Foldable device and notebook computer

Abstract

The invention provides a foldable device and a notebook computer. A radiation enhancement device comprises a rotating shaft, an upper cover, a base, an antenna and a radiation slot area, the upper cover is rotationally connected with the base through a rotating shaft; a connecting gap is formed between the rotating shaft and the base; the antenna is arranged at the joint of the rotating shaft and the upper cover; a radiation slot area is arranged on the base and at the projection position of the antenna; the radiation slot area comprises a plurality of radiation slots, and the radiation slots are used for collecting and secondarily radiating energy emitted by the antenna; and the radiation slot is communicated with the connecting gap to form a secondary radiation system, so that radiation energy is collected and transferred, mutual interference between the two antennas is effectively reduced, and the isolation degree is improved. Besides, a virtual feeding point is arranged in the radiation slot area and at the edge position of the connecting slot, and the virtual feeding point and the radiation slot area work cooperatively, so that the performance of the antenna is optimized jointly, and the radiation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of antenna communication, and in particular relates to a foldable device and a notebook computer. Background Art

[0002] Nowadays, laptop computer designs are increasingly pursuing beautiful and refined appearance. Aluminum alloy materials have become the mainstream choice for exterior structural parts due to their beauty and durability. However, the use of this material poses a challenge to antenna layout. Due to space constraints, antennas are usually integrated inside the hinge cover of laptops, which not only takes up valuable space inside the hinge cover, but also often results in dual antennas distributed on the left and right sides of the hinge, increasing design complexity.

[0003] In distributed antenna design, despite attempts to reduce interference through spatial distribution, isolation often still fails to reach ideal standards. To improve isolation, designers may introduce multiple antenna branches, but this introduces new problems: the branch structure is complex, not only taking up more space, but also often having to sacrifice the overall performance of the antenna while pursuing isolation effects. Summary of the invention

[0004] The invention provides an antenna design method to improve the isolation between antennas.

[0005] The present invention provides a foldable device, comprising: a rotating shaft, an upper cover, a base, an antenna and a radiation slot area;

[0006] The upper cover and the base are rotatably connected via the rotating shaft; a connecting gap is provided between the rotating shaft and the base;

[0007] The antenna is arranged at the connection between the rotating shaft and the upper cover;

[0008] The radiation slot area is provided on the base at the projection position of the antenna; the radiation slot area includes a plurality of radiation slots, and the radiation slots are used to collect and radiate the energy emitted by the antenna;

[0009] The radiation slot is communicated with the connection gap to form a secondary radiation system.

[0010] Furthermore, the antenna includes a first MIMO antenna and a second MIMO antenna.

[0011] Furthermore, the first MIMO antenna and the second MIMO antenna include high-frequency antenna branches and low-frequency antenna branches;

[0012] One end of the low-frequency antenna branch is connected to one end of the high-frequency antenna branch, and the other end of the high-frequency antenna branch is grounded.

[0013] Furthermore, the radiation slot area includes a low-frequency antenna radiation slot corresponding to the low-frequency antenna branch, the low-frequency antenna radiation slot is connected to one end of the high-frequency antenna radiation slot corresponding to the high-frequency radiation branch, and the other end of the high-frequency antenna radiation slot is connected to the connecting gap through a connecting radiation slot.

[0014] Furthermore, a virtual feeding point is provided at the junction of the connecting radiation slot and the connecting gap.

[0015] Furthermore, the virtual feeding point is located at 1 / 10 of the wavelength of the low-frequency antenna branch.

[0016] Furthermore, the distance between the first MIMO antenna and the second MIMO antenna is 0-13 mm.

[0017] Furthermore, the shape of the radiation slot area is rectangular.

[0018] Furthermore, the radiation slot area adopts a single polarization design.

[0019] The present invention also provides a notebook computer, comprising the foldable device.

[0020] Compared with the prior art, the present invention has at least the following technical effects:

[0021] In this embodiment, a secondary radiation system is formed by combining the radiation slot area relatively set at the edge of the base and the projection position of the antenna module, and the radiation slot is combined with the connecting gap formed between the base and the rotating shaft to collect and transfer the energy radiated by the antenna, effectively reduce the mutual interference between the two antennas, and improve the isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a foldable device in one embodiment of the present invention;

[0023] Figure 2 A diagram showing the positional relationship between the antenna module and the radiation slot area in one embodiment of the present invention;

[0024] Figure 3 The figure is a comparison diagram of the isolation between an antenna module with a radiation slot area and an antenna module without a radiation slot area in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is a description of a foldable device and a notebook computer of the present invention in conjunction with a schematic diagram, wherein a preferred embodiment of the present invention is shown. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation of the present invention.

