CN108075227B

CN108075227B - Electronic device and antenna unit thereof

Info

Publication number: CN108075227B
Application number: CN201710473941.0A
Authority: CN
Inventors: 吴建逸; 卓智弘; 吴正雄; 陈谊; 吴朝旭; 李宜树
Original assignee: Pegatron Corp
Current assignee: Pegatron Corp
Priority date: 2016-11-15
Filing date: 2017-06-21
Publication date: 2020-02-07
Anticipated expiration: 2037-06-21
Also published as: TWI632732B; TW201820698A; CN108075227A

Abstract

The invention discloses an electronic device and an antenna unit thereof. The electronic device includes a main body and an antenna unit. The main body is provided with an accommodating space. The antenna unit is arranged in the accommodating space and comprises a dielectric piece and three metal parts. The dielectric member includes a first face vertically adjacent to the other two faces, a second face opposite to the third face to form a resonant cavity. The first metal part is arranged on the first surface and is provided with a first slot and a feed-in end for transmitting and receiving signals. The second metal part is arranged on the second surface and provided with a second slot between the second metal part and the first metal part. The third metal part is arranged on the third surface, is connected with part of the first metal part and is provided with a third slot between the third metal part and the first metal part. The second and third metal parts are respectively in electrical contact with the main body to be grounded. The signal is fed into the three metal parts through the feed-in end and resonates with the resonant cavity to generate two antenna resonant frequency bands. The electronic device and the antenna unit thereof disclosed by the invention can still keep good antenna performance under the structure of the all-metal shell.

Description

Electronic device and antenna unit thereof

Technical Field

The present disclosure relates to electronic devices, and particularly to an electronic device with a dual-band resonant cavity antenna and an antenna unit thereof.

Background

Nowadays, for products such as notebook computers and tablet computers, a metal casing design is often adopted for aesthetic reasons. However, the electronic device with all-metal body is limited by the metal housing, so that the efficiency and radiation pattern of the antenna inside the electronic device are difficult to be well represented, and the signal transmission quality is affected. Therefore, how to design an antenna with good antenna efficiency in an electronic device with an all-metal body is an important research and development issue.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

In order to improve the antenna efficiency and the signal transceiving quality of an internal antenna of an electronic product with a metal body, an embodiment of the present invention provides an electronic device. The electronic device includes a main body and an antenna unit. The main body is provided with an accommodating space, and the antenna unit is arranged in the accommodating space. The antenna unit includes a dielectric member, a first metal portion, a second metal portion, and a third metal portion. The dielectric part comprises a first face, a second face and a third face, wherein the first face is vertically adjacent to the second face and the third face, and the second face and the third face are positioned on two opposite sides to form a resonant cavity. The first metal part is arranged on the first surface and is provided with a first slot and a feed-in end, and the feed-in end is used for receiving signals. The second metal part is arranged on the second surface, and a second slot is formed between the second metal part and the first metal part. The third metal part is arranged on the third surface and is connected with part of the first metal part. A third slot is formed between the third metal part and the first metal part. The second metal part and the third metal part are respectively in electrical contact with the main body so as to be grounded. The signal is fed into the first metal part, the second metal part and the third metal part through the feed-in end and resonates with the resonant cavity to generate a first antenna resonant frequency band and a second antenna resonant frequency band.

In addition, in another technical embodiment of the present invention, an antenna unit is provided. The antenna unit includes a dielectric member, a first metal portion, a second metal portion, and a third metal portion. The dielectric part comprises a first face, a second face and a third face, wherein the first face is vertically adjacent to the second face and the third face, and the second face and the third face are positioned on two opposite sides to form a resonant cavity. The first metal part is arranged on the first surface and is provided with a first slot and a feed-in end, and the feed-in end is used for receiving signals. The second metal part is arranged on the second surface and is grounded, and a second slot is formed between the second metal part and the first metal part. The third metal part is arranged on the third surface, is grounded and is connected with part of the first metal part, and a third slot is formed between the third metal part and the first metal part. The signal is fed into the first metal part, the second metal part and the third metal part through the feed-in end and resonates with the resonant cavity to generate a first antenna resonant frequency band and a second antenna resonant frequency band.

