Communication equipment and antenna device thereof

Abstract

The utility model provides a communication device and an antenna device thereof, and the antenna device comprises a metal body which is in a plate shape and forms a heat dissipation body of the antenna device; the antenna comprises a metal body and an antenna unit, the antenna unit is formed on the edge of the metal body, the antenna unit comprises a supporting branch knot, and the metal body is provided with a through groove penetrating through the metal body in the thickness direction of the metal body. The through groove is adjacent to the edge of the metal body and is provided with an opening communicated with the edge of the metal body, so that a supporting branch connected with the metal body is formed on the outer side of the through groove; the radiating body extends from the end part of the supporting branch knot; the feed sheet is connected with the edge of the through groove and is in feed connection with the power supply unit; wherein the antenna unit is isolated from the metal body through the through groove.

Description

Technical Field

[0001] The utility model relates to the field of electronic devices, in particular to a communication device and its antenna device. Background Art

[0002] In the design process of various wireless communication devices, the influence of metal materials such as radiators on antenna performance needs to be considered. And with the improvement of people's demand for the aesthetic appearance of devices, these devices are designed to be thinner, lighter and smaller to varying degrees. As a miniaturized wireless AP product, the in-wall AP (Access Point) is inherently a form designed to beautify the influence of the router in the home space, and has a particularly strong pursuit of thinness and beauty.

[0003] Most in-wall AP products on the market cannot effectively balance heat dissipation and antenna performance during design. Generally, only a small-area radiator is used, resulting in a relatively high heat temperature rise, which affects the product life. If a larger radiator is used, in order to leave the necessary clearance size for the antenna, the product size is often larger or the antenna performance is poor. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a communication device and its antenna device. The antenna unit is formed at the edge of the metal body by slotting, realizing the coexistence of the heat dissipation element and the antenna unit, and taking into account both the heat dissipation performance and the antenna performance.

[0005] An embodiment of the utility model provides an antenna device, including:

[0006] A metal body, which is formed in a plate shape and serves as the heat dissipation body of the antenna device; and

[0007] An antenna unit, which is formed at the edge of the metal body. The antenna unit includes:

[0008] A support stub, the metal body has a through slot that penetrates the metal body in the thickness direction of the metal body. The through slot is adjacent to the edge of the metal body and has an opening communicating with the edge of the metal body, so as to form a support stub connected to the metal body outside the through slot;

[0009] A radiator, which extends from the end of the support stub and does not exceed the edge of the metal body; and

[0010] A feeding patch, which is connected to the edge of the through slot and is fed and connected to the power supply unit;

[0011] Wherein, the antenna unit is isolated from the metal body by the through slot.

[0012] In one embodiment, the extending direction of the radiator is consistent with the edge of the corresponding metal body.

[0013] In one embodiment, the radiator extends within the plane of the metal body; and / or

[0014] The radiator extends within a plane perpendicular to the plane of the metal body.

[0015] In one embodiment, the support stub forms the edge of the metal body, or

[0016] The support stub is perpendicular to the edge of the metal body.

[0017] In one embodiment, the feeding piece includes a feeding spring piece and a grounding spring piece,

[0018] The feeding spring piece and the grounding spring piece are respectively arranged on two sides of the through groove and are in corresponding positions.

[0019] In one embodiment, the feeding spring piece and the grounding spring piece are adjacent to the opening.

[0020] In one embodiment, a plurality of the antenna units are included, and the interval between two adjacent antenna units is greater than or equal to half a wavelength.

[0021] In one embodiment, a first antenna unit and a second antenna unit with the same frequency are included, and the first antenna unit and the second antenna unit are respectively arranged on a pair of mutually perpendicular edges of the metal body.

[0022] In one embodiment, a first antenna unit and a second antenna unit with the same frequency are included, and a third antenna unit with a frequency different from that of the first antenna unit;

[0023] Wherein, the third antenna unit is located between the first antenna unit and the second antenna unit, and the first antenna unit, the second antenna unit, and the third antenna unit are located on the same edge of the metal body.

