A communication device

Abstract

The application provides a communication device, relates to the technical field of antennas, and is used for solving the problem of how to improve the antenna gain without interfering with the antenna modularization. Specifically, the communication device comprises an antenna and a wave dense medium. The wave dense medium is arranged in the transmission direction of the antenna and is spaced apart from the antenna. The dielectric constant of the medium located on the side of the wave dense medium close to the antenna and the dielectric constant of the medium located on the side of the wave dense medium away from the antenna are both smaller than the dielectric constant of the wave dense medium. The thickness D of the wave dense medium from the surface close to the antenna to the surface away from the antenna satisfies: 0.5nλg(1-10%)≤D≤0.5nλg(1+10%), wherein n=1, 2, 3... and λg is the resonant wavelength of the antenna operating frequency band in the wave dense medium. The communication device provided by the application is used for realizing the transmission and reception of electromagnetic wave signals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and particularly relates to a communication device with an antenna. BACKGROUND

[0002] At present, frequency band signals such as Sub-6GHz, millimeter wave (mmWave), terahertz (THz) and the like have different degrees of attenuation in the process of transmission in space. In order to improve the coverage range of a device (a base station or a terminal), the gain of an antenna is generally improved to solve the problem. In order to improve the gain of the antenna, the shape, material or size of the antenna can be optimized. However, the size of the antenna such as mmWave is small, and tends to be modular, and if the shape, material or size of the antenna is changed, the difficulty and cost of manufacturing will be greatly increased, so that the gain of the antenna is difficult to improve. SUMMARY

[0003] Embodiments of the present application provide a communication device, which is used to solve the problem of how to improve the gain of an antenna without interfering with the modularity of the antenna.

[0004] In order to achieve the above-mentioned purpose, embodiments of the present application provide a communication device, which comprises an antenna and a wave dense medium, the wave dense medium is located on the transmitting direction of the antenna and is arranged in a spaced manner with the antenna, the dielectric constant of the medium located on the side of the wave dense medium close to the antenna in the communication device, and the dielectric constant of the medium located on the side of the wave dense medium away from the antenna are both less than the dielectric constant of the wave dense medium, and the thickness D of the wave dense medium from the surface close to the antenna to the surface away from the antenna satisfies: 0.5nλg(1-10%)≤D≤0.5nλg(1+10%), wherein n=1, 2, 3..., and λg is the resonant wavelength of the working frequency band of the antenna in the wave dense medium.

[0005] Since the dielectric constant of the medium located on the side of the wave-dense medium close to the antenna and the dielectric constant of the medium located on the side of the wave-dense medium far from the antenna are both less than the dielectric constant of the wave-dense medium, the dielectric constant of the medium located on the side of the wave-dense medium close to the antenna and the dielectric constant of the medium located on the side of the wave-dense medium far from the antenna are relatively low, and belong to wave-lean medium. When the electromagnetic wave emitted by the antenna enters the wave-dense medium from the wave-lean medium located on the side of the wave-dense medium close to the antenna, the electromagnetic wave experiences the first wave division. Assuming that the transmitted electromagnetic wave is the first transmitted electromagnetic wave, and the reflected electromagnetic wave is the first reflected electromagnetic wave. The first transmitted electromagnetic wave enters the wave-lean medium located on the side of the wave-dense medium far from the antenna from the wave-dense medium, and experiences the second wave division. In the second wave division, the transmitted electromagnetic wave is the second transmitted electromagnetic wave, and the reflected electromagnetic wave is the second reflected electromagnetic wave. The second reflected electromagnetic wave enters the wave-lean medium located on the side of the wave-dense medium close to the antenna from the wave-dense medium in the opposite direction, and the transmitted electromagnetic wave is the third transmitted electromagnetic wave. On this basis, since the thickness D of the wave-dense medium from the surface close to the antenna to the surface far from the antenna satisfies: 0.5nλg(1-10%)≤D≤0.5nλg(1+10%), where n=1, 2, 3, …, and λg is the resonant wavelength of the antenna operating frequency band in the wave-dense medium, the thickness of the wave-dense medium is an integer multiple of half the wavelength of the antenna in the wave-dense medium. The wave-dense medium forms a Fabry-Perot resonator, and the electromagnetic wave reflects with a phase difference of 180° and transmits with a phase difference of 0° from the wave-lean medium to the wave-dense medium. The electromagnetic wave reflects with a phase difference of 0° and transmits with a phase difference of 0° from the wave-dense medium to the wave-lean medium. That is, there is a phase difference of 180° between the first reflected electromagnetic wave and the electromagnetic wave emitted by the antenna, and there is a phase difference of 0° between the electromagnetic wave emitted by the antenna and the first transmitted electromagnetic wave, between the first transmitted electromagnetic wave and the second reflected electromagnetic wave, and between the second reflected electromagnetic wave and the third transmitted electromagnetic wave. Therefore, the phase difference between the first reflected electromagnetic wave and the third transmitted electromagnetic wave is exactly 180°, which shows interference cancellation, and therefore the Fabry-Perot resonator can achieve the effect of increasing transmission and improve the gain of the antenna.

[0006] In a possible implementation, n=1. In this way, the thickness D of the wave-dense medium is small, which can be installed in a communication device with limited space, and can realize the thinness of the communication device.

[0007] In a possible implementation, the thickness D of the wave-dense medium is less than or equal to 2 mm. In this way, it is beneficial to install the wave-dense medium in a communication device with limited space, and can ensure the thinness of the communication device.

[0008] In a possible implementation, the thickness D of the wave-dense medium is also greater than or equal to 0.1 mm. In this way, the structural strength of the wave-dense medium 40 can be ensured, and the installation in the communication device is facilitated.

[0009] In one possible implementation, the thickness D of the diameter medium can be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm.

[0010] In one possible implementation, the dielectric constant DK of the dense medium is greater than or equal to 14 and less than or equal to 40. This way, when n=1 and the antenna is a mmWave band antenna, the antenna's operating frequency band is between 24GHz and 40GHz, and the thickness D of the dense medium is approximately 1mm. This allows for maintaining the structural strength of the dense medium without compromising the thinness of the communication equipment.

[0011] In one possible implementation, the material of the diameter medium is zirconia ceramic. Zirconia ceramic has a dielectric constant DK of 30. When n=1, the thickness D of the diameter medium is about 1mm, which can ensure the structural strength of the diameter medium without affecting the thinness of the communication equipment.

[0012] In one possible implementation, the antenna is separated from the dense medium by an air gap, with the air forming the medium within the communication device located on the antenna side of the dense medium. Air has a low dielectric constant, thus having a smaller impact on the Fabry-Perot effect of the dense medium.

[0013] In one possible implementation, the distance between the antenna and the denser medium is greater than 0 mm and less than 10 mm. This minimizes the impact on the thinness of the communication device, while the denser medium provides a better boost to the antenna gain.

[0014] In one possible implementation, the spacing between the antenna and the denser medium is greater than 0.02 mm and less than 3 mm. This minimizes the impact on the thinness of the communication device, while the denser medium provides a better boost to the antenna gain.

