Title :
Novel structures for low-loss slanted filters
Author :
Ivanov, Petr G. ; Makarov, Vladimir M. ; Liu, Wen
Author_Institution :
Moscow Eng. Phys. Inst., Russia
fDate :
10/1/2000 12:00:00 AM
Abstract :
New structures of slanted transducers are described. These structures are based on a variation of weighting along a filter aperture. The first quasi-rectangular structure has equal lengths but different numbers of fingers for every frequency channel. The second partially-weighted transducer comprises different weighting for lateral and central frequency channels. The use of such structure allows one to improve some filter parameters, such as insertion loss and metal pattern dimensions
Keywords :
losses; surface acoustic wave filters; surface acoustic wave transducers; SAW filters; filter aperture; filter parameters; frequency channel fingers; insertion loss; low-loss slanted filters; metal pattern dimensions; partially-weighted transducer; quasi-rectangular structure; slanted transducers; weighting variation; Acoustic transducers; Apertures; Band pass filters; Electrodes; Fingers; Frequency; Insertion loss; Surface acoustic waves; Transfer functions; Transversal filters;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922519
