Antenna, and circuit board having an antenna

A circuit board, comprising:

• a board edge;
• a ground plane;
• a recess defined within the ground plane, wherein the recess defines an interior periphery and an opening to the board edge;
• a feed line that extends into the recess;
• and
• an antenna coupled to the circuit board, the antenna comprising:
• a sheet of metallic material;
• a notch defined in an interior portion of the sheet of metallic material, wherein the notch is triangular and is at least partially located over the recess, the notch is defined by a base that includes an inner edge of the sheet of metallic material, a first leg that intersects the base and includes a first edge of the sheet of metallic material, and a second leg that intersects the base and includes a second edge of the sheet of metallic material, the first leg and the second leg extend from the base and toward each other to define an open apex region on an outer edge of the sheet of metallic material opposite the inner edge, and the open apex region opens toward the board edge;
• a first exterior standoff that extends from the first edge;
• a second exterior standoff that extends from the second edge;
• a first feed spacer that extends into the notch;
• and
• a first crossover spacer that extends into the open apex region.