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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 and personal communication systems has led to a number of pseudo-SAW (PSAW) and SH mode based SAW devices. These filters can operate at higher frequencies than SAW-based ones for a given line-width because PSAW and SH mode velocities can be significantly higher than corresponding SAW velocities. Furthermore for certain orientations the attenuation of the PSAW is acceptably small. In this paper the existence of an independent high-velocity pseudo-SAW (HVPSAW) mode is discussed. The HVPSAW is shown to have a phase velocity close to the longitudinal bulk wave velocity and to be quasi-longitudinally polarized. The nature of this HVPSAW mode is described for both electrically open-circuited and layered metallic short-circuited conditions for several piezoelectric materials. Numerical and experimental data are presented which discuss the existence and properties of these high-velocity pseudosurface waves.
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SH模式速度可以明显高于相应的SAW速度。此外，对于某些定向，PSAW的衰减很小。本文讨论了一种独立的高速伪SAW（HVPSAW）模式的存在。示出HVPSAW具有接近于纵向体波速度的相速度并且是准纵向极化的。对于几种压电材料的电开路和分层金属短路条件，都描述了这种HVPSAW模式的性质。给出了数值和实验数据，讨论了这些高速伪表面波的存在和性质。

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