[0015] In one possible implementation, the spacing between the antenna and the denser medium is greater than or equal to 0.5 mm and less than or equal to 1 mm. This minimizes the impact on the thinness of the communication device, while the denser medium provides a better boost to the antenna gain.

[0016] In one possible implementation, the communication device further includes a back cover. An antenna is located inside the back cover, and a dense dielectric medium is located between the antenna and the back cover and disposed on the inner surface of the back cover. The back cover forms the dielectric medium within the communication device located on the side of the dense dielectric medium away from the antenna. Optionally, the back cover can be made of plastic or glass. Plastics and glass have lower dielectric constants, thus having a smaller impact on the Fabry-Perot effect of the dense dielectric medium.

[0017] In a possible implementation, the communication device further comprises a back cover. The antenna is located on the inner side of the back cover, and the wave-dense medium is embedded in the area of the back cover opposite to the antenna. In this way, the thickness of the communication device can be reduced, and the thinness of the communication device is improved.

[0018] In a possible implementation, the hole for embedding the wave-dense medium on the back cover can be a blind hole or a through hole. When the hole for embedding the wave-dense medium on the back cover is a blind hole, the blind hole can penetrate the inner surface of the back cover and not penetrate the outer surface of the back cover, or the blind hole can penetrate the outer surface of the back cover and not penetrate the inner surface of the back cover, which is not limited herein. When the hole for embedding the wave-dense medium on the back cover is a blind hole, and the blind hole penetrates the inner surface of the back cover and not penetrates the outer surface of the back cover, part of the wave-dense medium is located on the inner side of the back cover, and the other part is embedded in the blind hole. When the hole for embedding the wave-dense medium on the back cover is a blind hole, and the blind hole penetrates the outer surface of the back cover and not penetrates the inner surface of the back cover, part of the wave-dense medium is located on the outer side of the back cover, and the other part is embedded in the blind hole.

[0019] In a possible implementation, when the hole for embedding the wave-dense medium on the back cover is a through hole, the surface of the wave-dense medium away from the antenna can be flush with the outer surface of the back cover, or can protrude to the outer side of the back cover. Optionally, the surface of the wave-dense medium away from the antenna is flush with the outer surface of the back cover. In this way, the appearance of the communication device can be improved.

[0020] In a possible implementation, the communication device further comprises a back cover, and the antenna is located on the inner side of the back cover. The wave-dense medium comprises a first part and a second part. The first part is formed by part of the back cover, and the second part is located between the first part and the antenna and is arranged on the inner surface of the first part. In this way, the sum of the thicknesses of the first part and the second part is the thickness of the wave-dense medium, which is also conducive to the thinness of the communication device, and because the second part is arranged on the surface of the first part close to the antenna, the appearance of the communication device is not affected.

[0021] In a possible implementation, the second part can also be located on the side of the first part away from the antenna and arranged on the outer surface of the first part. Alternatively, part of the second part is located between the first part and the antenna and arranged on the inner surface of the first part, and the other part is located on the side of the first part away from the antenna and arranged on the outer surface of the first part.

[0022] In a possible implementation, the first part and the second part are integrally formed. In this way, the complexity of the structure of the communication device can be reduced, and the assembly efficiency is improved.

[0023] In a possible implementation, the communication device further includes a back cover; the antenna is located on the inner side of the back cover, the wave-dense medium is located on the outer side of the back cover, and the wave-dense medium is arranged on the outer surface of the back cover. In this way, the wave-dense medium does not occupy the internal accommodation space of the communication device, and the installation space of other devices in the communication device can be avoided.

[0024] In a possible implementation, the antenna has a first projection on the back cover, and the wave-dense medium has a second projection on the back cover. The area of the second projection is greater than the area of the first projection, and the edge of the second projection is located outside the edge of the first projection, and the edge of the second projection is spaced apart from the edge of the first projection. In this way, the size of the wave-dense medium is larger than the size of the antenna, and the wave-dense medium can cover the antenna, so that the gain of the antenna can be improved as much as possible.

[0025] In a possible implementation, the antenna is a millimeter wave frequency band antenna. Compared with a Sub-6GHz frequency band, a millimeter wave frequency band has characteristics of higher bandwidth, wider connection, and lower delay. However, millimeter wave frequency band signals decay rapidly in space, and therefore it is urgent to improve the gain to improve the coverage range of a communication device (such as a base station or a terminal) in the millimeter wave frequency band. Meanwhile, compared with a terahertz frequency band, the millimeter wave frequency band has the characteristics of low cost, and therefore has the advantage of wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A front structure schematic diagram of a communication device provided for some embodiments of the present application is shown in FIG. 1;

[0027] Figure 2 A back structure schematic diagram of the communication device shown in FIG. 1 is shown in FIG. 2; Figure 1

[0028] A cross-sectional structure schematic diagram of the communication device shown in FIG. 1 along the A-A direction is shown in FIG. 3; Figure 3 Figure 2 A relative position schematic diagram of a middle plate, a back cover, an antenna, and a wave-dense medium in the communication device shown in FIG. 1 is shown in FIG. 4;

[0029] Figure 4 Figure 3 A transmission path schematic diagram of an electromagnetic wave emitted by the antenna in the communication device shown in FIG. 1 in the wave-dense medium is shown in FIG. 5;

[0030] Figure 5 A schematic diagram of a first projection of the antenna on the back cover and a second projection of the wave-dense medium on the back cover in the communication device shown in FIG. 1 is shown in FIG. 6; Figure 4

[0031] Figure 6 Figure 2 Figure 3

[0032] Figure 7 Figures 1-3 ​​​​​​​Input return loss of the antenna when the communication device is not provided with the wave-impedance medium and when the communication device is provided with the wave-impedance medium;

[0033] Figure 8 For Figures 1-3 Antenna patterns at 26 GHz of the communication device when the communication device is not provided with the wave-impedance medium and when the communication device is provided with the wave-impedance medium; wherein, Figure 8 (a) of (a) represents the antenna pattern at 26 GHz of the communication device when the communication device is not provided with the wave-impedance medium; Figure 8 (b) of (b) represents the antenna pattern at 26 GHz of the communication device when the communication device is provided with the wave-impedance medium;

[0034] Figure 9 For Figures 1-3 Antenna patterns at 28 GHz of the communication device when the communication device is not provided with the wave-impedance medium and when the communication device is provided with the wave-impedance medium; wherein, Figure 9 (a) of (a) represents the antenna pattern at 28 GHz of the communication device when the communication device is not provided with the wave-impedance medium; Figure 9 (b) of (b) represents the antenna pattern at 28 GHz of the communication device when the communication device is provided with the wave-impedance medium;

[0035] Figure 10 For Figures 1-3 Antenna pattern at 26 GHz of the communication device when the communication device is provided with the wave-impedance medium and the size of the antenna reference ground plane is optimized;

