Antenna applied to lenses and glasses

Abstract

The invention discloses an antenna applied to lenses and glasses, and relates to the technical field of communication. Non-physical connection of the antenna and the metal assembly is realized through a floor gap between the antenna ground end and the metal assembly, a feed gap between the feed branch knot and the antenna ground end and a coupling gap between the radiation branch knot and a layer where the metal assembly is located, and meanwhile, the metal assembly is used as a part of the antenna and is excited in a coupling mode, so that the antenna is formed. An antenna loop is formed to realize the function of the antenna, the electrical length of the radiation branch knot is reduced, and the conductor loss of metal is also reduced. Since the radiation branch excites the metal assembly to generate the corresponding resonance points in each preset resonance frequency to realize the requirement of multiple frequency points, the metal assembly does not need to be slotted or windowed, the integrity of the glasses is kept, and the antenna design difficulty is reduced. The antenna is arranged at the edge of the lens, and the feed branch knot is arranged at the edge area of the lens, thereby avoiding approaching the center of the lens, and not influencing the optical display effect of the AR glasses.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to an antenna and glasses applied to lenses. Background Art

[0002] In current wearable devices, the temple or frame of augmented reality (AR) glasses usually adopts a metal material. However, the metal material will shield electromagnetic signals. To avoid affecting the antenna performance of AR glasses, slits or windows are opened in the temple or frame of AR glasses, resulting in an incomplete structure of the glasses.

[0003] To improve this situation, a transparent metal grid is used to design an antenna on a transparent lens to achieve the function of the antenna.

[0004] On the one hand, if the antenna pattern of the transparent lens antenna is close to the center of the lens, it will affect the optical display characteristics of AR glasses. On the other hand, if the transparent lens antenna is attached to the lens and the lens needs to be embedded in the frame, it is difficult to achieve reliable physical and electrical connections between the transparent antenna and the metal frame, increasing the design difficulty of the antenna.

[0005] Therefore, how to achieve non-physical connection between the antenna and the metal frame while keeping the structure of the glasses complete to reduce the design difficulty of the antenna is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an antenna and glasses applied to lenses to solve the technical problems of incomplete structure, unreliable physical connection and high antenna design difficulty of current glasses.

[0007] To solve the above technical problems, the present invention provides an antenna applied to a lens, the antenna comprising a radiation branch, a feeding branch, a metal component and an antenna ground end;

[0008] The antenna ground end is located at the edge of the lens, and there is a floor gap between the antenna ground end and the metal component;

[0009] The feeding branch has a feeding gap with the antenna ground end and is fixed in the edge area of the lens;

[0010] The radiation branch is connected to the feeding branch and has a coupling gap with the layer where the metal component is located. The radiation branch is used to excite the metal component to generate corresponding resonance points within each preset resonance frequency.

[0011] Preferably, the feeding branch is perpendicular to the plane where the inner side wall of the layer where the metal component is located is located.

[0012] Preferably, the radiation branch at least includes a first radiation branch;

[0013] The first radiating stub includes a first sub-radiating stub and a second sub-radiating stub;

[0014] The first sub-radiating stub is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiating stub is connected to the feeding stub;

[0015] The first end of the second sub-radiating stub is connected to the second end of the first sub-radiating stub, and the second end of the second sub-radiating stub is close to the edge of the metal component and perpendicular to the edge of the metal component.

[0016] Preferably, the radiating stub further includes a second radiating stub;

[0017] The second radiating stub is perpendicularly connected to the feeding stub and connected to the first end of the first sub-radiating stub.

[0018] Preferably, the antenna ground end, the feeding stub and the feeding slot together form a coplanar waveguide for feeding.

[0019] Preferably, the antenna ground end is a U-shaped loop.

[0020] Preferably, the part of the feeding stub close to the U-shaped loop adopts the structure of a solid metal conductor, and the part close to the radiating stub adopts the structure of a metal grid;

[0021] And / or, the radiating stub adopts the structure of a metal grid;

[0022] And / or, the U-shaped loop adopts the structure of a solid metal conductor.

[0023] Preferably, the first radiating stub is L-shaped, and the first sub-radiating stub is arc-shaped.

[0024] Preferably, it further includes a coaxial inner conductor and a coaxial outer conductor;

[0025] The coaxial inner conductor is connected to the solid metal conductor part of the feeding stub;

[0026] The coaxial outer conductor is connected to the U-shaped loop.

[0027] Preferably, the first radiating stub and the second radiating stub operate in a monopole mode at the first high-frequency resonance frequency and the second high-frequency resonance frequency respectively to generate different resonance points.

[0028] Preferably, the metal component is located at the frame for fixing the lens.