[0026] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in illustrating the purpose of the embodiments of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figure 1 and Figure 2 , this embodiment provides a foldable device, including: a rotating shaft 14, an upper cover 11, a base 12, an antenna and a radiation slot area;

[0029] Specifically, the upper cover 11 and the base 12 are rotatably connected via the rotating shaft 14; a connecting gap is provided between the rotating shaft 14 and the base 12; the antenna is arranged at the connection between the rotating shaft 14 and the upper cover 11; on the base 12, a radiation slot area is provided at the projection position of the antenna; the radiation slot area includes a plurality of radiation slots, and the radiation slots are used to collect and radiate the energy emitted by the antenna; the radiation slots are communicated with the connecting gap to form a secondary radiation system.

[0030] The antenna in this embodiment is a MIMO (Multiple Input Multiple Output) antenna. In a specific embodiment, the MIMO antenna includes a first MIMO antenna 1 and a second MIMO antenna 2 .

[0031] In a specific embodiment, the first MIMO antenna 1 and the second MIMO antenna 2 are arranged side by side at the connection between the upper cover 11 and the rotating shaft 14 .

[0032] In a MIMO system, when a first MIMO antenna 1 transmits a signal, the electromagnetic wave of the signal may affect an adjacent second MIMO antenna 2 due to a diffraction effect. Diffraction refers to the bending phenomenon of the wave front of an electromagnetic wave when it encounters an obstacle.

[0033] In this embodiment, a first radiation slot area 9 is provided at the projection of the first MIMO antenna, and a second radiation slot area 10 is provided at the projection of the second MIMO antenna. Combining the first radiation slot area 9, the second radiation slot area 10 and the connecting gap 13, a secondary radiation system can be formed, which can collect and transfer the energy radiated by the antenna, thereby optimizing the transmitting and receiving performance of the antenna.

[0034] Specifically, in this embodiment, when the first MIMO antenna 1 transmits a signal, part of the energy will be radiated to the second MIMO antenna 2, thereby causing interference between the two MIMO antennas, and the multiple radiation slots set in the first radiation slot area 9 can capture part of the energy transmitted by the first MIMO antenna 1 and radiate it again, thereby reducing interference to the second MIMO antenna 2. Part of the energy that is not captured by the multiple radiation slots in the first radiation slot area 9 will propagate at the connecting gap 13, and this part of the energy is captured and radiated by the multiple radiation slots set in the second radiation slot area 10, further reducing the interference between the first MIMO antenna 1 and the second MIMO antenna 2.

[0035] It can be seen that this embodiment forms a secondary radiation system by combining the radiation slot area relatively set at the edge of the base 12 and the projection position of the antenna, and the radiation slot is combined with the connecting gap 13 formed between the base 12 and the rotating shaft 14 to collect and transfer the energy radiated by the antenna, effectively reduce the mutual interference between the two antennas, and improve the isolation.

[0036] In this embodiment, the design form of the radiation slot area includes multiple polarization forms such as horizontal polarization, vertical polarization, circular polarization and elliptical polarization. The planned form of the radiation slot area should be as similar as possible to the polarization form of the MIMO antenna.

[0037] In a specific embodiment, the polarization form of the radiation slot area is preferably single polarization forms such as horizontal polarization, vertical polarization, circular polarization and elliptical polarization. The radiation slot set in a single polarization form can collect the near-field radiation energy of the same frequency originally diffracted to another MIMO antenna in the radiation slot as much as possible, and then the collected energy is re-radiated to the far field by the radiation slot with a single polarization. Even if part of the energy will diffract and propagate along the connecting gap 13, a small part of the diffracted energy can still be collected by another single polarization radiation slot area and re-radiated into the free space, thereby improving the energy capture and radiation efficiency of the radiation slot area.

[0038] Furthermore, in order to further match the performance of the radiation slot area with the first MIMO antenna 1 and the second MIMO antenna 2 and improve the energy capture and radiation efficiency of the radiation slot area, the shape design of the radiation slot area should be the same as the projection shape of the first MIMO antenna 1 and the second MIMO antenna 2, and the area difference should also be less than a set threshold range, so that the electromagnetic modes of the radiation slot area and the first MIMO antenna 1 and the second MIMO antenna 2 are consistent, thereby generating a synergistic effect in space. This helps the radiation slot area corresponding to the MIMO antenna to more effectively capture the electromagnetic energy emitted by the MIMO antenna.

