WO2021082704A1

WO2021082704A1 - Antenna and door lock

Info

Publication number: WO2021082704A1
Application number: PCT/CN2020/112167
Authority: WO
Inventors: 尹柳中; 王子同; 谢仁礼; 杨福军
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2019-10-29
Filing date: 2020-08-28
Publication date: 2021-05-06
Also published as: CN210607618U

Abstract

Disclosed by the present application are an antenna and a door lock. The antenna comprises a substrate, the substrate is provided with a radiation piece and a metal piece, the metal piece is provided with an installation hole, and the radiation piece is located in the installation hole and is spaced apart from the metal piece. By means of adding a metal piece at the periphery of the radiation piece and isolating the metal piece from the radiation piece, the metal piece of the present invention may effectively isolate the electromagnetic effect that surrounds a metal environment, which is beneficial in preventing electromagnetic leakage in a metal environment region, so that energy may more fully radiate outwards toward the metal environment region. Thus, the gain of the antenna is increased such that the radiation piece can operate normally close to the metal environment, the anti-metal performance of the antenna is enhanced, and there is no need to provide clearance for the radiation piece.

Description

Antenna and door lock

priority

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on October 29, 2019, the application number is "201921865823.5", and the application name is "an antenna and door lock", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the technical field of antenna locks, in particular to an antenna and a door lock.

Background technique

At present, the commonly used antennas are non-metal-resistant antennas, that is, the existing antennas must be separated from the metal by a certain distance, otherwise they cannot work normally. For example, when the existing antennas are applied to door locks, the normal use environment for door lock users is between the indoor router and the antenna. For wireless communication connection, the existing antenna cannot work close to the metal lock body and must be separated from the metal lock body for a certain distance, otherwise the metal lock body will interfere with the antenna, so that the door lock must provide a certain clearance for the antenna, so that the antenna and the metal lock body have a certain distance. This will undoubtedly increase the volume and cost of the door lock.

Therefore, the existing technology needs to be improved and developed.

Application content

The technical problem to be solved by this application is to provide an antenna and a door lock in response to the above-mentioned defects of the prior art, aiming to solve the technical problem that the existing antenna is affected by metal and needs to provide clearance.

The technical solutions adopted by this application to solve the technical problems are as follows:

An antenna comprising a substrate, a radiating sheet is provided on the substrate, wherein a metal sheet is further provided on the substrate, a mounting hole is provided on the metal sheet, and the radiating sheet is located in the mounting hole and is connected to the mounting hole. The metal sheets are spaced apart.

In the antenna, a grounded conductive layer is provided on the side of the substrate away from the radiating sheet, and the grounded conductive layer is electrically connected to the radiating sheet and the metal sheet, respectively.

The antenna, wherein the substrate is provided with a first via hole at a position corresponding to the metal sheet, and a first conductive hole for electrically connecting the metal sheet and the ground conductive layer is provided in the first via hole. Layer; one end of the first conductive layer is electrically connected to the metal sheet, and the other end is electrically connected to the ground conductive layer.

The antenna, wherein the first via hole penetrates the substrate along the arrangement direction of the ground conductive layer and the metal sheet, and the first via hole is located in the projection of the metal sheet on the substrate Place.

In the antenna, a plurality of first through holes are provided on the metal sheet, and the first through holes correspond to the first via holes one-to-one; the first conductive layer extends to the first through holes And connected with the inner wall of the first through hole.

In the antenna, the inner diameter of the first through hole is equal to the inner diameter of the first via hole.

The antenna, wherein the substrate is provided with a second via hole corresponding to the radiating sheet, and a second conductive layer for electrically connecting the radiating sheet and the ground conductive layer is provided in the second via hole One end of the second conductive layer is electrically connected to the radiating sheet, and the other end is electrically connected to the grounded conductive layer.

The antenna, wherein the second via hole penetrates the substrate along the arrangement direction of the ground conductive layer and the metal sheet, and the second via hole is located in the projection of the radiation sheet on the substrate Place.

The antenna, wherein a second through hole is provided on the radiating sheet, the second through hole corresponds to the second through hole, the second conductive layer extends into the second through hole, and Connected with the inner wall of the second through hole.

In the antenna, the inner diameter of the second through hole is equal to the inner diameter of the second via hole.

In the antenna, the metal sheet has a circular ring shape.

In the antenna, the radiating sheet and the mounting hole are both circular, and the radiating sheet is located at the center of the mounting hole.

In the antenna, the central axis of the radiating sheet coincides with the central axis of the mounting hole; any part of the edge of the radiating sheet is equidistant from the metal sheet.

In the antenna, the ground conductive layer and the metal sheet are respectively located on both sides of the thickness direction of the substrate, and the radiating sheet corresponds to the center of the substrate.

