ETRI Journal
- Volume 29 Issue 6
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- Pages.725-735
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- 2007
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
Broadbanding of a Planar Antenna with Three Frequency Bands and Its Application
- Matsui, Hiroyasu (Graduate School of Engineering, Tokai University) ;
- Wakabayashi, Toshio (School of Information Science and Engineering, Tokai University)
- Received : 2007.05.25
- Published : 2007.12.31
Abstract
This paper describes a line element planar antenna with three frequency bands. To obtain broadband characteristics, a modified planar antenna that has semi-elliptical elements based on the characteristics of a line element planar antenna is proposed and analyzed by the finite difference time domain method. Return loss characteristics are discussed as functions of the eccentricity values of semi-ellipse at each element. The broadbanding of the modified planar antenna is implemented based on the results. The planar antenna with three systems (an 800 MHz band cellular phone, a third-generation cellular phone, and a 2.4 GHz band wireless LAN system) is considered as an application example.