NDLI: Band-switching SAW antenna duplexers for US-PCS

Content Provider	IEEE Xplore Digital Library
Author	Takayama, R. Nakanishi, H. Sakuragawa, T. Satoh, Y. Kawasaki, T.
Copyright Year	2002
Description	Author affiliation: Corporate Components Dev. Center, Matsushita Electron. Component Co., Ltd, Osaka, Japan (Takayama, R.; Nakanishi, H.; Sakuragawa, T.; Satoh, Y.; Kawasaki, T.)
Abstract	A band-switching SAW antenna duplexer has been studied as one of the candidate of a SAW antenna duplexer for CDMA based PCS in the United states (US-PCS). An antenna duplexer for US-PCS requires filters of very steep characteristic because of the very narrow cross-band width. However, it seemed difficult to develop a full band SAW duplexer consisting of normal ladder-type filters using a 36/spl deg/Y-cut LT substrate. Therefore, we proposed the band switching SAW duplexer for US-PCS. This duplexer consists of two duplexers: one for the lower 35 MHz band and the other for the upper 25 MHz band. These two duplexers were packed in a 9/spl times/7/spl times/1.5 mm/sup 3/ ceramic package, and switch circuits were formed on a circuit board. In addition, we used 4-layered AlMgCu/Ti/AlMgCu/Ti electrodes to deliver power durability. This duplexer satisfies required specifications for US-PCS and results indicate that it is one solution to developing a PCS duplexer with SAW filters.
Sponsorship	Ultransonics Ferroelectr., & Frequency Control Soc
Starting Page	119
Ending Page	122
File Size	2201063
Page Count	4
File Format	PDF
ISBN	0780375823
ISSN	10510117
DOI	10.1109/ULTSYM.2002.1193366
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-08
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface acoustic waves Personal communication networks Filters Switches Multiaccess communication Ceramics Packaging Switching circuits Printed circuits Electrodes
Content Type	Text
Resource Type	Article

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