Vehicle antenna with shorted conductive structure around its radiator

A vehicle antenna comprising:

• a plurality of radiators;
• each radiator configured to extend from a respective ground plane;
• each radiator comprising:
• a feed point;
• a conductive structure having a first radial thickness and being around a portion of the radiator, the portion being distal from the respective ground plane;
• an electrical gap between the conductive structure and the portion of the radiator, the electrical gap having a second radial thickness being the same or greater than the first radial thickness;
• and
• a shorting arrangement configured to electrically connect the conductive structure to the respective ground plane,
• wherein the radiator is an inverted cone radiator comprising a hollow conical shape having a surface of revolution and being open at a base of the inverted cone radiator.