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An application of a reflector for increase of the radiation efficiency of cellular telephone antennas

✍ Scribed by Eiji Hankui; Osamu Hashimoto; Shinichiro Nishizawa

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 293 KB
Volume: 10
Category: Article
ISSN: 1096-4290
DOI: 10.1002/1099-047x(200007)10:4<253::aid-mmce6>3.0.co;2-a

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✦ Synopsis

A reflector placed near a cellular telephone antenna is proposed to increase its radiation efficiency. In this study, a half wavelength dipole antenna at 900 MHz is treated as a cellular telephone model and a small plate reflector is placed between the antenna and a ( ) human head-sized phantom model. By using the finite-difference time-domain FDTD method, various kinds of materials, such as a dielectric material, a magnetic material, and a conductive material, are investigated for the reflector composition. Among them, a magnetic X Y ( X Y ) reflector having high and low complex relative permeability: I j is shown to r r r r be effective for increasing the radiation efficiency.

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