[0036] Figure 11 For Figures 1-3 Antenna pattern at 28 GHz of the communication device when the communication device is provided with the wave-impedance medium and the size of the antenna reference ground plane is optimized;

[0037] Figure 12 For Figures 1-3 Antenna pattern at 26 GHz of the communication device when the communication device is not provided with the wave-impedance medium but the size of the antenna reference ground plane is optimized;

[0038] Figure 13 For Figures 1-3 Antenna pattern at 28 GHz of the communication device when the communication device is not provided with the wave-impedance medium but the size of the antenna reference ground plane is optimized;

[0039] Figure 14 For

[0040] Figure 15 For

[0041] Figure 16A schematic diagram showing the relative positions of the middle plate, back cover, antenna, and spectral density medium within a communication device provided in some embodiments of this application;

[0042] Figure 17 A schematic diagram showing the relative positions of the middle plate, back cover, antenna, and spectral density medium within a communication device provided in some embodiments of this application;

[0043] Figure 18 This is a schematic diagram of the rear structure of a communication device provided in some embodiments of this application;

[0044] Figure 19 for Figure 18 A schematic diagram of the cross-sectional structure of the communication device shown along the BB direction;

[0045] Figure 20 A schematic diagram showing the relative positions of the inner plate, camera trim, antenna, and spectral density medium in a communication device provided for some embodiments of this application;

[0046] Figure 21 A schematic diagram showing the relative positions of the inner plate, camera trim, antenna, and spectral density medium in a communication device provided for some embodiments of this application;

[0047] Figure 22 This is a schematic diagram of the rear structure of a communication device provided in some embodiments of this application;

[0048] Figure 23 for Figure 22 The diagram shows the structure of the communication device as viewed from direction D1.

[0049] Figure 24 for Figure 22 The diagram shows the structure of the communication device as viewed from direction D2.

[0050] Figure 25 for Figure 22 The diagram shows the structure of the communication device as viewed from direction D3.

[0051] Figure 26 for Figure 22 The diagram shows the structure of the communication device as viewed from direction D4.

[0052] Figure 27 This application provides a schematic diagram showing the relative positions of the antenna, the high-density medium, and the middle plate in a communication device for further embodiments;

[0053] Figure 28 This application provides a schematic diagram showing the relative positions of the antenna, the spectral density medium, and the middle plate in a communication device for some other embodiments. Detailed Implementation

[0054] In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements not only includes those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0055] In order to improve the gain of the antenna without interfering with the antenna modularization, the present application sets a resonator in the transmitting direction of the antenna based on the Fabry-Perot effect (also known as F-P effect), so as to improve the gain of the antenna without changing the shape, material and size of the antenna on the basis of the existing modular antenna, thus without interfering with the initial performance of the modular antenna.

[0056] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, and before the embodiments of the present application are introduced, the application scenarios of the embodiments of the present application are introduced first.

[0057] The present application provides a communication device, which is a kind of communication device with wireless signal transceiving function. Specifically, the communication device can be a portable electronic device or other suitable electronic device. For example, the communication device can be a mobile phone, a base station, a tablet personal computer, a notebook computer, a laptop computer, a personal digital assistant (PDA), a wearable device, and the like. Among them, the wearable device includes but is not limited to a bracelet, a watch, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses or a VR helmet, and the like.

[0058] Please refer to Figures 1-3 , Figure 1 The front structure schematic diagram of the communication device 100 provided by some embodiments of the present application is shown in Figure 2 For Figure 1 The back structure schematic diagram of the communication device 100 shown in Figure 3 For Figure 2 The cross-sectional structure schematic diagram of the communication device 100 along the A-A direction is shown in. The embodiments and the following embodiments are all taken as an example of the communication device 100 being a mobile phone, which cannot be considered as a special limitation to the communication device 100. The communication device 100 includes a screen 10, a back shell 20, a circuit board (not shown in the figure) and an antenna 30.

[0059] For the convenience of the description of the following embodiments, an XYZ coordinate system is established. Specifically, the length direction of the communication device 100 is defined as the Y-axis direction, the width direction is defined as the X-axis direction, and the thickness direction is defined as the Z-axis direction. It can be understood that the coordinate system of the communication device 100 can be flexibly set according to actual needs, and is not specifically limited here.

[0060] The screen 10 is used to display images, videos, etc. The screen 10 includes a light-transmitting cover plate 11 and a display screen 12. The light-transmitting cover plate 11 and the display screen 12 are stacked and fixedly connected. The light-transmitting cover plate 11 is mainly used to protect and prevent dust from entering the display screen 12. The material of the light-transmitting cover plate 11 includes but is not limited to glass. The display screen 12 can adopt a flexible display screen or a rigid display screen. For example, the display screen 12 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, or a liquid crystal display (LCD).

[0061] The back shell 20 is used to protect the internal electronic devices of the communication device 100. The back shell 20 includes a back cover 21 and a frame 22. The material of the back cover 21 includes but is not limited to glass, plastic such as polycarbonate (PC), and ceramic. The back cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the back cover 21 and the light-transmitting cover plate 11, and the frame 22 is fixed to the back cover 21. For example, the frame 22 can be fixedly connected to the back cover 21 by adhesive. The frame 22 can also be an integral structure with the back cover 21, i.e., the frame 22 and the back cover 21 are an integral structure. The light-transmitting cover plate 11 is fixed to the frame 22. In some embodiments, the light-transmitting cover plate 11 can be fixed to the frame 22 by adhesive. The light-transmitting cover plate 11, the back cover 21, and the frame 22 enclose an internal accommodation space of the communication device 100. The internal accommodation space accommodates the display screen 12.

[0062] In some embodiments, the communication device 100 further comprises a middle plate 23. The middle plate 23 is arranged between the display screen 12 and the back cover 21, and the middle plate 23 is fixed to the inner surface of the frame 22. For example, the middle plate 23 can be fixed to the frame 22 by means of glue, or the middle plate 23 and the frame 22 can be formed as an integral structure. The middle plate 23 is made of metal material, and the middle plate 23 can be used as a reference ground for electronic components in the communication device 100.

[0063] The circuit board is arranged in the internal accommodation space of the communication device 100. In some embodiments, the circuit board is arranged between the middle plate 23 and the back cover 21, and the circuit board is fixed to the middle plate 23. The circuit board can be a main circuit board or a sub-circuit board, which is not limited in the present application.

[0064] The antenna 30 is arranged in the internal accommodation space of the communication device 100. In some embodiments, referring to Figure 3 , the antenna 30 is arranged between the middle plate 23 and the back cover 21.

[0065] In some embodiments, the circuit board is provided with a radio frequency circuit, and the antenna 30 is electrically connected to the radio frequency circuit on the circuit board, so as to emit radio frequency signals from the radio frequency circuit to the external space in the form of electromagnetic waves, so as to realize signal emission; or receive electromagnetic waves from the external space, and convert the electromagnetic waves into radio frequency signals and transmit the radio frequency signals to the radio frequency circuit, so as to realize signal reception.