[0029] To solve the above technical problems, the present invention further provides a pair of glasses, which includes a front frame, lenses, a rear frame, and the antenna applied to the lenses as described above.

[0030] The antenna is located inside the lens, and the lens and the antenna are located between the front frame and the rear frame.

[0031] An antenna applied to a lens provided by the present invention includes radiation branches, a feeding branch, a metal component, and an antenna ground end; the antenna ground end is located at the edge of the antenna, and there is a floor gap between it and the metal component; there is a feeding gap between the feeding branch and the antenna ground end, and it is fixed in the edge area of the lens; the radiation branch is connected to the feeding branch and has a coupling gap with the layer where the metal component is located. The radiation branch is used to excite the metal component to generate corresponding resonance points within each preset resonance frequency. Through the floor gap between the antenna ground end and the metal component, the feeding gap between the feeding branch and the antenna ground end, and the coupling gap between the radiation branch and the layer where the metal component is located, the present invention realizes the non-physical connection between the antenna and the metal component. At the same time, by borrowing the metal component as part of the antenna and exciting the metal component through the coupling method, an antenna loop is formed to realize the function of the antenna, reducing the length of the radiation branches composed of the metal grid and also reducing the conductor loss of the metal, thereby improving the antenna efficiency. Since the radiation branch excites the metal component to generate corresponding resonance points within each preset resonance frequency to meet the requirements of multiple frequency points, there is no need to open slots or windows in the metal component, maintaining the integrity of the glasses without changing the structure of the glasses and reducing the antenna design difficulty. The antenna is arranged at the edge of the lens, and the feeding branch is in the edge area of the lens, avoiding being close to the center of the lens and not affecting the optical display effect of the AR glasses.

[0032] In addition, the present invention further provides a pair of glasses, which has the same beneficial effects as the antenna applied to the lens as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of an antenna applied to a lens provided by an embodiment of the present invention;

[0035] Figure 2 It is a schematic structural diagram of a pair of glasses provided by an embodiment of the present invention;

[0036] Figure 3 It is an A - A cross-sectional view of an antenna of a pair of glasses provided by an embodiment of the present invention;

[0037] Figure 4 The front view of an antenna applied to a lens provided by an embodiment of the present invention;

[0038] Figure 5 The schematic diagram of the simulated S curve of an antenna applied to a lens provided by an embodiment of the present invention, which loads a first radiation branch and a second radiation branch; 1,1 Schematic diagram;

[0039] Figure 6 The schematic diagram of the simulated S curve of the metal frame and plastic frame of the glasses to which an antenna applied to a lens provided by an embodiment of the present invention belongs; 1,1 Schematic diagram;

[0040] Figure 7 The schematic diagram of the simulated surface current distribution of an antenna applied to a lens provided by an embodiment of the present invention at 2.44 GHz;

[0041] Figure 8 The schematic diagram of the simulated surface current distribution of an antenna applied to a lens provided by an embodiment of the present invention at 5.39 GHz;

[0042] Figure 9 The schematic diagram of the simulated surface current distribution of an antenna applied to a lens provided by an embodiment of the present invention at 7.4 GHz;

[0043] Figure 10 The schematic diagram of the curve of the measured S of an antenna applied to a lens provided by an embodiment of the present invention 1,1 changing with frequency;

[0044] Figure 11 The schematic diagram of the curve of the measured efficiency of an antenna applied to a lens provided by an embodiment of the present invention changing with frequency;

[0045] Figure 12 The schematic diagram of the structure of another antenna applied to a lens provided by an embodiment of the present invention. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] The core of the present invention is to provide an antenna and glasses applied to a lens to solve the technical problems of the incomplete structure, unreliable physical connection of the current glasses, and the relatively high difficulty in antenna design.

[0048] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] It should be noted that by opening slits or windows on the metal body, although the radiation characteristics of the antenna are ensured, the overall structure design, processing difficulty and cost of the whole machine are increased. The way of opening slits or windows can make the antenna excite new modes and provide new resonant frequencies to reduce the design difficulty of the antenna. In addition, with the rapid development of wireless communication, if only a single communication method is difficult to meet the needs of users. Mobile communication devices are required to support multiple communication methods, such as Bluetooth, the fourth generation network (4G) / the fifth generation network (5G), Wireless Fidelity (Wi-Fi), etc. Based on this, the antenna needs to cover multiple operating frequency bands. However, the multi-band antenna has a complex structure, many traces, and a large number of slits or windows, which puts high requirements on the metal body structure. The antenna applied to the lens provided by the present invention can provide multiple operating frequency bands without opening slits or windows on the glasses, so as to reduce the design difficulty of the glasses.

