Coupling-of-modes modelling for fast and precise simulation of leaky surface acoustic wave devices

Hashimoto, Ken–ya; Endoh, G.; Yamaguchi, M.

doi:10.1109/ultsym.1995.495577

Cited by 26 publications

(10 citation statements)

References 11 publications

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“…We first describe the coupling-of-modes (COM) model approach used for analysis of one-port SAW resonator. Compared with other models for the design and analysis of SAW devices, the COM model provides an efficient and highly flexible approach for modeling various types of electrodes, and it has been used widely in modeling nondispersive SAW devices for many years [5]- [7]. Parameters of the COM differential equations usually are obtained by measurements or by borrowing from same related theoretical modeling [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Frequency Response of IDT/ZnO/Si SAW Filter Using the Coupling of Modes Model

Ntagwirumugara

Gryba

Zhang

et al. 2007

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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A monolithic integration of filters on Si or GaAs substrates is highly desirable to miniaturize the outer dimensions of the cellular phones. But, direct monolithic integration of surface acoustic wave (SAW) filters is impossible with Si, which is nonpiezoelectric, and difficult with GaAs, which is weakly piezoelectric. One alternative is the deposition of a piezoelectric film on the semiconductor substrate. In this paper, we propose a modified coupling-ofmodes (COM) approach, which can be used in the practical design of a layered ZnO/Si SAW filter. This is a dispersive SAW-layered filter, and some of the COM parameters become frequency dependent due to the phase velocity dispersion. The frequency response of the 3-step ladder type ZnO/Si SAW filter is analyzed and compared with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Analysis of Frequency Response of IDT/ZnO/Si SAW Filter Using the Coupling of Modes Model

Ntagwirumugara

Gryba

Zhang

et al. 2007

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Compared with other models for the design and analysis of SAW devices, the coupling of modes (COM) model provides an efficient and highly flexible approach for modeling various types of electrodes, and has been used widely in modeling no dispersive SAW devices for many years [5]. Parameters of the COM differential equations are usually obtained by measurements or by borrowing from same related theoretical modeling [6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of 945 MHz Band Film Surface Acoustic Wave Resonators Using ZnO Thin Film with Si Substrate

Ntagwirumugara

Gryba

Zhang

et al. 2007

2007 IEEE International Frequency Control Symposium Joint With the 21st European Frequency and Time Forum

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This paper, we present the analysis of a ladder-type filter, in the frequency band of 945MHz, developed on a structure with two layers of a ZnO film on a Silicon substrate with aluminum (Al) IDTs using coupling of modes (COM) theory. The case of a layer ZnO deposited on a not-piezoelectric substrate, [111]-[110]-Si is examined. Although silicon is no piezoelectric, the configuration gives for the modes of surface of a higher order, the coupling coefficients K2 of about 5.5% (quite higher than the maximum value obtained for ZnO alone 1%) with the metallization coefficient of 0.5. We presents the optimization of the characteristics SAW, in particular by the choice of:-the thickness of the piezoelectric layer,-localization of IDTs,-the metallization or not of surface or interface,-crystalline orientation of the substrate and propagation direction, -the thickness of the fingers of IDT. The transfer function of SAW ladder type filter resonators (6 resonators) is presented, analyzed and compared with the experimental results. This frequency response confirms that it is possible to integrate on Si substrate the filters use for GSM and DECT systems.

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“…II, has been simulated on the neutral test and on the quasiapplication PCB structure using techniques explained in [3][4][5]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

“…A combination of commercial field simulators for PCB and package simulation and proprietary tools for SAW chip simulation has proven best for this purpose [3][4][5]. Fig.…”

Section: Characterization Of Relevant Effects By Measurement and mentioning

confidence: 99%

Optimized test PCBs for SAW / FBAR RF filters

Bilzer¹,

Pitschi²,

Kiwitt³

et al.

IEEE Ultrasonics Symposium, 2004

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-The characterization of the precise performance of packaged SAW RF filters is an extremely difficult task, due to their high complexity and high performance. If printed circuit boards (PCBs) for testing the filters are not carefully designed, they presumably show parasitic effects influencing the measurement results of the overall system consisting of PCB and filter. Actually, commonly used application environments exhibit different electromagnetic properties, and so the characterization may not be valid.This paper presents a new approach to design physically different PCBs in such a way that SAW RF components exhibit identical performance. The new approach is based on the concept of using optimized test environments, i.e., test environments with minimal reflections, minimal cross-talk, and minimal losses, in order to obtain the pure filter characteristics. The applicability and advantages of the new approach are exemplified.

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Coupling-of-modes modelling for fast and precise simulation of leaky surface acoustic wave devices

Cited by 26 publications

References 11 publications

Analysis of Frequency Response of IDT/ZnO/Si SAW Filter Using the Coupling of Modes Model

Analysis of Frequency Response of IDT/ZnO/Si SAW Filter Using the Coupling of Modes Model

Fabrication of 945 MHz Band Film Surface Acoustic Wave Resonators Using ZnO Thin Film with Si Substrate

Optimized test PCBs for SAW / FBAR RF filters

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