[0066] The antenna 30 can be a directional antenna or an omnidirectional antenna. In some embodiments, referring to Figure 3 , the antenna 30 can emit signals to the side of the back cover 21 away from the screen 10. On this basis, the antenna 30 can also be used to receive electromagnetic wave signals from the side of the back cover 21 away from the screen 10. In other embodiments, the antenna 30 can also emit signals to the side of the frame 22 away from the internal accommodation space of the communication device 100, or to the side of the screen 10 away from the back cover 21. The present embodiment is described by taking the antenna 30 which can emit signals to the side of the back cover 21 away from the screen 10 as an example, which cannot be considered as a special limitation to the present application.

[0067] It should be noted that the antenna 30 can also emit signals to other sides while emitting signals to the side of the back cover 21 away from the screen 10, such as emitting signals to the side of the frame 22 away from the internal accommodation space of the communication device 100, or emitting signals to the side of the screen 10 away from the back cover 21, which is not limited herein.

[0068] The antenna 30 includes, but is not limited to, a Sub-6GHz frequency band antenna, a millimeter wave (mmWave) frequency band antenna, and a terahertz (THz) frequency band antenna. In some embodiments, the antenna 30 is a mmWave frequency band antenna. As one of the frequency bands of 5G mobile communication, the mmWave frequency band has higher bandwidth, wider connection, and lower latency than the Sub-6GHz frequency band. However, the mmWave frequency band signal decays rapidly in space, and therefore it is urgent to improve the gain to improve the coverage of the communication device (such as a base station or a terminal) of the mmWave frequency band. Meanwhile, compared with the THz frequency band, the mmWave frequency band has the characteristics of low cost, and therefore has the advantage of wide application range. Specifically, when the antenna 30 is a mmWave frequency band antenna, the operating frequency band of the antenna 30 can be the n257 frequency band (26.5-29.5 GHz), the n258 frequency band (24.25-27.5 GHz), or the n260 frequency band (37-40 GHz), which is not limited herein.

[0069] In order to improve the production efficiency of the communication device, the antenna 30 can be provided as a module. In this way, it is convenient to manage and improve the production efficiency of the communication device containing the antenna 30. However, in this way, it is not convenient to improve the gain of the antenna 30 by changing the shape, material, or size of the antenna 30.

[0070] On the basis of the above, in order to improve the gain of the antenna 30 without interfering with the modularization of the antenna 30, please refer to Figure 2 and Figure 3 The communication device further includes a wave density medium 40.

[0071] The wave density medium 40 is a structure for improving the gain of the antenna 30. In some embodiments, please refer to Figure 3 The wave density medium 40 is in the shape of a rectangular sheet, and in other embodiments, the wave density medium 40 can also be in the shape of a circular sheet, an elliptical sheet, a triangular sheet, or a polygonal sheet, etc.

[0072] The wave density medium 40 is located in the transmission direction of the antenna 30, and the wave density medium 40 is spaced apart from the antenna 30. Specifically, the wave density medium 40 can be located between the antenna 30 and the back cover 21, can be arranged in the area of the back cover 21 opposite to the antenna 30, or can be arranged on the side of the back cover 21 away from the antenna 30. In some embodiments, please continue to refer to Figure 3The high-density dielectric 40 is located between the antenna 30 and the back cover 21, and is disposed on the inner surface of the back cover 21. The inner surface of the back cover 21 refers to the surface of the back cover 21 facing the internal accommodating space of the communication device 100, that is, the surface of the back cover 21 closest to the screen 10. Specifically, the high-density dielectric 40 can be adhesively bonded to the inner surface of the back cover 21, or it can be directly molded onto the inner surface of the back cover 21 using the back cover 21 as a base; this embodiment does not specifically limit this.

[0073] The density medium 40 and the antenna 30 can be separated by a solid medium, by air, or by at least one layer of solid medium and at least one layer of air; no specific limitation is made here. In some embodiments, please refer to... Figure 4 , Figure 4 for Figure 3 The diagram shows the relative positions of the inner plate 23, back cover 21, antenna 30, and high-density medium 40 within the communication device 100. The high-density medium 40 and the antenna 30 are separated by air. This structure is simple, and air is inexpensive and easy to implement.

[0074] Within the communication device 100, the dielectric constant (DK, also known as the dielectric constant) of the medium located on the side of the dense medium 40 closer to the antenna 30, and the DK value of the medium located on the side of the dense medium 40 farther from the antenna 30, are both less than the DK value of the dense medium 40. Specifically, the medium located on the side of the dense medium 40 closer to the antenna 30 refers to the medium located on the side of the dense medium 40 closest to the antenna 30 and adjacent to the dense medium 40. Similarly, the medium located on the side of the dense medium 40 farther from the antenna 30 refers to the medium located on the side of the dense medium 40 farther from the antenna 30 and adjacent to the dense medium 40. For an example, please refer to [link to example]. Figure 4 The dielectric material on the side of the denser medium 40 closer to the antenna 30 is air, while the dielectric material on the side of the denser medium 40 farther from the antenna 30 is the back cover 21. That is, the dielectric constant (DK) of both air and the back cover 21 is less than that of the denser medium 40. Based on this, the material of the back cover 21 can be chosen to be plastic or glass, which have a lower DK value. Thus, compared to the denser medium 40, the dielectric material on the side of the denser medium 40 closer to the antenna 30 and the dielectric material on the side of the denser medium 40 farther from the antenna 30 have lower dielectric constants, classifying them as less dense dielectrics.

[0075] Please see Figure 5 , Figure 5 for Figure 4The electromagnetic wave emitted by the antenna 30 in the communication device 100 shown in the transmission path schematic diagram of the wave-dense medium 40. The electromagnetic wave a emitted by the antenna 30 enters the wave-dense medium 40 from the wave-lean medium located on the side of the wave-dense medium 40 close to the antenna 30, undergoes the first wave separation, and the transmitted electromagnetic wave is the first transmitted electromagnetic wave b, and the reflected electromagnetic wave is the first reflected electromagnetic wave c; the first transmitted electromagnetic wave b passes through the wave-dense medium 40 and enters the wave-lean medium located on the side of the wave-dense medium 40 away from the antenna 30, undergoes the second wave separation, and the transmitted electromagnetic wave is the second transmitted electromagnetic wave d, and the reflected electromagnetic wave is the second reflected electromagnetic wave e; the second reflected electromagnetic wave e reverses through the wave-dense medium 40 and enters the wave-lean medium located on the side of the wave-dense medium 40 close to the antenna 30, and the transmitted electromagnetic wave is the third transmitted electromagnetic wave f.

[0076] On the basis of the above-mentioned embodiments, the thickness D of the wave-dense medium 40 from the surface close to the antenna 30 to the surface away from the antenna 30 satisfies: 0.5nλg(1-10%)≤D≤0.5nλg(1+10%). Wherein n=1, 2, 3, …, λg is the resonant wavelength of the antenna 30 operating frequency band in the wave-dense medium 40.

