DocumentCode
1921318
Title
Possibility of ultra fine isolator for portable phone
Author
Takeda, S. ; Kishimoto, Y. ; Itoh, H. ; Ichikawa, K.
Author_Institution
Hitachi Metals Ltd., Tokyo, Japan
Volume
1
fYear
2001
fDate
20-24 May 2001
Firstpage
479
Abstract
There exists a trade-off relationship between miniaturization of an isolator for portable phones and its specific bandwidth. In this paper, we introduce a new way to increase bandwidth over 13%, in spite of a reduction in garnet dimensions by one tenth, by the addition of LC impedance matching circuits. In the preliminary experiments, we obtained a 4 mm square isolator with 4.1% bandwidth at 836 MHz using LTCC technology.
Keywords
UHF devices; cellular radio; ferrite isolators; impedance matching; telephone sets; 836 MHz; LC impedance matching circuits; LTCC technology; bandwidth; garnet; miniaturization; portable phone; ultra fine isolator; Bandwidth; Capacitance; Circuits; Garnets; Impedance matching; Inductance; Isolation technology; Isolators; Magnetic resonance; Resonant frequency;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location
Phoenix, AZ, USA
ISSN
0149-645X
Print_ISBN
0-7803-6538-0
Type
conf
DOI
10.1109/MWSYM.2001.966935
Filename
966935
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