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

Dan Kuylenstierna (Institutionen för mikroelektronik och nanovetenskap) ; G. Subramanyam ; Andrei Vorobiev (Institutionen för mikroelektronik och nanovetenskap) ; Spartak Gevorgian (Institutionen för mikroelektronik och nanovetenskap)
Microwave and Optical Technology Letters (0895-2477). Vol. 39 (2003), 2, p. 81-86.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Varactors, Energy gap, Ferroelectric materials, Capacitance, Substrates, Semiconducting silicon, Thin films, Tuning, Permittivity, Electric fields, Waveguides



Denna post skapades 2006-08-29. Senast ändrad 2014-09-02.
CPL Pubid: 11839

 

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Institutioner (Chalmers)

Institutionen för mikroelektronik och nanovetenskap (1900-2003)

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur