Title :
Ferroelectric Tunable Bandpass Filters for Ka-Band Applications
Author :
Courrèges, Stanis ; Li, Yuan ; Zhao, Zhiyong ; Choi, Kwang ; Hunt, Andrew ; Papapolymerou, John
Author_Institution :
Sch. of Electr.&Comput. Eng., Georgia Inst. of Technol., Atlanta, GA
Abstract :
This paper presents two 3-pole tunable bandpass coplanar filters that include BST ferroelectric capacitors, tunable from 28 GHz up to 37 GHz. Both filters consist of cascaded coplanar transmission resonators, loaded with high-quality factor discrete BST capacitors. The first design includes 6 capacitors and the second one is loaded with 12 capacitors. The capacitance is varied from 60 fF up to 20 fF. A first fabrication was done only with fixed capacitances, in order to validate the model. The insertion loss was around 5 dB at 30 GHz.
Keywords :
band-pass filters; cascade networks; circuit tuning; ferroelectric capacitors; microwave filters; millimetre wave filters; resonator filters; 3-pole tunable bandpass coplanar filters; Ka-band application; cascaded coplanar transmission resonators; ferroelectric tunable bandpass filters; frequency 28 GHz to 37 GHz; high-quality factor discrete BST ferroelectric capacitor; Band pass filters; Binary search trees; Capacitance; Capacitors; Ferroelectric materials; Filter bank; Frequency; Q factor; Resonator filters; Tunable circuits and devices;
Conference_Titel :
Microwave Conference, 2008. EuMC 2008. 38th European
Conference_Location :
Amsterdam
Print_ISBN :
978-2-87487-006-4
DOI :
10.1109/EUMC.2008.4751385
