Tuneable Electromagnetic Bandgap structures based on Ba/sub 0.25/Sr/sub 0.75/TiO/sub 3/ parallel-plate varactors on silicon Coplanar Waveguides
Paper in proceeding, 2003

Experimental performance of Electromagnetic Band Gap (EBG) structures, based on Coplanar Waveguides (CPW) periodically loaded by high-Q-factor ferroelectric varactors is reported. The varactors are made of Ba/sub 0.25/Sr/sub 0.75/TiO/sub 3/ films grown by laser ablation on thick Pt/Au/Pt electrodes. Due to the thick bottom electrodes the varactors have Q-factor larger than 40 at 45 GHz, which is higher in comparison with semiconductor varactors. Up to 30% tuning of the pass band edge is achieved at -20 dB level under 25V DC bias

ferroelectric devices

barium compounds

ferroelectric materials

microwave propagation


ferroelectric thin films

strontium compounds

coplanar waveguides




Dan Kuylenstierna

Department of Microelectronics and Nanoscience

Andrei Vorobiev

Department of Microelectronics and Nanoscience

G. Subramanyam

Spartak Gevorgian

Department of Microelectronics and Nanoscience

33rd European Microwave Conference Proceedings, 7-9 Oct. 2003

Vol. Vol.3 1111-14
1580538347 (ISBN)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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