[0077] Wherein, λ0 is the resonant wavelength of the antenna 30 operating frequency band in vacuum, λ0=C0 / F, C0 is the transmission speed of electromagnetic wave in vacuum, C0=3×10^8 m / s. F is the operating frequency band of the antenna 30, F represents a frequency range, such as the operating frequency band of the antenna 30 is n257 frequency band, then F is 26.5GHz-29.5GHz. On this basis, λ0 is also a wavelength range, specifically the upper limit of the C0 / F frequency range-the lower limit of the C0 / F frequency range. DK is the dielectric constant of the wave-dense medium 40, and the DK value of the wave-dense medium 40 of different materials is different. Therefore, λg is also a wavelength range. As can be seen, the thickness D satisfies the condition: 0.5nλg(1-10%)≤D≤0.5nλg(1+10%), that is, the thickness D satisfies: 0.5nλg1(1-10%)≤D≤0.5nλg2(1+10%), wherein λg1 is the resonant wavelength of the upper limit frequency in the operating frequency band of the antenna 30 in the wave-dense medium 40, and λg2 is the resonant wavelength of the lower limit frequency in the operating frequency band of the antenna 30 in the wave-dense medium 40.

[0078] In this way, the thickness D of the wave-dense medium 40 is an integer multiple of half the wavelength of the antenna 30 in the wave-dense medium 40, the wave-dense medium 40 forms a Fabry-Perot resonator, and the electromagnetic wave is reflected with a phase difference of 180° and transmitted with a phase difference of 0° from the wave-dense medium to the wave-dense medium; and the electromagnetic wave is reflected with a phase difference of 0° and transmitted with a phase difference of 0° from the wave-dense medium to the wave-dense medium. That is, there is a phase difference of 180° between the first reflected electromagnetic wave c and the electromagnetic wave a, and there is a phase difference of 0° between the electromagnetic wave a and the first transmitted electromagnetic wave b, between the first transmitted electromagnetic wave b and the second reflected electromagnetic wave e, and between the second reflected electromagnetic wave e and the third transmitted electromagnetic wave f, so that Figure 5 The phase difference between the first reflected electromagnetic wave b and the third transmitted electromagnetic wave f is exactly 180°, which is represented by interference cancellation, so that the Fabry-Perot resonator can achieve the effect of increasing transmission and can improve the gain of the antenna 30.

[0079] In some embodiments, n = 1. In this way, the thickness D of the wave-dense medium 40 is small, which can be installed in a communication device with limited space, and can realize the thinness of the communication device.

[0080] In some embodiments, the thickness D of the wave-dense medium 40 can be less than or equal to 2 mm. In this way, it is beneficial to install the wave-dense medium 40 in a communication device with limited space, and can ensure the thinness of the communication device. On this basis, the thickness D of the wave-dense medium 40 can also be greater than or equal to 0.1 mm. In this way, the structural strength of the wave-dense medium 40 can be ensured without affecting the thinness of the communication device, and the installation in the communication device is facilitated. Specifically, the thickness D of the wave-dense medium 40 can be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm.

[0081] In order to achieve the above purpose, when the antenna 30 is a mmWave frequency band (such as n257 frequency band: 26.5-29.5 GHz; n258 frequency band: 24.25-27.5 GHz; n260 frequency band 37-40 GHz) antenna, the DK value of the wave-dense medium 40 can be greater than or equal to 14 and less than or equal to 40. In this way, when n = 1 and the antenna 30 is a mmWave frequency band antenna, the working frequency band of the antenna 30 is between 24 GHz and 40 GHz, and the thickness D of the wave-dense medium 40 is about 1 mm. The structural strength of the wave-dense medium 40 can be ensured without affecting the thinness of the communication device.

[0082] In some embodiments, the material of the wave dense medium 40 includes, but is not limited to, zirconia ceramic and alumina ceramic. The dielectric constant DK of the zirconia ceramic and the alumina ceramic can reach 26-35, and when n = 1, the thickness D of the wave dense medium 40 is about 1 mm, which can ensure the structural strength of the wave dense medium 40 while not affecting the thinness of the communication device.

[0083] In some embodiments, referring to Figure 4 , the spacing between the wave dense medium 40 and the antenna 30 (i.e., the height h of the air gap) is greater than 0 mm and less than 10 mm. In this way, the thinness of the communication device 100 is less affected, and the wave dense medium 40 has a better effect on the gain improvement of the antenna 30. On this basis, further optionally, the height h is greater than 0.02 mm and less than 3 mm. In this way, the thinness of the communication device 100 is less affected, and the wave dense medium 40 has a better effect on the gain improvement of the antenna 30. Further optionally, the height h is greater than or equal to 0.5 mm and less than or equal to 1 mm. In this way, the thinness of the communication device 100 is less affected, and the wave dense medium 40 has a better effect on the gain improvement of the antenna 30.

[0084] In some embodiments, the orthographic projection of the antenna 30 on the back cover 21 is a first projection, the orthographic projection of the wave dense medium 40 on the back cover 21 is a second projection, and the first projection and the second projection overlap. In this way, the wave dense medium 40 is located in the emission direction of the antenna 30 and faces the antenna 30, which can improve the gain of the antenna 30. Wherein, the first projection and the second projection overlap means that part of the first projection overlaps part of the second projection; or the whole of the first projection overlaps part of the second projection; or part of the first projection overlaps the whole of the second projection; or the whole of the first projection overlaps the whole of the second projection.

[0085] In some embodiments, the area of the second projection is greater than the area of the first projection, and the edge of the second projection is located outside the edge of the first projection, and the edge of the second projection is spaced apart from the edge of the first projection.

[0086] For example, referring to Figures 1-3 , the antenna 30 is in the shape of a rectangular plate, and the wave dense medium 40 is in the shape of a rectangular sheet, referring to Figure 6 , Figure 6 , Figure 2 , and Figure 3The schematic diagram of the antenna 30 in the communication device 100 shown in FIG. 1 in the orthographic projection (i.e., the first projection O1) of the back cover 21 and the orthographic projection (i.e., the second projection O2) of the wave-impedance medium 40 in the back cover 21. The first projection O1 and the second projection O2 are both rectangular. The length direction of the first projection O1 is consistent with the length direction of the second projection O2. The width direction of the first projection O1 is consistent with the width direction of the second projection O2. The first projection O1 is located in the second projection O2. The length L1 of the first projection O1 is less than the length L2 of the second projection O2. The width W1 of the first projection O1 is less than the width W2 of the second projection O2. The edge C1 of the first projection O1 is spaced apart from the edge C2 of the second projection O2. In this way, the size of the wave-impedance medium 40 exceeds the size of the antenna 30. The wave-impedance medium 40 can cover the antenna 30 and can as much as possible improve the gain of the antenna 30.

