MONOLITHIC CRYSTAL FILTER

PROBLEM TO BE SOLVED: To provide excellent passing band characteristics by suppressing unwanted higher harmonic modes such as bending vibration and contour vibration generated near main vibration. SOLUTION: Excitation electrodes composed of input/output electrodes 11 and 12 and a common electrode ar...

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Bibliographic Details
Main Authors ARIMURA HIROYUKI, MAEDA HIROSHI
Format Patent
LanguageEnglish
Published 03.02.1998
Edition6
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:PROBLEM TO BE SOLVED: To provide excellent passing band characteristics by suppressing unwanted higher harmonic modes such as bending vibration and contour vibration generated near main vibration. SOLUTION: Excitation electrodes composed of input/output electrodes 11 and 12 and a common electrode are formed on a crystal plate 1 and peripheral electrodes 21 and 22 are formed around the excitation electrodes. The respective peripheral electrodes 21 and 22 are constituted to be the narrow width electrodes of a small area around the excitation electrode and turned to a thick width electrode whose area is enlarged more as being separated from the excitation electrode. By gradually enlarging the area, weighting is made different.
Bibliography:Application Number: JP19960206488