Abstract <p>The high-frequency wave propagation in homogeneous and inhomogeneous plasma at frequencies close to electron cyclotron resonance has been laboratory simulated. In the experiment, the electron cyclotron frequency is higher than the plasma frequency but lower than the radiation frequency, which corresponded to the conditions of the propagation of auroral kilometric radiation in the Earth’s magnetosphere recorded by high-orbit satellites at a large distance from the source region. The features of channeling of modes of magnetoplasma in an artificial magneto-oriented density duct with reduced density are studied. Experimental results show that plasma irregularities with transverse dimensions smaller than the wavelength in vacuum are effective channels for the transfer of fast waves along the magnetic field.</p>