Dual-band antenna and antenna system
The present invention discloses a dual-band antenna. The dual-band antenna includes a first radiating element and a second radiating element. The first radiating element is parallel to a first plane, operates at a first frequency band, and has a first edge and a second edge. The first edge and the second edge are connected through a central portion. The second radiating element is parallel to a second plane, adjacent to the first edge, the second edge and a first side of the central portion, and operates at a second frequency band, where the first plane is perpendicular to the second plane.
1. A dual-band antenna, comprising:
a first radiating element parallel to a first plane, operating at a first frequency band, wherein the first radiating element comprises a first radiating part having a first edge and a second radiating part having a second edge, and-the first radiating part and the second radiating part are connected through a central portion to form a symmetric structure, wherein the central portion comprises a planar surface parallel to the first plane;
a second radiating element parallel to a second plane, operating at a second frequency band, adjacent to the first edge, the second edge and a first side of the central portion; and
a grounding element, parallel to the first plane; and
a shorting element, connected between the grounding element and a second side of the central portion, wherein the second side is opposite to the first side;
wherein the first plane is perpendicular to the second plane.
2. The dual-band antenna of claim 1 , wherein the shorting element is parallel to the second plane.
3. The dual-band antenna of claim 1 , further comprising:
a matching element, parallel to the first plane; and
a connecting element, connected between the matching element and the first side of the central portion.
4. The dual-band antenna of claim 3 , wherein the connecting element is parallel to the second plane.
5. The dual-band antenna of claim 1 , wherein the second radiating element is substantially in a T-shape.
6. The dual-band antenna of claim 1 , wherein the first radiating element is substantially in a shape of a double-diamond.
7. An antenna system, comprising:
at least a dual-band antenna, each comprising:
a first radiating element parallel to a first plane, operating at a first frequency band, wherein the first radiating element comprises a first radiating part having a first edge and a second radiating part having a second edge, and the first radiating part and the second radiating part are connected through a central portion to form a symmetric structure, wherein the central portion comprises a planar surface parallel to the first plane;
a second radiating element parallel to a second plane, operating at a second frequency band, adjacent to the first edge, the second edge and a first side of the central portion; and
a grounding element, parallel to the first plane; and
a shorting element, connected between the grounding element and a second side of the central portion, wherein the second side is opposite to the first side;
wherein the first plane is perpendicular to the second plane; and
a radio frequency (RF) processing module, coupled to the at least a dual-band antenna.
8. The antenna system of claim 7 , wherein the shorting element is parallel to the second plane.
9. The antenna system of claim 7 , further comprising:
a matching element, parallel to the first plane; and
a connecting element, connected between the matching element and the first side of the central portion.
10. The antenna system of claim 9 , wherein the connecting element is parallel to the second plane.
11. The antenna system of claim 7 , wherein the second radiating element is substantially in a T-shape.
12. The antenna system of claim 7 , wherein the first radiating element is substantially in a shape of a double-diamond.