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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >High velocity pseudosurface waves (HVPSAW)
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High velocity pseudosurface waves (HVPSAW)

机译：高速伪面波（HVPSAW）

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摘要

Current interest in low-loss UHF filters for use in mobile andnpersonal communication systems has led to a number of pseudo-SAW (PSAW)nand SH mode based SAW devices. These filters can operate at highernfrequencies than SAW-based ones for a given line-width because PSAW andnSH mode velocities can be significantly higher than corresponding SAWnvelocities. Furthermore for certain orientations the attenuation of thenPSAW is acceptably small. In this paper the existence of an independentnhigh-velocity pseudo-SAW (HVPSAW) mode is discussed. The HVPSAW is shownnto have a phase velocity close to the longitudinal bulk wave velocitynand to be quasi-longitudinally polarized. The nature of this HVPSAW modenis described for both electrically open-circuited and layered metallicnshort-circuited conditions for several piezoelectric materials.nNumerical and experimental data are presented which discuss thenexistence and properties of these high-velocity pseudosurfacenwaves
机译：当前对于在移动和个人通信系统中使用的低损耗UHF滤波器的兴趣导致了许多基于伪SAW（PSAW）和SH模式的SAW设备。对于给定的线宽，这些滤波器可以以比基于SAW的滤波器更高的频率工作，因为PSAW和nSH模式速度可以明显高于相应的SAW速度。此外，对于某些取向，然后PSAW的衰减很小。本文讨论了独立的高速伪SAW（HVPSAW）模式的存在。示出HVPSAW具有接近于纵向体波速度n的相速度并且被准纵向极化。该HVPSAW模式的性质描述了几种压电材料在电开路和分层金属短路条件下的特性。提供了数值和实验数据，讨论了这些高速伪表面波的存在和性质。

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