Circularly polorized square patch antenna

A circularly polarized antenna comprising:

• a first antenna element comprising:
• a first square patch element having first and second feed points and lying in a first plane, the first feed point being disposed near a first edge of the square patch element and substantially bisecting the first edge, and the second feed point being disposed near a second edge of the square patch element and substantially bisecting the second edge;
• a first feed structure lying in a second plane below the first plane and having a first segment coupled between a signal point and the first feed point, and a second segment coupled between the signal point and the second feed point, the first and second segments of the first feed structure having unequal lengths;
• and
• a second antenna element comprising:
• a second square patch element having first and second feed points and lying in the first plane, the first feed point being disposed near a first edge of the square patch element and substantially bisecting the first edge, and the second feed point being disposed near a second edge of the square patch element and substantially bisecting the second edge;
• a second feed structure lying in the second plane below the first plane and having a first segment coupled between a signal point and the first feed point, and a second segment coupled between the signal point and the second feed point, the feed structure having three 90 degree bends and the first and second segments of the feed structure having unequal lengths;
• and
• a ground plane supporting the first and second antenna elements.

An antenna assembly comprising:

• a first square patch element having first and second perpendicular feed points and lying in a first plane, the first feed point being disposed near a first edge of the square patch element and substantially bisecting the first edge, and the second feed point being disposed near a second edge of the square patch element and substantially bisecting the second edge;
• a first feed structure lying in a second plane below the first plane and having a first segment coupled between a signal point and the first feed point, and a second segment coupled between the signal point and the second feed point, the first segment having one 90 degree bend and the second segment having two 90 degree bends;
• a ground plane onto which the feed structure and the square patch element are securely fastened;
• and
• a radome covering and sealing over the ground plane and enclosing the first square patch element and feed structure.

An antenna comprising:

• a ground plane
• a square patch element supported by a rigid center support securely fastened to the ground plane and disposed in a first horizontal plane;
• a feed structure coupled to a first and second feed points on the square patch element and disposed in a second horizontal plane below the first plane and having four substantially straight sections coupled sequentially with ninety degree bends, the first section coupled to the first feed point being substantially perpendicular to a first side of the square patch element and the fourth section coupled to the second feed point being substantially perpendicular to an adjacent side of the square patch element, a second section of the feed structure being coupled to a signal feed point;
• and
• a radome covering and enclosing the square patch and feed structure over the ground plane.