HTS/ferroelectric devices for microwave applications
Artikel i vetenskaplig tidskrift, 1997

High Temperature Superconducting (HTS, e.g. YBCO) microwave devices based on bulk or thin film ferroelectrics (e.g. Strontium Titanate-STO) are studied theoretically and experimentally. YBCO/STO/YBCO parallel-plate resonators and based on bulk single crystal STO are for electrically tunable high power filters, phase shifters and other devices in the frequency band 0.5-2.0 GHz of advanced microwave communication systems. Thin film YBCO/STO Inter-digital Capacitors (IDC), Coplanar Waveguides (CPW) phase shifters/delay lines are also designed and studied experimentally for low microwave power applications. Modelling problems of these devices and microwave losses in ferroelectrics are also discussed

Coplanar waveguides Ferroelectric devices Ferroelectric materials High temperature superconductors Microwave devices Phase shifters Superconducting filters Superconducting microwave devices Superconducting thin films Yttrium barium copper oxide


Spartak Gevorgian

Institutionen för mikroelektronik och nanovetenskap

Erik F. Carlsson

Institutionen för mikrovågsteknik

Ulf Helmersson

IEEE Transactions on Applied Superconductivity

1051-8223 (ISSN)

Vol. 7 2458 - 2461



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