By the technology disclosed by the invention, even if the electronic device adopts the all-metal body, the influence of the metal body on the internal antenna unit can be greatly reduced, and the antenna efficiency and the signal receiving and transmitting quality can still have good performance.

Drawings

FIG. 1A is a schematic view of an electronic device according to an embodiment of the invention;

FIG. 1B is a schematic cross-sectional view of an electronic device according to an embodiment of the invention;

fig. 2A is a schematic diagram of an antenna unit according to an embodiment of the invention;

fig. 2B is an expanded view of six sides of an antenna unit according to an embodiment of the invention;

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

fig. 3B is an expanded view of six sides of an antenna unit according to an embodiment of the invention;

fig. 4A is a schematic diagram of an antenna unit according to an embodiment of the invention;

fig. 4B is an expanded view of six sides of an antenna unit according to an embodiment of the invention;

FIG. 5A is a graph of standing wave ratio of antenna voltage versus frequency for an antenna unit according to an embodiment of the present invention;

FIG. 5B is a graph of antenna efficiency versus frequency for an antenna unit according to an embodiment of the present invention;

FIG. 6A is a diagram illustrating antenna isolation versus frequency for an electronic device according to an embodiment of the invention;

FIG. 6B is a graph of antenna efficiency versus frequency for an electronic device according to an embodiment of the invention;

fig. 7 is a schematic cross-sectional view of an electronic device according to an embodiment of the invention.

Detailed Description

The following detailed description of the embodiments will be given with reference to the accompanying drawings, but the embodiments are only for explaining the present invention and not for limiting the invention, and the description of the structural operation is not intended to limit the execution sequence thereof, and any structure resulting from the rearrangement of the elements to produce an apparatus having equivalent technical effects is within the scope of the present disclosure.

Furthermore, the drawings are merely schematic illustrations and are not drawn to scale. As used herein, an "electrical connection" or an "electrical coupling" may refer to two or more elements being in physical or indirect electrical contact.

The term (terms) used throughout the specification and claims has the ordinary meaning as commonly understood in each term used in the art, in the disclosure herein, and in the specific context, unless otherwise indicated. Certain terms used to describe the invention are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the invention.

Referring to fig. 1A, fig. 1A is a schematic view of an electronic device 100 according to an embodiment of the invention. The electronic device 100 may be, for example, a notebook computer, a tablet computer, or any electronic product capable of carrying an antenna transceiver, and in this case, the electronic device 100 is exemplified as a notebook computer. In fig. 1A, the electronic device 100 has a length × width × thickness dimension of, for example, 280mm × 200mm × 13mm, and has a display unit 110 and a main body 120 pivotally connected to each other. The display unit 110 is a display screen for displaying an image interface. The main body 120 includes a top case 130, a bottom case 140, and an accommodating space 142. The accommodating space 142 is located between the top case 130 and the bottom case 140. The top housing 130 may be used to mount input device components such as a keyboard. The top case 130 and the bottom case 140 of the main body 120 are electrically connected to the system ground plane for grounding.

The total thickness of the body 120 is, for example, 7.5 mm. The accommodating space 142 may be configured with components such as a motherboard, a hard disk, a sound box, and/or an antenna. The antenna is disposed in the accommodating space 142 adjacent to the pivot joint between the main body 120 and the display unit 110, as shown in two positions 150 on the left and right in fig. 1A. It should be understood that the location 150 is a reserved mounting location for the antenna unit, which may be multiple separate spaces, or may be a single connected space. The number of the positions 150 and the number of the antenna units can be designed according to actual requirements, and the disclosure only uses two positions 150 and two antenna units as an example to simplify the description, and is not intended to limit the invention.

