A Method of Broad-Band Matching to SAW-IDT (surface acoustic wave interdigital transducer)
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概要
- 論文の詳細を見る
A method is described for designing a broad-band matching network between IDT and electrical source or load, by use of only one transformer and one tuning inductor. The method is based upon both detuning the resonance frequency of the matching network and decreasing the network Q factor by the step-up transformer. Calculations show feasibility of SAW delay line having insertion loss (IL) of 2l dB, 3 dB fractional bandwidth (BW) of 55% and triple transit suppression (TTS) of 62 dB for 3 electrode (N=1) IDT. An exnerimental example shows IL=25 dB, BW-46.5% and TTS=61 dB around at 33 MHz, and confirms the theoretical predictions except for BW. The short IDT launchs spurious bulk modes and bulk longitudinal wave degrades substantially BW.
- 東京工芸大学の論文
著者
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Aoki Takeshi
Department Of Drug Safety Res. Eisai Co. Ltd.
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Aoki Takeshi
Department Of Electronics Tokyo Institute Of Polytechnics
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