[0039] It is understandable that the shape of the antenna can also be circular, triangular, elliptical, etc. Therefore, the shapes of the slot can also be circular, triangular, and elliptical, respectively.

[0040] In addition, in the design of the above isolation device, virtual feeding technology is also introduced, which optimizes the radiation performance of the antenna by creating a non-physical contact feeding point at a specific position of the antenna. This technology uses the coupling principle of electromagnetic fields to improve the radiation efficiency and isolation of the antenna, and uses the sensitivity of the virtual feeding power port to the electric field to improve the radiation efficiency of the antenna. This port is not directly connected to the antenna, but affects the radiation performance of the antenna through electromagnetic coupling.

[0041] In this embodiment, the virtual feeding point 7 is arranged at the connection between the connecting radiation slot and the connecting gap 13. The virtual feeding point 7 works together with the radiation slot area to jointly optimize the performance of the antenna. The radiation slot area is used to capture and re-radiate electromagnetic energy that may interfere with another antenna, while the virtual feeding point 7 is used to improve the radiation efficiency.

[0042] In this embodiment, the first MIMO antenna 1 and the second MIMO antenna 2 include a high-frequency antenna branch 3 and a low-frequency antenna branch 4; one end of the low-frequency antenna branch 4 is connected to one end of the high-frequency antenna branch 3, and the other end of the high-frequency antenna branch 3 is grounded.

[0043] Specifically, the first radiation slot area 9 corresponding to the first MIMO antenna 1 includes a low-frequency antenna radiation slot 5 corresponding to the low-frequency antenna branch 4, and the low-frequency antenna radiation slot 5 is connected to the high-frequency antenna radiation slot 6 corresponding to the high-frequency radiation branch through a first connecting radiation slot 15, and the high-frequency antenna radiation slot 6 is also connected to the connecting gap 13 through a second connecting radiation slot 16.

[0044] Furthermore, the second radiation slot area 10 corresponding to the second MIMO antenna 2 includes a low-frequency antenna radiation slot 5 corresponding to the low-frequency antenna branch 4, and the low-frequency antenna radiation slot 5 is connected to the high-frequency antenna radiation slot 6 corresponding to the high-frequency radiation branch through a first connecting radiation slot 15, and the high-frequency antenna radiation slot 6 is also connected to the connecting gap 13 through a second connecting radiation slot 16.

[0045] It can be understood that the length of the radiation slot can be adjusted according to the isolation between the MIMO antennas, and the lengths of the radiation slots in two radiation slot areas can be set to be different or the same, and no specific limitation is made here.

[0046] In this embodiment, the low-frequency antenna radiation slot 5 and the high-frequency antenna radiation slot 6 are both rectangular. The antenna radiation slot and the connection radiation slot are perpendicular to each other.

[0047] Furthermore, in order to further improve the isolation between antennas, the present embodiment also provides an extension portion 8 at one end of the high-frequency antenna radiation slot 6 corresponding to the second MIMO antenna 2, and the extension portion 8 is located on a side close to the first radiation slot area 9. The setting of the extension portion 8 is beneficial to further improving the collection of radiation energy by the radiation slot area.

[0048] Specifically, the extension portion 8 and the high-frequency antenna radiation slot 6 of the second MIMO antenna 2 are arranged perpendicular to each other.

[0049] In a specific embodiment, the first MIMO antenna 1 and the second MIMO antenna 2 are rectangular in shape, so the radiation slot area corresponding to the MIMO antennas is also rectangular.

[0050] In a specific embodiment, the areas of the first MIMO antenna 1 and the second MIMO antenna 2 are both 27*5 mm, and the areas of the radiation slot regions corresponding to the first MIMO antenna 1 and the second MIMO antenna 2 are 26*5 mm, and the difference between the areas is very small.

[0051] In another specific embodiment, the low-frequency antenna branch 4 of the first MIMO antenna 1 is designed for a 2.4 GHz frequency band, and the high-frequency antenna branch 3 is designed for a 5 GHz frequency band, and the widths of the two antenna branches are both 5 mm.

