Antenna structure and electronic device
An antenna structure includes a substrate, a ground layer, a radiation patch, a first feed structure, and a second feed structure. The radiation patch, the first feed structure, and the second feed structure are located on a first surface of the substrate, and the ground layer is located on a second surface of the substrate. The first surface and the second surface are two surfaces of the substrate facing away from each other. The radiation patch has a slotted structure. In a first direction, the first feed structure and the second feed structure are symmetrically located on both sides of the radiation patch.
1. An antenna structure, comprising: a substrate, a ground layer, a radiation patch, a first feed structure, and a second feed structure; wherein;
the radiation patch, the first feed structure, and the second feed structure are located on a first surface of the substrate, and the ground layer is located on a second surface of the substrate;
the first surface and the second surface are two surfaces of the substrate facing away from each other;
the radiation patch has a slotted structure;
in a first direction, the first feed structure and the second feed structure are symmetrically located on both sides of the radiation patch,
the slotted structure has a first slot, a second slot, and a third slot;
the first slot and the third slot are connected on both sides of the second slot symmetrically about a second centerline of the radiation patch in a second direction, and the second slot communicates with the first slot and the third slot;
the second slot comprises a first slit extending along the second direction and three second slits extending along the first direction; the three second slits are arranged sequentially along the second direction; the first slit is located on a first centerline of the radiation patch in the first direction and a middle second slit of the three second slits is located on the second centerline;
the radiation patch comprises a first notch at a first edge and a second notch at a second edge in a plane parallel to the substrate; and
the three second slits are located between the first notch and the second notch of the radiation patch in the first direction.
2. The antenna structure according to claim 1 , wherein
the radiation patch is configured to introduce two resonant frequency points and one radiation zero point between the two resonant frequency points, and
the first feed structure and the second feed structure are configured to introduce another two radiation zero points.
3. The antenna structure according to claim 1 , wherein
the slotted structure is substantially symmetrical about the first centerline of the radiation patch in the first direction and is substantially symmetrical about the second centerline of the radiation patch in the second direction; and
the second direction intersects the first direction.
4. The antenna structure according to claim 3 , wherein an orthographic projection of the slotted structure on the substrate is substantially H-shaped.
5. The antenna structure according to claim 1 , wherein a width of the first slot is less than a width of the second slot.
6. The antenna structure according to claim 1 , wherein orthographic projections of the first slot and the third slot on the substrate are straight line segments parallel to the second direction.
7. The antenna structure according to claim 1 , wherein
the first slot has a first portion and a second portion in communication;
orthographic projections of the first portion and the second portion on the substrate are both L-shaped, and the first portion and the second portion are substantially symmetrical about the first centerline.
8. The antenna structure according to claim 1 , wherein
the first slot has a third portion, a fourth portion, and a fifth portion in communication;
the third portion and the fifth portion are symmetrically connected on both sides of the fourth portion in the first direction; and
the fourth portion communicates with the second slot, and a width of the fourth portion gradually decreases along a direction away from a position of communication with the second slot until substantially the same as a width of the third portion.
9. The antenna structure according to claim 1 , wherein an orthographic projection of the second slot on the substrate is a straight line segment parallel to the first direction.
10. The antenna structure according to claim 1 , wherein any second slit is substantially symmetrical about the first centerline and the n-three second slits are substantially symmetrical about the second centerline.
11. The antenna structure according to claim 1 , wherein
the radiation patch has the first edge and the second edge in the first direction in a plane parallel to the substrate;
the first feed structure is adjacent to the first edge, and the second feed structure is adjacent to the second edge; and
a pitch between the first feed structure and the first edge of the radiation patch is less than or equal to a pitch between the second feed structure and the second edge of the radiation patch.
12. The antenna structure according to claim 11 , wherein
at least a portion of the first feed structure is located within the first notch, and at least a portion of the second feed structure is located within the second notch.
13. The antenna structure according to claim 12 , wherein
the first feed structure comprises: a feed main body, a first branch, and a second branch; and
the first branch and the second branch are electrically connected on both sides of the feed main body symmetrically about a centerline of the first feed structure in the second direction.
14. The antenna structure according to claim 13 , wherein
the feed main body comprises: a first feed main body and a second feed main body electrically connected in sequence;
the first branch and the second branch are electrically connected on both sides of the first feed main body symmetrically about the centerline of the first feed structure in the second direction; and
a width of the first feed main body is greater than a width of the second feed main body, and at least a portion of the second feed main body is located within the first notch of the radiation patch.
15. The antenna structure according to claim 14 , wherein
the first branch comprises: a first feed branch and a first open-circuit branch, wherein the first feed branch is electrically connected with the first feed main body and the first open-circuit branch, and the first open-circuit branch is located on one side of the first feed branch away from the first feed main body; and
the second branch comprises: a second feed branch and a second open-circuit branch, the second feed branch is electrically connected with the first feed main body and the second open-circuit branch, and the second open-circuit branch is located on one side of the second feed branch away from the first feed main body.
16. The antenna structure according to claim 15 , wherein the first open-circuit branch and the second open-circuit branch are straight line segments parallel to the first direction.
17. The antenna structure according to claim 1 , wherein orthographic projections of the radiation patch, the first feed structure, and the second feed structure on the substrate are not overlapped.
18. An electronic device, comprising the antenna structure according to claim 1 .