[0087] According to the above description, in order to verify the effect of the wave-impedance medium 40 on the gain of the antenna 30, please refer to Figure 7 , Figure 7 for Figures 1-3 The input return loss S11 of the antenna 30 when the communication device 100 shown in FIG. 1 is not provided with the wave-impedance medium 40 and is provided with the wave-impedance medium 40. Specifically, S11_no F-P represents the input return loss of the antenna 30 when the communication device 100 is not provided with the wave-impedance medium 40. S11_0.25λg represents the input return loss of the antenna 30 when the communication device 100 is provided with the wave-impedance medium 40 and the thickness of the wave-impedance medium 40 is 0.25λg. S11_0.5λg represents the input return loss of the antenna 30 when the communication device 100 is provided with the wave-impedance medium 40 and the thickness of the wave-impedance medium 40 is 0.5λg. S11_0.75λg represents the input return loss of the antenna 30 when the communication device 100 is provided with the wave-impedance medium 40 and the thickness of the wave-impedance medium 40 is 0.75λg. It can be known from Figure 5 that when the thickness of the wave-impedance medium 40 deviates from 0.5λg, the S11 of the antenna 30 deteriorates obviously. When the thickness of the wave-impedance medium 40 approaches 0.5λg, although the bandwidth is narrowed, the S11 at the resonance frequency point can be guaranteed to be <-10dB. It can be illustrated that the wave-impedance medium 40 has the wave-transmitting effect and can improve the gain of the antenna 30.

[0088] Please refer to Figure 8 , Figure 8 for Figures 1-3 The directional diagram of the antenna 30 at 26GHz when the communication device 100 shown in FIG. 1 is not provided with the wave-impedance medium 40 and is provided with the wave-impedance medium 40. Specifically, Figure 8 (a) in FIG. 26 represents the directional diagram of the antenna 30 at 26GHz when the communication device 100 is not provided with the wave-impedance medium 40. Figure 8(b) in the figure represents the radiation pattern of antenna 30 at 26 GHz when a dense medium 40 is provided, wherein the thickness of the dense medium 40 is close to 0.5λg. Figure 8 In (a) of the diagram, when the diametrically opposed medium 40 is not set, the gain of the antenna 30 is 3.6 dBi. Figure 8 In (b) of the diagram, when the dense medium 40 is provided, the gain of the antenna 30 is 7.8 dBi, which is an increase of about 4.2 dBi.

[0089] Please see Figure 9 , Figure 9 for Figures 1-3 The radiation patterns of antenna 30 at 28 GHz are shown for the communication device 100 with and without the high-density medium 40. Specifically, Figure 9 (a) in the diagram represents the radiation pattern of antenna 30 at 28 GHz when the high-density medium 40 is not present. Figure 9 (b) in the diagram represents the radiation pattern of antenna 30 at 28 GHz when a dense medium 40 is provided, wherein the thickness of the dense medium 40 is approximately 0.5λg. Figure 9 In (a) of the diagram, when the spectral density medium 40 is not set, the gain of the antenna 30 is 3.7 dBi. Figure 8 In (b) of the diagram, when the dense medium 40 is provided, the gain of the antenna 30 is 8.1 dBi, which is an increase of about 4.4 dBi.

[0090] because Figures 1-3 In the communication device 100 shown, the size of the dense medium 40 exceeds the size of the antenna 30, and the size of the reference ground layer within the modular antenna 30 is less than or equal to the size of the antenna 30. Therefore, the size of the dense medium 40 exceeds the size of the reference ground layer within the antenna 30. Based on this, the size of the reference ground layer can be increased to direct the energy of the electromagnetic field extended within the dense medium 40 as far away from the reference ground layer as possible, thereby further improving the gain of the antenna 30. To optimize the size of the reference ground layer of the antenna 30 without affecting its modularity, in some embodiments, the reference ground layer of the antenna 30 can be electrically connected to a larger-sized middle plate 23 or a reference ground layer within a circuit board to increase the size of the reference ground layer of the antenna 30, thereby further improving the gain of the antenna 30.

[0091] Please see Figure 10 and Figure 11 , Figure 10 for Figures 1-3 The communication device 100 shown is equipped with a high-density medium 40, and the size of the reference ground layer of the antenna 30 is optimized. The radiation pattern of the antenna 30 at 26 GHz is shown below. Figure 11 for Figures 1-3The radiation pattern of the communication device 100 at 28 GHz is shown after the communication device 100 is equipped with a high-density medium 40 and the size of the reference ground layer of the antenna 30 is optimized. Figure 10 and Figure 11 As can be seen, after setting the density medium 40 and optimizing the size of the reference layer of antenna 30, the gain of antenna 30 is increased from 7.8 dBi to 14.1 dBi at 26 GHz and from 8.1 dBi to 17.8 dBi at 28 GHz. This further improves the gain of antenna 30.

[0092] It should be noted that when optimizing the size of the reference layer for the antenna 30 with no dielectric 40, please refer to [reference needed]. Figure 12 and Figure 13 , Figure 12 for Figures 1-3 The communication device 100 shown does not have a high-density medium 40, but after optimizing the size of the reference ground layer of the antenna 30, the radiation pattern of the antenna 30 at 26 GHz is shown. Figure 13 for Figures 1-3 The radiation pattern of the communication device 100 at 28 GHz is shown after optimizing the size of the reference ground layer of the antenna 30 without setting the wavelength density medium 40. Figure 12 and Figure 13 It can be seen that the gain slightly increased after optimizing the size of the reference ground layer of antenna 30. Specifically, the gain of antenna 30 increased from 3.6 dBi to 3.8 dBi at 26 GHz and from 3.7 dBi to 4.0 dBi at 28 GHz, but the radiation pattern also showed distortion. Therefore, it can be concluded that further optimization of the size of the reference ground layer of antenna 30, in addition to setting the wavelength density medium 40, is necessary to achieve a significant increase in gain.

[0093] The above embodiments illustrate an example where the antenna 30 can transmit signals to the side of the back cover 21 away from the screen 10, and the high-density medium 40 is disposed on the inner surface of the back cover 21. As described above, the high-density medium 40 can also be disposed in the area on the back cover 21 opposite to the antenna 30, or on the side of the back cover 21 away from the antenna 30. Furthermore, the antenna 30 can also transmit signals to the side of the frame 22 away from the internal accommodating space of the communication device 100, or to the side of the screen 10 away from the back cover 21. Based on this, the high-density medium 40 can be disposed on the inner surface of the frame 22 or the screen 10, in the area opposite to the antenna 30, or on the side away from the antenna 30.

[0094] Please see Figure 14 , Figure 14Fig. 6 shows the relative positions of the middle plate 23, the back cover 21, the antenna 30 and the wave dense medium 40 in the communication device 100 according to some embodiments of the present application. In the embodiment shown in Fig. 6, the wave dense medium 40 is embedded in the area of the back cover 21 opposite to the antenna 30. In this way, the thickness of the communication device can be reduced, and the communication device can be made thinner.

