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Electrically tunable split-ring resonators at microwave frequencies based on barium-strontium-titanate thick films

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7 Author(s)

Split-ring resonators (SRRs) implemented using ferroelectric materials to modify their resonance frequency by means of a tuning voltage are presented for the first time. SRRs have been used to load a microstrip transmission line on a multilayered substrate including a thick film of barium-strontium-titanate (BST) to obtain a tunable stopband response. The characteristics of the BST layer allow the application of 140 V as tuning voltage to obtain frequency tunability values of around 12.5 . The applied technology is suitable for the fabrication of cost-effective and reliable planar microwave devices.

Published in:
Electronics Letters  (Volume:45 ,  Issue: 8 )

Date of Publication: April 9 2009

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