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Ferroelectric Thin-Film Based Two-Dimensional Electromagnetic Structures, U. Khan, Guru Subramanyam, S. Gevorgian, A. Vorobiev
Ferroelectric Thin-Film Based Two-Dimensional Electromagnetic Structures, U. Khan, Guru Subramanyam, S. Gevorgian, A. Vorobiev
Guru Subramanyam
A two-dimensional electromagnetic bandgap structure has been developed using ferroelectric thin-films. Using lumped inductors and parallel plate capacitors a planar structure is developed which creates a bandgap in the 20–40 GHz range, as demonstrated by experimental results. The ferroelectric material Ba0.6Sr0.4TiO3 (BST) is used in the form of a thin-film between patterned layers of gold to form capacitors on a 500 μm thick high-resistivity Si substrate. A meander line based design is used to form the two-dimensional surface which provides biasing pathways to the varactors. The concept is simulated and experimentally verified using a coplanar waveguide based device in which …