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CN-122026107-A - Antenna and intelligent device

CN122026107ACN 122026107 ACN122026107 ACN 122026107ACN-122026107-A

Abstract

The application discloses an antenna and intelligent equipment, which comprise a first radiation sheet, a second radiation sheet, a first metal layer and a first feed network layer. The second radiation piece is provided with a first through hole and a second through hole. The first metal layer is provided with a first feed hole and a second feed hole. The first feed network layer includes a first transmission line and a second transmission line. The antenna comprises a first feed probe and a second feed probe, one end of the first feed probe is connected with the first transmission line, and the other end of the first feed probe extends out of the first feed hole and the first through hole and is connected with the first radiation piece. One end of the second feed probe is connected with the second transmission line, and the other end extends out of the second feed hole and the second through hole and is connected with the first radiation piece. When the electrical lengths of the first transmission line and the second transmission line satisfy the corresponding relation, the first feed network layer forms a one-to-two power division network with a phase difference of 90 degrees. The antenna structure can realize circular polarization design on two different frequency bands of the antenna, and improves the anti-interference capability and the antenna bandwidth of the antenna.

Inventors

  • Yao Mianmu
  • GU YUAN
  • HU WANGBIN

Assignees

  • 深圳市信维通信股份有限公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (10)

  1. 1. An antenna is characterized by comprising a first radiation sheet, a second radiation sheet, a first metal layer and a first feed network layer which are sequentially stacked along a first direction; The second radiation sheet is provided with a first through hole and a second through hole, the first metal layer is provided with a first feed hole and a second feed hole, the orthographic projection of the first through hole and the orthographic projection of the first feed hole are at least partially overlapped along the first direction, and the orthographic projection of the second through hole and the orthographic projection of the second feed hole are at least partially overlapped; the first feed network layer is provided with a first mounting hole, comprises a first transmission line and a second transmission line, both the first transmission line and the second transmission line are arranged in the first mounting hole, and are connected with each other, wherein the electrical length of the first transmission line is L 1 , and the electrical length of the second transmission line is L 2 and 0.2 ≤(L 2 -L 1 )≤0.3 Wherein Is an effective wavelength; The antenna further comprises a first feed probe and a second feed probe, one end of the first feed probe is connected with the first transmission line, the other end of the first feed probe extends out of the first feed hole and the first through hole and is connected with the first radiation piece, one end of the second feed probe is connected with the second transmission line, and the other end of the second feed probe extends out of the second feed hole and the second through hole and is connected with the first radiation piece.
  2. 2. The antenna of claim 1, wherein the antenna comprises a substrate comprising an accommodating space, the substrate comprising a first surface and a second surface disposed opposite to each other, the accommodating space being formed between the first surface and the second surface, the first radiating patch being disposed on the first surface, the first feed network layer being disposed on the second surface.
  3. 3. The antenna of claim 1, wherein the first transmission line and the second transmission line each include a connection portion through which the first transmission line and the second transmission line are connected; The first transmission line comprises a first part and a second part, the first part is connected between the connecting part and the second part, the line width of the first part is smaller than that of the second part, the second transmission line comprises a third part and a fourth part, the third part is connected between the connecting part and the fourth part, and the line width of the third part is smaller than that of the fourth part.
  4. 4. The antenna of claim 1, wherein the antenna comprises an isolation resistor connected between the first transmission line and the second transmission line.
  5. 5. The antenna of claim 3, wherein the fourth portion comprises a first branch, a second branch, a third branch and a fourth branch which are sequentially connected, the first branch is connected with the third portion, the first branch is bent and arranged in a direction away from the connecting portion, the second branch is bent and arranged in a direction away from the first transmission line, the third branch is bent and arranged in a direction away from the connecting portion, and the fourth branch is bent and arranged in a direction close to the first transmission line.
  6. 6. The antenna of claim 1, wherein the antenna comprises a plurality of metal probes, wherein the first metal layer is provided with a plurality of first metal vias, the first feed network layer is provided with a plurality of second metal vias, and the plurality of metal probes penetrate through the first metal vias and the second metal vias and connect the first metal layer and the first feed network layer.
  7. 7. The antenna of claim 6, wherein a portion of the second metal vias are distributed around the first mounting hole.
  8. 8. The antenna of claim 1, wherein the antenna comprises a third radiating patch, a fourth radiating patch, a second metal layer, and a second feed network layer that are stacked in sequence, the second metal layer being connected to the first metal layer, the second feed network layer being connected to the first feed network layer.
  9. 9. The antenna of claim 2, wherein the substrate comprises polytetrafluoroethylene.
  10. 10. A smart device comprising an antenna as claimed in any one of claims 1 to 9.

