A new theoretical approach for the coupling coefficient in the monolithic structures

Author

Mateescu, Irina ; Pop, Gabriela ; Ghita, Christinu

Author_Institution

Nat. Inst. of Mater. Phys., Bucharest, Romania

fYear

1998

fDate

27-29 May 1998

Firstpage

580

Lastpage

586

Abstract

Based on Tiersten´s analysis an accurate calculation of the coupling coefficient dependence on geometrical dimensions and mass-loading for quartz and langasite monolithic structures was performed. We have studied the effect of mass-loading on the coupling coefficient of langasite and quartz monolithic filters and we have found that the effect on langasite filters is tower than on quartz filters. A better agreement between input data and experimental attenuation characteristics is obtained when the rigorous theoretical approach is used in the calculation of the coupling coefficient. The relation between the coupling coefficient and the material constants is discussed on crystals grown by various laboratories

Keywords

coupled circuits; crystal filters; quartz; Tiersten´s analysis; attenuation characteristics; coupling coefficient; geometrical dimensions; langasite monolithic structures; mass-loading; quartz monolithic filters; Band pass filters; Bandwidth; Crystals; Design methodology; Electrodes; Frequency; Inductance; Lithium compounds; Piezoelectric devices; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International

Conference_Location

Pasadena, CA

ISSN

1075-6787

Print_ISBN

0-7803-4373-5

Type

conf

DOI

10.1109/FREQ.1998.717959

Filename

717959