[0050] Figure 1 The following is a schematic structural diagram of an antenna applied to a lens according to an embodiment of the present invention, as Figure 1 shown, the antenna includes a radiation branch 1, a feeding branch 2, a metal component, and an antenna ground end 3;

[0051] The antenna ground end 3 is located at the edge of the lens and there is a ground plane gap between it and the metal component;

[0052] There is a feeding gap 4 between the feeding branch 2 and the antenna ground end 3, and it is fixed in the edge area of the lens;

[0053] The radiation branch 1 is connected to the feeding branch 2 and there is a coupling gap with the layer where the metal component is located. The radiation branch 1 is used to excite the metal component to generate corresponding resonant points within each preset resonant frequency.

[0054] Specifically, the antenna includes a radiation branch, a feeding branch, a metal component, and an antenna ground end. The radiation branch is one of the antenna structure branches for radiating electromagnetic waves, and the feeding branch is a radio frequency circuit structure for feeding the radio frequency signal into the radiation branch well. The antenna ground end is used to make the efficiency of the antenna reach the best, so that the signal transmission, antenna radiation and reception effects are better. The antenna ground end is used as a reference ground and is connected to the edge side of the lens of the glasses.

[0055] The antenna and the metal component are in different layers and are arranged at the edge of the glasses. Figure 2 The following is a schematic structural diagram of a pair of glasses according to an embodiment of the present invention, as Figure 2As shown, the antenna and the metal component are on different layers. The ground end of the antenna is located at the edge of the lens, and there is a floor gap between it and the metal component. The floor gap in this embodiment is based on the gap between the grounding layer of the ground end of the antenna and the metal component. The shape of the ground end of the antenna is not limited here and can be designed in consideration of the curvature of the lens or the shape of the feeding stub. It can be concave or other shapes, etc.

[0056] There is a feeding gap between the feeding stub and the ground end of the antenna, and the feeding stub is fixed in the edge area of the lens. The feeding stub is used to adjust the distance between the antenna and the edge of the metal component to adjust the impedance matching of the antenna. The gap between the ground end of the antenna and the feeding stub serves as a radiation unit, and by coupling and exciting this feeding, it radiates energy outward to complete the impedance matching. In order not to affect the optical display of the glasses, the feeding stub is fixed in the edge area of the lens.

[0057] The radiation stub is connected to the feeding stub, and there is a coupling gap between the layer where the radiation stub is located and the layer where the metal component is located. Figure 3 This is a cross-sectional view of a glasses antenna A-A provided by an embodiment of the present invention. As Figure 3 shown, Figure 3 The metal component in it is located at the frame of the glasses to form a metal frame. There is a longitudinal coupling gap between the tail of the radiation stub and the metal frame. By exciting the metal frame through the coupling gap for radiation, this radiation stub is used to excite the metal frame (metal component) to generate corresponding resonance points within each preset resonance frequency. It should be noted that each preset resonance frequency includes a low-frequency resonance frequency and a high-frequency resonance frequency, and the specific frequency values corresponding to the resonance frequencies can be set according to the actual situation. By adjusting the length and width of the radiation stub, the coupling strength between the radiation stub and the metal frame (metal component) can be adjusted to achieve impedance matching. There is no requirement for the limitation of the length and width of the radiation stub here, and it can be set based on the actual situation.

[0058] For the antenna applied to the lens in this embodiment, a thin film can be used as a carrier, and the radiation stub, the feeding stub, and the ground end of the antenna are attached to this carrier. The thin film can be an S-PET thin film, which is transparent and colorless, has high heat resistance characteristics, and allows low-temperature reflow soldering. Each component of the antenna applied to the lens in this embodiment is pasted on the lens through an optically clear adhesive (OCA). The thickness of this thin film can be 100 um.

[0059] It should be noted that the metal component in this embodiment can be a formed metal layer or can also correspond to Figure 2 and Figure 3In the embodiment of the metal frame, specifically, the metal component is located at the frame for fixing the lens to form a metal frame. It can also be a layer of metal paint plated on the frame to achieve electrical conductivity. Therefore, the frame of the corresponding glasses can be a frame made of metal or a frame made of plastic, which is not limited here. If the frame is made of metal, the metal component of the present invention is the metal frame. If the frame is made of plastic, its metal component can be a metal layer, or the metal paint plated on the metal frame made of plastic, etc., which can be set according to the actual situation.

