A conductive plane antenna (100, 300, 308, 314, 402, 900), comprising: a non-conductive substrate; a conductive plane (104, 310, 316) coupled to the non-conductive substrate; wherein the conductive plane includes an open cavity (106, 304, 312, 318, 908) over the non-conductive substrate; wherein the cavity includes a closed end and an open end, and a first edge and a second edge therebetween, the first edge arranged opposite the second edge; a first feed point coupled to the conductive plane along the first edge and configured to pass a first polarity of a set of electromagnetic signals to generate a first current distribution on the first edge of a first polarity; and a second feed point coupled to the conductive plane along the second edge and configured to pass a second polarity of the set of electromagnetic signals to generate a second current distribution on the second edge of a second polarity opposite to the first polarity; wherein the conductive plane is configured to generate a first antenna gain pattern (600, 700, 800, 914, 916) in response to the first and second polarity signals; wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals; and wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern, wherein the cavity is positioned within the conductive plane such that the first current distribution on the first edge of the cavity substantially cancels out the second current distribution on the second edge of the cavity, and wherein the closed end of the open cavity (106, 304, 312, 318, 908) is located proximate to a geometrical center of the conductive plane (104, 310, 316). a non-conductive substrate; a conductive plane (104, 310, 316) coupled to the non-conductive substrate; wherein the conductive plane includes an open cavity (106, 304, 312, 318, 908) over the non-conductive substrate; wherein the cavity includes a closed end and an open end, and a first edge and a second edge therebetween, the first edge arranged opposite the second edge; a first feed point coupled to the conductive plane along the first edge and configured to pass a first polarity of a set of electromagnetic signals to generate a first current distribution on the first edge of a first polarity; and a second feed point coupled to the conductive plane along the second edge and configured to pass a second polarity of the set of electromagnetic signals to generate a second current distribution on the second edge of a second polarity opposite to the first polarity; wherein the conductive plane is configured to generate a first antenna gain pattern (600, 700, 800, 914, 916) in response to the first and second polarity signals; wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals; and wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern, wherein the cavity is positioned within the conductive plane such that the first current distribution on the first edge of the cavity substantially cancels out the second current distribution on the second edge of the cavity, and wherein the closed end of the open cavity (106, 304, 312, 318, 908) is located proximate to a geometrical center of the conductive plane (104, 310, 316).