The antenna, wherein the substrate is covered with solder mask green oil except for the projection area of the radiation sheet and the metal sheet; the positions on the substrate corresponding to the radiation sheet and the metal sheet are all tin-plated .

A door lock, the door lock includes the antenna as described in any one of the above, and the door lock further includes a metal lock body, and the metal sheet is electrically connected to the metal lock body.

In the door lock, the metal sheet is in contact with or coupled with the metal lock body, so that the metal sheet and the metal lock body are electrically connected.

Beneficial effects: In this application, by adding the metal sheet to the periphery of the radiation sheet and isolating the metal sheet from the radiation sheet, the metal sheet can effectively isolate the electromagnetic influence of the surrounding metal environment. It is beneficial to prevent electromagnetic leakage into the metal environment area, so that more energy can be radiated to the outside of the metal environment area, thereby increasing the gain of the antenna, so that the radiating sheet can work normally near the metal environment, and improving the anti-metal performance of the antenna , There is no need to provide headroom for the radiator.

Description of the drawings

Figure 1 is a first view of the antenna described in this application;

Figure 2 is a second view of the antenna described in the present application;

Fig. 3 is a schematic diagram of the structure of the substrate in the present application;

Fig. 4 is a horizontal pattern of the antenna described in this application;

Fig. 5 is a schematic diagram of the standing wave ratio of the antenna described in the present application;

Fig. 6 is a schematic diagram of radiation of the antenna around the door lock in the present application;

Fig. 7 is a cross-sectional view of the antenna described in the present application;

FIG. 8 is a schematic diagram of the electrical connection structure between the metal sheet and the ground conductive layer in the present application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of this application clearer and clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

The present application provides an antenna, as shown in FIG. 1, which includes a substrate 1 and a radiating sheet 2 and a metal sheet 3 arranged on the substrate 1; the metal sheet 3 is provided with a mounting hole (not shown), The metal sheet 3 is sleeved on the periphery of the radiation sheet 2 so that the radiation sheet 2 is placed in the mounting hole; the radiation sheet 2 and the metal sheet 3 are spaced apart, that is, the radiation There is no contact between the sheet 2 and the metal sheet 3. It should be noted that the diagonal lines on the radiation sheet 2 and the metal sheet 3 in FIG. 1 are only used to distinguish the radiation sheet 2, the metal sheet 3 and the substrate 1. It is not used to explain the antenna structure.

In the present application, the metal sheet 3 is added to the periphery of the radiation sheet 2, and the metal sheet 3 is isolated from the radiation sheet 2. The metal sheet 3 can effectively isolate the electromagnetic influence of the surrounding metal environment. It is beneficial to prevent electromagnetic leakage into the metal environment area, so that more energy can be radiated outside the metal environment area, thereby increasing the gain of the antenna, so that the radiating sheet 2 can work normally close to the metal environment, and improving the resistance of the antenna. Metal performance, no need to provide clearance for the radiator 2.

As shown in FIGS. 2 and 7, a grounded conductive layer 4 is provided on the side of the substrate 1 away from the radiation sheet 2, and the grounded conductive layer 4 is electrically connected to the radiation sheet 2 and the metal sheet 3. , So as to realize the grounding of the radiating sheet 2 and the grounding of the metal sheet 3.

As shown in FIGS. 3 and 8, the substrate 1 is provided with a plurality of first via holes 5, and the first via holes 5 penetrate the ground conductive layer 4 and the metal sheet 3 in the arrangement direction. The substrate 1 and the first via hole 5 are located at the projection of the metal sheet 3 on the substrate 1 so that the plurality of first via holes all correspond to the metal sheet 3. A first conductive layer 100 is provided in the first via hole 5, and the first conductive layer 100 is used to electrically connect the ground conductive layer 4 and the metal sheet 3; specifically, the first conductive layer Both ends of 100 are electrically connected to the grounded conductive layer 4 and the metal sheet 3, so that the metal sheet 3 can be electrically connected to the grounded conductive layer 4 through the first conductive layer 100, thereby realizing the The metal sheet 3 is grounded.

In one implementation, as shown in FIG. 1, a plurality of first through holes 6 are provided on the metal sheet 3, and the first through holes 6 and the first via holes 5 are in one-to-one correspondence and communicate with each other. , And the inner diameter of the first through hole 6 is equal to the inner diameter of the first via hole 5; as shown in FIG. 8, the end of the first conductive layer 100 away from the ground conductive layer 4 faces the metal sheet It extends in three directions into the first through hole 6 and is connected to the inner wall of the first through hole 6.

