CN218602729U

CN218602729U - Antenna device and electronic apparatus

Info

Publication number: CN218602729U
Application number: CN202221939245.7U
Authority: CN
Inventors: 徐成峰
Original assignee: Weifang Goertek Electronics Co Ltd
Current assignee: Weifang Goertek Electronics Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2023-03-10
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses an antenna device, include: a planar element, a reference antenna assembly, a tuning element, and a ground element; wherein the planar element is made of a metal conductor; the reference antenna assembly is arranged at a distance from the planar element along the thickness direction of the planar element; the tuning element is made of a metal conductor, is L-shaped and is provided with a first end part and a second end part which are perpendicular to each other; the reference antenna components and the tuning elements are distributed in sequence and arranged at intervals along the width direction of the plane element; the tuning element is arranged at a distance from the planar element along the thickness direction of the planar element; one end of the grounding element is connected with the plane element, and the other end of the grounding element is connected with the joint of the first end part and the second end part; an electronic device is also provided. The utility model discloses can effectively improve antenna device's bandwidth, improve the radiation direction cover of antenna, ensure that communication is stable.

Description

Antenna device and electronic apparatus

Technical Field

The utility model belongs to the technical field of electronic equipment, especially, relate to an antenna device to and an electronic equipment with antenna device.

Background

In real life, with the development of information technology and the advancement of technology, wireless electronic devices are increasingly entering our lives. For better user experience, the wireless electronic device needs to ensure stable connection during wireless communication. One basis for deciding a stable connection is that the antenna has good directivity to ensure that signals from various directions can be received in wireless communication.

Some wireless electronic devices are relatively bulky and may have more metal structures disposed within the internal cavity. These metal structures may cause the transmitting and receiving capabilities of the antenna to be affected, resulting in an increase in the radiation directivity of the antenna, so that the antenna may stably cover only a limited direction, which is not favorable for stable communication connection of the wireless electronic device, and may reduce the user experience. For example, a large number of electronic chips and other electronic components are integrated in an inner cavity of the head-mounted display device with a virtual reality effect, and are limited by an installation environment, so that the problems of strong directivity and narrow bandwidth of an antenna in the head-mounted display device exist, and the requirement for stable connection of the device is difficult to meet.

Disclosure of Invention

To the wireless electronic equipment who uses head-mounted display device as the representative, because a large amount of electronic chip of internal integration and components and parts lead to the antenna erection environment limited, the antenna appears the problem that the directionality is strong, the bandwidth is narrow, be difficult to satisfy the stable demand of connecting of equipment easily, the utility model discloses a first aspect provides an antenna device.

In some embodiments of the present invention, an antenna device includes: a planar element, a reference antenna assembly, a tuning element, and a ground element; wherein the planar element is made of a metal conductor; the reference antenna assembly is spaced from the planar element in a thickness direction of the planar element; the tuning element is made of a metal conductor, is L-shaped and is provided with a first end part and a second end part which are perpendicular to each other; the reference antenna assemblies and the tuning elements are distributed in sequence and arranged at intervals along the width direction of the plane element; the tuning element is arranged at a distance from the planar element along the thickness direction of the planar element; one end of the grounding element is connected with the plane element, and the other end of the grounding element is connected with the joint of the first end part and the second end part.

In some embodiments of the present invention, the reference antenna assembly comprises two reference antenna elements symmetrically arranged in groups; each of the reference antenna elements is made of a metal conductor and is linear, and the two reference antenna elements are respectively distributed along the extension of the planar element in the direction away from each other.

In some embodiments of the present invention, the antenna device further includes: a reference antenna feed disposed between the two reference antenna elements; the reference antenna feed source is configured to feed an electrical signal from the feed circuit to the reference antenna assembly or to feed a signal received by the reference antenna assembly to the feed circuit; the two reference antenna elements are symmetrically distributed by taking the position of the reference antenna feeding source as a symmetry axis.

In some embodiments of the present invention, the planar element is flat and planar, and the planar element is disposed on a main board of the electronic device or a metal bracket in an inner cavity of the electronic device.

In some embodiments of the present invention, the first end portion is linear, the first end portion is disposed near the reference antenna assembly and extends in a length direction of the planar element, and the first end portion is parallel to the reference antenna assembly.

In some embodiments of the invention, the length of the first end is the same as the length of the reference antenna element.

In some embodiments of the present invention, the second end portion is linear; the second end extends in a direction away from the reference antenna assembly.

In some embodiments of the present invention, the length of the second end is greater than the length of the first end.

