CN113904095A - Dielectric plate, antenna unit, antenna structure and wireless communication device - Google Patents

Abstract

The application provides a dielectric plate, antenna unit, antenna structure and wireless communication device, the dielectric plate includes base plate body and ground connection portion, the base plate body is including relative upper surface and the lower surface that sets up and connection the upper surface with the lateral wall of lower surface, it is regional to be provided with the antenna on the upper surface, the lateral wall is including being close to the regional first lateral wall of antenna with keep away from the regional second lateral wall of antenna, the antenna connection the antenna region is, through ground connection portion sets up on the second lateral wall to ground connection handles, is used for increasing the ground connection area of antenna guarantees the miniaturization of base plate body area, and effectively increases the radiating area of antenna, promotes the work efficiency of antenna, reduces antenna radiation dead angle.

Description

Dielectric plate, antenna unit, antenna structure and wireless communication device

Technical Field

The present invention relates to the field of antenna technologies, and in particular, to a dielectric plate, an antenna unit, an antenna structure, and a wireless communication device.

Background

An antenna is a transducer that can convert a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or an electromagnetic wave propagating in free space into a guided wave propagating on a transmission line. Antennas are widely used in engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, radio astronomy, and most of the devices that transmit information using electromagnetic waves operate with antennas. Therefore, most electronic products also use an antenna to transmit signals.

Since most of the electronic products are developed in a direction of being light, thin, short and small, the application of the antenna to the electronic products is limited by space, but still needs to achieve the corresponding radiation effect. Therefore, the difficulty of the antenna-related miniaturized product in manufacturing is getting bigger and bigger, and in the aspect of antenna layout, because the area or height of an electronic product is limited, the area of the antenna needs to be strictly limited, so that the length of the antenna cannot reach the required standard, and further, the frequency point of the antenna cannot reach the working frequency range, even the deviation is too large.

Disclosure of Invention

In view of the above, it is desirable to provide a dielectric plate, an antenna unit, an antenna structure and a wireless communication device, which optimize the size of the antenna, ensure the radiation performance of the antenna and reduce the radiation dead angle.

One embodiment of the present application provides a dielectric plate, including a substrate body and a grounding part;

the substrate body comprises an upper surface, a lower surface and a side wall, wherein the upper surface and the lower surface are oppositely arranged, the side wall is used for connecting the upper surface and the lower surface, the upper surface is provided with an antenna area and is used for connecting an antenna, and the side wall comprises a first side wall close to the antenna area and a second side wall far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna.

According to some embodiments of the present application, the second sidewall includes a third sidewall disposed opposite the first sidewall.

According to some embodiments of the present application, the second sidewall comprises a fourth sidewall adjacent to the first sidewall.

According to some embodiments of the application, the second sidewall comprises a fifth sidewall that is coplanar with the first sidewall and distal from the antenna area.

According to some embodiments of the present application, the fifth sidewall comprises a sixth sidewall and/or a seventh sidewall;

the sixth sidewall comprises a left sidewall to the left of the first sidewall;

the seventh side wall includes a right side wall located to the right of the first side wall.

According to some embodiments of the application, the grounding portion comprises a metal foil.

According to some embodiments of the present application, the metal foil comprises copper foil.

An embodiment of the present application provides an antenna unit, including an antenna and the dielectric plate described above;

the dielectric plate comprises a substrate body and a grounding part, wherein the substrate body comprises an upper surface and a lower surface which are oppositely arranged and a side wall which is connected with the upper surface and the lower surface, an antenna area is arranged on the upper surface, and the side wall comprises a first side wall which is close to the antenna area and a second side wall which is far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna;

the antenna is connected to the antenna area.

An embodiment of the present application provides an antenna structure, including a control unit and the antenna unit as described above;

the antenna unit comprises a dielectric plate and an antenna;

the dielectric plate comprises a substrate body and the grounding part, the substrate body comprises an upper surface and a lower surface which are oppositely arranged, and a side wall which is connected with the upper surface and the lower surface, the upper surface is provided with an antenna area and the control unit, and the side wall comprises a first side wall which is close to the antenna area and a second side wall which is far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna;

the antenna is connected with the antenna area;

the control unit is connected with the antenna.

An embodiment of the present application provides a wireless communication device, including a housing and the antenna structure as described above;

the antenna structure is disposed in the housing.

