Title :
A reconfigurable bandpass filter for RF/microwave multifunctional systems
Author :
Fathelbab, Wael M. ; Steer, Michael B.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
3/1/2005 12:00:00 AM
Abstract :
A network prototype suitable for reconfigurable filters with imaginary-axis transmission zeros is presented. The prototype is synthesized using classical cascade synthesis. Reconfiguration of the transmission zeros is implemented entirely by tunable capacitors. The measured performance of a narrow-band reconfigurable bandpass filter realized in a planar combline using varactor diodes demonstrates the principle.
Keywords :
band-pass filters; circuit tuning; microstrip filters; microwave filters; network synthesis; poles and zeros; varactors; RF/microwave multifunctional systems; imaginary axis transmission zeros; narrowband reconfigurable bandpass filter; planar combline filters; planar microstrip filter; tunable capacitors; varactor diodes; Band pass filters; Capacitors; Diodes; Filtering theory; Microwave filters; Narrowband; Network synthesis; Prototypes; Radio frequency; Varactors; Planar combline filters; reconfigurable transmission zeros; tunable capacitors;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.843502