[0024] Another embodiment of the present utility model further provides a communication device, including:

[0025] A housing having a hollow cavity;

[0026] A circuit board forming a power supply unit;

[0027] The antenna device as described above, and the antenna device is arranged in parallel and spaced apart from the circuit board in the hollow cavity.

[0028] In the example, the entire antenna unit 20 is within the plane range of the metal body 10 without the need for outward extension. Compared with an antenna unit existing as an independent individual, the integration degree and coplanarity degree of the antenna unit and the heat dissipation sheet metal in this solution are higher, and the adaptability to small-space scenarios is better. At the same time, the conformal degree of the antenna unit and the metal body achieved by using slots and bends is good, and the profile is low, which is suitable for environments with narrow spaces and can be widely applied in small electronic products. Description of the Drawings

[0029] The following drawings only schematically illustrate and explain the present utility model and do not limit the scope of the present utility model.

[0030] Figure 1 It is a schematic structural diagram of the antenna device of the present utility model.

[0031] Figure 2 It is a partial schematic diagram of the antenna device of the present utility model.

[0032] Figures 3a to 3c It is a layout schematic diagram of the antenna device of the present utility model.

[0033] Figure 4 It is a schematic structural diagram of the communication device of the present utility model.

[0034] Figure 5 It is a cross-sectional schematic diagram of the communication device of the present utility model. Detailed Embodiments

[0035] In order to have a clearer understanding of the technical features, objectives, and effects of the utility model, the detailed embodiments of the present utility model are now described with reference to the drawings. The same reference numerals in the drawings represent the same parts.

[0036] In this article, "schematic" means "serving as an example, instance, or illustration", and any illustration or embodiment described as "schematic" in this article should not be interpreted as a more preferred or more advantageous technical solution.

[0037] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. Additionally, to make the drawings concise and easy to understand, for components with the same structure or function in some drawings, only one of them is schematically shown, or only one of them is labeled.

[0038] In this article, "upper", "lower", "front", "rear", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than limiting the absolute positions of these relevant parts.

[0039] In this document, "first", "second", etc. are only used for distinguishing from each other, rather than indicating importance, order, and preconditions for each other's existence, etc.

[0040] In this document, "equal", "same", etc. are not strict mathematical and / or geometric restrictions, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc. Unless otherwise specified, the numerical ranges in this document include not only the entire range within its two endpoints, but also several sub-ranges included therein.

[0041] Now, various exemplary embodiments will be described more fully with reference to the accompanying drawings.

[0042] The present utility model provides a communication device and its antenna device. The antenna unit is formed on the edge of the metal body by slotting, realizing the coexistence of the heat dissipation element and the antenna unit, and taking into account both the heat dissipation performance and the antenna performance.

[0043] As Figure 4 shown, the present utility model provides a communication device, which can be specifically implemented as a wall-mounted AP, and includes an antenna device as Figures 1 to 3c shown. The antenna device directly uses the heat dissipation sheet metal structure as the metal body, and directly slots on the metal body to form the antenna unit. The antenna frequency can be common wireless communication frequencies such as 2.4G and 5G.

[0044] Specifically, as Figure 1 shown, an embodiment of the present utility model provides an antenna device, including:

[0045] A metal body 10, the metal body 10 is formed in a plate shape and serves as the heat dissipation body of the antenna device; and

[0046] An antenna unit 20, the antenna unit 20 is formed on the edge of the metal body 10, and the antenna unit 20 includes:

[0047] A support stub 21, the metal body 10 has a through slot 11 that penetrates the metal body 10 in the thickness direction of the metal body 10. The through slot 11 is adjacent to the edge of the metal body 10 and has an opening communicating with the edge of the metal body 10, so as to form a support stub 21 connected to the metal body 10 on the outside of the through slot 11;

[0048] A radiator 22, the radiator 22 extends from the end of the support stub 21 and does not extend beyond the edge of the metal body 10; and

[0049] A feeding sheet 23, the feeding sheet 23 is connected to the edge of the through slot 11 and is fed and connected to the power supply unit;

[0050] Wherein, the antenna unit 20 is isolated from the metal body 10 by the through slot 11.

