Bulk acoustic wave filters synthesis and optimization for multi-standard communication terminals

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 57; no. 1; pp. 52 - 58
• Main Authors: Giraud, S., Bila, S., Chatras, M., Cros, D., Aubourg, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.01.2010; Institute of Electrical and Electronics Engineers
• Subjects: 3G mobile communication; Acoustic wave devices, piezoelectric and piezoresistive devices; Acoustic waves; Acoustics; Acoustics - instrumentation; Applied sciences; Band pass filters; Bandpass filters; Computer-Aided Design; Design engineering; Design methodology; Design optimization; Distributed control; Electrodes; Electronics; Engineering Sciences; Equipment Design; Equipment Failure Analysis; Exact sciences and technology; Filtration - instrumentation; Fundamental areas of phenomenology (including applications); Lattices; Levee; Methodology; Micro-Electrical-Mechanical Systems - instrumentation; Molybdenum; Optimization; Physics; Reproducibility of Results; Resonator filters; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Sensitivity and Specificity; Synthesis; Telecommunications - instrumentation; Transduction; acoustical devices for the generation and reproduction of sound; Ladder circuit; Aluminium nitride; Bulk wave; Band pass filter; Acoustic wave filter; Modeling; Molybdenum; Optimization; Radio communication
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/TUFFC.2010.1378

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.