Tunable electromagnetic bandgap performance of coplanar waveguides periodically loaded by ferroelectric varactors
Journal article, 2003
To achieve tunable electromagnetic bandgap (EBG) performance, ferroelectric varactors are considered, in LC circuits, for periodically loading coplanar waveguides (CPWs). Asymmetric or symmetric tuning of the bandgap width may be achieved by changing the capacitance of the varactors in the LC circuits. To validate this concept, tunable EBG arrays based on silicon substrate CPWs, including thin film SrTiO3 (STO) varactors, are fabricated and tested experimentally. The EBGs are designed so that the first band gap starts between 20 and 30 GHz. Up to 10% tuning is achieved, under 20-V DC applied bias, in the EBG structures.
Substrates
Waveguides
Varactors
Ferroelectric materials
Semiconducting silicon
Tuning
Energy gap
Electric fields
Permittivity
Thin films
Capacitance
Author
Dan Kuylenstierna
Department of Microelectronics and Nanoscience
G. Subramanyam
University of Dayton
Andrei Vorobiev
Department of Microelectronics and Nanoscience
Spartak Gevorgian
Department of Microelectronics and Nanoscience
Microwave and Optical Technology Letters
0895-2477 (ISSN) 1098-2760 (eISSN)
Vol. 39 2 81-86Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1002/mop.11134