Title

Tunable electromagnetic bandgap performance of coplanar waveguides periodically loaded by ferroelectric varactors

Document Type

Article

Publication Date

10-2003

Publication Source

Microwave and Optical Technology Letters

Abstract

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.

Inclusive pages

81–86

ISBN/ISSN

1098-2760

Publisher

Wiley Online Library

Volume

39

Issue

2

Peer Reviewed

yes

Keywords

electromagnetic bandgap (EBG); coplanar waveguide (CPW); ferroelectric varactor; tunability