In this application, the extension of the first conductive layer 100 from the first via hole 5 into the first via hole 6 and the connection between the first conductive layer 100 and the inner wall of the first via hole 6 are used. The stability of the connection between the metal sheet 3 and the first conductive layer 100 is improved, and the stability of the electrical connection between the metal sheet 3 and the ground conductive layer 4 is improved.

As shown in FIG. 3, a second via hole 7 is provided on the substrate 1, and the second via hole 7 penetrates the substrate 1 along the arrangement direction of the ground conductive layer 4 and the metal sheet 3; The second via hole 7 is located at the projection of the radiation sheet 2 on the substrate 1 so that the second via hole 7 can correspond to the radiation sheet 2. A second conductive layer (not shown) is provided in the second via hole 7, and the second conductive layer is used to electrically connect the ground conductive layer 4 and the radiating sheet 2; specifically, the first Both ends of the two conductive layers are electrically connected to the grounded conductive layer 4 and the radiating sheet 2 respectively, so that the second conductive layer is electrically connected between the radiating sheet 2 and the grounded conductive layer 4 in the present application. Connect, so that the radiating sheet 2 is grounded.

In one implementation, as shown in FIG. 1, a second through hole 8 is provided on the radiation sheet 2, and the second through hole 8 corresponds to the second via hole 7 and communicates with each other; The inner diameter of the second through hole 8 is equal to the inner diameter of the second through hole 7, and the end of the second conductive layer away from the ground conductive layer 4 extends toward the radiating sheet 2 to the second through hole 8 , And connected with the inner wall of the second through hole 8.

In this application, the extension of the second conductive layer from the second via hole 7 into the second via hole 8 and the connection between the second conductive layer and the inner wall of the second via hole 8 improve The stability of the connection between the radiation sheet 2 and the second conductive layer further improves the stability of the electrical connection between the radiation sheet 2 and the ground conductive layer 4.

In one implementation, as shown in FIG. 1, the metal sheet 3 in the present application has a circular ring shape, the radiating sheet 2 and the mounting hole are both circular, and the radiating sheet 2 is located in the mounting hole. At the center of the hole, and the central axis of the radiating sheet 2 coincides with the central axis of the mounting hole, so that any part of the edge of the radiating sheet 2 and the metal sheet 3 are equally spaced, the The metal sheet 3 can evenly protect against electromagnetic leakage from the periphery of the radiation sheet 2.

In this application, the substrate 1 is an FR4 dielectric substrate 1, and the dielectric constant of the substrate 1 is 4.3.

The diameter of the radiating sheet 2 is 33.4 mm, and the diameter of the mounting hole is 58 mm, which ensures that the radiating sheet 2 will not contact the inner wall of the mounting hole when it is placed in the mounting hole.

The length and width of the substrate 1 are both 60 mm, the thickness of the substrate 1 is 2 mm, the ground conductive layer 4 and the metal sheet 3 are respectively located on both sides of the thickness direction of the substrate 1, and the radiation sheet 2 corresponds to the center of the substrate 1, that is, the central axis of the substrate 1 passes through the radiating sheet 2.

In this application, the substrate 1 except for the positions corresponding to the radiation sheet 2 and the metal sheet 3, that is, the substrate 1 except for the projection area of the radiation sheet 2 and the metal sheet 3 is covered with solder resist Green oil; on the substrate 1 corresponding to the radiation sheet 2 and the metal sheet 3 positions are plated with tin to ensure the stability of the radiation sheet 2 and the metal sheet 3 assembled on the substrate 1.

As shown in FIG. 6, the present application also provides a door lock, which includes the antenna described in any one of the above items, and further includes a metal lock body, which is electrically connected to the metal sheet 3, so The metal sheet 3 is isolated from the radiation sheet 2. The metal sheet 3 can effectively isolate the electromagnetic influence of the metal lock body, which is beneficial to prevent electromagnetic leakage into the metal lock body, so that more energy can be obtained. It radiates to the outside of the metal lock body, thereby increasing the gain of the antenna, so that the radiating sheet 2 can work normally close to the metal lock body, improving the anti-metal performance of the antenna, and providing clearance for the radiating sheet 2 without a door lock. The volume of the door lock is reduced, and the production cost is reduced.

In an implementation manner, the metal sheet 3 and the metal lock body in the present application are in contact with each other, so as to achieve an electrical connection between the metal sheet 3 and the metal lock body, so as to limit electromagnetic leakage. , Which is conducive to overall electromagnetic compatibility and improves the antenna gain.

In an implementation manner, the metal sheet 3 and the metal lock body are coupled with each other in the present application, so as to realize the electrical connection between the metal sheet 3 and the metal lock body.

