Chip type piezoelectric filter having internal common electrodes

Details Chip type piezoelectric filter having internal common electrodes Chip type piezoelectric filter having internal common electrodes

1998-03-30

2000-01-04

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333187, 310349, 310366, H03H 958, H03H 905

Patent

active

060114517

ABSTRACT:
A chip type filter reduces a required mount space while facilitating achievement of impedance matching and also enhancing the stability of filter characteristics. The chip type filter includes a first piezoelectric substrate, a filter section with resonance electrodes, a common electrode and a coupling capacitance section, a second piezoelectric substrate, a second filter section with a pair of resonance electrodes, a common electrode opposing the electrodes in a "top/bottom-surface overlap" relationship and a coupling capacitance section. The filter is arranged such that the first and second piezoelectric substrates are adhered to each other with an adhesive layer located therebetween.

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