Patent ID: 11012047

Abstract:
The invention relates to the antenna technology used generally for providing a communication in the mines, in particular to the small resonant re-tunable antennas intended for providing an induction communication too. The technical effect is a possibility to adjust smoothly an operation frequency of the antenna within the wide radio wave range and, as a consequence, a possibility to compensate an effect of the outer objects having a capacity and switch the antenna to the other transceiving frequency channels.Re-tunable resonant antenna with matching device, the said antenna comprising a matching device in the form of a transformer consisting of a primary and secondary windings; a transmitting vibrator in the form of 2D- or 3D-conducting body, the said vibrator being connected to the secondary winding of the transformer and located in the magnetic field of the matching transformer, is characterized in that, proximal to the coils of the secondary solenoid of the transformer, there is a capacity component coupled galvanically to the matching transformer in any point and is moved along the axis of the solenoid.Due to that the primary and secondary solenoids of the antenna transformer are made of sections which are connected in series via a relay, it is possible to retune a frequency not only within a single range, but to switch to the other range.