Antenna system
View Patent ↗An antenna system according to an embodiment of the present disclosure includes an antenna unit and a metal cavity corresponding to the antenna unit. The metal cavity is grounded and provided with an opening connected with the outside. By introducing the metal cavity, an embodiment of the present invention solves the problem of multi-band mutual coupling caused by a common ground current by using the cavity filter structure with a small size.
1. An antenna system, comprising:
a single planar substrate having a front surface and a back surface;
an antenna unit attached to the front surface of the single planar substrate; and
a metal cavity adjacent to the antenna unit, the metal cavity attached to the back surface of the single planar substrate, the metal cavity comprising a first metal wall, a second metal wall and a third metal wall,
wherein the first metal wall and the second metal wall are vertically connected with the single planner substrate, and the third metal wall is parallel to the front surface,
wherein the first metal wall, the second metal wall and the third metal wall are connected in pairs to form a cover-like structure, and the cover-like structure and the single planner substrate surround a cavity space, a distance between the third metal wall and the single planner substrate is 3 to 6 mm,
wherein the metal cavity is grounded and provided with an opening connected with the outside, and
the third metal wall and the antenna unit overlap across the single planar substrate, and
the area of the single planar substrate covered by the third metal wall is larger than or equal to the area covered by the antenna unit.
2. The antenna system according to claim 1 , wherein the antenna unit is arranged in a predetermined layout area of the single planar substrate, and the predetermined layout area is close to a side edge of the single planar substrate.
3. The antenna system according to claim 2 , wherein the predetermined layout area is close to two adjacent side edges of the single planar substrate.
4. The antenna system according to claim 3 , wherein the two adjacent side edges of the single planar substrate are perpendicular to each other.
5. The antenna system according to claim 1 , wherein the predetermined layout area is a rectangle and comprises a first edge and a second edge, the first edge and the second edge being adjacent and perpendicular to each other;
the first metal wall is vertically connected with the second metal wall;
a connection portion between the first metal wall and the single planar substrate corresponds to the first edge, a connection portion between the second metal wall and the single planar substrate corresponds to the second edge; and
the opening faces the outside of the single planar substrate.
6. The antenna system according to claim 5 , wherein the third metal wall is a rectangle, and the third metal wall is vertically connected with the first metal wall and the second metal wall, respectively.
7. The antenna system according to claim 6 , wherein the single planar substrate is provided with a ground plane, which covers an area of the back surface of the single planar substrate which is not surrounded by the metal cavity.
8. The antenna system according to claim 1 , wherein the number of the antenna units is 2, and the number of the metal cavities is 2.
9. The antenna system according to claim 8 , wherein the two antenna units are symmetrically arranged, and the two metal cavities are symmetrically arranged.
10. The antenna system according to claim 1 , wherein the antenna unit is an IFA antenna unit.
11. The antenna system according to claim 10 , wherein the frequency band corresponding to the antenna unit covers the sub-6G N1/N41 frequency bands.