A tunable differential duplexer in 90nm CMOS

An integrated duplexer for frequency division duplex wireless standards around 2GHz is presented. The duplexer utilizes a differential version of a planar hybrid transformer to enable wideband differential to differential and differential to common-mode isolation between the transmitter and receiver...

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Bibliographic Details
Main Authors: Abdelhalem, S. H., Gudem, P. S., Larson, L. E.
Format: Conference Proceeding
Language:English
Subjects:
Antennas
Cellular phones
CMOS process
Couplings
duplexers
Impedance
Insertion loss
Linearity
Loss measurement
Noise figure
tunable circuits and devices
WCDMA
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Summary:An integrated duplexer for frequency division duplex wireless standards around 2GHz is presented. The duplexer utilizes a differential version of a planar hybrid transformer to enable wideband differential to differential and differential to common-mode isolation between the transmitter and receiver. It covers WCDMA bands I, II, III, and IX, with worst-case isolation of 60dB and 40dB at the TX and RX frequencies respectively. The duplexer with a cascaded LNA achieves a noise figure of 5.6dB, and 14dB of gain. The insertion loss in the TX path is 3.7dB. The duplexer and LNA, implemented in a 90nm CMOS process, consume 20mA and occupy an active area of 0.6mm 2 .
ISSN:1529-2517
2375-0995
DOI:10.1109/RFIC.2012.6242241