Premium
A complete UMTS transmitter using BAW filters and duplexer: A 90‐nm CMOS digital RF signal generator and a 0.25‐μm BiCMOS power amplifier
Author(s) -
Flament Axel,
Frappé Antoine,
Stefanelli Bruno,
Kaiser Andreas,
Cathelin Andreia,
Giraud Sylvain,
Chatras Matthieu,
Bila Stephane,
Cros Dominique,
David Jean Baptiste,
Leyssenne Laurent,
Kerhervé Eric
Publication year - 2011
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20551
Subject(s) - duplexer , electrical engineering , insertion loss , transmitter , cmos , materials science , radio frequency , electronic filter , electronic engineering , optoelectronics , engineering , channel (broadcasting) , voltage , antenna (radio)
A complete UMTS transmitter is proposed. It is composed of a radiofrequency (RF) signal generator, a power stage, and a bulk acoustic wave (BAW) duplexer. The 90‐nm CMOS digital RF signal generator is based on a third‐order delta‐sigma modulator using innovative design techniques to increase work frequency and a BAW filter to get rid of out‐of‐band quantization noise. The filter exhibits very high rejection, 3 dB of insertion losses at 1.95 GHz for a 3% fractional bandwidth. The 0.25‐μm BiCMOS power stage feeds a BAW duplexer that allows to share a common between W‐CDMA emission and reception. This 4 × 4 mm 2 duplexer, built with flip‐chipped BAW on glass substrate, ensures good isolation. The full transmitter measurements show the compliance with respect to spurious emissions in the different frequency bands and an EVM measurement at the state of the art (<5%). © 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2011.