Summary
International Symposium on Antennas and Propagation
2008
Session Number:1C05
Session:
Number:1C05-2
Novel Multilayer Structure Yagi-Uda Antenna
Kuo-Lun Hung, Hsi-Tseng Chou, Kuei-Jen Lee,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
A Yagi-Uda (Yagi) antenna is a parasitic linear array of parallel dipoles used to generate endfire beam formation. A traditional Yagi-Uda antenna consists of a driven element, a reflector, and one or more directors. This antenna structure is simple to build, lightweight, and low cost. The reflector and directors are not driven directly, but instead couple parasitically to the driver [1]. It is well known from antenna theory that the Yagi-Uda antenna is primarily used to achieve end-fire radiation by satisfying appropriate amplitude and phase conditions (equal amplitude and opposite phase) for the closely-spaced driven element, reflector, and the directors. Traditionally, Yagi antennas are designed using wire dipole or printed dipole antennas. In 1991, Huang presented a design of the Yagi antenna based on microstrip patches [2]. Recently, an interesting configuration of the printed Yagi antenna was presented in [3], which was modified and optimised in [4,5]. In this paper, a novel Yagi-Uda antenna is proposed as shown in figure 1. The driver and director are printed dipole place on different layer of printed circuit board (PCB), and the reflector is a conductive plan. Unlike traditional printed Yagi antenna which configuration cannot be changed after fabricate, multilayer structure provide more variation.