction, cheap as well as simple, matching of feed line to the driven element, makes Quagi an attractive alternate to both Quad and Yagi-Uda antennas. At 432 MHz both Quagi and Yagi-Uda give almost same efficiency and gain, but Quad loop make an excellent driven element and reflectors, rods seem to be superior directors. So doing comparative analysis on both these antennas at 432 MHz would make sense and this made me to take up this topic.