Dielectric-free metal-only dipole-coupled radiating array aperture with wide field of view

A radiator structure, comprising:

• a ground surface having a plurality of openings disposed therethrough;
• first and second antenna loops with each loop disposed in a respective plane perpendicular to the ground surface, each loop having a first end shorted to the ground surface and each loop having a second end disposed in a respective one of the plurality of openings, wherein the antenna loops comprise self-supporting metal-only structures such that the antenna loops are not embedded in dielectric materials;
• a third antenna loop disposed in the same plane as the first antenna loop, the third loop having a first end shorted to the ground surface and a second end disposed in a respective one of the plurality of openings;
• and
• a fourth antenna loop disposed in the same plane as the second antenna loop, the fourth loop having a first end shorted to the ground surface and a second end disposed in a respective one of the plurality of openings,
• wherein the first, second, third, and fourth antenna loops are arranged in a plus-shaped pattern and the grounded ends of the first, second, third, and fourth antenna loops are disposed proximate the center of the plus-shape.