| CPC H01Q 9/065 (2013.01) [H01Q 5/15 (2015.01); H01Q 9/0435 (2013.01); H01Q 21/0075 (2013.01)] | 7 Claims |
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1. An antenna array, comprising:
a common carrier including a first plate surface and a second plate surface opposite to each other, wherein the common carrier has a first direction and a second direction that is perpendicular to the first direction;
four microstrip antennas spaced apart from each other and disposed on the common carrier, wherein the four microstrip antennas are arranged in a matrix along the first direction and the second direction, and each of the four microstrip antennas includes:
an antenna structure including:
a circular body disposed on the first plate surface; and
two circular feeding points disposed on the first plate surface and surrounded by the circular body, wherein the two circular feeding points do not connect to the circular body;
a power divider disposed on the second plate surface and electrically coupled to the antenna structure, wherein the power divider is configured to feed signals to the two circular feeding points, so as to generate a phase difference of 90 degrees between the two circular feeding points;
wherein any two adjacent ones of the antenna structures along the second direction have a two-fold rotational symmetry relationship, and any two adjacent ones of the power dividers along the first direction or the second direction have a mirror-symmetrical relationship;
wherein, in each of the four microstrip antennas, the circular body has a first center and a radius, each of the two circular feeding points has a second center, and a shortest distance between the second center and the first center is less than ½ of the radius.
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