Antenna device for HF and LF operation

An antenna device, comprising:

• at least one magnetic core;
• at least one winding wound around said at least one magnetic core providing a LF antenna adapted to work at a frequency comprised in a range between 20 to 150 kHz;
• and
• an electrically insulated base, on which said at least one magnetic core wound with said at least one winding is arranged, said electrically insulated base including metallic tabs at least part of which are electrically connected to said at least one winding and the electrically insulated base having a bottom surface with electrically conductive plates providing a layout for a SMT mounting, wherein at least one of said metallic tabs is connected to at least one of said electrically conductive plates,
• wherein the antenna device further comprises
• an electrically insulated cap, arranged over and covering said at least one magnetic core, the insulated cap having an upper surface and a side surface, and
• at least one metallized surface high frequency coil with two ends being arranged on said upper surface of the insulated cap, said metallized surface high frequency coil working as an antenna and being electrically connected by an extended portion of each of said ends, arranged on said side surface of the electrically insulated cap to at least one of said metallic tabs of the electrically insulated base,
• wherein the electrically insulated cap is replaceable and it is mechanically fixed over the magnetic core and over the at least one winding, thereby allowing different performances of the high frequency coil as an inductive HF antenna adapted to work at a frequency comprised in a range between 3 and 30 MHz, independently of the arrangement of said LF antenna.