[0052] The length of the low-frequency antenna radiation slot 5 corresponding to the low-frequency antenna branch 4 of the first MIMO antenna 1 is 20 mm, and its width is the same as that of the low-frequency antenna branch 4 . The length of the high-frequency antenna radiation slot 6 corresponding to the high-frequency antenna branch 3 is 13 mm, and its width is the same as that of the high-frequency antenna branch 3 .

[0053] In another specific embodiment, the low-frequency antenna branch 4 of the second MIMO antenna 2 is designed for the 2.4 GHz frequency band, and the high-frequency antenna branch 3 is designed for the 5 GHz frequency band, and the width of the two antenna branches is 5 mm. The length of the low-frequency antenna radiation slot 5 corresponding to the low-frequency antenna branch 4 of the second MIMO antenna 2 is 21 mm, and the width is the same as the low-frequency antenna branch 4. The length of the high-frequency antenna radiation slot 6 corresponding to the high-frequency antenna branch is 8 mm, and the width is the same as the high-frequency antenna branch 3.

[0054] In another specific embodiment, the virtual feeding point 7 is located at 1 / 10 of the wavelength of the 2.5G low-frequency arm.

[0055] Please refer to Figure 3, using the antenna module disclosed in the above specific embodiment and the parameter design of the radiation slot in the radiation slot area, even if the distance between the first MIMO antenna 1 and the second MIMO antenna 2 is very close, for example, only 13mm apart, the system can also achieve high isolation, reaching more than -30dB, compared with the dual MIMO antenna without a radiation slot area, the isolation can be improved by at least 10db,

[0056] Furthermore, the foldable device disclosed in this embodiment can be applied to foldable devices including but not limited to laptop computers and foldable mobile phones, etc. The specific parameters of the radiation area and the radiation slot can be adjusted according to the actual antenna design.

[0057] In summary, this embodiment collects and radiates the energy emitted by the antenna by means of the radiation slot area relatively arranged at the edge of the base 12 and the projection position of the antenna module, wherein the radiation slot area includes a low-frequency antenna radiation slot 5 and a high-frequency antenna radiation slot 6, and the radiation slot is combined with the connecting gap 13 formed between the base 12 and the rotating shaft 14 to form a secondary radiation system, which collects and transfers the energy radiated by the antenna, effectively reduces the mutual interference between the two antennas, and improves the isolation. In addition, this embodiment also sets a virtual feeding point 7 at the edge of the connecting slot in the radiation slot area, and the virtual feeding point 7 works in conjunction with the radiation slot area to jointly optimize the performance of the antenna and improve the radiation efficiency of the antenna.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A foldable device, characterized in that: include: The hinge, top cover, base, antenna and radiation slot areas; The upper cover and the base are rotatably connected via the rotating shaft; a connecting gap is provided between the rotating shaft and the base; The antenna is arranged at the connection between the rotating shaft and the upper cover; The radiation slot area is provided on the base at the projection position of the antenna; the radiation slot area includes a plurality of radiation slots, and the radiation slots are used to collect and radiate the energy emitted by the antenna; The radiation slot is communicated with the connection gap to form a secondary radiation system.

2. The foldable device according to claim 1, characterized in that: The antenna includes a first MIMO antenna and a second MIMO antenna.

3. The foldable device according to claim 2, characterized in that: The first MIMO antenna and the second MIMO antenna include a high frequency antenna branch and a low frequency antenna branch; One end of the low-frequency antenna branch is connected to one end of the high-frequency antenna branch, and the other end of the high-frequency antenna branch is grounded.

4. The foldable device according to claim 3, characterized in that: The radiation slot area includes a low-frequency antenna radiation slot corresponding to the low-frequency antenna branch, and the low-frequency antenna radiation slot is connected to the high-frequency antenna radiation slot corresponding to the high-frequency radiation branch through a connecting slot at one end, and the high-frequency antenna radiation slot is connected to the connecting gap through a connecting radiation slot.

5. The foldable device according to claim 4, characterized in that: A virtual feeding point is provided at the junction of the connecting radiation slot and the connecting gap.

6. The foldable device according to claim 5, characterized in that: The virtual feeding point is located at 1 / 10 of the wavelength of the low-frequency antenna branch.

7. The foldable device according to claim 2, characterized in that: The distance between the first MIMO antenna and the second MIMO antenna is 0-13 mm.

8. The foldable device according to claim 1, characterized in that: The shape of the radiation slot area is rectangular.

9. The foldable device according to claim 1, wherein: The radiation slot area adopts a single polarization design.

10. A notebook computer, characterized in that: Comprising a foldable device as claimed in any one of claims 1-9.

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