[0051] In this example, the antenna elements 20 are distributed at the edge of the metal body 10. Specifically, by opening a number of slits 11 in the shape of "one", "L", "Z", etc. adjacent to the edge of the metal body 10, an elastic arm structure is formed outside the slits 11, and the support branches 21 required for the antenna elements are formed by the elastic arm structure. The elastic arm structure is separated from the metal body 10 by the slits 11, and the length of the antenna radiator corresponding to the required operating frequency extends on the support branches 21 to form the radiator 22. One end of the slit 11 is connected to the edge, and the other end is connected to the metal body 10. Therefore, the elastic arm structure can be integrally connected to the metal body 10 to provide overall support for the antenna elements 20. At the same time, the length and shape of the slit 11 constitute the tuning structure of the antenna elements 20, which plays a role in antenna impedance matching. By cooperating the slit 11 with the feeding position and the length of the radiator 22, a well-operating antenna element 20 can be formed. A feeding piece 23 fixed on the PCB (printed circuit board) substrate is arranged on both sides of the slits of each antenna to achieve feeding.

[0052] In this solution, the metal body 10 serves as a heat dissipation sheet metal and is implemented as a thin plate structure. Combined with Figure 5 As shown, the overall thickness of the antenna device can be only 4 mm, thus achieving a lower profile. The working height of the feeding piece is about 2.3 mm, so the cumulative height is 6.3 mm, thus achieving a smaller product structure size design.

[0053] Moreover, in the example, the whole of the antenna elements 20 is within the plane range of the metal body 10 without extending outwards. Compared with the antenna elements existing as independent individuals, the integration degree and coplanarity degree of the antenna elements and the heat dissipation sheet metal in this solution are higher, and the adaptability to small space scenarios is better. At the same time, the conformal degree of the antenna elements and the metal body realized by using the slits and bends is good, and the profile is low, which is suitable for environments with narrow spaces and can be widely applied in small electronic products.

[0054] As Figure 4 and Figure 5 shown, this embodiment provides a communication device, including:

[0055] A housing 1, the housing 1 having a hollow cavity;

[0056] A circuit board 2, the circuit board 2 forming a power supply unit;

[0057] As Figure 1 shown, an antenna device, the antenna device is arranged in the hollow cavity in parallel and at intervals with the circuit board 2, the feeding piece 23 is fixed on the circuit board 2 and extends towards the antenna device to realize feeding connection with both sides of the slits 11 of the antenna device to feed the antenna elements 20.

[0058] As Figure 1 shown, the extending direction of the radiator 22 is consistent with the edge of the corresponding metal body 10. The radiator 22 extends from the end of the self-supporting branch 21 and does not extend beyond the plane range covered by the metal body 10. Preferably, it extends along the edge direction of the metal body 10 corresponding to the supporting branch 21.

[0059] Among them, the radiator 22 can extend within the plane of the metal body 10. Optionally, the radiator 22 extends within a plane perpendicular to the plane of the metal body 10. The extending length of the radiator 22 corresponds to the operating frequency required by the antenna unit 20.

[0060] As Figure 1 shown, based on the different shapes of the slot 11, the supporting branch 21 can be formed as the edge of the metal body 10, or the supporting branch 21 is perpendicular to the edge of the metal body 10.

[0061] Correspondingly, when the supporting branch 21 is formed as the edge of the metal body 10 or parallel to the edge of the metal body 10, the radiator 22 can extend from the outer edge of the supporting branch 21. When the supporting branch 21 is perpendicular to the edge of the metal body 10, the radiator 22 can extend from the end of the supporting branch 21.

