Title :
Tunable RF filters using thin film barium strontium titanate based capacitors
Author :
Tombak, A. ; Ayguavives, F.T. ; Maria, J.-P. ; Stauf, G.T. ; Kingon, A.I. ; Mortazawi, A.
Author_Institution :
Dept. of Electr. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
Tunable lowpass and bandpass filters based on barium strontium titanate (BST) capacitors are reported. For the lowpass filter, 40% tunability was achieved at 9 V. Intermodulation distortion generated by the lowpass filters was also measured and predicted using a nonlinear model for the BST capacitors. The bandpass filter showed 45% tunability with an applied DC bias of 10 V.
Keywords :
UHF filters; band-pass filters; barium compounds; circuit tuning; ferroelectric thin films; intermodulation distortion; low-pass filters; microwave filters; strontium compounds; varactors; (BaSr)TiO/sub 3/; 10 V; 9 V; applied DC bias; bandpass filters; ferroelectric thin films; intermodulation distortion; lowpass filters; nonlinear model; tunable RF filters; varactors; Band pass filters; Barium; Binary search trees; Capacitors; Distortion measurement; Intermodulation distortion; Radio frequency; Strontium; Titanium compounds; Transistors;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967176
