TWM627658U - Antenna device - Google Patents

Abstract

This application discloses an antenna device, which is installed in a casing of an electronic device, and the casing includes a first system ground plane and a second system ground plane. In the antenna device, the dielectric substrate includes first to fifth surfaces. The first metal layer is located on the third surface, the second metal layer is located on the fourth surface, the third metal layer is located on the fifth surface, the fourth metal layer is located on the second surface and is electrically connected to the first metal layer, the second metal layer, and the third metal layer. Three metal layers and the first system ground plane. The first ground portion is located on the long side of the first surface, one long side of the first ground portion is electrically connected to the first metal layer, and two short sides of the first ground portion are electrically connected to the second metal layer and the third metal layer respectively Floor. A radiating portion, a signal source, a feeding portion and a coupling metal branch are arranged on the first surface, a first coupling distance is formed between the feeding portion and the radiating portion, and a first coupling distance is formed between the coupling metal branch and the feeding portion Two coupling spacing.

Description

Antenna device

This case relates to an antenna device.

Without considering the characteristics of the wireless communication module or chip, and under the same use situation, there are generally two main conditions that determine the wireless communication quality and wireless signal transmission speed of the notebook computer. One is the advantages and disadvantages of the antenna characteristics. Antennas with good characteristics can provide longer transmission distance and higher signal coverage, and the other is the system noise generated by high-speed signals. More opportunities to provide better wireless communication quality and transmission speed.

However, as there are more and more types of high-speed signals in the system, and the speed is also getting faster and faster, the accompanying increase of system noise leads to the wireless communication system being susceptible to interference and degrading the communication quality. In order to solve the problem of noise interference, a common practice is to use an EMI noise absorber with a specific frequency to attach to the noise source to reduce the noise brought by the system and prevent the noise radiation from being received by the antenna. . However, the use of electromagnetic wave absorbers may increase the thickness and cost of the notebook computer. Another common practice is to design some mechanical structures around the antenna as metal shields. This method must have a certain distance from the antenna to avoid affecting the characteristics of the antenna. In product design, some space must be added to set these metals. shield. Although the method of metal shielding can reduce the system noise received by the antenna, it also occupies a relatively large space for use. In the case of limited space, it is more difficult to use this method.

The present application provides an antenna device, which is installed in a casing of an electronic device, and the casing includes a first system ground plane and a second system ground plane. The antenna device includes a dielectric substrate, a first metal layer, a second metal layer, a third metal layer, a fourth metal layer, a first grounding part, a radiation part, a signal source, a feeding part and a Coupling metal branches. The dielectric substrate is located in the casing, and the dielectric substrate includes a first surface and a second surface opposite to each other, and a third surface, a fourth surface and a fifth surface located between the first surface and the second surface, wherein the first surface and the second surface are located. The four surfaces are opposite to the fifth surface, and the third surface is adjacent to the fourth surface and the fifth surface. The first metal layer is located on the third surface, the second metal layer is located on the fourth surface and is electrically connected to the first metal layer, the third metal layer is located on the fifth surface and is electrically connected to the first metal layer, and the fourth metal layer It is located on the second surface and is electrically connected to the first metal layer, the second metal layer, the third metal layer and the first system ground plane. The first ground portion is located on the long side of the first surface, one long side of the first ground portion is electrically connected to the first metal layer, and two short sides of the first ground portion are electrically connected to the second metal layer and the third metal layer respectively Floor. The radiation portion is located on the first surface, one end of the radiation portion is electrically connected to the third metal layer, and the other end extends toward the second metal layer. The signal source is connected to the feeding part and the first ground part. The feeding portion is located on the first surface, one end of the feeding portion is electrically connected to the signal source, the other end extends away from the first ground portion, and there is a first coupling distance between the feeding portion and the radiating portion. The coupling metal branch is located on the first surface, one end of the coupling metal branch is electrically connected to the first grounding portion, the other end extends away from the first grounding portion, and there is a first grounding portion between the coupling metal branch and the feeding portion. Two coupling spacing.

