Title :
High rejection impedance element SAW filters realised on quartz and 42°-LiTaO3 substrates
Author :
Kondratiev, S.N. ; Thorvaldsson, T.
Author_Institution :
Temex-SAW, Neuchatel, Switzerland
Abstract :
This paper presents new results of high rejection Impedance Elements (IE) SAW filters in the 400-900 MHz frequency range realised on quartz and 42°-LiTaO3 substrates. Three different filters are used as examples of what can be achieved for various types of structures. For example a rejection level of better that 55 dB was achieved in a 5×5mm2 SMD package for a filter at 465 MHz with insertion loss as low as 1.5 dB. The paper describes some important design issues which make it possible to achieve such high rejection levels
Keywords :
UHF filters; ladder filters; lithium compounds; quartz; surface acoustic wave filters; 1.5 dB; 400 to 900 MHz; 465 MHz; LiTaO3; LiTaO3 substrates; SMD package; SiO2; balanced bridge type; high rejection impedance element SAW filters; insertion loss; ladder type; quartz substrates; Bandwidth; Bridges; Frequency; Impedance; Insertion loss; Loss measurement; Packaging; SAW filters; Shape; Substrates;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922518
