CN211719773U - Antenna - Google Patents

Abstract

The utility model discloses an antenna relates to the communication technology field, can solve the relatively poor problem of antenna performance among the prior art small-size equipment. The device includes first radiating arm, second radiating arm and connects the connector of this first radiating arm and this second radiating arm, and this first radiating arm includes PCB board and electrically conductive cloth, and wherein, the first side end and the connector of PCB board are connected, and the second end and the electrically conductive cloth of PCB board are connected, and wherein, first side end and second side end set up along the length direction of PCB board relatively.

Description

Antenna

Technical Field

The utility model relates to the field of communications, especially, relate to an antenna.

Background

The dipole is an antenna widely used, and is generally composed of two metal arms with equal length arranged at the left side and the right side, and feeding can effectively radiate at the middle position of the two metal arms. According to the electromagnetic field theory, the dipole can effectively receive or radiate electromagnetic waves with specific frequency only when the lengths of the two metal arms are moderate.

At present, a dipole is applied to many small-sized communication devices, and one metal arm of the dipole is a Printed Circuit Board (PCB). Because the dipole radiation needs a PCB with a sufficient length as a hardware support, and the size of the PCB of the small-sized communication device is usually smaller due to the product size limitation, the performance of the antenna in the small-sized device in the prior art is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, those skilled in the art have been devoted to developing an antenna that can solve the problem of poor antenna performance in the prior art small-sized devices.

In order to achieve the above object, the embodiments of the present application provide the following technical solutions:

the embodiment of the application provides an antenna, including first radiating arm, second radiating arm and the connector of connecting this first radiating arm and this second radiating arm, this first radiating arm includes PCB board and electrically conductive cloth, wherein, the first side end and this connector of this PCB board are connected, and the second side end and this electrically conductive cloth of this PCB board are connected, and first side end and second side end set up along the length direction of PCB board relatively.

Optionally, the PCB includes a first board surface and a second board surface, the connector is disposed on the first board surface, the conductive cloth is disposed on the second board surface, and the first board surface and the second board surface are disposed oppositely along a thickness direction of the PCB.

Optionally, a support member disposed on the second panel is disposed between the conductive cloth and the second panel.

Optionally, the height of the support member is 9mm-11 mm.

Optionally, the support is a battery.

Optionally, the PCB board and the conductive cloth are connected through conductive foam.

Optionally, the contact resistance between the PCB board and the conductive cloth is less than 1 ohm.

Optionally, the connector is an antenna thimble or an antenna spring.

The utility model provides an antenna has following technological effect: the first radiating arm comprises a PCB board and a conductive cloth connected with the PCB board. Because the conductive cloth that increases is partly of first radiation arm, consequently, the length of first radiation arm not only includes the length of PCB board, still includes the length of the conductive cloth that increases to can satisfy the required hardware size of antenna radiation under the prerequisite that does not increase PCB board size, and then can improve the antenna performance among the small-size communications facilities.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an antenna provided by the present invention;

fig. 2 is a schematic diagram of the position of the support member in the antenna provided by the present invention;

fig. 3 is one of schematic diagrams illustrating a connection manner between a PCB and a conductive cloth according to the present invention;

fig. 4 is a schematic cross-sectional structure diagram of a connection mode of the PCB board and the conductive cloth provided by the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

Some exemplary embodiments of the invention have been described for illustrative purposes, and it is to be understood that the invention may be practiced otherwise than as specifically described.

Some nouns or terms related to the present invention will be explained first.

Dipole antenna: refers to a communication device constructed by a section of open transmission line. According to the principle of microwave transmission lines, the current on the parallel transmission lines is distributed in a standing wave mode, when the tail ends of the two transmission lines are opened, radiation is enhanced, and when the two transmission lines are completely opened, the current directions on the two opened radiation arms are the same, and the radiation intensity is the maximum. The two radiating arms which are completely opened can generate high-frequency current, so that a radiating field is formed.