To sum up, this case is designed for an antenna device with low noise interference, which can reduce the noise radiated by the antenna received by the system, and effectively maintain good wireless communication quality, so that the antenna device in this case can be used without increasing In the case of antenna size and space, it can simultaneously achieve the low-frequency operating frequency band (2.41-2.480 GHz) and the high-frequency operating frequency band (5.15-7.125 GHz) of the wireless local area network (WLAN) to meet the requirements of WiFi 6E. bandwidth requirements.

Please refer to FIGS. 1 , 2 , 3 and 4 at the same time. An antenna device 10 of the present application is installed in a casing 40 of an electronic device. The casing 40 includes a first system ground plane 42 and a first system ground plane 42 . Two system ground plane 44 . The antenna device 10 includes a dielectric substrate 12 , a first metal layer 14 , a second metal layer 16 , a third metal layer 18 , a fourth metal layer 20 , a first ground portion 22 , and a second ground portion 24 . A third grounding portion 26 , a radiation portion 28 , a signal source 30 , a feeding portion 32 and a coupling metal branch 34 .

In one embodiment, the electronic device is a notebook computer, and the casing 40 is composed of a base cover and a keyboard metal cover, and the keyboard metal cover can be assembled with the base cover, wherein the keyboard metal cover The cover system serves as the first system ground plane 42, and the base cover system serves as the second system ground plane 44, so that the antenna device 10 is installed between the first system ground plane 42 and the second system ground plane 44, but this case is not limited to this .

Please refer to FIG. 1 to FIG. 4 at the same time. In the antenna device 10, the dielectric substrate 12 is located in the casing 40. The dielectric substrate 12 includes a first surface 121 and a second surface 122 that are opposite to each other up and down. A third surface 123, a fourth surface 124 and a fifth surface 125 between the surface 121 and the second surface 122, the fourth surface 124 is opposite to the fifth surface 125, and the third surface 123 is adjacent to the fourth surface 124 and Fifth surface 125 . The first metal layer 14 is located on the third surface 123 and covers the entire third surface 123 . The second metal layer 16 is located on the fourth surface 124 and covers the entire fourth surface 124 , and one side of the second metal layer 16 is electrically connected to the first metal layer 14 . The third metal layer 18 is located on the fifth surface 125 and covers the entire fifth surface 125 , and one side of the third metal layer 18 is electrically connected to the first metal layer 14 . The fourth metal layer 20 is located on the second surface 122 and covers the entire second surface 122 , and the fourth metal layer 20 is electrically connected to the first metal layer 14 , the second metal layer 16 , the third metal layer 18 and the first system ground plane 42 , making the antenna device 10 contact the first system ground plane 42 through the fourth metal layer 20 and be mounted thereon. The first ground portion 22 is located on the long side of the first surface 121 , one long side of the first ground portion 22 is electrically connected to the first metal layer 14 , and two short sides of the first ground portion 22 are respectively electrically connected to the second The metal layer 16 and the third metal layer 18 . The second ground portion 24 is located on the short side of the first surface 121 and adjacent to the fourth surface 124 . The second ground portion 24 is electrically connected to the second metal layer 16 and the first ground portion 22 . The third ground portion 26 is located on the other short side of the first surface 121 and adjacent to the fifth surface 125 , and the third ground portion 26 is electrically connected to the third metal layer 18 and the first ground portion 22 .

The radiation portion 28 is also located on the first surface 121 . One end of the radiation portion 28 is electrically connected to the third ground portion 26 , and the other end extends toward the direction of the second metal layer 16 (the second ground portion 24 ). The end of the other end has a first bending section 281 bent toward the first grounding portion 22 . The signal source 30 is located on the first surface 121 . One end of the signal source 30 is electrically connected to the first grounding portion 22 , and the other end is electrically connected to the feeding portion 32 . The feeding portion 32 is located on the first surface 121 . One end of the feeding portion 32 is electrically connected to the signal source 30 , the other end extends away from the first ground portion 22 , and the other end of the feeding portion 32 faces the second metal layer 16 . A second bending section 321 is bent in the direction of (the second grounding portion 24 ), wherein there is a first coupling distance D1 between the feeding portion 32 and the first bending section 281 of the radiating portion 28 . The coupling metal branch 34 is located on the first surface 121 , one end of the coupling metal branch 34 is electrically connected to the first grounding portion 22 , and the other end extends away from the first grounding portion 22 , and the coupling metal branch 34 and the feeding portion There is a second coupling distance D2 between 32 .

