Design and manufacture of a ferrimagnetic wave absorber for cellular phone radiations

Author

Pretorius, Johann

Author_Institution

Dept. of Electr. Eng., Tshwane Univ. of Technol., Nelspruit, South Africa

fYear

2004

fDate

8-9 Nov. 2004

Firstpage

119

Lastpage

123

Abstract

In this article, the absorber studied is used to insulate a confined area from incident electromagnetic waves. The aim is to block all microwaves from entering the confined area. Application of such absorbers is in the communication field where radio and cell phone signals are unwanted. When an electromagnetic wave hits ferrite particles, the magnetic field part of the wave is cancelled. Using normal wood that is transparent to radio waves, with fine particles of ferrimagnetic material sandwiched in the wood, radio waves are blocked, which allow several networks to operate close by without interference.

Keywords

electromagnetic interference; electromagnetic wave absorption; electronic equipment manufacture; ferrite devices; wood; cellular phone radiations; communication field; electromagnetic wave; ferrimagnetic material; ferrimagnetic wave absorber; ferrite particles; interference; magnetic field; microwave blocking; radio phone signal; radio waves; wood; Cellular phones; Electromagnetic scattering; Ferrimagnetic materials; Ferrites; Insulation; Magnetic confinement; Magnetic fields; Magnetic materials; Manufacturing; Microwave communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices for Microwave and Optoelectronic Applications, 2004. EDMO 2004. 12th International Symposium on

Print_ISBN

0-7803-8574-8

Type

conf

DOI

10.1109/EDMO.2004.1412411

Filename

1412411