According to the microwave transmission line principle, the lengths of the two radiating arms of the dipole antenna affect the antenna radiation performance, especially the antenna radiation performance in the low frequency band. For small communication devices, the conventional solution is usually to increase the size of the product, but this makes the product form very bulky, thereby losing product competitiveness. In order to promote antenna radiation performance under the prerequisite that does not change original product size, the utility model discloses an increase a conductive cloth in product inside to turn over this conductive cloth to the scheme at the PCB board back, reach the purpose that increases PCB board size, thereby can be under the prerequisite that does not increase PCB board size, satisfied the required hardware size of antenna radiation, and then can improve the antenna performance among the small-size communications facilities.

As shown in fig. 1, the present embodiment provides an antenna including a first radiation arm 10, a second radiation arm 20, and a connector 30 connecting the first radiation arm 10 and the second radiation arm 20. Wherein one end of the connector 30 is connected to one end of the first radiating arm 10, and the other end of the connector 30 is connected to one end of the second radiating arm 20, and the first radiating arm 10 is parallel to the second radiating arm 20.

With continued reference to fig. 1, the first radiating arm 10 includes a PCB 11 and a conductive cloth 12, wherein a first side end of the PCB 11 is connected to the connector 30, and a second side end of the PCB 11 is connected to the conductive cloth 12, wherein the first side end and the second side end are oppositely disposed along a length direction of the PCB.

It should be noted that, in the case that the board surface of the PCB includes two long sides and two short sides, that is, the board surface of the PCB is rectangular, and two sides of the first side end and the second side end include two long sides; under the condition that the board surface of the PCB comprises four sides with equal length, namely the board surface of the PCB is square, two sides of the first side end and the second side end comprise any two opposite sides of the four sides with equal length.

Optionally, the PCB may be a single-sided board, a double-sided board, a four-layer board, a six-layer board, or other multi-layer circuit board, which may be determined according to actual use requirements, and this embodiment does not limit this.

The conductive fabric is a conductive fabric obtained by pretreating a fabric (for example, a polyester fabric) and then plating a metal layer thereon to provide the fabric with metallic characteristics.

Optionally, the conductive cloth may be one of nickel-plated conductive cloth, gold-plated conductive cloth, carbon-plated conductive cloth, and aluminum foil fiber composite cloth.

Alternatively, the second radiating arm 20 may be a metal conductor capable of transmitting current. The method may be determined according to actual use requirements, and this embodiment does not limit this.

Optionally, with continued reference to fig. 1, the PCB 11 may include a first board surface 1 and a second board surface 2, where the first board surface 1 and the second board surface 2 are disposed oppositely along a thickness direction of the PCB. Taking fig. 1 as an example, the first board surface 1 is an upper surface of the PCB 11, and the second board surface 2 is a lower surface of the PCB 11. The first board 1 is a board for mounting a plug-in device (such as a motor, a horn, etc.), and the second board 2 is a board having a wire and a chip element. The connector 30 can be vertically disposed on the first board 1. In order to prevent the electromagnetic wave radiated by the plug-in device from affecting the performance of the antenna, one edge of the conductive cloth 12 may be disposed on the second board 2.

It should be noted that the PCB board 11 and the conductive cloth 12 may be on the same plane in a case where a space for installing the antenna is sufficient. Thus, the radiation performance of the antenna can be better exerted. Under the condition that the space for installing the antenna is small, the conductive cloth 12 can be folded by taking the joint of the conductive cloth 12 and the PCB 11 as a fold line, so that the conductive cloth 11 is covered on the second board surface 2 without contact

Optionally, as shown in fig. 2, a supporting member 40 disposed on the second board 2 is included between the conductive cloth 12 and the second board 2, wherein the conductive cloth 12 is in contact with but not connected to the supporting member 40. The supporting member 40 may be a non-conductive device, such as a battery, mounted on the second board 2, or an insulating object, such as a plastic part or foam, attached on the second board 2.

It should be noted that the farther the distance between the conductive cloth 12 and the second board surface 2 of the PCB 11 is, the less the current transmitted on the conductive cloth 12 is affected by other devices on the PCB 11, i.e. the greater the height of the supporting member 40 is, the better the performance of the antenna is. However, the height of the support 40 may be within a predetermined range in consideration of the size limit of the small communication device.

