Temperature Stabilization of Electromagnetic Wave Phase Velocity in Rectangular Waveguide with Layered Nanocomposite Ferroelectric Film

A solution is obtained for propagation constant of electromagnetic wave fundamental mode in straight-angle waveguide with the cross section partially filled with multilayer nanocomposite ferroelectric film (MNESEP) on a dielectric substrate. The numerical model is based on the scalar form of the finite element method reduced to a homogeneous system of linear algebraic equations with respect to nodal values of the wave scalar for one-dimensional approximation. The nanolayer dielectric properties are determined by barium concentration dependence in composition of BaxSr1–xTiO3 solid solution. A calculation program for several dozens of elements of partition along the wide wall of a rectangular wave-guide is developed. The results of computer modeling for MNSEP with different number of layers and concentration dependences of barium are given, which allow to stabilize the propagation constant over a wide temperature range.

Authors: I.G.Mironenko, A.A.Ivanov

Direction: Проектирование и технология радиоэлектронных средств

Keywords: Multilayer Nanocomposite Ferroelectric Film, Ferroelectric Structures at Ultra-High Frequencies, Technology of Films Formation of Barium–Strontium Titanate

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