Accurate measurement method using fiber-optics for an antenna on a portable telephone

Author

Fukasawa, Tom ; Shimomura, Kazuya ; Ohtsuka, Masataka

Author_Institution

Mitsubishi Electr. Corp., Kanagawa, Japan

fYear

2003

fDate

15-17 Oct. 2003

Firstpage

138

Lastpage

139

Abstract

We propose an accurate measurement method for radiation and impedance characteristics of an antenna on a portable telephone. We use fiber optics for the feed instead of coaxial cables in order to remove the undesired influence of the coaxial cables. We show the proposed measurement system using the fiber optics can achieve measurement linearity as accurate as that of the conventional system using coaxial cable, and also the influence of the fiber optics is negligible. The measurement results of a monopole antenna on a rectangular box show the validity of the measurement system. On the other hand, the conventional method using the coaxial cable affects the measurement results.

Keywords

antenna feeds; antenna radiation patterns; antenna testing; electric impedance measurement; mobile antennas; mobile handsets; monopole antennas; optical fibres; accurate measurement method; fiber optics feed; impedance characteristics; measurement linearity; monopole antenna; portable telephone antenna; radiation characteristics; rectangular box; Antenna measurements; Battery charge measurement; Coaxial cables; Impedance measurement; Optical fiber cables; Optical fibers; Phase measurement; Position measurement; Radio frequency; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Technology, 2003. IEEE Topical Conference on

Print_ISBN

0-7803-8196-3

Type

conf

DOI

10.1109/WCT.2003.1321458

Filename

1321458