Excitation of upper hybrid cones in magnetoactive plasma

Results are presented from laboratory studies of the radiation transport from a transmitting to a receiving antenna in a cold magnetoactive plasma in the upper hybrid frequency range. In the low-frequency part of this range, sharp maxima of the transmission coefficient are recorded in the resonant directions. In the high-frequency part, a beamed radiation along the external magnetic field is observed. An analysis of the experiments shows that the Q factor of the angular resonances is primarily limited by the phase effects caused by weak spatial dispersion.