Title :
Half percent bandwidth coupled resonator filter design
Author :
Thompson, D.F. ; Wright, P.V.
Author_Institution :
RF Monolithics, Dallas, TX, USA
Abstract :
The results of a research and development effort designed to extend the bandwidth limitation of quartz-coupled resonator filters beyond a half percent are reported. The theoretical operation and design of coupled resonator filters are discussed from both a time-domain and frequency-domain point of view, with special attention devoted to the requirements for maximizing the filter bandwidth. Several devices extending over a range of frequencies are analyzed with a coupling of modes model, and then fabricated on rotated Y-cut quartz utilizing the X-propagating surface acoustic wave. Experimental and theoretical results are presented in both the time and frequency domain for filters with bandwidths up to 0.6%
Keywords :
acoustic resonators; crystal resonators; frequency response; frequency-domain synthesis; surface acoustic wave filters; time-domain synthesis; ultrasonic transducers; SiO2; X-propagating surface acoustic wave; bandwidth limitation; coupled resonator filter design; coupling of modes model; filter bandwidth; frequency response; frequency-domain; half percent bandwidth; quartz-coupled resonator filters; rotated Y-cut quartz; time-domain; transducer structure; Acoustic transducers; Bandwidth; Costs; Coupling circuits; Frequency response; Gratings; Paper technology; Resonator filters; Surface acoustic waves; VHF circuits;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.276053