Optionally, the height of the support member may range from 9mm to 11 mm. It should be noted that the height of the supporting member 40 can be adjusted within the predetermined range according to the actual use requirement. For example, the height of the support 40 may be 10 mm.

Alternatively, as shown in fig. 3, the conductive cloth 12 may be rectangular, and the length of the side a2 of the conductive cloth 12 may be the same as the length of the side a1 of the PCB 11, so that the path of microwave transmission may be prevented from generating abrupt changes at the connection between the PCB 11 and the conductive cloth 12, thereby improving the radiation performance of the antenna.

With continued reference to fig. 3, the sum of the length of the side b2 of the conductive cloth 12 and the length of the side b1 of the PCB board 11 may be the same as the length of the second radiation arm 20, and thus, the extended lengths of the first radiation arm 10 and the second radiation arm 20 may be the same, thereby improving the radiation performance of the antenna.

It should be noted that, in practical application, the side length of the conductive cloth 12 may be adjusted slightly according to practical use requirements.

Alternatively, as shown in fig. 4, the PCB 11 and the conductive cloth 12 may be connected by an adhesive 13. For example, the adhesive 13 may be a conductive foam.

Optionally, the contact impedance between the PCB 11 and the conductive cloth 12 is smaller than a preset value. For example, the preset value may be 1 ohm.

It should be noted that the conductive performance and thickness of the adhesive 13 may affect the contact resistance between the PCB 11 and the conductive cloth 12. Therefore, in order to reduce the contact resistance, the adhesive 13 may have a moderate thickness and a good conductivity. That is, the contact resistance between the PCB 11 and the conductive cloth 12 can be controlled to be below a predetermined value by changing the material and thickness of the adhesive 13.

Optionally, the connector 30 may be an antenna thimble or an antenna spring. The antenna spring plate can be a straight cantilever type plate spring, and the material of the spring plate can be bronze. The antenna thimble can be a spring type probe which consists of three basic components, namely a needle shaft, a spring and a needle tube and is formed after riveting and prepressing through a precision instrument.

Alternatively, in the case where the connector 30 is an antenna thimble or an antenna spring, the connector 30 may include an elastic end and a non-elastic end. The non-elastic end may be welded to one end of the first radiating arm 10; the elastic end may be in contact with but not connected to an end of the second radiation arm 20, and in particular, the second radiation arm 20 may be pressed against the end of the connector 30 having elasticity under the support of the outer case of the communication device.

The utility model provides an antenna has following technological effect: the first radiating arm comprises a Printed Circuit Board (PCB) and a conductive cloth connected with the PCB. Because the conductive cloth that increases is partly of first radiation arm, consequently, the length of first radiation arm not only includes the length of PCB board, still includes the length of the conductive cloth that increases to can satisfy the required hardware size of antenna radiation under the prerequisite that does not increase PCB board size, and then can improve the antenna performance among the small-size communications facilities.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (8)

1. The utility model provides an antenna, its characterized in that includes first radiating arm, second radiating arm and connects first radiating arm with the connector of second radiating arm, first radiating arm includes PCB board and electrically conductive cloth, wherein, the first side of PCB board with the connector is connected, the second side of PCB board with electrically conductive cloth is connected, first side with the second side is followed the length direction of PCB board sets up relatively.

2. The antenna of claim 1, wherein the PCB comprises a first board surface and a second board surface, the connector is disposed on the first board surface, the conductive cloth is disposed on the second board surface, and the first board surface and the second board surface are disposed opposite to each other in a thickness direction of the PCB.

3. The antenna of claim 2, wherein a support member is disposed on the second panel between the conductive cloth and the second panel.

4. An antenna according to claim 3, wherein the height of the support member is 9mm to 11 mm.

5. An antenna according to any of claims 3 to 4, wherein the support member is a battery.

6. The antenna of claim 1, wherein the PCB board is connected to the conductive cloth by a conductive foam.

7. The antenna of claim 1, wherein a contact impedance between the PCB board and the conductive cloth is less than 1 ohm.

8. The antenna of claim 1, wherein the connector is an antenna thimble or an antenna spring.

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