An Analysis of an Equivalent Circuit Model for an Interdigital Surface-Acoustic-Wave Transducer

Kojima, Toshihiro; Shibayama, Kimio

doi:10.7567/jjaps.27s1.163

Cited by 42 publications

(20 citation statements)

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“…Having already identified the realization of L(z), we follow equation (25) and just take D ai ¼ ÀD T ub and B a ¼ C T b .…”

Section: 22mentioning

confidence: 99%

Network modelling of a class of Surface Acoustic Wave filters

Pauli

2007

Mathematical and Computer Modelling of Dynamical Systems

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We focus on the modelling aspects of a wide class of Surface Acoustic Wave (SAW) filters built by cascading two electro-acoustic transducer three-ports that convert electrical signals into acoustic waves on a piezoelectric substrate, and vice versa. It is this conversion of voltages or currents into acoustic waves that requires the use of mixed coordinates for the natural parameterization of SAW transducers. This modelling problem in mixed coordinates offers a variety of basic and interesting aspects that might be useful in other fields. On the level of a general black-box description, we develop a systematic theory of 'mixed' matrix representations including cascade decomposition, lossless or Darlington embedding, state-space realization, and additional constraints imposed by losslessness and reciprocity. Hereby, we identify Redheffer's star product and the pertaining linear fractional transformation as the main structural elements of the underlying matrix algebra. At the detailed level, we are not interested in the analysis and modelling of the various physical effects. Instead, we look for a linear network model that produces rational transfer functions and parameterizes them by physically measurable quantities (reflection and excitation coefficients), that is, we present a mathematically tractable network model for SAW filters that is simple enough to serve as the basis for the future solution of the synthesis problem of such structures under idealized assumptions.

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“…Having already identified the realization of L(z), we follow equation (25) and just take D ai ¼ ÀD T ub and B a ¼ C T b .…”

Section: 22mentioning

confidence: 99%

Network modelling of a class of Surface Acoustic Wave filters

Pauli

2007

Mathematical and Computer Modelling of Dynamical Systems

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“…The equivalent circuit model is a well-known technique to describe a SAW filter response and has been previously presented [13]- [15]. Most equivalent circuit models have been modified based on the Smith's equivalent circuit model [13] and are described for bulk SAW materials.…”

Section: Equivalent Circuit Modelmentioning

confidence: 99%

SAW device modeling including velocity dispersion based on ZnO/diamond/Si layered structures

Hachigo

Malocha

1998

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

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Surface acoustic wave (SAW) filter properties of ZnO/diamond/Si structures are calculated including velocity dispersion. The conventional SAW device modeling has previously been developed for bulk substrates. However, layered materials exhibit SAW velocity dispersion. The null frequency bandwidth of typical layered ZnO/diamond/Si structures is narrower than that calculated by conventional SAW device modeling techniques due to the velocity dispersion of the layered structures. The null frequency bandwidth of layered structures was calculated by the delta function model and the equivalent circuit model, including velocity dispersion, and compared with the experimental results. The dispersive equivalent circuit (DEC) model for layered structures is also presented. The results of these analysis are compared with the experimental results which show very good agreement.

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“…Figure 1 shows the configurations of various electrodes formed on a substrate and in a substrate of 10° rotated YX-LiNbO 3 , based on an analysis [13,14] using the finite element method (FEM). We fabricated a SAW resonator using a Cu electrode and confirmed that the configuration with an embedded electrode yielded greater bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐wideband SAW resonator composed of grooved Cu electrodes and its application to tunable filters

Kadota

Kimura

Ida

2013

Elect Comm in Japan

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A cognitive radio system, which is being investigated in order to use limited frequency resources effectively, requires a tunable filter with a wide variable frequency range. A wideband resonator is required to realize a tunable filter. It was reported that a resonator composed of a Cu electrode/15° YX-LiNbO 3 had a large bandwidth of 12%. We attempted to fabricate a one-port resonator composed of a grooved Cu electrode/4° YX-LiNbO 3 . This resonator was applied to a tunable filter, and a tunable filter having a tunable range of 6.8% in the center frequency was experimentally realized using a bandpass-type filter circuit, and one having a tunable range of 9 to 12% was theoretically realized using a ladder-type filter circuit.

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An Analysis of an Equivalent Circuit Model for an Interdigital Surface-Acoustic-Wave Transducer

Cited by 42 publications

References 0 publications

Network modelling of a class of Surface Acoustic Wave filters

Network modelling of a class of Surface Acoustic Wave filters

SAW device modeling including velocity dispersion based on ZnO/diamond/Si layered structures

Ultra‐wideband SAW resonator composed of grooved Cu electrodes and its application to tunable filters

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