Referring to fig. 1B, fig. 1B is a schematic cross-sectional view of an electronic device 100 according to an embodiment of the invention. Specifically, FIG. 1B shows a cross-section of the electronic device 100 of FIG. 1A along the cross-sectional line A-A'. As shown in fig. 1B, the electronic device 100 further includes a body edge 144, and the body edge 144 is disposed at a position where the main body 120 is pivoted to the display unit 110. Through holes communicating with the receiving space 142 may be dug at the edge 144 of the main body to serve as an outlet of the radiation path of the internal antenna unit, a sound outlet of the audio device, and/or a heat sink of the electronic device 100.

In addition, the antenna unit 160 is disposed at the position 150 and electrically connected to the top case 130 or the bottom case 140 through a conventional conductive cloth. The antenna element 160 is spaced from the body edge 144 of the electronic device 100 by a distance g1, the distance g1 being less than 3.5mm, for example. It should be noted that the same antenna unit 160 or different antenna units may be disposed in each of the positions 150 of the electronic device 100, in this embodiment, the same antenna unit 160 is disposed in both of the positions 150, wherein one antenna unit 160 serves as a main antenna and the other antenna unit 160 serves as an auxiliary antenna.

Please refer to fig. 2A and 2B for the detailed structure of the antenna unit 160. Fig. 2A is a schematic diagram of an antenna unit 160 according to an embodiment of the invention. Specifically, fig. 2A is a schematic diagram of the antenna unit 160 on the right side in fig. 1A as viewed from the direction of the section line B-B'. The length × width × height dimensions of the antenna unit 160 are, for example, 45mm × 14.5mm × 5mm, and it has a dielectric member 162. The dielectric member 162 is a cube, and has six faces, such as a first face P1, a second face P2, a third face P3, a fourth face P4, a fifth face P5, and a sixth face P6. The first plane P1 and the fourth plane P4 are opposite and vertically adjacent to the second plane P2, the third plane P3, the fifth plane P5 and the sixth plane P6, respectively. The second plane P2 is opposite to the third plane P3, and the fifth plane P5 is opposite to the sixth plane P6. Thus, the dielectric member 162 forms a resonant cavity.

Fig. 2B is a six-sided expanded view of the antenna unit 160 of the embodiment of fig. 2A. In fig. 2B, the dielectric member 162 of the antenna unit 160 includes a first metal portion M1, a second metal portion M2, a third metal portion M3, a fourth metal portion M4 and a fifth metal portion M5. First metal portion M1, second metal portion M2, third metal portion M3, fourth metal portion M4, and fifth metal portion M5 are conductive materials such as copper foil. In the electronic device 100, the first metal portion M1 of the antenna unit 160 is disposed facing outward, i.e., facing the body edge 144. It should be understood that, in this embodiment, the electronic device 100 has two antenna units 160, wherein the first metal portions M1 of the two antenna units 160 face the body edge 144. Specifically, the two antenna units 160 of the electronic device 100 are arranged in a mirror-symmetrical manner, for example.

First metal portion M1 is disposed on first plane P1. The first metal portion M1 has a size of 32mm × 4mm, for example. The first metal part M1 is loop-shaped and has a first slot S1. The first slot S1 is between points D1, D2, and has a width w1 of, for example, 2mm and a length w2 of, for example, 25 mm. In addition, a feeding terminal F1 is provided at about the middle of the upper half of the first metal part M1, and the feeding terminal F1 is used to connect the signal positive terminal of the coaxial transmission line (not shown) to couple with the wireless signal generator, and thus perform the transceiving of the antenna signal.

The second metal part M2 is disposed on the second plane P2 and electrically contacts the top case 130 of the main body 120 through the aforementioned conventional conductive cloth to be further grounded. The second metal part M2 substantially spreads over the second plane P2. The second metal portion M2 and the first metal portion M1 have a second slot S2 therebetween, and the second slot S2 is located on the first plane P1. The second slot S2 is between points D3, D4 and has a width w3 of, for example, 1mm and a length w4 of, for example, 32 mm.

