Balanced lattice-ladder bandpass filter in bulk acoustic wave technology

Author

ten Dolle, H.K.J. ; Lobeek, J.W. ; Tuinhout, A. ; Foekema, J.

Author_Institution

Innovation Center RF, Philips Semicond., Nijmegen, Netherlands

Volume

1

fYear

2004

fDate

6-11 June 2004

Firstpage

391

Abstract

We present a highly selective balanced bandpass filter based on solidly mounted bulk acoustic wave (BAW) technology. The filter consists of four BAW resonators electrically coupled in lattice topology cascaded with three BAW resonators in balanced ladder topology and is fabricated as chip scale package suitable for flip-chip assembly. Impedance transformation from 50 Ω to 150 Ω is realized. The small size, low in-band insertion loss, sharp roll-off and high stop-band rejection make this filter an ideal choice as Rx filter in wireless communication applications at 2 GHz.

Keywords

acoustic resonator filters; band-pass filters; bulk acoustic wave devices; chip scale packaging; ladder filters; 2 GHz; 50 to 150 ohms; BAW resonators; Rx filter; balanced bandpass filter; balanced ladder topology; balanced lattice; bulk acoustic wave technology; chip scale package; flip-chip assembly; highly selective bandpass filter; impedance transformation; in-band insertion loss; ladder bandpass filter; resonator cascading; resonator filters; roll-off; solid mounting; stop-band rejection; wireless communication applications; Acoustic waves; Assembly; Band pass filters; Chip scale packaging; Couplings; Impedance; Insertion loss; Lattices; Resonator filters; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1335904

Filename

1335904