Microwave impedance control over a ferroelectric boundary layer

Microwave far-field radiation was simulated using a coax cable inside which a ferroelectric layer with a ground plane was loaded. The ferroelectric layer was electrically biased via a planar permeable electrode allowing an RF electromagnetic field to penetrate, thereby causing reflection. By interpolating the normal-mode frequencies of the cavity resonator formed by the coax cable, it was determined the coupling between the loaded ferroelectric sample and the resonator is second order. An effective electric-bias configuration for a ferroelectric layer is thus proposed.