Description

Antenna and intelligent device Technical Field The present application relates to the field of antenna technologies, and in particular, to an antenna and an intelligent device. Background With the continuous progress of technology and the expansion of application range, UWB is expected to realize innovative application in more fields, and brings more convenience and revolution for the living and industrial development of people. The method has great market application value in the future. The traditional UWB antenna design is mostly in a single-feed point design form, and in the single-feed point dual-band antenna design, the antenna is mostly in a linear polarization form, and circular polarization design is difficult to realize, so that the antenna is easy to be interfered by surrounding environment, radiation efficiency is reduced, and antenna performance is reduced. Disclosure of Invention The application aims to provide an antenna and intelligent equipment, and aims to improve the anti-interference capability and the antenna performance of the antenna. In a first aspect, the present application proposes an antenna comprising a first radiating patch, a second radiating patch, a first metal layer, and a first feed network layer, which are sequentially stacked along a first direction. The second radiation piece is provided with a first through hole and a second through hole. The first metal layer is provided with a first feed hole and a second feed hole. Along the first direction, the orthographic projection of the first through hole at least partially overlaps with the orthographic projection of the first feed hole, and the orthographic projection of the second through hole at least partially overlaps with the orthographic projection of the second feed hole. The first feed network layer is provided with a first mounting hole. The first feed network layer comprises a first transmission line and a second transmission line, the first transmission line and the second transmission line are arranged in the first mounting hole, and the first transmission line is connected with the second transmission line. Wherein the first transmission line has an electrical length of L 1, and the second transmission line has an electrical length of L 2, 0.2≤(L2-L1)≤0.3. Wherein the method comprises the steps ofIs an effective wavelength. The antenna also comprises a first feed probe and a second feed probe, one end of the first feed probe is connected with the first transmission line, and the other end of the first feed probe extends out of the first feed hole and the first through hole and is connected with the first radiation piece. One end of the second feed probe is connected with the second transmission line, and the other end extends out of the second feed hole and the second through hole and is connected with the first radiation piece. In the above scheme, the first feed probe and the second feed probe form direct feed and coupling feed forms with the first radiation piece and the second radiation piece respectively, and the first feed probe and the second feed probe are connected with the first transmission line and the second transmission line respectively. The electrical length of the first transmission line and the second transmission line is 0.2≤(L2-L1)≤0.3In this case, the first feed network layer can form an effective one-to-two power division network more easily, so that the antenna structure realizes circular polarization design on two different frequency bands of the antenna, and the anti-interference capability and the working antenna bandwidth of the antenna are improved. The double-fed structure is matched with the specific electric length design, and the first radiation sheet can be excited to generate circular polarization radiation, so that the anti-interference capability of the antenna in a complex environment is effectively improved, the polarization mismatch loss in the signal transmission process is reduced, and meanwhile, the working bandwidth of the antenna is also facilitated to be expanded, and the stability performance of the antenna is kept in a wider frequency range. In some embodiments, the antenna includes a substrate including a receiving space, the substrate including oppositely disposed first and second surfaces. An accommodation space is formed between the first surface and the second surface. The first radiation sheet is arranged on the first surface, and the first feed network layer is arranged on the second surface. It is understood that the first radiation sheet and the second radiation sheet are disposed on the first surface and the second surface of the substrate, respectively, and then the first metal layer and the first feeding network layer are disposed in the accommodating space. The substrate is arranged, and each structure of the antenna is arranged on the substrate, so that the substrate provides mechanical strength for each structure, and the influence of the external env