A study on miniaturization of a handset antenna utilizing magnetic materials

Author

Tanaka, Tomoki ; Hayashida, Shogo ; Imamura, Karufiimi ; Morishita, Hisashi ; Koyanagi, Yoshio

Author_Institution

Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan

Volume

2

fYear

2004

fDate

29 Aug.-1 Sept. 2004

Firstpage

665

Abstract

One of the trends observed in the cellular phone technologies is to dramatically reduce the size and the weight of the handset. Accordingly antennas used for such handsets must also follow downsizing of the handset unit. In particular, built-in antennas are required recently. In this paper, we investigate a downsizing technique of antennas for handset by utilizing a magnetic material. Firstly, basic characteristics of PIFA (planar inverted-F antenna) which is popular built-in antenna for handset, are obtained by the HFSS electromagnetic simulator, and calculated results are compared with measured results. Secondly, change of resonance frequency of PIFA is examined by arranging various types of magnetic materials. Suitable configuration and arrangement of magnetic materials are found. In a result the possibility of miniaturization of PIFA is confirmed by utilizing magnetic materials.

Keywords

cellular radio; magnetic materials; mobile antennas; mobile handsets; HFSS electromagnetic simulator; PIFA miniaturization; built-in antenna; cellular phone technology; downsizing technique; handset antenna; magnetic material; planar inverted-F antenna; Cellular phones; Conducting materials; Dielectric materials; Electromagnetic radiation; Magnetic materials; Magnetic resonance; Mobile communication; Research and development; Resonant frequency; Telephone sets;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 and the 5th International Symposium on Multi-Dimensional Mobile Communications Proceedings. The 2004 Joint Conference of the 10th Asia-Pacific Conference on

Print_ISBN

0-7803-8601-9

Type

conf

DOI

10.1109/APCC.2004.1391800

Filename

1391800