[0095] In the above embodiments, the hole in the back cover 21 for embedding the wave dense medium 40 can be a blind hole or a through hole. When the hole in the back cover 21 for embedding the wave dense medium 40 is a blind hole, the blind hole can penetrate the inner surface of the back cover 21 and not penetrate the outer surface of the back cover 21, or the blind hole can penetrate the outer surface of the back cover 21 and not penetrate the inner surface of the back cover 21, which is not limited herein. When the hole in the back cover 21 for embedding the wave dense medium 40 is a blind hole and the blind hole penetrates the inner surface of the back cover 21 and not penetrates the outer surface of the back cover 21, part of the wave dense medium 40 is located on the inner side of the back cover 21 and the other part of the wave dense medium 40 is embedded in the blind hole. When the hole in the back cover 21 for embedding the wave dense medium 40 is a blind hole and the blind hole penetrates the outer surface of the back cover 21 and not penetrates the inner surface of the back cover 21, part of the wave dense medium 40 is located on the outer side of the back cover 21 and the other part of the wave dense medium 40 is embedded in the blind hole.

[0096] When the hole in the back cover 21 for embedding the wave dense medium 40 is a through hole, the surface of the wave dense medium 40 away from the antenna 30 can be flush with the outer surface of the back cover 21 or can protrude to the outer side of the back cover 21. Figure 14 In the embodiment shown in Fig. 6, the surface of the wave dense medium 40 away from the antenna 30 is flush with the outer surface of the back cover 21. In this way, the neatness of the appearance of the communication device 100 can be improved.

[0097] In the above embodiments, the outer surface of the back cover 21 refers to the surface of the back cover 21 away from the internal accommodating space of the communication device 100, i.e., the surface of the back cover 21 away from the screen 10. The outer side of the back cover 21 refers to the side of the outer surface of the back cover 21 away from the inner surface of the back cover 21. Correspondingly, the inner side of the back cover 21 refers to the side of the inner surface of the back cover 21 away from the outer surface of the back cover 21.

[0098] When the hole in the back cover 21 for embedding the wave dense medium 40 is a through hole, the wave sparse medium on the side of the wave dense medium 40 close to the antenna 30 is air, and the wave sparse medium on the side of the wave dense medium 40 away from the antenna 30 is also air. The dielectric constant DK of air is small, approximately 1, and has little effect on the F-P effect of the wave dense medium 40.

[0099] Please refer to Figure 15 , Figure 15Fig. 2 shows a schematic diagram of the relative positions of the middle plate 23, the back cover 21, the antenna 30 and the wave-dense medium 40 in the communication device 100 according to some embodiments of the present application. In this embodiment, the wave-dense medium 40 includes a first portion 41 and a second portion 42. The first portion 41 is formed by a partial area of the back cover 21. The second portion 42 is located between the first portion 41 and the antenna 30, and is arranged on the surface of the first portion 41 close to the antenna 30 (i.e. the inner surface of the first portion 41). In this way, the sum of the thicknesses of the first portion 41 and the second portion 42 is the thickness D of the wave-dense medium 40, which is also conducive to the thinness of the communication device, and since the second portion 42 is arranged on the surface of the first portion 41 close to the antenna 30, it does not affect the appearance of the communication device.

[0100] In other embodiments, the second portion 42 can also be arranged on the surface of the first portion 41 away from the antenna 30 (i.e. the outer surface of the first portion 41). Alternatively, please refer to Figure 16 , Figure 16 Fig. 3 shows a schematic diagram of the relative positions of the middle plate 23, the back cover 21, the antenna 30 and the wave-dense medium 40 in the communication device 100 according to some embodiments of the present application. In this embodiment, a part of the second portion 42 is arranged on the inner surface of the first portion 41, and another part of the second portion 42 is arranged on the outer surface of the first portion 41.

[0101] In some embodiments, please continue to refer to Figure 16 , the first portion 41 and the second portion 42 are integrally formed. In this way, the complexity of the structure of the communication device can be reduced, and the assembly efficiency can be improved.

[0102] In the embodiments shown in Figure 15 and Figure 16 , the wave-dense medium 40 close to the antenna 30 is air, and the wave-dense medium 40 away from the antenna 30 is also air. The dielectric constant DK of air is small, approximately 1, and has little effect on the F-P effect of the wave-dense medium 40.

[0103] Please refer to Figure 17 , Figure 17 Fig. 4 shows a schematic diagram of the relative positions of the middle plate 23, the back cover 21, the antenna 30 and the wave-dense medium 40 in the communication device 100 according to some embodiments of the present application. In this embodiment, the wave-dense medium 40 is located on the side of the back cover 21 away from the antenna 30, i.e. the wave-dense medium 40 is located on the outer side of the back cover 21. Specifically, the wave-dense medium 40 is arranged on the outer surface of the back cover 21. In this way, the wave-dense medium 40 does not occupy the internal accommodation space of the communication device, and can avoid squeezing the installation space of other devices in the communication device.

[0104] In the above embodiment, the less dense medium located on the side of the dense medium 40 closer to the antenna 30 is the back cover 21, and the less dense medium located on the side of the dense medium 40 farther from the antenna 30 is air. Optionally, the back cover 21 can be made of plastic or glass. Plastic and glass have lower dielectric constants, thus having a smaller impact on the FP effect of the dense medium 40.

[0105] Please see Figure 18 , Figure 18 This is a schematic diagram of the rear structure of a communication device 100 provided in some embodiments of this application. In this embodiment, the communication device 100 further includes a camera decorative element 50, which is disposed on the back cover 21. In some embodiments, the signal transmission direction of the antenna 30 is directed towards the camera decorative element 50. Based on this, please refer to... Figure 19 , Figure 19 for Figure 18 The diagram shows a cross-sectional view of the communication device 100 along the BB direction. The camera decorative element 50 includes a decorative element body 51 and a light-transmitting plate 52 disposed on the side of the decorative element body 51 away from the antenna 30. The decorative element body 51 has a first mounting hole 51a. A portion of the wavelength density medium 40 is located on the side of the camera decorative element 50 closer to the antenna 30, and the other portion of the wavelength density medium 40 is installed in the first mounting hole 51a of the decorative element body 51. In this way, the thickness of the communication device 100 can be reduced to a certain extent, while ensuring the appearance consistency of the camera decorative element 50.

[0106] Please see Figure 20 , Figure 20 This is a schematic diagram showing the relative positions of the inner plate 23, camera decorative element 50, antenna 30, and wavelength density medium 40 within a communication device 100 provided in some embodiments of this application. In this embodiment, the decorative element body 51 has a first mounting hole 51a, and the light-transmitting plate 52 has a second mounting hole 52a. A portion of the wavelength density medium 40 is mounted in the first mounting hole 51a of the decorative element body 51, a portion of the wavelength density medium 40 is mounted in the second mounting hole 52a of the light-transmitting plate 52, and the remaining portion of the wavelength density medium 40 is located on the side of the camera decorative element 50 closer to the antenna 30. This significantly reduces the thickness of the communication device 100.

