Longitudinally coupled surface acoustic wave filter

H - Electricity – 03 – H

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H03H 9/64 (2006.01) H03H 9/02 (2006.01)

Patent

CA 2375596

A surface acoustic wave filter which is easy to design and manufacture and whose attenuation ratio is improved by reducing the spurious near the passband. A vertical-coupling multimode surface acoustic wave device has comb- shaped electrodes IDTs (3, 4 and 5) provided on a piezoelectric substrate (1) and reflectors (2 and 6) which are composed of short-circuit grating electrodes with pitches different from the pitches of the IDTs and provided on both the sides of the IDTs. The reflectors each have electrode groups (101 and 102) in which the number of electrodes are so weighted in accordance with the position in the direction perpendicular to the propagation direction of the surface acoustic wave as to change linearly.

L'invention concerne un filtre à ondes acoustiques de surface dont la conception et la production sont aisées et dont le coefficient d'atténuation est amélioré par réduction des parasites à proximité de la bande passante. Un dispositif à ondes acoustiques de surface multimode à couplage vertical présente des transducteurs interdigités à électrodes en peigne (3,4, et 5) montés sur un substrat piézo-électrique (1) et des réflecteurs (2 et 6) comprenant des électrodes en réseau de court-circuit, dont les pas diffèrent de ceux des transducteurs interdigités et se trouvent sur les deux faces des transducteurs interdigités. Chaque réflecteur présente un groupe d'électrodes (101 et 102) dont le nombre d'électrodes est pondéré en fonction de la position dans le sens perpendiculaire au sens de propagation des ondes acoustiques de surface, de manière à varier de manière linéaire.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Longitudinally coupled surface acoustic wave filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFCA-PAI-O-1455071

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.