Please refer to FIGS. 1 to 4 at the same time, the first ground portion 22 , the second ground portion 24 and the third ground portion 26 in the antenna device 10 face the second system ground plane 44 and pass through a conductive material 36 The second system ground plane 44 is electrically connected, so that the antenna device 10 is installed between the first system ground plane 42 and the second system ground plane 44 . In one embodiment, the above-mentioned conductive material 36 may be any material capable of conducting current, such as a commonly used conductive foam or a conductive double-sided adhesive.

As shown in FIG. 1 to FIG. 4 , the fourth metal layer 20 is electrically connected to the first metal layer 14 , the second metal layer 16 and the third metal layer 18 respectively to form a “ㄇ”-shaped metal shield, and is connected to the first metal layer 14 , the second metal layer 16 and the third metal layer 18 respectively. A system ground plane 42 is electrically connected so that the three planes (the first metal layer 14 , the second metal layer 16 , and the third metal layer 18 ) are completely overlapped in the vertical direction, which can reduce the amount of noise received by the antenna from the system end. generated noise. Furthermore, in order to achieve better shielding properties, a first ground portion 22 , a second ground portion 24 and a third ground portion 26 are further provided on the first surface 121 of the dielectric substrate 12 , respectively corresponding to the above-mentioned “ㄇ” character. The metal shield of the type is electrically connected, and is connected to the second system ground plane 44 by overlapping the conductive material 36 to the top.

In one embodiment, please refer to FIG. 5 , FIG. 6 and FIG. 7 at the same time, the first surface 121 of the dielectric substrate 12 may further be an inclined surface 126 , and the inclined surface 126 is matched with the shape of the second system ground plane 44 . In this embodiment, the first grounding portion 22 is located at the highest position of the first surface 121 , the second grounding portion 24 , the third grounding portion 26 , the radiation portion 28 , the signal source 30 , the feeding portion 32 and the coupling metal branch 34 are all located on the inclined surface 126 of the first surface 121 . At this time, the inclined plane 441 of the second system ground plane 44 corresponds to the inclined plane 126 of the first surface 121 , so that the antenna device 10 can still conduct the first grounding portion 22 and the second grounding portion 22 and the second grounding portion 10 through the overlap and conduction of the conductive material 36 . The portion 24 and the third ground portion 26 are electrically connected to the second system ground plane 44 through the conductive material 36 . Except for the design of the inclined surface 126 , the other structures and functions are the same as those of the previous embodiment, so reference can be made to the previous description, which will not be repeated here.

In another embodiment, please refer to FIG. 8 , FIG. 9 , FIG. 10 and FIG. 11 simultaneously, the antenna device 10 includes a dielectric substrate 12 , a first metal layer 14 , a second metal layer 16 , and a third metal layer 12 . The metal layer 18 , a fourth metal layer 20 , a first ground portion 22 , a radiation portion 28 , a signal source 30 , a feeding portion 32 and a coupling metal branch 34 . In the antenna device 10 , the dielectric substrate 12 is located in the casing 40 , and the dielectric substrate 12 also includes a first surface 121 , a second surface 122 , a third surface 123 , a fourth surface 124 and a fifth surface 125 . The first metal layer 14 is located on the third surface 123 and covers the entire third surface 123 . The second metal layer 16 is located on the fourth surface 124 and covers the entire fourth surface 124 , and one side of the second metal layer 16 is electrically connected to the first metal layer 14 . The third metal layer 18 is located on the fifth surface 125 and covers the entire fifth surface 125 , and one side of the third metal layer 18 is electrically connected to the first metal layer 14 . The fourth metal layer 20 is located on the second surface 122 and covers the entire second surface 122 , and the fourth metal layer 20 is electrically connected to the first metal layer 14 , the second metal layer 16 , the third metal layer 18 and the first system ground plane 42 , making the antenna device 10 contact the first system ground plane 42 through the fourth metal layer 20 and be mounted thereon. The first ground portion 22 is located on the long side of the first surface 121 , one long side of the first ground portion 22 is electrically connected to the first metal layer 14 , and two short sides of the first ground portion 22 are respectively electrically connected to the second The metal layer 16 and the third metal layer 18 .

