Design of Gallium Phosphate Surface Acoustic Wave Resonator Using Finite Element Method
The research into Surface Acoustic Wave (SAW) devices began in the early 1970s and led to the development of high performance, small size, rigorous and high reproducibility devices. SAW devices have been recognized for their versatility and efficiency in controlling and processing of electrical s...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/7365/1/FK_2009_55a.pdf |
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| Summary: | The research into Surface Acoustic Wave (SAW) devices began in the early 1970s
and led to the development of high performance, small size, rigorous and high
reproducibility devices. SAW devices have been recognized for their versatility and
efficiency in controlling and processing of electrical signals. Much research has now
been done on the application of such devices to consumer electronic, communication
systems and process function, such as delay lines, filters, resonator, and pulse
compressors.
The use of novel material, such as Gallium phosphate (GaPO4), extends the operating
temperature of the SAW elements. In this thesis SAW devices based on this new
material, operating at resonance frequency of 433.92 MHz been studied for passive
wireless application. The SAW devices consist of interdigital transducer (IDT) with
1.4 μm finger gap ratio of 1:1 of platinum and under-layer of chromium metallization.
A modeling using lumped equivalent circuit (LEC) of the device and finite element modeling (FEM) was done. The frequency responses of device were simulated by Sparameter
and impedance.
The impedance was used to study the mass loading effect of the Platinum electrodes
of the SAW devices. The analysis of the result shows that the mass loading affects the
resonant frequency of the SAW device. Furthermore, the results show that FEM
approach is more precise than LEC for design and simulation of SAW resonator. |
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