[0060] An antenna applied to a lens provided by an embodiment of the present invention includes radiation branches, a feeding branch, a metal component, and an antenna ground end; the antenna ground end is located at the edge of the antenna, and there is a ground plane gap between the antenna ground end and the metal component; there is a feeding gap between the feeding branch and the antenna ground end, and the feeding branch is fixed in the edge area of the lens; the radiation branches are connected to the feeding branch and there is a coupling gap with the layer where the metal component is located. The radiation branches are used to excite the metal component to generate corresponding resonance points within each preset resonance frequency. The present invention realizes the non - physical connection between the antenna and the metal component through the ground plane gap between the antenna ground end and the metal component, the feeding gap between the feeding branch and the antenna ground end, and the coupling gap between the radiation branches and the layer where the metal component is located. At the same time, by borrowing the metal component as part of the antenna and exciting the metal component through the coupling method, an antenna loop is formed to realize the function of the antenna, reducing the length of the radiation branches composed of the metal grid and also reducing the conductor loss of the metal, improving the antenna efficiency. Since the radiation branches excite the metal component to generate corresponding resonance points within each preset resonance frequency to meet the requirements of multiple frequency points, there is no need to open slots or windows in the metal component, maintaining the integrity of the glasses without changing the structure of the glasses and reducing the antenna design difficulty. The antenna is arranged at the edge of the lens, and the feeding branch is in the edge area of the lens, avoiding being close to the center of the lens and not affecting the optical display effect of the AR glasses.

[0061] In some embodiments, the feeding branch is perpendicular to the plane where the inner side wall of the layer where the metal component is located is located.

[0062] The feeding branch is as Figure 2 shown, its position is perpendicular to the edge of the lens. This lens edge is the lens edge at the intersection of the lens, the metal frame, and the temple of the glasses. The feeding branch is mainly used to adjust the distance between the antenna applied to the lens and the edge of the metal frame, thereby controlling the coupling strength between the whole antenna applied to the lens and the metal frame to adjust the impedance matching of the antenna applied to the lens. The coupling degree in this embodiment is used to characterize the coupling strength.

[0063] On the basis of the above - mentioned embodiments, the radiation branches at least include a first radiation branch;

[0064] The first radiation branch includes a first sub - radiation branch and a second sub - radiation branch;

[0065] The first sub-radiating stub is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiating stub is connected to the feeding stub;

[0066] The first end of the second sub-radiating stub is connected to the second end of the first sub-radiating stub, and the second end of the second sub-radiating stub is close to the edge of the metal component and perpendicular to the edge of the metal component.

[0067] As Figure 2 shown, since the radiating stub adjusts the respective resonant frequencies of the antenna, the number of corresponding radiating stubs is not limited. In this embodiment, there is at least a first radiating stub. The first radiating stub corresponds to different adjusted resonant frequencies based on different shapes. The first radiating stub includes a first sub-radiating stub and a second sub-radiating stub. The first sub-radiating stub is close to the edge of the metal frame and parallel to the metal frame, and is used to adjust the low-frequency resonant frequency and the first high-frequency resonant frequency of the antenna.

[0068] Figure 4 This is a front view of an antenna applied to a lens provided by an embodiment of the present invention. As Figure 4 shown, the first end of the first radiating stub is connected to the feeding stub, specifically to the extending direction of the feeding stub. The first radiating stub is used to adjust the low-frequency resonant frequency and the first high-frequency resonant frequency of the antenna, and mainly adjusts the length of the first radiating stub to adjust the frequency.

[0069] The first end of the second sub-radiating stub 6 is connected to the second end of the first sub-radiating stub 5. The second end of the second sub-radiating stub 6 is close to the edge of the metal frame and perpendicular to the edge of the metal frame. It can be understood that the second end of the second sub-radiating stub is close to the edge of the metal frame, or can penetrate into the interior of the frame, or there can be a certain coupling gap between it and the metal frame to play a role in coupling and exciting the metal frame to generate a low-frequency resonant point. The metal frame is excited to radiate through the coupling gap to extend the electrical length of the antenna applied to the lens in the low-frequency band, so as to realize the miniaturized design of the glasses antenna. The width of this coupling gap affects the coupling strength between the second sub-radiating stub and the metal frame, and the optimal performance of the antenna is achieved by optimizing the width of this coupling gap. In addition, the width corresponding to the coupling gap is not limited, and it can be 1.25 mm, or other width specifications, etc.

[0070] In some embodiments, the radiating stub further includes a second radiating stub 7;

[0071] The second radiating stub 7 is perpendicularly connected to the feeding stub 2 and connected to the first end of the first sub-radiating stub 5.

[0072] Specifically, the second radiation branch is vertically connected to the feeding branch, is located at the extension of the feeding branch, is connected to the first end of the first radiation branch, is opposite to the extension direction of the first radiation branch, is located at the upper part of the antenna, and is used to adjust the second high-frequency resonance frequency of the antenna to generate a high-frequency resonance point. In this embodiment, the second high-frequency resonance frequency is adjusted by adjusting the length of the second radiation branch.

[0073] On the basis of the above-mentioned embodiment, the radiation branches are designed along the edge of the lens, are smaller in size and farther away from the human eye and the display area of ​​the lens, are not easily perceived by the human eye, and have less impact on the optical properties of the lens.

