Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1335904