The radiation portion 28 is also located on the first surface 121 , one end of the radiation portion 28 is electrically connected to the third metal layer 18 , the other end extends toward the direction of the second metal layer 16 , and the other end of the radiation portion 28 faces the first ground. The portion 22 is bent with a first bent section 281 . The signal source 30 is located on the first surface 121 . One end of the signal source 30 is electrically connected to the first grounding portion 22 , and the other end is electrically connected to the feeding portion 32 . The feeding portion 32 is located on the first surface 121 . One end of the feeding portion 32 is electrically connected to the signal source 30 , and the other end extends away from the first ground portion 22 and has a second bend that is bent in the direction of the second metal layer 16 . There is a first coupling distance D1 between the feeding portion 32 and the first bending portion 281 of the radiating portion 28 . The coupling metal branch 34 is located on the first surface 121 , one end of the coupling metal branch 34 is electrically connected to the first grounding portion 22 , and the other end extends away from the first grounding portion 22 , and the coupling metal branch 34 and the feeding portion There is a second coupling distance D2 between 32 .

As shown in FIGS. 8 to 11 , the first ground portion 22 of the antenna device 10 faces the second system ground plane 44 and is electrically connected to the second system ground plane 44 through a conductive material 36 , so that the antenna device 10 is electrically connected to the second system ground plane 44 . Installed between the first system ground plane 42 and the second system ground plane 44 . Since the fourth metal layer 20 is electrically connected to the first metal layer 14 , the second metal layer 16 and the third metal layer 18 respectively, a “ㄇ”-shaped metal shield can be formed and is electrically connected to the first system ground plane 42 For electrical connection, the first ground portion 22 is further provided on the first surface 121 to be electrically connected to the above-mentioned “ㄇ”-shaped metal shield, and is connected to the top through the conductive material 36 to be electrically connected to the second system ground plane 44 Therefore, in this case, the three planes (the first metal layer 14, the second metal layer 16 and the third metal layer 18) are completely overlapped in the vertical direction, which can reduce the noise generated by the antenna receiving the system end. News.

In one embodiment, please refer to FIG. 12 , FIG. 13 and FIG. 14 at the same time, the first surface 121 of the dielectric substrate 12 may further be an inclined surface 126 , and the inclined surface 126 matches the shape of the second system ground plane 44 . In this embodiment, the first ground portion 22 is located at the highest position of the first surface 121 , and the radiation portion 28 , the signal source 30 , the feeding portion 32 and the coupling metal branch 34 are all located on the inclined surface 126 of the first surface 121 . At this time, the inclined surface 441 of the second system ground plane 44 corresponds to the inclined surface 126 of the first surface 121 , so that the antenna device 10 can still conduct electricity through the overlapping of the conductive material 36 , so that the first grounding portion 22 passes through the conductive material. 36 is electrically connected to the second system ground plane 44 . Except for the design of the inclined surface 126 , the other structures and functions are the same as those of the previous embodiment, so reference can be made to the previous description, which will not be repeated here.

In one embodiment, as shown in FIG. 1 , the first metal layer 14 , the second metal layer 16 , the third metal layer 18 , the fourth metal layer 20 , the first ground portion 22 , the second ground portion 24 , the third The grounding part 26 , the radiation part 28 (including the first bending section 281 ), the feeding part 32 (including the second bending section 321 ), and the coupling metal branch 34 are made of conductive metal materials, such as silver, copper , aluminum, iron or its alloys, etc., but this case is not limited to this.

Please refer to FIG. 1 to FIG. 4 at the same time, taking the antenna device 10 applied in a wireless local area network (WLAN) as an example, the feeding part 32 electrically couples the signal to the radiating part 28 through the first coupling distance D1, and in the low frequency band 2.44 GHz forms a 0.25λ monopole antenna resonance mode to operate in the low frequency band, as shown in Figure 15, and the impedance matching of the low frequency band can be controlled by adjusting the size of the first coupling distance D1. In the high frequency band of 5.25 GHz, a monopole antenna resonance mode with the same 0.25λ is formed by the feeding part 32, as shown in FIG. 16 . In another high frequency band of 7.4 GHz, a high-order resonance mode of 0.75λ formed by the radiation portion 28 has a current zero point on the radiation portion 28, as shown in FIG. 17 . In addition, the design of the coupling metal branch 34 is added at a position away from the second coupling distance D2 of the feeding part 32, so that by adjusting the second coupling distance D2 and the size of the coupling metal branch 34, the impedance matching of the high frequency band can be adjusted, to operate in the high frequency band. Therefore, this case can be applied to the low frequency (2400-2480 MHz) operating frequency band and the high frequency (5150-7150 MHz) operating frequency band.