[0074] In some embodiments, the shape of the first radiation branch is defined such that the first radiation branch is L-shaped, and the first sub-radiation branch is arc-shaped.

[0075] The L-type includes a first sub-radiating branch and a second sub-radiating branch. The first sub-radiating branch has an L-shaped vertical shape and an arc-shaped design. The main consideration is that the edge shape of the lens is an arc-shaped, which is more optically fit and does not affect the optical display area of ​​the human eye.

[0076] The different types of radiating branches in the embodiments of the present invention can achieve communication modes with multiple working frequencies through the design of different types of radiating branches, avoiding a single communication mode. In addition, the radiating branches and the metal frame together constitute an antenna applied to the lens to ensure that multiple frequency points are generated to meet the broadband requirements without the need for opening windows or slits in the glasses.

[0077] On the basis of the above-mentioned embodiments, the antenna ground terminal, the feeding branch and the feeding slot together constitute a coplanar waveguide for feeding. There is a feeding slot between the antenna ground terminal and the feeding branch, and the antenna ground terminal, the feeding branch and the feeding slot together constitute a coplanar waveguide for feeding. By adjusting the width between the antenna ground terminal and the feeding slot, and adjusting the length of the antenna ground terminal to achieve the impedance matching of the antenna applied to the lens, even if there is a non-physical connection of the floor gap between the antenna ground terminal and the metal component, the distance between the antenna ground terminal and the metal component is relatively close, and the coupling between the two is relatively strong. They are connected at radio frequency by coupling, which not only expands the size of the antenna ground terminal, but also provides a higher degree of freedom for antenna design, especially provides a coupling path for the design of low-frequency loop antennas, so that the metal component becomes part of the antenna.

[0078] In some embodiments, the antenna ground end is a U-shaped loop.

[0079] The ground end of the antenna is specifically designed as a U-shaped loop. By adjusting the width between the U-shaped loop and the feeding slot, and adjusting the length of the U-shaped loop, the impedance matching of the antenna applied to the lens can be adjusted. The U-shaped loop provided in this embodiment can adjust the strength of coupling by adjusting the shape, length of the U-shaped loop, and the width between the U-shaped loop and the feeding branch.

[0080] In some embodiments, the part of the feeding branch close to the U-shaped loop adopts the structure of a solid metal conductor, and the part close to the radiation branch adopts the structure of a metal grid.

[0081] And / or, the radiation branch adopts the structure of a metal grid.

[0082] And / or, the U-shaped loop adopts the structure of a solid metal conductor.

[0083] Specifically, the feeding branch adopts a mixed metal grid material. Specifically, the part close to the U-shaped loop adopts the structure of a solid metal conductor (pure metal), and the part close to the radiation branch adopts the structure of a metal grid. The pure metal part is hidden inside the frame. An ideal antenna does not consider the feeding point, but in order to lead out the signal, the led-out point is used as the feeding point, that is, in this embodiment, the feeding directly adopts the structure of a solid metal conductor as the feeding point.

[0084] Adopting the structure of a metal grid, due to the conductor loss of the metal grid and the small conductor loss of pure metal which can be ignored, the area of the metal grid is reduced as much as possible. The structure of pure metal is adopted in places where the human eye cannot see, that is, the U-shaped loop adopts the structure of a solid metal conductor, and the part of the feeding branch close to the U-shaped loop adopts the structure of a solid metal conductor (pure metal); in places where the human eye can see, the transparent metal grid form is adopted, that is, the radiation branch adopts the structure of a metal grid, and the part of the feeding branch close to the radiation branch adopts the structure of a metal grid.

[0085] In addition, there is no limitation on the grid specifications of the metal grid. It can be that the line width is 10um, the line thickness is 0.5um, and the line pitch is 100um. The line width is the width of each line, the line thickness is the thickness of each line, and the line pitch is the distance between every two lines. It can also be other parameters, which are not limited here and can be set according to the actual situation.

[0086] In this embodiment, for the metal structures corresponding to the feeding branch, the radiation branch, and the U-shaped loop, their limitations are realized by using the "and / or" method, so as to achieve the diversity of the metal structures of each branch and the U-shaped loop.

[0087] In the metal mesh structure provided in this embodiment, due to the conductor loss of the metal mesh, a coupling gap is formed between the tail of the second sub-radiating branch and the metal frame. The metal frame is excited by the coupling method, so that a low-frequency circular antenna is formed. At the same time, the electrical length of the antenna is reduced, the conductor loss of the metal mesh is reduced, and the efficiency of the antenna applied to the lens is improved.