In some embodiments of the present invention, the antenna device is configured to transmit and/or receive a wireless signal with a set frequency band of 2.4GHz.

In some embodiments of the invention, the length of the reference antenna element is any value between 25mm and 30mm.

In some embodiments of the invention, a ratio of the length of the second end portion to the length of the reference antenna element is any value between 1.1 and 1.16.

A second aspect of the present invention provides an electronic device, comprising one or more antenna arrangements; the antenna device includes: a planar element, a reference antenna assembly, a tuning element, and a ground element; wherein the planar element is made of a metal conductor; the reference antenna assembly is spaced from the planar element in a thickness direction of the planar element; the tuning element is made of a metal conductor, is L-shaped and is provided with a first end part and a second end part which are perpendicular to each other; the reference antenna assemblies and the tuning elements are distributed in sequence and arranged at intervals along the width direction of the plane element; the tuning element is arranged at a distance from the planar element along the thickness direction of the planar element; one end of the grounding element is connected with the plane element, and the other end of the grounding element is connected with the joint of the first end part and the second end part.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

the reference antenna assembly can be tuned by adding an L-shaped tuning element, the first end portion in the parallel state providing a second resonant mode for the reference antenna assembly to increase bandwidth. Meanwhile, due to the electromagnetic coupling effect, a horizontally polarized electromagnetic signal induced at the first end part and the reference antenna component resonates on the L-shaped end part of the tuning element through the conductor, and a vertically polarized radiation mode is generated at the second end part, so that the radiation resistance of the antenna is improved, and the bandwidth of the antenna is further expanded. Under the resonant working mode of the second end part, the angle radiation signal at the rear side of the planar element is synchronously enhanced due to the diffraction effect caused by the tuning element, and the radiation direction coverage of the antenna is improved. The ground element provides a reference zero potential point further increasing the operating bandwidth of the tuning unit.

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a top view of an embodiment of an antenna device provided by the present invention;

fig. 2 is a left side view of an embodiment of an antenna device provided by the present invention;

fig. 3 is a front view of an embodiment of the antenna device provided by the present invention;

fig. 4 is a frequency gain curve of the rear side of the planar element of the antenna device provided by the present invention;

fig. 5 is a frequency gain curve of the antenna apparatus provided by the present invention to show the front-to-back ratio of the antenna apparatus;

fig. 6 is a radiation pattern of the antenna device provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

To the wireless electronic equipment who uses head-mounted display device as the representative, because a large amount of electronic chip of internal integration and components and parts lead to the antenna installation environment limited, the problem that the antenna appears the directionality strong, the bandwidth is narrow easily, is difficult to satisfy the demand that equipment is stably connected, fig. 1 to fig. 3 show the utility model provides an antenna device's a concrete implementation mode.

The antenna device shown in fig. 1 to 3 is configured to transmit and/or receive a wireless signal of a set frequency band. In some embodiments of the present invention, the set frequency band is 2.4GHz. The antenna device 10 includes a planar element 12, a reference antenna assembly 14, a tuning element 20, and a ground element 26.

The planar element 12 is made of a metal conductor and is flat and planar as a whole. The planar element 12 is configured to provide a ground point for the antenna device 10. Illustratively, the planar element 12 may be made of a metal conductor having good electrical conductivity, such as copper. The planar element 12 may optionally be constructed on a printed circuit board, which may be a motherboard within an electronic device. Alternatively, the planar element 12 may also be constructed on a metal support in the interior cavity of the electronic device.

In the embodiment shown in fig. 1 to 3, the thickness direction of the planar element 12 is defined as the Z-axis direction, one direction orthogonal to the Z-axis direction is defined as the X-axis direction, and a direction orthogonal to both the Z-axis direction and the X-axis direction is defined as the Y-axis direction. For ease of description, the planar element 12 is defined to lie in an X-Y plane defined by an X-axis direction and a Y-axis direction. In the present embodiment, the planar element 12 may be configured in a rectangular planar shape, that is, the length direction of the planar element 12 is the X-axis direction, and the width direction is the Y-axis direction.

The reference antenna assembly 14 is a radiator made of a metal conductor with good performance such as copper. The reference antenna assembly 14 is spaced apart from the planar element 12 by a first predetermined distance D1 (as shown) in the thickness direction (Z-axis direction) of the planar element 12. In an alternative embodiment, planar element 12 is 200mm in length and 50mm in width. In the top view of fig. 1, the reference antenna assembly 14 overlaps the planar element 12, and the center point of the reference antenna assembly 14 coincides with the center point of the planar element 12. In alternative other embodiments, the center point of the reference antenna assembly 14 is located on the centerline of the length direction (X-axis direction) of the planar element 12.

