H - Electricity – 03 – H
Patent
H - Electricity
03
H
333/58, 349/59.1
H03H 9/64 (2006.01) H01P 1/20 (2006.01) H03H 9/02 (2006.01) H03H 9/145 (2006.01)
Patent
CA 1176720
-9- PHB 32748 ABSTRACT A surface acoustic wave filter includes a length- weighted interdigital transducer (T1) to one side of which there are provided bus bar parts (BP1, BP2) which are within the acoustic aperture (A), which are inclined at an acute angle to the propagation path (P) and which closely follow the major lobe (L1). The bus bar parts (BP1 and BP2) each have a width (W) along the propagation path (P) defined by 2W=n .lambda./2 where n is an odd integer and .lambda. is the wavelength of surface acoustic waves at substantially the maximum amplitude response frequency of the transducer (T1). In this case the components of the surface acoustic waves reflected from the two edges of each inclined bus bar part (BP1 and BP2) along the propagation path (P), that is to say the component reflected waves (SW1) reflected from the edge closest to the overlap envelope and the com- ponent reflected waves (SW2) reflected from the edge which forms part of one end of the transducer, are in antiphase at that maximum response frequency and so spurious signals due to the component reflected waves (SW1 and SW2) at that frequency are substantially suppressed.
392595
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
LandOfFree
Acoustic wave devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acoustic wave devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic wave devices will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1241844