NDLI: Radio-frequency bulk acoustic wave duplexer with a differential receiver port

Content Provider	IEEE Xplore Digital Library
Author	Hao Zhang Wei Pang
Copyright Year	2010
Description	Author affiliation: College of Precision Instrument and Opto-electronics Engineering, Tianjin University, 92 Weijin Road, Nankai District, China 300072 (Hao Zhang; Wei Pang)
Abstract	This paper presents a novel bulk acoustic wave (BAW) duplexer with a single-ended to differential receiver (Rx) filter. The single-ended to differential Rx filter uses a single-ended ladder section on the antenna side of the Rx path to provide the proper impedance in the transmitter (Tx) band as to not load the Tx hurting its performance in the duplexer. Then a balun follows the initial ladder section to convert single-ended to differential. Finally a lattice filter follows with its small size and beneficial rejection. Taking full advantage of the characteristics of ladder and lattice structures respectively, the filter features low insertion loss, steep near-band skirts and deep out-of-band attenuations. As an optimal implementation the ladder, the balun and the lattice sections have been fabricated on a single die. This novel “balun in the middle of the filter” solution provides the best combination of loss, size and functionality in a duplexer.
Starting Page	916
Ending Page	919
File Size	726895
Page Count	4
File Format	PDF
ISBN	9781424475902
e-ISBN	9784902339215
e-ISBN	9781902339222
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-07
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	IEICE Institute of Electronics Informati
Subject Keyword	Resonator filters Microwave filters Impedance matching Lattices Inductors Capacitors Insertion loss Mode Conversion BAW Duplexer Filter Differential
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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