Transversely Coupled Resonator Filters Utilizing Reflection of Bleustein-Gulyaev-Shimizu Wave at Free Edges of Substrate

Abstract

To date, various connection rerouting methods for connection-oriented mobile networks have been proposed. The previous methods, however, are limited to specific topologies or environments. In this paper, we propose the connection-information-based rerouting widely applicable to various connection-oriented mobile networks. This method requires neither a specific topology nor a complex connection, enables fast rerouting, provides appropriate route optimality, and can be extended easily.

Characterization of Shear Horizontal Waves Using a 1D Laser Doppler Vibrometer

“…It was found to be . This is reasonable considering that the metallization of the IDT enhances the confinement of the wave to the substrate surface [ 40 ].…”

High-Frequency Edge Reflection Type Resonators with Excellent Temperature Characteristics

“…[13][14][15][16] The authors have developed and put to practical use resonators and multimode resonator filters for devices such as televisions, car radios, and ETC, by using the reflection of the SH wave at the edges of piezoelectric ceramic substrates. [15][16][17][18][19][20][21][22] Large ripples are generated when there are chipping or position errors at the edge. 13,15,16) The no-chipping and accurate positions at the edge are required as the frequency becomes higher.…”

Development of Substrate Structures and Processes for Practical Applications of Various Surface Acoustic Wave Devices

“…The author and coengineers developed technologies for solving these problems and put both resonators and resonator filters into practical use for the first time. [25][26][27][28][29]…”

“…As the result, transversely coupled resonator filters using the edge reflection of BGS/SH waves were realized for the first time in the world. [27][28][29] The 52 MHz IF filter developed for cordless telephones in the US is very small (package size: 4:5 Â 5:2 mm 2 ).…”