The dielectric plate, the antenna unit, the antenna structure and the wireless communication device provided by the embodiment of the application, the dielectric plate comprises a substrate body and a grounding portion, the substrate body comprises an upper surface and a lower surface which are oppositely arranged and is connected with the upper surface and a side wall of the lower surface, an antenna region is arranged on the upper surface, the side wall comprises a first side wall close to the antenna region and a second side wall far away from the antenna region, the antenna is connected with the antenna region, the grounding portion is arranged on the second side wall and is used for being grounded and increasing the grounding area of the antenna, so that the radiating area of the antenna is increased, the grounding portion is arranged on the side wall, the miniaturization of the area of the dielectric plate is guaranteed, the radiating area of the antenna is effectively increased, the working efficiency of the antenna is improved, and the radiating dead angle of the antenna is reduced.

Drawings

FIG. 1 is a schematic diagram of a wireless communication device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an antenna structure according to an embodiment of the present application;

fig. 3 is a schematic diagram of an antenna unit according to an embodiment of the present application;

FIG. 4 is a schematic view of a dielectric plate without a grounding portion according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a dielectric plate grounding section according to an embodiment of the present application;

fig. 6 is a plan view of a dielectric plate provided with a grounding portion according to an embodiment of the present application;

fig. 7 is a front view of a substrate body without copper foil laid on sidewalls thereof according to an embodiment of the present application;

fig. 8 is a front view of copper foil laid on the side walls of the substrate body according to an embodiment of the present application;

fig. 9 is a perspective view of copper foil laid on a sidewall of a substrate body according to an embodiment of the present application;

FIG. 10 is a graph of the results of the non-reflective laboratory test corresponding to FIG. 7;

fig. 11 is a graph of the results of the non-reflective laboratory tests corresponding to fig. 8.

Description of the main elements

Wireless communication device 100

Antenna structure 10

Housing 20

Antenna unit 30

Control unit 40

Dielectric sheet 50

Antenna 60

Substrate body 70

Upper surface 71

Lower surface 72

Side wall 73

Antenna region 74

First side wall 731

Second side wall 732

Grounding part 80

Copper foil 81

Third side wall 7321

Fourth side wall 7322

Fifth side wall 7325

Sixth side wall 7323

Seventh side wall 7324

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application.

All other embodiments that can be obtained by a person skilled in the art without inventive step based on the embodiments in this application are within the scope of protection of this application.

Referring to fig. 1, a wireless communication device 100 includes an antenna structure 10 and a housing 20, wherein the antenna structure 10 is disposed in the housing 20.

In the embodiment of the present application, the housing 20 is used for accommodating the antenna structure 10 to provide support and protection for the antenna structure 10.

In the embodiment of the present application, the antenna structure 10 is used for transmitting and receiving radio waves to transmit and exchange wireless signals.

In the embodiment of the present application, the wireless communication device 100 may be a mobile phone, a personal digital assistant, a smart headset, or the like.

In the embodiment of the present application, the wireless communication device 100 is a bluetooth headset.

Referring to fig. 2, in one embodiment, the antenna structure 10 includes an antenna element 30 and a control unit 40.

In the embodiment of the present application, the control unit 40 is electrically connected to the antenna unit 30, and is configured to control the operation of the antenna unit 30, that is, to control the antenna unit 30 to receive the transmitted and received radio waves to transmit and exchange wireless signals.

In one possible implementation manner, the control unit 40 includes a bluetooth control chip, and is configured to control the antenna structure 10 to receive a bluetooth signal or transmit a bluetooth signal. Referring to fig. 3, in one embodiment, the antenna unit 30 includes a dielectric plate 50 and an antenna 60.

In the present embodiment, the antenna 60 is used to radiate and receive radio waves and provides the required coupling between the transmitter or receiver in the wireless communication device 100 and the medium through which the radio waves propagate.

In the embodiment of the present application, the antenna 60 is grounded, and the antenna 60 may be a monopole antenna, and the monopole antenna is mounted on a ground plane, which may be an actual ground plane or an artificial ground plane such as a vehicle body of a vehicle.

The working principle of the antenna 60 is briefly described as follows:

at the transmitting end, modulated high-frequency oscillation current (energy) generated by a transmitter is input into a transmitting antenna through a feed device, wherein the feed device can directly transmit current waves or electromagnetic waves according to different frequencies and forms, and the transmitting antenna converts the high-frequency current or the guided wave (energy) into radio waves, namely free electromagnetic waves (energy) to radiate to the surrounding space. At the receiving end, the radio waves (energy) are converted into high-frequency currents or guided waves (energy) by the receiving antenna, and are transmitted to the receiver through the feed device. The antenna is not only a device for radiating and receiving radio waves, but also an energy converter, which is an interface device between a circuit and a space.

In the embodiment of the present application, the dielectric plate 50 serves as a circuit substrate for carrying the antenna 60 and the control unit 40.

