A magnetic antenna device comprising at least one magnetic antenna unit (100, 200C); wherein the at least one magnetic antenna unit comprises: a secondary module having a secondary inductance configured as a radiating antenna element of said at least one magnetic antenna unit, the secondary module comprising at least one pair of radiating sets, wherein each radiating set includes a serially connected winding coil and respective controllable resonating capacitor, whereby each radiating set is connected to ground from both ends thereof, wherein said secondary module is symmetric, each of said at least one pair of radiating sets comprising co-axial first and second winding coils wrapped in an opposite direction and connected in parallel to each other, each of the coaxial first and second winding coils is configured to generate a magnetic field in the same direction with respect to each other; each of said at least one pair of radiating sets comprising controllable first and second resonating capacitors respectively; whereby the first and the second winding coils of each of at least one pair of radiating sets are connected to ground via the controllable first and second resonating capacitors respectively; a primary module having a primary inductance configured as a feeding circuit for said secondary module wherein said primary module is inductively coupled to said secondary module for feeding said secondary module, the primary module comprising one or more pairs of feeding sets, each feeding set includes a respective winding coil being connected at one end to a feeding port of the magnetic antenna device, and at the other end, to the ground, such said primary module is configured to generate a magnetic field in a direction co-aligned with said winding coil; wherein said primary module is symmetric, each of said one or more pairs of feeding sets comprising co-aligned winding (L1 and L2) coils wrapped in an opposite direction and connected in parallel to each other such that each winding coil of the one or more pairs of feeding sets is configured to generate a magnetic field in the same direction with respect to the other winding coil of the one or more pair of feeding sets; wherein a ratio between the primary and the secondary inductances of said feeding sets and of said radiating sets corresponds to a ratio between impedances of the radiating sets and of said feeding sets; wherein the winding coils of said primary and secondary modules are arranged such that said magnetic antenna device has an impedance matched to an impedance of a transmission line to be connected to said feeding port. a secondary module having a secondary inductance configured as a radiating antenna element of said at least one magnetic antenna unit, the secondary module comprising at least one pair of radiating sets, wherein each radiating set includes a serially connected winding coil and respective controllable resonating capacitor, whereby each radiating set is connected to ground from both ends thereof, wherein said secondary module is symmetric, each of said at least one pair of radiating sets comprising co-axial first and second winding coils wrapped in an opposite direction and connected in parallel to each other, each of the coaxial first and second winding coils is configured to generate a magnetic field in the same direction with respect to each other; each of said at least one pair of radiating sets comprising controllable first and second resonating capacitors respectively; whereby the first and the second winding coils of each of at least one pair of radiating sets are connected to ground via the controllable first and second resonating capacitors respectively; a primary module having a primary inductance configured as a feeding circuit for said secondary module wherein said primary module is inductively coupled to said secondary module for feeding said secondary module, the primary module comprising one or more pairs of feeding sets, each feeding set includes a respective winding coil being connected at one end to a feeding port of the magnetic antenna device, and at the other end, to the ground, such said primary module is configured to generate a magnetic field in a direction co-aligned with said winding coil; wherein said primary module is symmetric, each of said one or more pairs of feeding sets comprising co-aligned winding (L1 and L2) coils wrapped in an opposite direction and connected in parallel to each other such that each winding coil of the one or more pairs of feeding sets is configured to generate a magnetic field in the same direction with respect to the other winding coil of the one or more pair of feeding sets; wherein a ratio between the primary and the secondary inductances of said feeding sets and of said radiating sets corresponds to a ratio between impedances of the radiating sets and of said feeding sets; wherein the winding coils of said primary and secondary modules are arranged such that said magnetic antenna device has an impedance matched to an impedance of a transmission line to be connected to said feeding port.