Summary
International Symposium on Antennas and Propagation
2006
Session Number:1C2b
Session:
Number:1C2b-1
Electromagnetic Simulations of a W-loop Antenna Attached on a Rear Window of a Car
Taichiro Sato, Yoshihide Yamada, Kazushige Ogino,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
In order to apply the digital terrestrial TV service, a W-loop antenna had been developed. This antenna has very broad band characteristics of frequency range 470~716MHz. This antenna has the feature of placing an antenna between heater lines at a rear window of a car. Electrical performances are studies through experiment. However, design methods are not sufficiently clarified. In this paper, antenna design methods of a developed Wloop antenna are studied through electromagnetic simulations. First, a broad banding process of a W-loop configuration is clarified. It is shown that almost the needed frequency band width can be achieved by a W-loop configuration. In order to fulfil the entire band width, a parasitic wire is adapted. Next, antenna input impedance change when an antenna is attached on a glass is studied. Reduction of antenna input resistance is shown. Finally, calculated and measured results of VSWR characteristics are compared. Rather good agreements are obtained. Moreover, frequency characteristics of radiation patterns are studied. Radiation loss factors are clarified. Antenna impedance matching is shown to become the main factor.