The reference antenna assembly 14 and planar element 12 are preferably arranged in parallel, but it is also permissible for the two to be arranged not to be completely parallel, for example the reference antenna assembly 14 may be tilted by no more than 10 degrees relative to the planar element 12. Taking the reference antenna assembly 14 and planar element 12 arranged in parallel as an example, the first predetermined distance D1 is 12mm.

More specifically, in a preferred embodiment, the reference antenna assembly 14 includes two reference antenna elements 16 arranged symmetrically in groups. Each of the reference antenna elements 16 is made of a metal conductor and has a linear shape, and is respectively distributed along the extension of the planar element 12 in the longitudinal direction (i.e., the X-axis direction) away from each other. When the set frequency band of the antenna device 10 is 2.4GHz, the preferred length of the reference antenna element 16 is 1/4 of the wavelength. The wavelength was found to be 123.1mm, and the 1/4 wavelength was found to be 30.8mm, taking into account the wavelength = speed of light/frequency; further in view of the antenna shortening factor, in the present embodiment, the length of the reference antenna element 16 is any value between 25mm and 30mm, preferably 26mm. In an alternative embodiment, the reference antenna element 16 has a length and a width that satisfy the ratio of 13. Illustratively, the reference antenna element 16 is 26mm long and 2mm wide.

A reference antenna feed 18 is provided between the two reference antenna elements 16. The reference antenna feed 18 is configured to feed electrical signals from the feed circuit to the reference antenna assembly 14 or to feed signals received by the reference antenna assembly 14 to the feed circuit. In terms of hardware configuration, the reference antenna elements 16 are symmetrically distributed with respect to the position of the reference antenna feeding source 18 as a symmetry axis. The feeder circuit may optionally be a coaxial cable, and may further include necessary matching circuits, filtering circuits, and the like. The feeding circuit may be a circuit developed in the prior art, and is not described in detail herein.

The tuning element 20 is arranged on one side of the reference antenna component 14. The tuning element 20 is bent from a metal conductor in an "L" shape, and the tuning element 20 has a first end 22 and a second end 24 perpendicular to each other. As shown in fig. 1, the reference antenna assembly 14 and the tuning element 20 are sequentially spaced apart and spaced apart along the width of the planar element 12 with a second predetermined distance D2 therebetween. The second predetermined distance D2 is in the range of 10mm to 15 mm. Furthermore, as shown in fig. 2 and 3, the tuning element 20 is also spaced apart from the planar element 12 with a third predetermined distance D3 therebetween.

The tuning element 20 and planar element 12 are preferably arranged in parallel, but they may also be arranged not completely in parallel, for example the first end 22 may be inclined at no more than 10 degrees relative to the planar element 12 and the second end 24 may be inclined at no more than 10 degrees relative to the planar element 12. Taking the example of a tuning element 20 and a planar element 12 arranged in parallel, the third predetermined distance D3 is 12mm, i.e. preferably the reference antenna assembly 14 and the tuning element 20 are in the same plane.

As shown in fig. 1 to 3, in the present embodiment, the first end portion 22 of the tuning element 20 is linear, the first end portion 22 is disposed close to the reference antenna assembly 14 and extends in the longitudinal direction of the planar element 12, and the first end portion 22 is parallel to the reference antenna assembly 14 with a second predetermined distance therebetween. The second predetermined distance D2 is in the range of 10mm-15 mm. The length of the first end 22 is the same as the length of the reference antenna element 16, preferably the length of the first end 22 is 26mm.

The second end 24 is also linear, the second end 24 extending away from the reference antenna assembly 14. Since the first end portion 22 and the second end portion 24 are perpendicular to each other, the second end portion 24 extends in the width direction (X-axis direction) of the planar member 12. The second end 24 has a length that is slightly greater than the length of the first end 22, i.e., slightly greater than the length of the reference antenna element 16. More specifically, the ratio of the length of the second end portion 24 to the length of the reference antenna element 16 is any value between 1.1 and 1.16. Preferably, when the length of the first end portion 22 is designed to be 26mm, the length of the second end portion 24 is designed to be 30mm.

The antenna device 10 further comprises a ground element 26, the ground element 26 being a ground post, one end of the ground element 26 being connected to the planar element 12 and the other end being connected to the connection of the first end 22 and the second end 24, i.e. at the break of the tuning element 20, the ground element 26 making the potential at the break 0.

