A design technique to enhance isolation of duplexer in single-ended and differential modes

J. Tsutsumi; S. Inoue; M. Iwaki; Motoaki Hara; H. Nakamura; K. Matsumoto; M. Ueda; Y. Satoh

doi:10.1109/ULTSYM.2011.0458

A design technique to enhance isolation of duplexer in single-ended and differential modes

J. Tsutsumi, S. Inoue, M. Iwaki, Motoaki Hara, H. Nakamura, K. Matsumoto, M. Ueda, Y. Satoh

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Citations (Scopus)

Abstract

This paper describes a design technique to enhance isolation of acoustic duplexers in the single-ended and the differential modes for a so-called "inter-stage SAW-less" radio frequency (RF) front-end of cellular phones. The leakage signal from the Tx to the Rx ports existing inside the duplexer, which degrades the isolation characteristics, is cancelled out by utilizing a proposed circuit topology and by performing careful design of the whole duplexer structure. The principle directly enhances the single-ended isolation, but it also contributes to improve the differential mode isolation. The prototypes for the single-ended and differential duplexers exhibit isolation higher than 70 dB and 65 dB, respectively, in the Tx band for UMTS Band 1 application.

Original language	English
Title of host publication	2011 IEEE International Ultrasonics Symposium, IUS 2011
Pages	1833-1836
Number of pages	4
DOIs	https://doi.org/10.1109/ULTSYM.2011.0458
Publication status	Published - 2011 Dec 1
Event	2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States Duration: 2011 Oct 18 → 2011 Oct 21

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Other

Other	2011 IEEE International Ultrasonics Symposium, IUS 2011
Country	United States
City	Orlando, FL
Period	11/10/18 → 11/10/21

Keywords

Duplexer
FBAR
SAW

ASJC Scopus subject areas

Acoustics and Ultrasonics

Access to Document

10.1109/ULTSYM.2011.0458

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Tsutsumi, J., Inoue, S., Iwaki, M., Hara, M., Nakamura, H., Matsumoto, K., Ueda, M., & Satoh, Y. (2011). A design technique to enhance isolation of duplexer in single-ended and differential modes. In 2011 IEEE International Ultrasonics Symposium, IUS 2011 (pp. 1833-1836). [6293263] (IEEE International Ultrasonics Symposium, IUS). https://doi.org/10.1109/ULTSYM.2011.0458

A design technique to enhance isolation of duplexer in single-ended and differential modes. / Tsutsumi, J.; Inoue, S.; Iwaki, M.; Hara, Motoaki; Nakamura, H.; Matsumoto, K.; Ueda, M.; Satoh, Y.

2011 IEEE International Ultrasonics Symposium, IUS 2011. 2011. p. 1833-1836 6293263 (IEEE International Ultrasonics Symposium, IUS).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Tsutsumi, J, Inoue, S, Iwaki, M, Hara, M, Nakamura, H, Matsumoto, K, Ueda, M & Satoh, Y 2011, A design technique to enhance isolation of duplexer in single-ended and differential modes. in 2011 IEEE International Ultrasonics Symposium, IUS 2011., 6293263, IEEE International Ultrasonics Symposium, IUS, pp. 1833-1836, 2011 IEEE International Ultrasonics Symposium, IUS 2011, Orlando, FL, United States, 11/10/18. https://doi.org/10.1109/ULTSYM.2011.0458

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