Title :
Bulk acoustic wave filters synthesis and optimization for multi-standard communication terminals
Author :
Giraud, Sylvain ; Bila, Stéphane ; Chatras, Matthieu ; Cros, Dominique ; Aubourg, Michel
Author_Institution :
Univ. de Limoges/Centre Nat. de la Rech. Sci., Limoges, France
Abstract :
This article presents a design methodology for bulk acoustic wave (BAW) filters. First, an overview of BAW physical principles, BAW filter synthesis, and the modified Butterworth-van Dyke model are addressed. Next, design and optimization methodology is presented and applied to a mixed ladder-lattice BAW bandpass filter for the Universal Mobile Telecommunications System (UMTS) TX-band at 1.95 GHz and to ladder and lattice BAW bandpass filters for the DCS1800 TX-band at 1.75 GHz. In each case, BAW filters are based on AlN resonators. UMTS filter is designed with conventional molybdenum electrodes whereas DCS filters electrodes are made with innovative iridium.
Keywords :
bulk acoustic wave devices; ladder filters; lattice filters; telecommunication terminals; ultrasonics; BAW filter design; BAW filter optimisation; BAW filter synthesis; BAW physical principles; DCS BAW filters; DCS1800 TX-band; UMTS BAW filter; UMTS TX-band; Universal Mobile Telecommunications System; aluminium nitride resonators; bulk acoustic wave; frequency 1.75 GHz; frequency 1.95 GHz; iridium electrodes; ladder BAW bandpass filters; lattice BAW bandpass filters; mixed ladder-lattice BAW bandpass filter; modified Butterworth-van Dyke model; molybdenum electrodes; multistandard communication terminals; 3G mobile communication; Acoustic waves; Band pass filters; Design methodology; Design optimization; Distributed control; Electrodes; Lattices; Levee; Resonator filters; Acoustics; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Filtration; Micro-Electrical-Mechanical Systems; Reproducibility of Results; Sensitivity and Specificity; Telecommunications;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2010.1378
