Two-tier wide band antenna

An antenna device comprising a substrate formed from an electrically insulating material;

• an antenna mounted on said substrate, said antenna comprising a first radiating structure located substantially in a first plane and having a feed point located substantially at a first end of said radiating structure;
• a second radiating structure located substantially in a second plane, said first plane being spaced apart from and substantially parallel with said second plane;
• and a block of dielectric material located substantially between said first and second radiating structures to provide a spacing between said first and second planes, wherein said second radiating structure comprises at least two spaced-apart, elongate radiating elements, each of said at least two radiating elements having a respective first end that is electrically connected to said first radiating structure substantially at a second end of said first radiating structure, said respective first end of said at least two radiating elements being substantially in register with said second end of said first radiating structure.