The third metal part M3 is disposed on the third face P3 and electrically contacts the bottom case 140 of the main body 120 through the aforementioned conventional conductive cloth to further ground. The third metal part M3 substantially covers the third face P3. Third metal segment M3 is connected to a portion of first metal segment M1. In the figure, a grounding terminal G1 is disposed at a position above the middle of the third metal portion M3, and the grounding terminal G1 is connected to the negative terminal of the coaxial transmission line for coupling to the signal negative terminal of the wireless signal generator and the system ground plane. In addition, a third slot S3 is formed between the third metal part M3 and the first metal part M1, and the third slot S3 is located on the third face P3. The third slot S3 is between points D5 and D6, and has a width w5 of, for example, 1mm and a length w6 of, for example, 12 mm.

The fourth metal portion M4 is disposed on the fourth face P4, and substantially covers the fourth face P4. Fourth metal segment M4 is connected to second metal segment M2, third metal segment M3, and fifth metal segment M5 in the perspective view of fig. 2A. Wherein the fourth metal portion M4, the first metal portion M1, the second metal portion M2 and the third metal portion M3 surround the fourth slot S4. The fourth slot S4 is located in the first plane P1 and the sixth plane P6 and is between points D3 and D7 as shown. The width of the fourth slot S4 is 5mm, and the length w7 is 19.5 mm.

The fifth metal part M5 is disposed on the fifth plane P5, and has a size of 7.5mm × 5mm, for example. Fifth metal portion M5 is connected to second metal portion M2, third metal portion M3, and fourth metal portion M4 in the perspective view of fig. 2A, wherein fifth metal portion M5 and first metal portion M1, second metal portion M2, and third metal portion M3 surround fifth slot S5. The fifth slot S5 is located in the first plane P1 and the fifth plane P5 between points D4 and D8 as shown. The width of the fifth slot S5 is 5mm, and the length w8 is 8 mm.

The second metal portion M2 and the third metal portion M3 attached to the surface of the dielectric element 162 form a resonant cavity, i.e., the dielectric element 162 is substantially a signal resonant cavity. Therefore, a signal is fed into the first metal part M1, the second metal part M2 and the third metal part M3 through the feeding terminal F1 and resonates with the resonant cavity to generate a dual-band antenna resonant frequency band of the first antenna resonant frequency band and the second antenna resonant frequency band. In addition to the configuration of the fourth metal part M4 and the fifth metal part M5, and the capacitive coupling effect of the first slit S1 to the fifth slit S5 between the metal parts, the antenna unit 160 can resonate out a first antenna resonant frequency band, such as Wi-Fi2.4GHz, and a second antenna resonant frequency band, such as Wi-Fi5 GHz.

Specifically, the first antenna resonant frequency band is generated by coupling resonance of the first metal part M1 and the surrounding second, third, fourth and fifth slots S2, S3, S4 and S5, and the sizes (w 3-w 8) of the second, third, fourth and fifth slots S2, S3, S4 and S5 are related to the frequency and impedance matching of the first antenna resonant frequency band. Therefore, by adjusting the sizes/coupling amounts of the second, third, fourth and fifth slots S2, S3, S4 and S5, the antenna characteristics of Wi-Fi2.4GHz can be changed.

The second antenna resonant frequency band is generated by coupling resonance in the form of a slot antenna (slot antenna) of the first metal part M1 with the first slot S1 therein, and the size (w1, w2) of the first slot S1 is related to the frequency and impedance matching of the second antenna resonant frequency band. Therefore, by adjusting the size/coupling of the first slot S1, the Wi-Fi5GHz antenna characteristics may be changed. Further, the antenna unit 160 is radiated through, for example, a heat radiation hole at the body edge 144 facing the first metal part M1 or a sound output hole of an acoustic device to perform transmission and reception of a wireless communication signal.

In another embodiment of the present invention, the antenna unit 160 in the electronic device 100 may further be combined with other electronic components to save the internal space of the electronic device 100, so that the overall appearance can be further reduced. Please refer to fig. 3A, which is a schematic diagram of an antenna unit 360 according to an embodiment of the present invention. The antenna unit 360 has a dielectric member 362 and is divided into a first half H1 and a second half H2 by a center line L1. The second half H2 is substantially the same as the antenna unit 160, i.e., the first metal portion M1 to the fifth metal portion M5 are attached to the surface of the second half H2. Thus, antenna element 360 may be considered to be antenna element 160 extending further out of first half H1. For the detailed structure of the second half H2, the antenna unit 160 is described above.

