Title :
A Ka-Band Electronically Tunable Ferroelectric Filter
Author :
Courrèges, Stanis ; Li, Yuan ; Zhao, Zhiyong ; Choi, Kwang ; Hunt, Andrew ; Horst, Stephen ; Cressler, John D. ; Papapolymerou, John
Author_Institution :
Sch. of Electr. & Comput. Eng. (ECE), Georgia Inst. of Technol., Atlanta, GA
fDate :
6/1/2009 12:00:00 AM
Abstract :
This letter presents a three-pole tunable Ka-band coplanar filter that includes six high-Q BST ferroelectric capacitors. It tunes from 29 GHz up to 34 GHz (17%) with low bias voltages ranging from 0 V to 30 V. The filter has fractional bandwidths of 9.5-12.2%. It has a good insertion loss for this category of Ka-band ferroelectric filters, which is between 6.9 dB (0 V) and 2.5 dB (30 V). Two tone measurements showed that the filter has a minimum OIP3 of 15 dBm between 0 V and 30 V. The highest OIP3 value is 26 dBm achieved at a dc bias of 30 V.
Keywords :
barium compounds; coplanar waveguide components; ferroelectric capacitors; ferroelectric devices; microwave filters; strontium compounds; BaSrTiO3; Ka-band electronically tunable ferroelectric filter; frequency 26.5 GHz to 40 GHz; high-Q BST ferroelectric capacitors; three-pole tunable Ka-band coplanar filter; two tone measurements; voltage 0 V to 30 V; Barium strontium titanate (BST);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2009.2020012