The reference antenna assembly 14 can be tuned by adding an L-shaped tuning element, the parallel first end 22 providing the reference antenna assembly 14 with a second resonant mode to increase bandwidth. At the same time, because of the electromagnetic coupling effect, the horizontally polarized electromagnetic signal induced at the first end portion 22 and the reference antenna assembly 14 resonates on the L-shaped end portion of the tuning element 20 through the conductor, and causes the second end portion 24 to generate a vertically polarized radiation pattern, thereby increasing the radiation resistance of the antenna and further expanding the antenna bandwidth. In the resonant mode of operation of the second end portion 24, the angular radiation signal on the rear side of the planar element 12 (i.e., the side away from the reference antenna assembly 14) is synchronously enhanced by the diffraction effect caused by the tuning element 20, improving the radiation direction coverage of the antenna. The ground element 26 provides a reference zero potential point further increasing the operating bandwidth of the tuning unit.

Fig. 4 to 6 illustrate the performance of the antenna device provided by the present invention, as shown in fig. 4 to 6, the antenna device achieves 2400MHz to 2500MHz operating bandwidth coverage; the front-to-back ratio of the antenna is-15.5 dB, which is improved by 2.7dB compared with the prior art; the intensity of the direction radiation signal at the rear side of the plane element is-6 dB, which is improved by 4dB compared with the prior art.

The planar element, the reference antenna assembly, the tuning element and the grounding element may be held in predetermined design positions in a manner well established in the art, for example, by using an insulating base material of a printed circuit board to hold the planar element, the reference antenna assembly, the tuning element and the grounding element in reasonable wiring positions and to meet the design requirements of the first predetermined distance, the second predetermined distance and the third predetermined distance.

A second aspect of the present invention provides an electronic device, including one or more antenna devices. For a specific structure of the antenna device, please refer to the detailed description of the above embodiments and the explicit descriptions of the drawings in the specification, which are not repeated herein. The electronic equipment provided with the antenna device can achieve the same technical effect. The electronic device may be a head-mounted display device that may implement virtual reality display effects or augmented reality display effects. The number and position of the antenna devices can be designed according to the actual needs of the electronic equipment.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims

1. An antenna device, comprising:

a planar element made of a metal conductor;

a reference antenna assembly spaced from the planar element in a thickness direction of the planar element;

a tuning element made of a metal conductor, the tuning element being L-shaped and having a first end and a second end perpendicular to each other; the reference antenna assembly and the tuning element are distributed and arranged at intervals in sequence along the width direction of the planar element; the tuning element is arranged at a distance from the planar element along the thickness direction of the planar element; and

and one end of the grounding element is connected with the plane element, and the other end of the grounding element is connected with the joint of the first end part and the second end part.

2. The antenna device of claim 1,

the reference antenna assembly comprises a set of two reference antenna elements arranged symmetrically; each reference antenna element is made of a metal conductor and is in a linear shape, and the two reference antenna elements are respectively distributed along the extension of the length direction of the planar element, wherein the two reference antenna elements are mutually deviated.

3. The antenna device of claim 2,

the antenna device further includes:

a reference antenna feed disposed between two reference antenna elements; the reference antenna feed source is configured to feed an electrical signal from the feed circuit to the reference antenna assembly or to feed a signal received by the reference antenna assembly to the feed circuit; the two reference antenna elements are symmetrically distributed by taking the position of the reference antenna feeding source as a symmetry axis.

4. The antenna device of claim 1,

the planar element is flat and planar and is arranged on a mainboard of the electronic equipment or a metal support in an inner cavity of the electronic equipment.

5. The antenna device according to claim 2 or 3,

the first end portion is linear, is disposed adjacent to the reference antenna assembly and extends in a longitudinal direction of the planar element, and is parallel to the reference antenna assembly.

6. The antenna device according to claim 5,

the length of the first end portion is the same as the length of the reference antenna element.

7. The antenna device of claim 6,

the second end is linear; the second end extends in a direction away from the reference antenna assembly.

8. The antenna device according to claim 7,

the second end portion has a length greater than a length of the first end portion.

9. The antenna device of claim 8,

the antenna device is configured to transmit and/or receive wireless signals with a set frequency band of 2.4 GHz; the length of the reference antenna element is any value between 25mm and 30 mm; the ratio of the length of the second end portion to the length of the reference antenna element is any value between 1.1 and 1.16.

10. An electronic device, characterized in that it comprises one or more antenna devices according to any of claims 1 to 9.