In FIG. 3A, the first half H1 has a cutout T1, and the cutout T1 can be used to mount electronic components such as a sound box. In this embodiment, a sixth metal portion M6 is laid in the groove T1. Please refer to fig. 3B, which is a six-sided expanded view of the antenna unit 360 according to an embodiment of the present invention. The pattern of the second half H2 (first metal portion M1 to fifth metal portion M5) is the same as that of fig. 2B. It should be noted that the third metal portion M3 of the second half H2 extends from the third face P3 to the first half H1, and the fourth metal portion M4 of the second half H2 extends from the fourth face P4 to the first half H1, as shown in the figure. In addition, the sixth plane P6 of the antenna unit 360 further includes a third minor metal part M31. Third metal segment M31 is connected to third metal segment M3, fourth metal segment M4 and sixth metal segment M6 in the perspective view of fig. 3A.

The sixth metal portion M6 is located between the points D9 and D10, and is electrically connected to the fourth metal portion M4 of the fourth face P4 in the perspective view of fig. 3A, and is electrically connected to the third metal portion M3 of the third face P3 through the third metal portion M31 of the sixth face P6. Generally, the electronic component usually has a metal element or material, and by laying the sixth metal portion M6 inside the cutout T1, the influence of the electronic component mounted in the cutout T1 on the antenna unit 360 can be reduced, so that the antenna efficiency of the antenna unit 360 is improved.

In another embodiment of the present invention, the sixth metal portion M6 may not be laid inside the groove T1 of the antenna unit 360. Please refer to fig. 4A, which is a schematic diagram of an antenna unit 460 according to an embodiment of the present invention. The antenna element 460, together with the antenna element 360, has a dielectric 462 and is divided into a first half H1 and a second half H2 substantially along a center line L1, and the second half H2 is substantially identical to the antenna element 160. In addition, in FIG. 4A, the first half H1 also has a slot T1. In the embodiment of the antenna unit 460, the difference from the antenna unit 360 is that the sixth metal portion M6 is not laid in the groove T1, but a seventh metal portion M7 is laid on the outer side surface of the first half H1.

Fig. 4B is a six-sided expanded view of an antenna unit 460 according to an embodiment of the invention. The pattern of the second half H2 (i.e. first metal portion M1 to fifth metal portion M5) is the same as that of fig. 2B. While the third metal portion M3 of the second half H2 extends to the first half H1 to fill the third face P3 and the fourth metal portion M4 of the second half H2 extends to the first half H1 to fill the fourth face P4, as shown.

Seventh metal portion M7 is disposed on first plane P1 and sixth plane P6 and located in first half H1. The seventh metal portion M7 is between points D11 and D12. In the perspective view of fig. 4A, the seventh metal portion M7 is electrically connected to the third metal portion M3 and the fourth metal portion M4. By laying the seventh metal portion M7 on the first plane P1 and the sixth plane P6 such that the cutout T1 is surrounded among the third metal portion M3, the fourth metal portion M4, and the seventh metal portion M7, the influence of the electronic components mounted in the cutout T1 on the antenna unit 460 can be reduced, and the antenna efficiency of the antenna unit 460 can be improved.

Fig. 5A is a graph of the antenna Voltage Standing Wave Ratio (VSWR) versus frequency for the

antenna units

160, 360, 460 according to an embodiment of the invention. Here, the ordinate unit of fig. 5A is VSWR, and the abscissa unit is frequency (MHz).

Curves

510A, 520A, 530A in fig. 5A are curves of standing wave ratio of antenna voltage versus frequency for the

antenna units

160, 360, 460, respectively. As can be seen in fig. 5A, the VSWR of the

antenna units

160, 360, 460 at, for example, Wi-Fi2.4GHz and Wi-Fi5GHz approaches 1, showing good impedance matching.