[0088] In some embodiments, the antenna applied to the lens further includes a coaxial inner conductor and a coaxial outer conductor;

[0089] The coaxial inner conductor is connected to the solid metal conductor part of the feeding branch;

[0090] The coaxial outer conductor is connected to the U-shaped ring.

[0091] Specifically, as Figure 2 shown, the coaxial inner conductor is located inside the feeding branch across the solid metal conductor part and the metal mesh part, and is connected by a low-temperature welding method. The coaxial outer conductor is connected to the U-shaped ring by a low-temperature welding method. The coaxial cable plays a role in feeding the antenna, and the corresponding coaxial feeding point is at the solid metal conductor part of the feeding branch. It can be understood that the corresponding connection method in this embodiment can be low-temperature welding or other welding methods, which are not limited herein and can be set according to actual situations.

[0092] In some embodiments, the first radiating branch and the second radiating branch operate in the monopole mode when corresponding to the first high-frequency resonance frequency and the second high-frequency resonance frequency respectively to generate different resonance points.

[0093] Figure 5 It is a schematic diagram of the simulation S 1,1 curve of an antenna applied to a lens provided in an embodiment of the present invention, with the first radiating branch and the second radiating branch loaded. As Figure 5 shown, when only the first radiating branch is loaded, the antenna has resonance points at 2.45 GHz and 7 GHz, corresponding to the low-frequency resonance point 1 and the high-frequency resonance point 2 respectively. When only the second radiating branch is loaded, the antenna has a resonance point at 5 GHz, corresponding to the high-frequency resonance point 1. When the first radiating branch (radiating branch 1) and the second radiating branch (radiating branch 2) are loaded simultaneously, the antenna has resonance points within the above-mentioned three resonance frequencies. It can realize that the antenna applied to the lens and the metal frame jointly form a multi-mode antenna, realize the broadband design of the antenna, and also avoid the design of opening windows or slits on the glasses, reducing the difficulty and cost of the overall machine structure design and processing, and ensuring the integrity and beauty of the glasses.

[0094] Figure 6 It is a schematic diagram of the simulation S 1,1 curve of the metal frame and plastic frame of the glasses to which the antenna applied to a lens provided in an embodiment of the present invention belongs, asFigure 6 As shown, when a plastic front frame is adopted, the antenna is a quarter-wavelength monopole, and the resonant frequency point is 3.25 GHz. Compared with the metal front frame, the low-frequency resonant frequency of the antenna moves from 2.45 GHz to the high frequency of 3.25 GHz. Figure 7 The following is a schematic diagram of the simulated surface current distribution at 2.44 GHz of an antenna applied to a lens provided by an embodiment of the present invention, as Figure 7 shown. Compared with the plastic front frame, after adopting a metal spectacle frame, the first radiation branch and the metal front spectacle frame jointly form a quarter-wavelength loop antenna through the coupling gap, rather than the monopole mode of the plastic front frame. This implementation method cleverly uses the metal spectacle frame as part of the antenna, extends the electrical length of the first radiation branch, and realizes the miniaturized design of the antenna.

[0095] Figure 8 The following is a schematic diagram of the simulated surface current distribution at 5.39 GHz of an antenna applied to a lens provided by an embodiment of the present invention, as Figure 8 shown. The surface current is mainly concentrated on the second radiation branch, and its operation is a quarter-wavelength monopole, corresponding to the S Figure 5 curve when only the second radiation branch is loaded as shown 1,1 in.

[0096] Figure 9 The following is a schematic diagram of the simulated surface current distribution at 7.4 GHz of an antenna applied to a lens provided by an embodiment of the present invention, as Figure 9 shown. The surface current is concentrated on radiation branch 1, and its operation is a half-wavelength monopole, corresponding to the S Figure 5 curve when only the first radiation branch is loaded as shown 1,1 in.

[0097] Therefore, when the first radiation branch and the second radiation branch respectively correspond to the first high-frequency resonant frequency and the second high-frequency resonant frequency, they operate in the monopole mode to generate different resonant points, so as to realize the function of a multi-mode antenna.

[0098] As Figure 1 shown, the present invention also provides a pair of glasses, including a front spectacle frame, a lens, a rear spectacle frame, and the antenna applied to the lens in the above embodiment;

[0099] The antenna is located inside the lens, and the lens and the antenna are located between the front spectacle frame and the rear spectacle frame.

[0100] Specifically, the antenna is located inside the lens and is pasted on the lens. The material of the lens can be a PC material. The lens is the antenna dielectric substrate. The lens and the transparent antenna are located between the front spectacle frame and the rear spectacle frame and are fixed in the spectacle frame by the front and rear spectacle frames.

[0101] For the introduction of a pair of glasses provided by the present invention, please refer to the above method embodiments, which will not be elaborated herein. It has the same beneficial effects as the above antenna applied to the lens.

