Solidly mounted resonators and filters

Author

Lakin, K.M. ; McCarron, K.T. ; Rose, R.E.

Author_Institution

TFR Technol. Inc., Redmond, OR, USA

Volume

2

fYear

1995

fDate

7-10 Nov 1995

Firstpage

905

Abstract

Acoustic resonators require material interfaces that confine waves to a finite volume in an efficient manner. Conventionally this is achieved by using air or vacuum interfaces at the electrodes. Another technique is to fabricate the resonator onto a set of quarter wavelength thick layers attached to a substrate to form a solidly mounted resonator (SMR). The SMR concept has been used to fabricate low insertion loss filters for GPS and other applications. Filters for GPS having less than 3 dB insertion loss and 40 dB out-of-band rejection have been demonstrated. These filters are composed of ladder networks with series and shunt resonators

Keywords

Global Positioning System; UHF filters; acoustic resonator filters; bulk acoustic wave devices; crystal resonators; ladder filters; 2.488 GHz; 3 dB; 900 MHz; GPS; acoustic resonators; bulk wave acoustic resonator; ladder networks; low insertion loss filters; material interfaces; out-of-band rejection; piezoelectric films; quarter wavelength thick layers; series resonators; shunt resonators; solidly mounted resonator; Bandwidth; Biomembranes; Electrodes; Etching; Frequency; Global Positioning System; Impedance; Insertion loss; Resonator filters; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495711

Filename

495711