The current stage of development a technology is associated with the use of different types of metamaterials – composite materials that do not exist in nature and characterized by negative values of permittivity and magnetic permeability, both separately (SNG – single negative) and simultaneously (DNG double negative). In the latter case, such an environment media new unusual properties, and its application allows you to control the laws of dispersion, refraction and reflection of electromagnetic waves in electrodynamic structures known.
The anisotropic properties of a metamaterial have a different impact on the characteristics and parameters of systems depending on orientation relative to the incident wave. As well known, the reverse effect of wave propagation in a waveguide structure, which occurs when a longitudinal magnetic permeability-positive, and transverse magnetic permeability- negative[3, 4]. Thus at the resonant frequency of the unit cell of the metamaterial waveguide supports propagation of backward waves below the cutoff frequency of fundamental mode H10. In this case, the lowest frequency wave propagation in the waveguide and, consequently, the possibility of reducing its overall dimensions are determined by the possibility of creating a uniaxial metamaterial with negative magnetic permeability in a given frequency range.
The paper presents the results of computer simulation of electromagnetic wave propagation in a standard rectangular waveguide R32 type with the cross-section 72,14х34,04 mm, one of the wide walls of which are made in the form of the mushroom-shaped metamaterial magnetic wall. Using software Ansoft HFSS ver.13 the dependences of the field distribution during simulation of the fundamental mode H10, the characteristics of the complex reflection coefficient S11 of the frequency and the directional diagram from the end of the waveguide in the near zone are obtained.