Next, fig. 5B is a graph of antenna efficiency versus frequency for the

antenna units

160, 360, 460 according to an embodiment of the invention. Specifically, fig. 5A shows a graph of antenna efficiency versus frequency for

antenna elements

160, 360, 460 when placed adjacent to an electronic component, such as a speaker, that is placed in a cutout T1 of

antenna elements

360, 460. The ordinate of fig. 5A is in antenna efficiency (dB) and the abscissa is in frequency (MHz).

Curves

510B, 520B, 530B in fig. 5B are sequentially plots of antenna efficiency versus frequency for

antenna units

160, 360, 460, respectively. As can be understood from fig. 5B, the

antenna units

360 and 460 are copper-plated inside or outside the respective slots T1, which improves the antenna efficiency to between-4 dB and-5.5 dB compared to the antenna unit 160 without the slot T1 and copper-plated (the sixth metal portion M6 or the seventh metal portion M7).

Fig. 6A is a graph of Isolation (Isolation) versus frequency of two antenna elements 360 in the electronic device 100 according to an embodiment of the invention. In this example, the distance between the two positions 150 of the electronic device 100 is about 60mm, that is, the two antenna units 360 are about 60mm apart from each other. The unit of the ordinate of fig. 6A is isolation (dB) and the unit of the abscissa is frequency (MHz), and the curve 610 shows the isolation between the antenna elements 360 on both sides. As can be seen from the figure, the isolation of the antenna elements 360 on both sides is lower than-10 dB at both low and high frequencies, and has good isolation.

Fig. 6B is a graph of antenna efficiency versus frequency for the two antenna units 360 of the electronic device 100 according to an embodiment of the invention. Where the ordinate of fig. 6B is in antenna efficiency (dB) and the abscissa is in frequency (MHz), and the

curves

610B, 620B represent the antenna efficiency plots for the left antenna element 360 and the right antenna element 360, respectively. In the case where the antenna unit 360 of the present disclosure is practically applied to the electronic device 100, the antenna efficiency of the two antenna units 360 is-4 dB to-5.5 dB at, for example, Wi-Fi2.4GHz, and-4 dB to-7.5 dB at, for example, Wi-Fi5 GHz.

As mentioned above, when the electronic device 100 has two antenna units, the first metal portions M1 of each antenna unit face the body edge 144 and are arranged in a mirror symmetry manner, as shown in fig. 7, which is a schematic cross-sectional view of the electronic device 100 according to an embodiment of the present invention. Specifically, FIG. 7 shows a cross-section of the electronic device 100 of FIG. 1A along the cross-sectional line B-B'. The antenna unit 460 is taken as an example for explanation in this embodiment. As can be seen from the figure, the first metal portions M1 of the two antenna units 460 all face in the same direction (facing the body edge 144), and the two antenna units 460 are mirror-symmetrical to each other with respect to the center line L2 in the electronic device 100.

As described above, the electronic device and the antenna unit thereof disclosed in the embodiments of the present invention realize a technology that can still maintain good antenna performance under a full metal housing structure, and by integrally disposing the antenna unit and part of components of the electronic device, the occupation of the internal space of the electronic device can be reduced, so that the internal space of the electronic device can be more flexibly utilized, and the external appearance volume of the electronic device can be further reduced.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electronic device, comprising:

a main body having an accommodating space; and

the antenna unit, set up in the accommodation space, the antenna unit contains:

a dielectric member comprising a first face, a second face, a third face, a fourth face and a fifth face, wherein the first face is vertically adjacent to the second face and the third face, the second face and the third face are located on opposite sides, the fourth face is vertically adjacent to the second face, the third face and the fifth face, the fourth face and the first face are located on opposite sides, and the fifth face is vertically adjacent to the first face, the second face, the third face and the fourth face to form a resonant cavity;

the first metal part is arranged on the first surface and is provided with a first slot and a feed-in end, and the feed-in end is used for receiving signals;

a second metal part disposed on the second surface, a second slot being formed between the second metal part and the first metal part;

the third metal part is arranged on the third surface and is connected with part of the first metal part, and a third slot is formed between the third metal part and the first metal part;

