Title :
Ferroelectric Lumped Element Filter/Switch for Microwave Applications
Author :
Wang, Xu ; Bao, Peng ; Lancaster, Michael J. ; Jackson, Tim J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Birmingham, Birmingham
Abstract :
This paper describes the experimental performance of a ferroelectric lumped element filter/switch grown on silicon substrate. The filtering/switching operation is based on the dc electric field controlled dielectric constant of a Ba0.25Sr0.75TiO3 (BST) thin-film. The switch is made by changing the cut-off frequency of a low-pass filter. 18 dB isolation has been demonstrated under 15 V bias at 25 GHz with great consistency being observed among different samples. The properties of the BST thin-film has been extracted by comparing the electromagnetic full-wave simulation with the experimental measurements.
Keywords :
barium compounds; ferroelectric devices; ferroelectric switching; ferroelectric thin films; low-pass filters; microwave filters; microwave switches; permittivity; strontium compounds; thin film devices; Ba0.25Sr0.75TiO3; cut-off frequency; dielectric constant; electromagnetic full-wave simulation; ferroelectric lumped element filter; ferroelectric lumped element switch; frequency 25 GHz; low-pass filter; thin film; voltage 15 V; Binary search trees; Dielectric constant; Dielectric substrates; Ferroelectric materials; Filtering; Low pass filters; Microwave filters; Silicon; Strontium; Switches;
Conference_Titel :
Microwave Conference, 2008. EuMC 2008. 38th European
Conference_Location :
Amsterdam
Print_ISBN :
978-2-87487-006-4
DOI :
10.1109/EUMC.2008.4751382
