We developed two types of resonators (low Q type and high Q type). The low Q type BGS wave resonators have been evaluated as resonators for an additional trap and for an auto frequency tuning (AFT) in a video intermediate frequency (VIF) circuit of TV and VCRs, and as resonators for digital European cordless telephone (DECT) demodulator.

Abstract: A Bleustein-Gulyaev-Shimizu (BGS) wave has only a shear horizontal (SH) wave showing a complete reflection at a free edge of a substrate. By utilizing this property, a small BGS resonator having one resonance without reflector electrodes is realized.

Shear-horizontal (SH) surface acoustic waves (SAWs), such as the Love wave and the Bleustein–Gulyaev–Shimizu (BGS) wave, are now being widely used in resonators and filters for various electronic and communication systems throughout the

1996年5月30日 · A Bleustein-Gulyaev-Shimizu (BGS) wave having only shear horizontal (SH) component has the characteristic of complete reflection at the free edges of a substrate...

1992年1月1日 · The BGS wave has generally a large electromechanical coupling factor and a characteristic of complete reflection at stress-free edges of substrates. Therefore, a broad-band super-miniature resonator with a small capacitance ratio can be made utilizing the free-edge reflection property of a BGS wave.

1992年1月1日 · 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...

1996年5月30日 · A Bleustein-Gulyaev-Shimizu (BGS) wave having only shear horizontal (SH) component has the characteristic of complete reflection at the free edges of a substrate with...

Shimizu wave (BGS wave) [1, 2, 3] have several important features compared to conventional Rayleigh-type SAWs. For example, SH-type SAWs sometimes possess larger piezoelectricity than Rayleigh-type SAWs on the same sub­ strate material. When the SV-type BAW is slow-shear, SH-type SAW usually leaky.

A Bleustein-Gulyaev-Shimizu (BGS) wave has only a shear horizontal (SH) wave showing a complete reflection at a free edge of a substrate. In this paper, using the responses exited by a weighted interdigital transducer (IDT) and generated by the 2N/spl plusmn/2th mode complete reflections at free edges of a ceramic substrate, we realized a new ...

1992年1月1日 · A BGS wave resonator using PZT was developed for use as a resonator for an additional trap at fas (adjacent sound carrier frequency) in VIF circuits of TV sets and VCRs. Testing as a trap device in VIF showed that this device has better properties than LC trap circuits.