[0107] Please see Figure 21 , Figure 21This is a schematic diagram showing the relative positions of the inner plate 23, camera trim 50, antenna 30, and wavelength density medium 40 within a communication device 100 according to some embodiments of this application. In this embodiment, the wavelength density medium 40 is located on the side of the camera trim 50 furthest from the antenna 30, that is, the wavelength density medium 40 is located on the outer side of the camera trim 50. Specifically, the wavelength density medium 40 is disposed on the outer surface of the camera trim 50. In this way, the wavelength density medium 40 does not occupy the internal storage space of the communication device, thus avoiding compression of the installation space of other components within the communication device.

[0108] When antenna 30 transmits a signal toward the side of frame 22 that is away from the internal housing space of communication device 100, please refer to Figure 22 , Figure 22 This is a schematic diagram of the rear structure of a communication device 100 provided in some embodiments of this application. The frame 22 includes a lower frame 221, a left frame 222, a right frame 223, and a top frame 224. Please refer to... Figure 23 , Figure 23 for Figure 22 The diagram shows the structure of the communication device 100 as viewed from direction D1. In this embodiment, the antenna 30 transmits signals to the side of the lower frame 221 away from the internal accommodating space of the communication device 100. The wave density medium 40 is disposed on the inner surface of the lower frame 221, embedded in the lower frame 221, integrally formed with the lower frame 221, or disposed on the outer surface of the lower frame 221. In other embodiments, please refer to... Figures 24-26 , Figure 24 for Figure 22 A schematic diagram of the communication device 100 as seen from direction D2; Figure 25 for Figure 22 A schematic diagram of the communication device 100 as viewed from direction D3; Figure 26 for Figure 22 The diagram shows the structure of the communication device 100 as viewed from direction D4. The antenna 30 can also transmit signals to the side of the left frame 222, right frame 223, or top frame 224 away from the internal accommodating space of the communication device 100. In this way, the wave density medium 40 is disposed on the inner surface of the left frame 222, right frame 223, or top frame 224, embedded in the left frame 222, right frame 223, or top frame 224, or disposed on the outer surface of the left frame 222, right frame 223, or top frame 224.

[0109] In the communication device of the above embodiments, the number of the antennas 30 can be one or multiple, and the multiple antennas 30 can be arranged in an array. When the number of the antennas 30 is multiple, one wave density medium 40 can be provided for each antenna 30, or one wave density medium 40 can be provided for the multiple antennas 30, which can cover the multiple antennas 30 to improve the gain of the multiple antennas 30, and the specific limitation is not made herein.

[0110] For example, refer to Figure 27 , Figure 27 The relative position diagrams of the antennas 30, the wave density medium 40, and the middle plate 23 in the communication device 100 are provided for some other embodiments of the present application. The number of the antennas 30 is multiple, and the multiple antennas 30 are integrated in the same carrier medium 31. In some embodiments, the carrier medium 31 can be formed by alternately and sequentially stacking the insulating medium layers and the metal layers, and the antennas 30 can be formed by the metal layers in the carrier medium 31 and the metallized vias connected between the multiple metal layers. One wave density medium 40 can be provided for each antenna 30, and the wave density mediums 40 corresponding to the multiple antennas 30 are independent of each other. In this way, the volume of the single wave density medium 40 is small, and the cost of the single wave density medium 40 is low.

[0111] For example, refer to Figure 28 , Figure 28 The relative position diagrams of the antennas 30, the wave density medium 40, and the middle plate 23 in the communication device 100 are provided for some other embodiments of the present application. The number of the antennas 30 is multiple, and the multiple antennas 30 are also integrated in the same carrier medium 31. The multiple antennas 30 correspond to one wave density medium 40, which can cover the multiple antennas 30 to improve the gain of the multiple antennas 30. In this way, the number of the wave density mediums 40 is small, the complexity of the component structure of the communication device is low, the assembly difficulty is small, and the efficiency is high.

[0112] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication device, characterized in that, The device includes a screen, a back cover, an antenna, and a dense medium. The screen and the back cover are arranged opposite to each other and are used to define the internal accommodating space of the communication device. The antenna is a millimeter-wave band antenna and is arranged in the internal accommodating space of the communication device. The dense medium is located in the transmission direction of the antenna and is spaced apart from the antenna. The dielectric constant of the medium on the side of the dense medium closer to the antenna and the dielectric constant of the medium on the side of the dense medium farther from the antenna are both less than the dielectric constant of the dense medium. The thickness D of the dense medium from the surface closer to the antenna to the surface farther from the antenna satisfies: 0.5nλg1(1-10%)≤D≤0.5nλg2(1+10%), where λg1 is the resonant wavelength of the upper limit frequency of the antenna operating band in the dense medium, and λg2 is the resonant wavelength of the lower limit frequency of the antenna operating band in the dense medium. Wherein, the thickness D of the diameter medium is less than or equal to 2 mm and greater than or equal to 0.1 mm, and the dielectric constant DK of the diameter medium is greater than or equal to 14 and less than or equal to 40.

2. The communication device according to claim 1, characterized in that, The material of the bromide medium is zirconia ceramic or alumina ceramic.

3. The communication device according to claim 1, characterized in that, n=1。 4. The communication device according to claim 1, characterized in that, An air gap separates the antenna from the dense medium, and the air gap forms a medium within the communication device located on the side of the dense medium closer to the antenna.

5. The communication device according to claim 4, characterized in that, The distance between the antenna and the high-density medium is greater than 0 mm and less than 10 mm.

6. The communication device according to claim 4 or 5, characterized in that, The antenna is located inside the back cover, and the high-density medium is located between the antenna and the back cover and disposed on the inner surface of the back cover. The back cover forms the medium within the communication device located on the side of the high-density medium away from the antenna.

7. The communication device according to claim 4 or 5, characterized in that, The antenna is located inside the back cover, and the high-density dielectric is embedded in the area of ​​the back cover opposite to the antenna.

8. The communication device according to claim 4 or 5, characterized in that, The antenna is located inside the back cover, and the wave density medium includes a first part and a second part, wherein the first part is formed by a portion of the back cover. The second part is located between the first part and the antenna, and the second part is disposed on the inner surface of the first part; Alternatively, the second portion may be located on the side of the first portion away from the antenna, and the second portion may be disposed on the outer surface of the first portion; Alternatively, a portion of the second part may be located between the first part and the antenna and disposed on the inner surface of the first part, while another portion may be located on the side of the first part away from the antenna and disposed on the outer surface of the first part.

9. The communication device according to claim 8, characterized in that, The first part and the second part are integrally formed.

10. The communication device according to claim 1, characterized in that, The antenna is located inside the back cover, the wave density medium is located outside the back cover, and the wave density medium is disposed on the outer surface of the back cover.

11. The communication device according to claim 1, characterized in that, The orthographic projection of the antenna onto the back cover is the first projection, and the orthographic projection of the density medium onto the back cover is the second projection. The area of ​​the second projection is larger than the area of ​​the first projection, and the edge of the second projection is located outside the edge of the first projection, with the edge of the second projection and the edge of the first projection spaced apart.

Images