Wide-band dipole antenna

A millimeter-wave antenna system comprising:

• a ground plane;
• and
• a folded dipole radiator comprising:
• a plurality of feeds each extending away from the ground plane from a proximal end to a distal feed end;
• a plurality of radiating arms each coupled to and extending away from the distal feed end of a respective one of the plurality of feeds;
• and
• a plurality of folded conductors each coupled to a respective one of the plurality of radiating arms and each having a distal conductor end, wherein a distance between each distal conductor end and the ground plane is less than a distance between the distal feed end of the respective one of the plurality of feeds and the ground plane;
• wherein each of the plurality of feeds and each of the plurality of radiating arms comprises an electrical conductor.

An antenna comprising:

• a symmetric radiating structure comprising a first half and a second half each electrically conductive and that are electrically separated from each other, each of the first half and the second half being configured similarly, the first half comprising:
• first feed means for connecting to a signal source and for conducting energy from a feed connection to a radiation connection, the first feed means extending in a first direction from the feed connection;
• radiating means, coupled to the first feed means, for radiating the energy, the radiating means extending from the radiation connection in a second direction away from the second half;
• and
• first coupling means, coupled to the radiating means, for coupling energy to second coupling means of the second half,
• wherein a first distal portion of the first coupling means and a second distal portion of second coupling means of the second half extend parallel to each other and are separated by less than 400 micro-meters.

An antenna comprising

• a symmetric radiating structure comprising a first half and a second half each electrically conductive and that are electrically separated from each other, each of the first half and the second half being configured similarly, the first half comprising:
• first feed means for connecting to a signal source and for conducting energy from a feed connection to a radiation connection, the first feed means extending in a first direction from the feed connection;
• radiating means, coupled to the first feed means, for radiating the energy, the radiating means extending from the radiation connection in a second direction away from the second half;
• and
• first coupling means, coupled to the radiating means, for coupling energy to second coupling means of the second half,
• wherein a portion of the first coupling means is disposed between the first feed means and second feed means of the second half.