Surface acoustic wave resonator

Details Surface acoustic wave resonator Surface acoustic wave resonator

1985-12-10

1987-01-06

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313D, 333196, H03H 925, H03H 9145

Patent

active

046350098

ABSTRACT:
An IDT is arranged at the center of a piezoelectric substrate formed of Li.sub.2 B.sub.4 O.sub.7 single crystals. Grating reflectors are arranged on either side of the IDT. The IDT and the grating reflectors are formed of 6,000 .ANG. thick aluminum films. The IDT comprises a pair of comb-shaped transducers having a plurality of electrode fingers which are arranged parallel to each other at equal distances, so that the electrode fingers of the respective transducers are alternately arranged. The grating reflectors have a plurality of reflective arrays arranged parallel to each other at equal distances. The pitch (Pg) between the reflective arrays of the grating reflectors, and the pitch (Pt) between the electrode fingers of the IDT is set to be 98.8% of half the wavelength of a surface acoustic wave in the resonance mode. Distance d between the IDT and the grating reflector is half the wavelength of a surface acoustic wave in the resonance mode. The total number of the electrode fingers of the IDT is 60 (30 pairs) and the total number of the reflective arrays of each grating reflector is 150 (the total number thereof is 300).

REFERENCES:
patent: 3886504 (1975-05-01), Hartmann et al.
patent: 4013983 (1977-03-01), Hartemann
patent: 4387355 (1983-06-01), Uno et al.
patent: 4454488 (1984-06-01), Hartmann

Affiliated with

Also associated with

Rating

Surface acoustic wave resonator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface acoustic wave resonator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave resonator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-686987