| CPC H01Q 21/245 (2013.01) [H01Q 1/36 (2013.01)] | 8 Claims |
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1. A dual circularly polarized antenna structure, comprising:
a substrate having a first extension direction and a second extension direction that is perpendicular to the first extension direction;
an M number of antenna arrays disposed on the substrate, wherein M is a positive integer greater than or equal to 1, and each of the M antenna arrays includes:
two first antennas, wherein each of the two first antennas includes:
two first sub-antennas arranged along the first extension direction, wherein each of the two first sub-antennas includes a first body, and a first receiving contact point and a first transmission contact point that are disposed on the first body; wherein one of the two first sub-antennas is configured to overlap another one of the two first sub-antennas when moving along the first extension direction; and
two first microstrip lines, wherein one of the two first microstrip lines is electrically coupled to the first receiving contact points of the two first sub-antennas, and has a first receiving feed point; wherein another one of the two first microstrip lines is electrically coupled to the first transmission contact points of the two first sub-antennas, and has a first transmission feed point; and
two second antennas, wherein each of the two second antennas includes:
two second sub-antennas arranged along the second extension direction, wherein each of the two second sub-antennas includes a second body, and a second receiving contact point and a second transmission contact point that are disposed on the second body; wherein one of the two second sub-antennas is configured to overlap another one of the two second sub-antennas when moving along the second extension direction; and
two second microstrip lines, wherein one of the two second microstrip lines is electrically coupled to the second receiving contact points of the two second sub-antennas, and has a second receiving feed point; wherein another one of the two second microstrip lines is electrically coupled to the second transmission contact points of the two second sub-antennas, and has a second transmission feed point;
wherein a center point is defined between the two first antennas and the two second antennas; wherein one of the first sub-antennas of each of the two first antennas and one of the second sub-antennas of each of the two second antennas are adjacent to the center point, and have a 4-fold rotational symmetry relative to the center point; and
a feed module, wherein the feed module is electrically coupled to each of the M antenna arrays for generating a first circular polarization and a second circular polarization; wherein a direction of rotation of the first circular polarization is opposite to a direction of rotation of the second circular polarization.
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