Summary
International Symposium on Antennas and Propagation
2010
Session Number:2WA2
Session:
Number:2WA2-1
Dual Frequency Band Operations of Composite Right/Left Handed Transmission Line and Inverted-F Antenna
Hirohisa Kitahara, Naobumi Michishita, Yoshihide Yamada,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Recently, mobile devices are reduced in size and have many functions. Small antennas for different systems are installed in the limited space. Especially in the terrestrial digital broadcasting application, small and broadband antenna is required. As a candidate of compact broadband antenna, a leaky wave antenna (LWA) using a composite right/left handed transmission line (CRLH-TL) composed of a ladder network has been investigated [1],[2]. It was cleared that the operating bandwidth and the attenuation constant depend on the antenna height. In addition, flat gain characteristic was confirmed when number of cells is large. However, the CRLH-TL has the slow wave region at higher band than the fast wave region for using as the LWA. Therefore, this guide band can be used for exciting other antenna for the different system. This paper presents the simulation results of the LWA terminated with an inverted-F antenna. The leaky wave region of the CRLH-TL composed of the ladder network is designed from 400 MHz to 800 MHz. The inverted-F antenna is designed at 2 GHz. The S11 and the radiation characteristics of the LWA terminated with the inverted-F antenna are investigated. And the size effect of finite ground plane to the radiation characteristics is clarified.