[0102] Figure 10 The measured S of an antenna applied to a lens provided by an embodiment of the present invention 1,1 Schematic diagram of the curve changing with frequency, as Figure 10 shown. For this antenna, the operating frequency band with |S 1,1 | ≤ -10 dB is 1.75 GHz - 2.56 GHz and 4.57 GHz - 7.2 GHz. Figure 8 The test results of a pure metal antenna with the same structure and size are also given. Compared with the pure metal antenna, the performance of the transparent antenna of the present invention is basically the same. In addition, compared with traditional terminal antennas such as loop, dipole, and monopole, the antenna has a simple structure and a relatively wide bandwidth. The Wi-Fi 6E / 7 protocol requires operating frequency bands of 2.4 GHz (802.11b / g, frequency band range 2.400 GHz to 2.4835 GHz), 5 GHz (802.11a, frequency band range 5.150 GHz to 5.825 GHz), and 6E (802.11ax, frequency band range 5.925 GHz to 7.125 GHz). The operating frequency bands of the antenna designed by the present invention can cover mobile communication frequency bands such as Wi-Fi 6E / 7, that is, the 2.4 GHz frequency band (2.4 - 2.485 GHz), the 5 GHz frequency band (5.15 - 5.85 GHz), and the 6 GHz frequency band (5.925 - 7.125 GHz), meeting the requirements of Wi-Fi 7 for the antenna operating frequency band.

[0103] Figure 11 Schematic diagram of the curve of the measured efficiency of an antenna applied to a lens provided by an embodiment of the present invention changing with frequency, as Figure 11 shown. For multi-band Wi-Fi mobile terminal products, the antenna efficiency is generally required to be greater than -5 dB. In the frequency band of 2.38 GHz - 2.5 GHz in the embodiment of the present invention, the antenna efficiency is -1.70 dB to -1.97 dB; in the frequency band of 5.05 GHz - 7.25 GHz, the antenna efficiency is -1.33 dB to -3.12 dB, far higher than the communication index requirements. In addition, under the test results of a pure metal antenna with the same structure and size, compared with the pure metal antenna, the efficiency loss of this transparent antenna is only within 0.65 dB. The antenna of the present invention has higher efficiency than traditional transparent antennas.

[0104] The transparent antenna of the present invention does not occupy the internal space of the glasses, eliminates the need for slits or windows on the glasses housing, and does not require any form of physical connection with the metal housing. It has a simple structure and is easy to implement, ensuring both the integrity and aesthetics of the AR glasses' appearance while reducing the volume of the AR glasses. The antenna applied to the lens of the present invention allows the glasses to use a metal frame without changing the structure of the metal housing, reducing the difficulty and cost of the overall machine structure design and processing, and ensuring the integrity and aesthetics of the metal body.

[0105] The transparent antenna of the present invention is designed along the outer edge of the frame, far from the center position of the human eye. Therefore, it is extremely difficult for the antenna of the present invention to be detected by the human eye. At the same time, the optical display area of the AR glasses corresponds to the center position of the human eye. Therefore, the antenna of the present invention is also far from the optical display area, retaining as much as possible the original optical characteristics of the AR glasses' optical waveguide.

[0106] The antenna structure applied to the lens is compact, and only the peripheral space of the lens is used for antenna design. As a visual organ, the human eye has an observation range of plus or minus 60 degrees in the horizontal direction and plus or minus 40 degrees in the vertical direction. Moreover, as the angle expands, the human eye's vision rapidly decreases. For example, when the horizontal direction angle reaches 60 degrees, the human eye's vision drops to less than one-tenth of that at 0 degrees. This means that although the human eye can see objects within a wide angle range, the clarity will be greatly reduced. As Figure 4 shown, after a person wears glasses, the center of the human eye usually does not coincide with the center of the lens, and the center of the human eye is closer to the inside relative to the center of the lens. The transparent antenna of the present invention is designed along the outer edge of the frame, far from the center position of the human eye. Therefore, it is extremely difficult for the antenna of the present invention to be detected by the human eye. At the same time, the optical display area of the AR glasses corresponds to the center position of the human eye. Therefore, the antenna of the present invention is also far from the optical display area, retaining as much as possible the original optical characteristics of the AR glasses' optical waveguide.

[0107] Figure 12 FIG. is a schematic structural diagram of another antenna applied to the lens provided by an embodiment of the present invention. As Figure 12 shown, the metal component corresponding to the antenna is a metal frame, and this metal frame is in the front frame (metal front frame) of the glasses. The antenna includes a radiation branch 1, a feeding branch 2, a metal component 11, and an antenna ground end 3. The antenna ground end 3 is located at the edge of the lens, and there is a floor gap 8 between it and the metal component 11; there is a feeding gap 4 between the feeding branch 2 and the antenna ground end 3, and it is fixed in the edge area of the lens; the radiation branch 1 is connected to the feeding branch 2 and has a coupling gap with the layer where the metal component 11 is located.