The horizontal pattern of the antenna is shown in Fig. 4 (the abscissa represents the frequency, the ordinate represents the standing wave ratio), and the measured standing wave ratio (VSWR) characteristic diagram of the antenna is shown in Fig. 5, the VSWR in the frequency band is less than 2. The communication stability between the antenna and the indoor router can be improved; the radiation intensity of the antenna around the door lock is shown in Figure 6, where the slanted lines indicate the radiation area, and the densely slashed areas indicate more radiation. The strong area and the obliquely sparse area indicate the weaker radiation area. It can be seen from FIG. 6 that the energy of the antenna described in this application is more radiated to the outside of the metal lock.

In summary, the present application provides an antenna and a door lock. The antenna includes a substrate on which a radiating sheet and a metal sheet are arranged. The metal sheet is provided with a mounting hole, and the radiating sheet is located on the Inside the mounting hole and spaced from the metal sheet. In this application, by adding the metal sheet on the periphery of the radiation sheet and isolating the metal sheet from the radiation sheet, the metal sheet can effectively isolate the electromagnetic influence of the surrounding metal environment, which is beneficial to prevent electromagnetic waves. Leaking into the metal environment area, so that more energy can be radiated to the outside of the metal environment area, thereby increasing the gain of the antenna, so that the radiating sheet can work normally near the metal environment, and improving the anti-metal performance of the antenna. The radiating sheet provides headroom.

It should be understood that the application of this application is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of this application.

Claims

An antenna comprising a substrate and a radiating sheet arranged on the substrate, wherein the substrate is further provided with a metal sheet, the metal sheet is provided with a mounting hole, and the radiating sheet is located in the mounting hole and Spaced from the metal sheet.
The antenna according to claim 1, wherein a grounded conductive layer is provided on a side of the substrate away from the radiating sheet, and the grounded conductive layer is electrically connected to the radiating sheet and the metal sheet, respectively.
The antenna according to claim 2, wherein the substrate is provided with a first via hole at a position corresponding to the metal sheet, and a first via hole is provided in the first via hole for electrically connecting the metal sheet and the ground conductive layer. Connected first conductive layer; one end of the first conductive layer is electrically connected to the metal sheet, and the other end is electrically connected to the grounded conductive layer.
The antenna according to claim 3, wherein the first via hole penetrates the substrate along the arrangement direction of the ground conductive layer and the metal sheet, and the first via hole is located where the metal sheet is located. The projection on the substrate.
The antenna according to claim 3, wherein a plurality of first through holes are provided on the metal sheet, and the first through holes correspond to the first via holes one to one; and the first conductive layer extends to the Inside the first through hole and connected with the inner wall of the first through hole.
The antenna according to claim 5, wherein the inner diameter of the first through hole is equal to the inner diameter of the first via hole.
The antenna according to claim 2, wherein the substrate is provided with a second via hole corresponding to the radiating sheet, and a second via hole is provided in the second via hole for electrically connecting the radiating sheet and the ground conductive layer. The second conductive layer; one end of the second conductive layer is electrically connected to the radiating sheet, and the other end is electrically connected to the grounded conductive layer.
The antenna according to claim 7, wherein the second via hole penetrates the substrate along the arrangement direction of the ground conductive layer and the metal sheet, and the second via hole is located where the radiating sheet is located. The projection on the substrate.
7. The antenna according to claim 7, wherein the radiating sheet is provided with a second through hole, the second through hole corresponds to the second via hole, and the second conductive layer extends to the second Inside the through hole and connected with the inner wall of the second through hole.
The antenna according to claim 9, wherein the inner diameter of the second through hole is equal to the inner diameter of the second via hole.
The antenna according to claim 1, wherein the metal sheet has a circular ring shape.
The antenna according to claim 11, wherein the radiating sheet and the mounting hole are both circular, and the radiating sheet is located at the center of the mounting hole.
The antenna according to claim 12, wherein the central axis of the radiating sheet coincides with the central axis of the mounting hole; any position of the edge of the radiating sheet is equidistant from the metal sheet.
The antenna according to claim 13, wherein the ground conductive layer and the metal sheet are respectively located on both sides of the thickness direction of the substrate, and the radiation sheet corresponds to the center of the substrate.
The antenna according to claim 14, wherein the substrate is covered with solder mask green oil except for the projection area of the radiation sheet and the metal sheet; the substrate corresponds to the radiation sheet and the metal sheet All locations are tin-plated.
A door lock, wherein the door lock includes the antenna according to any one of claims 1-15, and the door lock further includes a metal lock body, and the metal sheet is electrically connected to the metal lock body .
The door lock according to claim 16, wherein the metal sheet is in contact with or coupled with the metal lock body, so that the metal sheet and the metal lock body are electrically connected.