Referring to fig. 4 and 5, in one embodiment, the dielectric plate 50 includes a substrate body 70 and a grounding portion 80, the substrate body 70 includes an upper surface 71 and a lower surface 72 that are oppositely disposed, and a sidewall 73 that connects the upper surface 71 and the lower surface 72, and an antenna region 74 is disposed on the upper surface 71.

In the embodiment of the present invention, the dielectric plate 50 is used to provide a support for the antenna 60, and the substrate body 70 may include a printed circuit board, an FR-4 epoxy glass cloth laminated board, which is not particularly limited in this application.

Referring to fig. 5, the side wall 73 includes a first side wall 731 near the antenna region 74 and a second side wall 732 far from the antenna region 74. The antenna 60 is connected to the antenna area 74.

The grounding portion 80 is provided on the second side wall 732, the grounding portion 80 performs grounding processing, and the grounding portion 80 is connected to the ground. It is understood that the antenna 60 is also connected to the ground, and the ground 80 is disposed on the second sidewall 732, so as to increase the ground area of the antenna 60, thereby increasing the radiation area of the antenna 60. The side wall 73 of the dielectric plate 50 is fully utilized to ensure the miniaturization of the area of the dielectric plate 50.

In one embodiment, the grounding portion 80 is a metal foil.

In one embodiment, the metal foil is a copper foil.

In the embodiment of the present application, referring to fig. 6, fig. 6 is a top view of a dielectric board 50 provided in the embodiment of the present application, taking the substrate body 70 as an FR-4 epoxy glass cloth laminated board as an example, on which an antenna area 74 is provided for connecting an antenna 60. The sidewall 73 of the FR-4 epoxy glass cloth laminate is provided with the grounding portion 80, except that the first sidewall 731 adjacent to the antenna region 74 is not provided with the grounding portion 80, the second sidewall 732 can be selectively provided with the grounding portion 80, and the grounding area of the antenna 60 is increased through the grounding portion 80, so that the radiation area of the antenna 60 is increased, and the radiation capability of the antenna 60 is improved. In the present embodiment, the copper foil 81 is entirely laid on the second side wall 732 of the FR-4 epoxy glass cloth laminate to form the ground portion 80. Referring to fig. 7, fig. 7 is a front view of the side wall 73 of the substrate body 70 without the copper foil 81, and referring to fig. 8, fig. 8 is a front view of the second side wall 732 of the substrate body 70 provided in the embodiment of the present application with the copper foil 81 laid thereon, and fig. 9 is a perspective view of the second side wall 732 of the substrate body 70 provided in the embodiment of the present application with the copper foil 81 laid thereon.

In one embodiment, the second sidewall 732 includes a third sidewall 7321 opposite to the sidewall where the first sidewall 731 is located.

In one embodiment, the second side wall 732 includes a fourth side wall 7322 adjacent to the first side wall 731.

In one embodiment, the second side wall 732 includes a fifth side wall 7325 which is coplanar with the first side wall 731 and is away from the antenna region 74.

In one embodiment, the fifth sidewall 7325 includes a sixth sidewall 7323 and/or a seventh sidewall 7324.

The sixth side wall 7323 includes a left side wall located to the left of the first side wall 731.

The seventh side wall 7324 includes a right side wall located to the right of the first side wall 731.

In the present embodiment, referring to fig. 9, the second sidewall 732 may optionally include one or more of the following: a third side wall 7321 disposed opposite to the side wall on which the first side wall 731 is located, a fourth side wall 7322 adjacent to the side wall on which the first side wall 731 is located, and a fifth side wall 7325 on the first side wall 731 away from the antenna region 74, where the fifth side wall 7325 may include a sixth side wall 7323 and/or a seventh side wall 7324, the sixth side wall 7323 includes a left side wall located to the left of the first side wall 731, and the seventh side wall 7324 includes a right side wall located to the right of the first side wall 731.

In one implementation, the dielectric board 50 is formed by laying a copper foil 81 on the third sidewall 7321.

In one implementation, the dielectric board 50 is formed by spreading a copper foil 81 on the fourth sidewall 7322.

In one implementation, the dielectric board 50 is formed by laying a copper foil 81 on the fifth sidewall 7325.

In one implementation, the dielectric board 50 is formed by spreading a copper foil 81 on the sixth sidewall 7323.

In one implementation, the dielectric board 50 is formed by laying a copper foil 81 on the seventh side wall 7324.

In one implementation, the dielectric board 50 is formed by spreading copper foils 81 on the third side wall 7321 and the fourth side wall 7322.

In one implementation, the dielectric board 50 is formed by spreading copper foil 81 on each of the third side wall 7321, the fourth side wall 7322, the seventh side wall 7324, and/or the sixth side wall 7323.

In the embodiment of the present application, the dielectric plate 50 may be applied to a radio frequency circuit or a microwave circuit.