[0062] Since the shape of the slot 11 is not necessarily a straight-line structure, therefore, the above-mentioned supporting branch 21 can be formed as the edge of the metal body 10, or the supporting branch 21 is perpendicular to the edge of the metal body 10, which refers to a part of the supporting branch 21, rather than the entire structure.

[0063] Furthermore, each antenna unit 20 can include one or two elastic arms, which is associated with the impedance matching of the antenna unit. For example, Figure 3b in, the antenna unit 20c has two elastic arms, and the antenna unit 20b has one elastic arm.

[0064] Among them, as Figure 2 shown, the feeding piece 23 includes a feeding elastic piece 231 and a grounding elastic piece 232. Among them, the feeding elastic piece 231 and the grounding elastic piece 232 are respectively arranged on both sides of the through slot 11 and are in corresponding positions.

[0065] In each antenna unit 20, a PiFA (Planar Inverted F-shaped Antenna) antenna structure is formed among the feeding elastic piece 231, the grounding elastic piece 232 and the metal body 10.

[0066] This antenna is named so because its shape resembles an inverted English letter "F". It is an efficient and compact antenna solution widely used in fields such as mobile devices, Internet of Things devices, and satellite communications. The basic structure of a PIFA antenna includes a ground plane, a radiation element, a shorting metal strip, and a coaxial feeder. Its resonant frequency is closely related to factors such as the size of the radiation metal sheet and the width of the shorting metal strip.

[0067] The PIFA antenna has a low profile, an omnidirectional radiation pattern, and tunable impedance characteristics, making it very suitable for portable devices. In addition, the size of the PIFA antenna can be smaller than that of traditional half-wavelength antennas because it utilizes the quarter-wavelength resonance principle and achieves this by introducing shorting pins into the antenna structure.

[0068] The feeding spring piece 231 and the grounding spring piece 232 are arranged on the PCB circuit board. The position of the spring pieces is related to the length of the radiator of the antenna and impedance tuning. Therefore, the longest actual radiator of the antenna can be obtained when arranged at the end of the elastic arm, which is beneficial to the antenna efficiency. Therefore, in this example, the antenna spring pieces are all arranged at the end of each elastic arm or the end position of the slot. Therefore, the feeding spring piece 231 and the grounding spring piece 232 are adjacent to the opening of the slot 11.

[0069] When feeding, spring pieces can be mounted on the PCB and directly hard-contact the metal body. It can also be fed by soldering a coaxial cable at both ends of the opening and using an IPEX (brand) connector, etc. IPEX is a type of micro RF connector developed by the Japanese company I-PEX and is used in wireless communication systems. It is also known as a micro coaxial connector, IPX connector, MHF connector, or u.fl connector.

[0070] Each antenna device may include a plurality of antenna units 20. Among them, the antenna units 20 are evenly distributed on the edge of the metal body 10. The plurality of antenna units 20 can be evenly distributed around the metal body 10 or can be concentratedly arranged at a certain position on the metal body 10.

[0071] Generally, the interval between two adjacent co-frequency antenna units 20 is greater than or equal to half a wavelength to meet the basic isolation requirement.

[0072] Optionally, if in a compact space, the distance requirement cannot be met, for example, as Figure 3a shown, including a first antenna unit 20a and a second antenna unit 20b with the same frequency. The first antenna unit 20a and the second antenna unit 20b are respectively arranged on a pair of mutually perpendicular edges of the metal body 10 so that two co-frequency antenna units are orthogonally arranged.

[0073] Optionally, as Figure 3bAs shown, it includes a first antenna unit 20a and a second antenna unit 20b with the same frequency, and a third antenna unit 20c with a frequency different from that of the first antenna unit 20a;

[0074] Among them, the third antenna unit 20c is located between the first antenna unit 20a and the second antenna unit 20b, and the first antenna unit 20a, the second antenna unit 20b, and the third antenna unit 20c are located on the same edge of the metal body 10.