The antenna device 10 proposed in this case does have good return loss. Please refer to FIG. 1 and FIG. 18 at the same time, the antenna device 10 is used to perform the simulation analysis of S-parameters when the radio frequency signal is transmitted. When the antenna device 10 operates in the low-frequency operating frequency band (2.41-2.48 GHz) and the high-frequency operating frequency band (5.15-7.125 GHz), the S-parameter simulation results of the antenna device 10 are shown in Fig. The return loss (S parameter) of the antenna resonance band in the operating frequency band and the high frequency operating frequency band is greater than 5 dB (S parameter <-5 dB), which proves that there is a good return loss in both the low frequency operating frequency band and the high frequency operating frequency band. It can be effectively applied to the low frequency operating frequency band (2.41-2.480 GHz) and the high-frequency operating frequency band (5.15-7.125 GHz), and also conforms to the current operating frequency band of WiFi 6E.

To sum up, since the current situation of notebook computers and wireless communication devices being interfered by system noise is becoming more and more serious, this application provides a design of an antenna device with low noise interference, which utilizes the vertical metal elements of the antenna device in three different directions. The surface (the first metal layer, the second metal layer and the third metal layer) is completely overlapped with the first system ground plane and the second system ground plane to form a "ㄇ"-shaped metal shield, which can reduce the amount of antenna received by the system. The radiated noise can effectively maintain a good wireless communication quality, and the antenna device in this case can achieve the low-frequency operating frequency band (2.41 ~ 2.480 of the wireless local area network (WLAN) at the same time without increasing the size and space of the antenna. The operating bandwidth of GHz and high-frequency operating bands (5.15-7.125 GHz) meets the bandwidth requirements of WiFi 6E.

The above-mentioned embodiments are only intended to illustrate the technical ideas and features of this case, and their purpose is to enable those familiar with the art to understand the content of this case and implement them accordingly. Equivalent changes or modifications made to the disclosed spirit shall still be covered within the scope of the patent application in this case.

10: Antenna device 12: Dielectric substrate 121: First surface 122: Second Surface 123: Third Surface 124: Fourth Surface 125: Fifth Surface 126: Bevel 14: The first metal layer 16: Second metal layer 18: The third metal layer 20: Fourth metal layer 22: The first ground part 24: Second ground 26: The third ground 28: Radiation Department 281: The first bending segment 30: Signal source 32: Infeed 321: Second bending segment 34: Coupling metal branch 36: Conductive material 40: Shell 42: First system ground plane 44: Second system ground plane 441: Bevel D1: The first coupling distance D2: Second coupling pitch

FIG. 1 is a schematic structural diagram of an antenna device according to an embodiment of the present invention. FIG. 2 is an exploded schematic diagram of a partial structure of an antenna device according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of an antenna device disposed on a casing according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the structure of the antenna device disposed on the casing according to an embodiment of the present invention. FIG. 5 is a schematic structural diagram of an antenna device according to another embodiment of the present invention. FIG. 6 is a schematic structural diagram of an antenna device disposed on a casing according to another embodiment of the present invention. FIG. 7 is a cross-sectional view of the structure of the antenna device disposed on the casing according to another embodiment of the present invention. FIG. 8 is a schematic structural diagram of an antenna device according to still another embodiment of the present application. FIG. 9 is an exploded schematic diagram of a partial structure of an antenna device according to still another embodiment of the present application. FIG. 10 is a schematic structural diagram of an antenna device disposed on a casing according to yet another embodiment of the present application. FIG. 11 is a cross-sectional view of the structure of the antenna device disposed on the casing according to still another embodiment of the present application. FIG. 12 is a schematic structural diagram of an antenna device according to yet another embodiment of the present application. FIG. 13 is a schematic structural diagram of an antenna device disposed on a casing according to yet another embodiment of the present application. FIG. 14 is a cross-sectional view of the structure of the antenna device disposed on the casing according to yet another embodiment of the present application. FIG. 15 is a current distribution diagram of the signal source excited at 2.44 GHz of the antenna device according to an embodiment of the present application. FIG. 16 is a current distribution diagram of the signal source excited at 5.25 GHz of the antenna device according to an embodiment of the present application. FIG. 17 is a current distribution diagram of the signal source excited at 7.4 GHz of the antenna device according to an embodiment of the present invention. FIG. 18 is a schematic diagram of S-parameter simulation generated by the antenna device according to the present application.