In the embodiment of the present application, since the dielectric plate radiation area of the bluetooth headset using the antenna 60 is too small, the grounding area of the antenna 60 is increased by using the manner that the copper foil 81 is laid on the sidewall 73 of the dielectric plate 50, so as to increase the radiation area of the antenna 60, effectively improve the working efficiency of the antenna 60, reduce the radiation dead angle, effectively increase the effective distance for the bluetooth headset to receive signals, and perform the verification of the radiation intensity by placing the bluetooth headset in a non-reflection laboratory.

Referring to fig. 10, fig. 10 is a graph corresponding to the test result of the unreflected laboratory of the bluetooth headset without the copper foil 81 in fig. 7, and the test result shows that the radiation intensity of a part of the angle in the 3D field of the bluetooth headset without the copper foil 81 laid on the sidewall 73 is weak, which is easy to cause the interruption of the transmission and reception signals at the angle. Meanwhile, referring to fig. 11, fig. 11 is a non-reflection laboratory test result diagram of the bluetooth headset with the copper foil 81 laid in fig. 8, and the test result shows that the radiation intensity distribution of the 3D field type of the bluetooth headset with the copper foil 81 laid on the side wall 73 is more uniform, so that the omnidirectional radiation range is obviously improved, and the dead angle is greatly improved.

The dielectric plate, the antenna unit, the antenna structure and the wireless communication device provided by the embodiment of the application, the dielectric plate comprises a substrate body 70 and a grounding part 80, wherein the substrate body 70 comprises an upper surface 71 and a lower surface 72 which are oppositely arranged and a side wall 73 which connects the upper surface 71 and the lower surface 72, the upper surface 71 is provided with an antenna region 74, the side wall 73 includes a first side wall 731 close to the antenna region 74 and a second side wall 732 far from the antenna region 74, the antenna 60 is connected to the antenna region 74, disposed on the second sidewall 732 through the grounding portion 80, for increasing the grounding area of the antenna 60, the grounding part 80 is arranged on the side wall 73, ensuring the miniaturization of the area of the substrate body 70, and effectively increase the radiating area of antenna 60, promote the work efficiency of antenna 60, reduce antenna 60 radiation dead angle.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. A dielectric plate is characterized by comprising a substrate body and a grounding part;

the substrate body comprises an upper surface, a lower surface and a side wall, wherein the upper surface and the lower surface are oppositely arranged, the side wall is used for connecting the upper surface and the lower surface, the upper surface is provided with an antenna area and is used for connecting an antenna, and the side wall comprises a first side wall close to the antenna area and a second side wall far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna.

2. The dielectric plate of claim 1, wherein the second sidewall includes a third sidewall disposed opposite the first sidewall.

3. The dielectric plate of claim 1, wherein the second sidewall comprises a fourth sidewall adjacent to the first sidewall.

4. The dielectric plate of claim 1, wherein the second sidewall includes a fifth sidewall that is on the same plane as the first sidewall and is remote from the antenna area.

5. The dielectric plate of claim 4, wherein the fifth sidewall comprises a sixth sidewall and/or a seventh sidewall;

the sixth sidewall comprises a left sidewall to the left of the first sidewall;

the seventh side wall includes a right side wall located to the right of the first side wall.

6. The dielectric plate of any one of claims 1 to 5, wherein the grounding portion comprises a metal foil.

7. The dielectric sheet of claim 6, wherein the metal foil comprises copper foil.

8. An antenna unit comprising an antenna and a dielectric plate according to any one of claims 1 to 7;

the dielectric plate comprises a substrate body and a grounding part, wherein the substrate body comprises an upper surface and a lower surface which are oppositely arranged and a side wall which is connected with the upper surface and the lower surface, an antenna area is arranged on the upper surface, and the side wall comprises a first side wall which is close to the antenna area and a second side wall which is far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna;

the antenna is connected to the antenna area.

9. An antenna arrangement, characterized in that it comprises a control unit and an antenna unit according to claim 8;

the antenna unit comprises a dielectric plate and an antenna;

the dielectric plate comprises a substrate body and the grounding part, the substrate body comprises an upper surface and a lower surface which are oppositely arranged, and a side wall which is connected with the upper surface and the lower surface, the upper surface is provided with an antenna area and the control unit, and the side wall comprises a first side wall which is close to the antenna area and a second side wall which is far away from the antenna area;

the grounding part is arranged on the second side wall, performs grounding treatment and is used for increasing the grounding area of the antenna;

the antenna is connected with the antenna area;

the control unit is connected with the antenna.

10. A wireless communication device comprising a housing and the antenna structure of claim 9;

the antenna structure is disposed in the housing.

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