Title :
A quasi-elliptic ferroelectric tunable filter for X-band applications
Author :
Courrèges, Stanis ; Zhao, Zhiyong ; Choi, Kwang ; Hunt, Andrew ; Papapolymerou, John
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol. (GaTech), Atlanta, GA, USA
fDate :
Sept. 29 2009-Oct. 1 2009
Abstract :
A 4-pole quasi-elliptic ferroelectric tunable filter working in X-band is presented in this paper. The compact and low-loss filter is designed with high-Q ferroelectric BST capacitors and open-loop resonators. The fabricated filter has a center frequency of 9.37 GHz with a frequency tuning range of 690 MHz (7.4%) when a DC bias voltage of 30 V is applied. The filter has a fractional 1-dB bandwidth ranging from 11.4% to 13.8%. The measured insertion loss and return loss are 3.3-1.4 dB and 17-11 dB, respectively, with a DC bias range of 0 to 30 V. The output IP3 values are greater than 20 dBm from 0 V to 30 V.
Keywords :
barium compounds; ferroelectric capacitors; microwave filters; resonators; strontium compounds; BaSrTiO3; DC bias voltage; X-band; high-Q ferroelectric BST capacitors; insertion loss; low-loss filter; open loop resonators; quasielliptic ferroelectric tunable filter; return loss; voltage 30 V; Bandwidth; Binary search trees; Capacitors; Ferroelectric materials; Frequency; Insertion loss; Loss measurement; Resonator filters; Tuning; Voltage;
Conference_Titel :
Microwave Conference, 2009. EuMC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4748-0
