Antenna and method for producing antennas

An antenna comprising:

• at least one magnetic core;
• at least one winding wound around said magnetic core;
• and
• an electrically insulating base on which said magnetic core provided with said at least one winding is arranged, said electrically insulating base integrating electrically conductive elements connected to said at least one winding, where said electrically insulating base comprises at least two physically separated parts which are arranged, facing one another and providing a bottom seat attached to said magnetic core,
• wherein:
• each of said two parts provides a support portion, said support portions together constituting a support around the outer perimeter of which there is wound an external winding;
• and
• each of said two parts has protuberances in two distal end portions, each of the protuberances including two walls which form a corner and constitute said support portions, whereby said two parts provide four corners, one gap existing between said distal end portions of each part, and another gap existing between both separated parts.