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The numerical analysis of general SAW and leaky wave devices using approximate Green's function representations
1COM D EV, Cambridge, ON, Canada. robert.peach@comdev.ca
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|November 28, 2009
Summary
This study introduces efficient computational methods for analyzing complex surface acoustic wave (SAW) devices. The new approach significantly reduces computational cost, enabling accurate analysis of intricate electrode structures.
Area of Science:
- Physics
- Electrical Engineering
- Materials Science
Background:
- Rigorous analysis of surface acoustic wave (SAW) devices is crucial for advanced applications.
- The Green's function or boundary element method (BEM) offers high accuracy but is computationally expensive for complex structures.
- Existing methods struggle with nonperiodic electrode configurations in SAW devices.
Purpose of the Study:
- To develop computationally efficient methods for rigorous analysis of SAW devices with complex electrode structures.
- To enable the application of Green's function-based analysis to previously intractable device designs.
- To present practical computational procedures that leverage approximate Green's functions.
Main Methods:
- Employed approximate forms of the Green's function derived from rigorous representations.
- Developed computational procedures exploiting the structure of approximate Green's functions.
- Constructed efficient algorithms with linear computational effort scaling with the number of electrodes.
Main Results:
- Achieved highly efficient computational algorithms for SAW device analysis.
- Demonstrated linear scalability of computational effort with the number of electrodes.
- Validated the method's applicability to various device structures without empirical parameters.
Conclusions:
- The proposed approximate Green's function method provides an efficient and accurate approach for SAW device analysis.
- The method is versatile, applicable to any substrate, acoustic wave, and device structure.
- Excellent agreement between theoretical predictions and experimental results was achieved for complex longitudinally coupled resonator filter (LCRF) designs.
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