AN ADJUSTABLE DIRECTIONAL СОUРLЕR FOR THE TERAHERTZ RANGE
The problem of the electromagnetic wave propagation through a system consisting of three high-periodic grids is considered. For a plane linearly polarized electromagnetic wave expressions for the reflection and transmission coefficients of such a system at arbitrary distances between the grids and the orientation angles of their conductors by using Vladimirski’s boundary conditions are found. The proposed method allows to calculate the reflection and transmission system consisting of an arbitrary number of grids. The experimental results are in good agreement with the calculated values. The design of a reflection-type controlled directional coupler based on a "hollow dielectric channel" type waveguides is proposed.