[0075] Based on Figure 3c The example shown, this embodiment may include 5 antenna units, including 2 2.4G antennas and 3 5G antennas. Among them, the 2 2.4G antennas are arranged orthogonally, and the 2 5G antennas are arranged orthogonally. The remaining 1 5G antenna is arranged between the 2 2.4G antennas to improve the isolation between co-frequency antennas and improve the overall performance of the machine.

[0076] In the example, the whole of the antenna unit 20 is within the plane range of the metal body 10 without extending outwards. Compared with the antenna unit existing as an independent individual, the integration degree and coplanarity degree of the antenna unit and the heat dissipation sheet metal in this solution are higher, and the adaptability to small-space scenarios is better. At the same time, the conformal degree of the antenna unit and the metal body achieved by using slots and bends is good, and the profile is low, which is suitable for environments with narrow space and can be widely used in small electronic products.

[0077] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present invention, and are not used to limit the protection scope of the present invention. Any equivalent implementation modes or changes made without departing from the technical spirit of the present invention, such as the combination, division, or repetition of features, shall be included in the protection scope of the present invention.

Claims

1. An antenna device, characterized in that: include: A metal body (10), the metal body (10) being formed in a plate shape and serving as a heat sink for the antenna device; and An antenna unit (20), the antenna unit (20) being formed at an edge of the metal body (10), the antenna unit (20) comprising: A supporting branch (21), wherein the metal body (10) has a through groove (11) penetrating the metal body (10) in the thickness direction of the metal body (10), the through groove (11) being adjacent to an edge of the metal body (10) and having an opening communicating with the edge of the metal body (10), so as to form a supporting branch (21) connected to the metal body (10) on the outside of the through groove (11); a radiator (22), the radiator (22) extending from the end of the supporting branch (21) and not exceeding the edge of the metal body (10); and A power feeding plate (23), the power feeding plate (23) being connected to an edge of the through slot (11) and being connected to a power supply unit for power feeding; The antenna unit (20) is isolated from the metal body (10) by the through slot (11).

2. The antenna device according to claim 1, characterized in that The extension direction of the radiator (22) is consistent with the edge of the corresponding metal body (10).

3. The antenna device according to claim 2, characterized in that The radiator (22) extends within the plane of the metal body (10); and / or The radiator (22) extends in a plane perpendicular to the metal body (10).

4. The antenna device according to claim 2, characterized in that: The supporting branches (21) form the edge of the metal body (10), or The supporting branches (21) are perpendicular to the edge of the metal body (10).

5. The antenna device according to claim 1, characterized in that: The feeding sheet (23) comprises a feeding spring sheet (231) and a grounding spring sheet (232). The feeding spring piece (231) and the grounding spring piece (232) are respectively arranged on two sides of the through slot (11) and have corresponding positions.

6. The antenna device according to claim 5, characterized in that The feeding spring sheet (231) and the grounding spring sheet (232) are adjacent to the opening.

7. The antenna device according to claim 1, characterized in that: It comprises a plurality of antenna units (20), wherein the interval between two adjacent antenna units (20) is greater than or equal to one half wavelength.

8. The antenna device according to claim 1, characterized in that It comprises a first antenna unit (20a) and a second antenna unit (20b) having the same frequency, wherein the first antenna unit (20a) and the second antenna unit (20b) are respectively arranged on a pair of mutually perpendicular edges of the metal body (10).

9. The antenna device according to claim 1, characterized in that: It comprises a first antenna unit (20a) and a second antenna unit (20b) having the same frequency, and a third antenna unit (20c) having a frequency different from that of the first antenna unit (20a); The third antenna unit (20c) is located between the first antenna unit (20a) and the second antenna unit (20b), and the first antenna unit (20a), the second antenna unit (20b) and the third antenna unit (20c) are located on the same edge of the metal body (10).

10. A communication device, characterized in that: include: A shell (1), wherein the shell (1) has a hollow cavity; A circuit board (2), wherein the circuit board (2) forms a power supply unit ； The antenna device according to any one of claims 1 to 9, wherein the antenna device and the circuit board (2) are arranged in parallel and at intervals within the hollow cavity.

Images