[0108] The radiation stub 1 includes at least a first radiation stub; the first radiation stub includes a first sub-radiation stub 5 and a second sub-radiation stub 6; the first sub-radiation stub 5 is close to the edge of the metal component and is parallel to the metal component, and the first end of the first sub-radiation stub 5 is connected to the feeding stub 2; the first end of the second sub-radiation stub 6 is connected to the second end of the first sub-radiation stub 5, and the second end of the second sub-radiation stub 6 is close to the edge of the metal component and is perpendicular to the edge of the metal component.

[0109] The radiation stub further includes a second radiation stub 7; the second radiation stub 7 is perpendicularly connected to the feeding stub 2 and is connected to the first end of the first sub-radiation stub 5.

[0110] The antenna further includes a coaxial cable 9, which specifically includes a coaxial inner conductor and a coaxial outer conductor. The coaxial inner conductor is connected to the solid metal conductor part of the feeding stub 2; the coaxial outer conductor is connected to the U-shaped ring. The part where the coaxial inner conductor is connected to the feeding stub 2 is the coaxial feeding point 10.

[0111] Another embodiment of the antenna applied to the lens provided in this embodiment has the same effect as the antenna applied to the lens in the above embodiment, and will not be elaborated here.

[0112] The above has introduced in detail an antenna and glasses applied to a lens provided by the present invention. Each embodiment in the specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

[0113] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

Claims

1. An antenna applied to a lens, characterized in that, The antenna includes radiating branches, feeding branches, a metal component, and an antenna ground end; The antenna ground end is located at the edge of the lens and there is a ground gap between it and the metal component; There is a feeding gap between the feeding branch and the antenna ground end, and the feeding branch is fixed in the edge area of the lens; The radiating branch is connected to the feeding branch and there is a coupling gap between it and the layer where the metal component is located. The radiating branch is used to excite the metal component to generate corresponding resonance points within each preset resonance frequency.

2. The antenna applied to a lens according to claim 1, characterized in that, The feeding branch is perpendicular to the plane where the inner side wall of the layer where the metal component is located.

3. The antenna applied to a lens according to claim 2, characterized in that, The radiating branch at least includes a first radiating branch; The first radiating branch includes a first sub-radiating branch and a second sub-radiating branch; The first sub-radiating branch is close to the edge of the metal component and is parallel to the metal component. The first end of the first sub-radiating branch is connected to the feeding branch; The first end of the second sub-radiating branch is connected to the second end of the first sub-radiating branch. The second end of the second sub-radiating branch is close to the edge of the metal component and is perpendicular to the edge of the metal component.

4. The antenna applied to a lens according to claim 3, characterized in that, The radiating branch further includes a second radiating branch; The second radiating branch is perpendicularly connected to the feeding branch and is connected to the first end of the first sub-radiating branch.

5. The antenna applied to a lens according to any one of claims 1 to 4, characterized in that, The antenna ground end, the feeding branch, and the feeding gap together form a coplanar waveguide for feeding.

6. The antenna applied to a lens according to claim 5, characterized in that, The antenna ground end is a U-shaped loop.

7. The antenna applied to a lens according to claim 6, characterized in that, The part of the feeding branch close to the U-shaped loop adopts the structure of a solid metal conductor, and the part close to the radiating branch adopts the structure of a metal grid; And / or, the radiating branch adopts the structure of a metal grid; And / or, the U-shaped loop adopts the structure of a solid metal conductor.

8. The antenna applied to a lens according to claim 3, characterized in that, The first radiating branch is L-shaped and the first sub-radiating branch is arc-shaped.

9. The antenna applied to a lens according to claim 7, characterized in that, It further includes a coaxial inner conductor and a coaxial outer conductor; The coaxial inner conductor is connected to the solid metal conductor part of the feeding branch; The coaxial outer conductor is connected to the U-shaped loop.

10. The antenna applied to a lens according to claim 4, characterized in that, The first radiating branch and the second radiating branch work in a monopole mode to generate different resonance points when corresponding to the first high-frequency resonance frequency and the second high-frequency resonance frequency respectively.

11. The antenna applied to a lens according to claim 1, characterized in that, The metal component is located at the frame for fixing the lens; 12. A pair of glasses, characterized in that, It includes a front frame, a lens, a rear frame, and the antenna applied to the lens according to any one of claims 1 to 11; The antenna is located inside the lens, and the lens and the antenna are located between the front frame and the rear frame.

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