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Efficient Design Tool for SAW-Resonator Filters

  • The advantages of the coupling-of-modes (COM) formalism and the transmission-matrix approach are combined to create exact and computationally efficient analysis and synthesis CAD tools for the design of SAW-resonator filters. The models for the filter components, especially gratings, interdigital transducers (IDTs). and multistrip couplers (MSCs), are based on the COM approach, which deliversThe advantages of the coupling-of-modes (COM) formalism and the transmission-matrix approach are combined to create exact and computationally efficient analysis and synthesis CAD tools for the design of SAW-resonator filters. The models for the filter components, especially gratings, interdigital transducers (IDTs). and multistrip couplers (MSCs), are based on the COM approach, which delivers closed-form expressions. In order to determine the relevant COM parameters, the integrated COM differential equations are compared with analytically derived expressions from the transmission-matrix approach. The most important second-order effects such as energy storage, propagation loss and mechanical and electrical loading are fully taken into account. As an example, the authors investigate a two-pole, acoustically coupled resonator filter at 914.5 MHz on AT quartz. Excellent agreement between theory and measurement is found.show moreshow less

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Metadaten
Document Type:Conference Proceeding
Title (English):Efficient Design Tool for SAW-Resonator Filters
Author:Gerd Scholl, Andreas ChristORCiDGND, Hans Peter Grassl, Werner Ruile, Peter Russer, Robert Weigel
Year of Publication:1989
Publisher:IEEE
First Page:135
Last Page:140
Parent Title (English):Ultrasonics Symposium Proceedings
DOI:https://doi.org/10.1109/ULTSYM.1989.66973
URL:https://ieeexplore.ieee.org/document/66973
Language:English
Institutes:Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019)
Tag:Closed-form solution; Couplers; Couplings; Design automation; Differential equations; Energy storage; Filters; Gratings; Propagation losses; Transducers
Open Access: Closed 
Licence (German):License LogoUrheberrechtlich geschützt
Comment:
Konferenz: IEEE Ultrasonics Symposium, 03-06 October 1989, Montreal, QC, Canada