10: Antenna device

12: Dielectric substrate

121: First surface

14: The first metal layer

16: Second metal layer

18: The third metal layer

20: Fourth metal layer

22: The first ground part

24: Second ground

26: The third ground

28: Radiation Department

281: The first bending segment

30: Signal source

32: Infeed

321: Second bending segment

34: Coupling metal branch

D1: The first coupling distance

D2: Second coupling pitch

Claims (14)

An antenna device is installed in a casing of an electronic device, the casing includes a first system ground plane and a second system ground plane, the antenna device includes: a dielectric substrate located in the casing, the dielectric substrate includes a first surface and a second surface opposite to each other, and a third surface, a fourth surface and a a fifth surface, the fourth surface is opposite to the fifth surface, and the third surface is adjacent to the fourth surface and the fifth surface; a first metal layer on the third surface; a second metal layer located on the fourth surface and electrically connected to the first metal layer; a third metal layer located on the fifth surface and electrically connected to the first metal layer; a fourth metal layer located on the second surface and electrically connected to the first metal layer, the second metal layer, the third metal layer and the first system ground plane; a first ground portion located on the long side of the first surface, one long side of the first ground portion is electrically connected to the first metal layer, and two short sides of the first ground portion are respectively electrically connected to the first metal layer two metal layers and the third metal layer; a radiation portion located on the first surface, one end of the radiation portion is electrically connected to the third metal layer, and the other end extends toward the second metal layer; a signal source electrically connected to the first ground portion; a feed-in portion located on the first surface, one end of the feed-in portion is electrically connected to the signal source, the other end extends away from the first ground portion, and there is a first a coupling distance; and A coupling metal branch is located on the first surface, one end of the coupling metal branch is electrically connected to the first ground portion, the other end extends away from the first ground portion, and the coupling metal branch is connected to the first ground portion. There is a second coupling distance between the feeding parts. The antenna device of claim 1, wherein the other end of the radiating portion further has a first bending section bent toward the first ground portion, so that the feeding portion and the first bending section have the first coupling pitch. The antenna device of claim 1, wherein the other end of the feeding portion further has a second bending section bent toward the direction of the second metal layer. The antenna device as claimed in claim 1, further comprising a second ground portion located on the short side of the first surface and electrically connected to the second metal layer and the first ground portion. The antenna device as claimed in claim 4, further comprising a third ground portion located on the other short side of the first surface and electrically connected to the third metal layer and the first ground portion, and the radiation portion is One end is electrically connected to the third ground portion. The antenna device of claim 5, wherein the first ground portion, the second ground portion and the third ground portion are electrically connected to the second system ground plane through a conductive material. The antenna device of claim 6, wherein the first surface is an inclined plane to match the shape of the second system ground plane. The antenna device of claim 1, wherein the first ground portion is electrically connected to the second system ground plane through a conductive material. The antenna device of claim 8, wherein the first surface is an inclined plane to match the shape of the second system ground plane. The antenna device of claim 1, wherein the casing further comprises a base cover and a keyboard metal cover, the first system ground plane is the keyboard metal cover, and the second system ground plane is the base cover body. The antenna device of claim 1, wherein the first metal layer covers the entire third surface. The antenna device of claim 1, wherein the second metal layer covers the entire fourth surface. The antenna device of claim 1, wherein the third metal layer covers the entire fifth surface. The antenna device of claim 1, wherein the fourth metal layer covers the entire second surface.

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