A Bleustein-Gulyaev-Shimizu Wave Resonator with 2 or 3 Resonances for Double Traps in TV and VCR (VTR)
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概要
- 論文の詳細を見る
A Bleustein-Gulyaev-Shimizu (BGS) wave with only a shear-horizontal (SH) displacement has the property of complete reflection at the free edge of a piezoelectric ceramic substrate. A BGS wave resonator utilizing this property is super-miniature and wide band, has a small capacitance ratio, and does not require frequency tuning. At present, two kinds of BGS resonators have been used as the additional traps at f ap and f as in TV·VCR VIF circuits. In this work, utilizing the responses generated due to the frequency characteristic of weighted IDT and even mode reflections at free edges of the substrate, we propose a new type of BGS resonator device which has two or three resonant frequencies for both f ap and f as. By applying this resonator in a VIF circuit, we have confirmed that it produces sufficient attenuations for practical use at both f ap and f as.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 1996-05-30
著者
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AGO Junya
Murata Mfg. Co. , Ltd.
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HORIUCHI Hideya
Murata Mfg. Co. , Ltd.
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Kadota Michio
Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto 617-8555, Japan
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Ago Junya
Murata Mfg. Co., Ltd., Nagaokakyo-shi, Kyoto 617, Japan
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