Title :
Tunable electromagnetic bandgap structures based on ferroelectric films
Author :
Kuylenstierna, D. ; Vorobiev, A. ; Subramanyam, G. ; Gevorgian, S.
Author_Institution :
Dept. of Microelectron., Chalmers Univ., Gothenburg, Sweden
Abstract :
This work reports on an experimental tunable electromagnetic bandgap array based on SrTiO/sub 3/ (STO) films grown on a Pt coated silicon substrate. The structure, which is a periodically loaded coplanar waveguide (CPW), has its first rejection band between 30 and 40 GHz. Without DC bias, the center of the rejection band is at 35.5 GHz and the insertion loss is 38 dB. At applied 20 V DC bias the center frequency tunes about 4% due to the change in dielectric constant of STO.
Keywords :
coplanar waveguides; dielectric-loaded waveguides; ferroelectric thin films; microwave photonics; periodic structures; permittivity; photonic band gap; strontium compounds; titanium compounds; tuning; 20 V; 30 to 40 GHz; 35.5 GHz; 38 dB; CPW; DC bias; Pt coated silicon substrate; STO dielectric constant; STO films; Si; SrTiO/sub 3/ films; SrTiO/sub 3/-Pt-Si; center frequency tuning; electromagnetic bandgap array; ferroelectric films; first rejection band; insertion loss; periodically loaded coplanar waveguide; tunable electromagnetic bandgap structures; Coplanar waveguides; Dielectric constant; Electromagnetic waveguides; Ferroelectric films; Frequency; Insertion loss; Loaded waveguides; Periodic structures; Semiconductor films; Silicon;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220412
