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Title: Tunability of bulk acoustic wave filters using CMOS transistors: concept, design and implementation
Authors: Hassan, Moustapha El 
Kerherve, Eric
Deval, Y
David, J.B.
Belot, Didier
Affiliations: Department of Electrical Engineering 
Keywords: Bulk acoustic wave devices
CMOS integrated circuits
Resonator filters
Subjects: Wireless LANs
Issue Date: 2010
Publisher: IEEE
Part of: IEEE Radio Frequency Integrated Circuits Symposium
Start page: 241
End page: 244
Conference: IEEE Radio Frequency Integrated Circuits Symposium (23-25 May 2010 : Anaheim, CA, USA) 
This paper presents the feasibility of a new method to tune the Bulk Acoustic Wave - Solidly Mounted Resonator (BAW-SMR) filters by adding capacitors to the shunt resonators and by controlling these capacitors using CMOS transistors that act as switches. The tunable BAWSMR filter is realized in a ladder topology. It is used for the 802.11b/g standard (2.40 – 2.48 GHz). Mainly, the filter fulfills the requirements for the WLAN 802.11 b/g standard, presenting a measured −3.3 dB of insertion loss, −12.7 dB of return loss and selectivity higher than 33 dB @ ± 30 MHz of the bandwidth. Moreover, a measured shift of 0.5% of the centre frequency (2.44 GHz) towards higher frequencies is obtained. This tunable BAW-SMR filter has reduced dimensions (1035*1075 µm2).
Ezproxy URL: Link to full text
Type: Conference Paper
Appears in Collections:Department of Electrical Engineering

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