a fourth metal part disposed on the fourth surface and connected to the second metal part and the third metal part, wherein the fourth metal part, the first metal part, the second metal part and the third metal part surround a fourth slot; and

a fifth metal part disposed on the fifth surface and connected to the second metal part, the third metal part and the fourth metal part, wherein the fifth metal part, the first metal part, the second metal part and the third metal part surround a fifth slot;

the second metal part and the third metal part are respectively in electrical contact with the main body so as to be grounded, and the signal is fed into the first metal part, the second metal part and the third metal part through the feed-in end and resonates with the resonant cavity to generate a first antenna resonant frequency band and a second antenna resonant frequency band.

2. The electronic device of claim 1, wherein the second slot, the third slot, the fourth slot, and the fifth slot are sized relative to a frequency of the first antenna resonant frequency band, and wherein the first slot is sized relative to a frequency of the second antenna resonant frequency band.

3. The electronic device of claim 1, wherein the dielectric further comprises a sixth face vertically adjacent to the first, second, third, and fourth faces, the sixth face and the fifth face being on opposite sides, the second slot being on the first face, the fourth slot being on the first and sixth faces, and the fifth slot being on the first and fifth faces.

4. The electronic device of claim 1, wherein the dielectric member has a first half and a second half, the first metal portion, the second metal portion, the third metal portion, the fourth metal portion and the fifth metal portion are attached to a surface of the second half, and the first half has a cutout for mounting an electronic component.

5. The electronic device of claim 4, wherein the antenna unit further comprises:

and the sixth metal part is arranged on the inner side of the digging groove and is electrically connected with the third metal part and the fourth metal part.

6. The electronic device of claim 4, wherein the dielectric element further comprises a sixth surface vertically adjacent to the first surface, the second surface, the third surface, and the fourth surface, the sixth surface and the fifth surface being on opposite sides, the antenna unit further comprising:

and a seventh metal part disposed on the first surface and the sixth surface, located on the first half, and electrically connected to the third metal part and the fourth metal part.

7. An antenna unit, comprising:

a dielectric member comprising a first face, a second face, a third face, a fourth face and a fifth face, wherein the first face is vertically adjacent to the second face and the third face, and the second face and the third face are located on opposite sides, the fourth face is vertically adjacent to the second face, the third face and the fifth face, the fourth face and the first face are located on opposite sides, and the fifth face is vertically adjacent to the first face, the second face, the third face and the fourth face to form a resonant cavity;

a first metal part disposed on the first surface and having a first slot and a feed-in end, wherein the feed-in end is used for receiving a signal;

the second metal part is arranged on the second surface, is grounded and is provided with a second slot with the first metal part;

the third metal part is arranged on the third surface, is grounded and is connected with the first metal part, and a third slot is formed between the third metal part and the first metal part;

the signal is fed into the first metal part, the second metal part and the third metal part through the feed-in end and resonates with the resonant cavity to generate a first antenna resonant frequency band and a second antenna resonant frequency band.

8. The antenna unit of claim 7, wherein the second, third, fourth and fifth slots are sized relative to the frequency of the first antenna resonant frequency band, and wherein the first slot is sized relative to the frequency of the second antenna resonant frequency band.

9. The antenna unit of claim 7, wherein the dielectric further comprises a sixth face vertically adjacent to the first, second, third, and fourth faces, the sixth face and the fifth face being on opposite sides, the second slot being on the first face, the fourth slot being on the first and sixth faces, and the fifth slot being on the first and fifth faces.

10. The antenna unit of claim 7, wherein the dielectric member has a first half and a second half, the first metal portion, the second metal portion, the third metal portion, the fourth metal portion and the fifth metal portion are attached to a surface of the second half, and the first half has a cutout for mounting an electronic component.

11. The antenna unit of claim 10, further comprising:

12. The antenna unit of claim 10, wherein the dielectric member further comprises a sixth surface vertically adjacent to the first surface, the second surface, the third surface, and the fourth surface, the sixth surface being on opposite sides of the fifth surface, the antenna unit further comprising: