Antenna applied to lens, and glasses

Abstract

Some embodiments of the present application relate to the technical field of communications. Disclosed are an antenna applied to a lens, and glasses. There is a floor gap between an antenna ground terminal and a metal component, there is a feeding gap between a feeding stub and the antenna ground terminal, and there is a coupling gap between a radiation stub and a layer where the metal component is located, such that non-physical connection between an antenna and the metal component is achieved. In addition, the metal component is used as a part of the antenna, and the metal component is excited by means of coupling, such that an antenna loop is formed to achieve the function of the antenna, thereby reducing the electrical length of the radiation stub, and also reducing the conductor loss of metal. The radiation stub excites the metal component at each preset resonance frequency to generate a corresponding resonance point, so as to meet the requirements for a plurality of frequency points, and therefore it is not necessary to form a slit or window on the metal component, thereby maintaining the integrity of glasses, and reducing the antenna design difficulty. The antenna is arranged at the edge of a lens, and the feeding stub is arranged in an edge area of the lens, thereby avoiding being close to the center of the lens, so as not to affect the optical display effect of AR glasses.

Description

Antenna applied to lenses and glasses

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 20, 2023, with application number 202311761640.X and invention name “An antenna and glasses applied to lenses”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of communication technology, and in particular to an antenna applied to lenses and glasses. Background Art

[0003] Among current wearable devices, the temples and frames of augmented reality (AR) glasses are often made of metal. However, metal shields electromagnetic signals. To prevent this from affecting the antenna performance of AR glasses, slits or windows are often created in the temples or frames, resulting in structural incompleteness.

[0004] To improve this situation, an antenna is designed on a transparent lens using a transparent metal grid to realize the antenna function.

[0005] 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 the 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 will be difficult to achieve a reliable physical and electrical connection between the transparent antenna and the metal frame, increasing the difficulty of antenna design.

[0006] Therefore, how to achieve a non-physical connection between the antenna and the metal frame while the glasses structure is intact to reduce the difficulty of antenna design is an urgent problem to be solved by those skilled in the art.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to provide an antenna applied to lenses and glasses to solve the technical problems of incomplete glasses structure, unreliable physical connection and high difficulty in antenna design.

[0009] In order 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 terminal;

[0010] 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;

[0011] There is a feeding gap between the feeding branch and the antenna ground end, and the feeding branch is fixed at the edge area of ​​the lens;

[0012] 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 a corresponding resonance point within each preset resonance frequency.

[0013] Preferably, the feeding branch is perpendicular to the plane of the inner side wall of the layer where the metal component is located.

[0014] Preferably, the radiating branches include at least a first radiating branch;

[0015] The first radiation branch includes a first sub-radiation branch and a second sub-radiation branch;

[0016] The first sub-radiation branch is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiation branch is connected to the feeding branch;

[0017] The first end of the second sub-radiation branch is connected to the second end of the first sub-radiation branch, and the second end of the second sub-radiation branch is close to the edge of the metal component and perpendicular to the edge of the metal component.

[0018] Preferably, the radiating branches further include a second radiating branch;

[0019] The second radiation branch is vertically connected to the feeding branch and is connected to the first end of the first sub-radiation branch.

[0020] Preferably, the antenna ground end, the feeding branch and the feeding slot together constitute a coplanar waveguide for feeding.

[0021] Preferably, the antenna ground end is a U-shaped ring.

[0022] Preferably, the portion of the feeding branch close to the U-shaped ring adopts a solid metal conductor structure, and the portion close to the radiation branch adopts a metal grid structure;

[0023] And / or, the radiation branches adopt a metal grid structure;

[0024] And / or, the U-shaped ring adopts a solid metal conductor structure.

[0025] Preferably, the first radiation branch is L-shaped, and the first sub-radiation branch is arc-shaped.

[0026] Preferably, it further comprises a coaxial inner conductor and a coaxial outer conductor;

[0027] The inner conductor of the coaxial line is connected to the solid metal conductor portion of the feed branch;

[0028] The outer conductor of the coaxial line is connected to the U-shaped ring.

[0029] Preferably, the first radiation branch and the second radiation branch operate 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.

[0030] Preferably, the metal component is located at the frame that fixes the lens.

[0031] In order to solve the above technical problems, the present invention further provides a pair of glasses, comprising a front frame, lenses, a rear frame and the above-mentioned antenna applied to the lenses;

[0032] The antenna is located inside the lens, and the lens and the antenna are located between the front frame and the rear frame.

[0033] The present invention provides an antenna for use with a lens, comprising a radiating branch, a feeding branch, a metal component, and an antenna ground terminal. The antenna ground terminal is located at the edge of the antenna and has a floor gap between it and the metal component. The feeding branch and the antenna ground terminal have a feeding gap and are fixed to the edge of the lens. The radiating branch is connected to the feeding branch and has a coupling gap with the layer where the metal component is located. The radiating branch is used to excite the metal component to produce a corresponding resonance point within each preset resonant frequency. The present invention achieves a non-physical connection between the antenna and the metal component by providing a floor gap between the antenna ground terminal and the metal component, a feeding gap between the feeding branch and the antenna ground terminal, and a coupling gap between the radiating branch and the layer where the metal component is located. At the same time, the metal component is used as part of the antenna to excite the metal component through coupling to form an antenna loop to realize the antenna function, thereby reducing the length of the radiating branch composed of the metal grid, reducing the conductor loss of the metal, and improving the antenna efficiency. Because the radiating branches stimulate the metal components to generate corresponding resonance points within each preset resonant frequency, achieving multiple frequency requirements, there is no need to create slits or windows in the metal components, maintaining the integrity of the glasses, without changing the structure of the glasses, and reducing the difficulty of antenna design. The antenna is placed at the edge of the lens, and the feed branches are located in the edge area of ​​the lens, avoiding proximity to the center of the lens to affect the optical display effect of the AR glasses.

[0034] In addition, the present invention also provides a pair of glasses having the same beneficial effects as the above-mentioned antenna applied to the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only part of the drawings of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0036] FIG1 is a schematic structural diagram of an antenna applied to a lens provided by an embodiment of the present invention;

[0037] FIG2 is a schematic structural diagram of a pair of glasses provided by an embodiment of the present invention;

[0038] FIG3 is a cross-sectional view of an AA-type glasses antenna according to an embodiment of the present invention;

[0039] FIG4 is a front view of an antenna applied to a lens provided by an embodiment of the present invention;

[0040] FIG5 is a simulation S diagram of an antenna applied to a lens loaded with a first radiation branch and a second radiation branch provided by an embodiment of the present invention. 1，1 Schematic diagram of the curve;

[0041] FIG6 is a simulation S diagram of a metal frame and a plastic frame of glasses to which an antenna applied to a lens belongs, provided by an embodiment of the present invention. 1，1 Schematic diagram of the curve;

[0042] FIG7 is a schematic diagram of simulated surface current distribution of an antenna applied to a lens at 2.44 GHz provided by an embodiment of the present invention;

[0043] FIG8 is a schematic diagram of simulated surface current distribution of an antenna applied to a lens at 5.39 GHz provided by an embodiment of the present invention;

[0044] FIG9 is a schematic diagram of simulated surface current distribution at 7.4 GHz of an antenna applied to a lens provided by an embodiment of the present invention;

[0045] FIG10 is a diagram showing 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;

[0046] FIG11 is a schematic diagram of a curve showing how the measured efficiency of an antenna applied to a lens varies with frequency, provided by an embodiment of the present invention;

[0047] FIG12 is a schematic structural diagram of another antenna applied to a lens provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following will describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] The core of the present invention is to provide an antenna applied to lenses and glasses to solve the technical problems of incomplete glasses structure, unreliable physical connection and high difficulty in antenna design.

[0050] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] It should be noted that while creating slits or windows in the metal body ensures the antenna's radiation characteristics, it increases the overall structural design, processing difficulty, and cost. Creating slits or windows allows the antenna to excite new modes, providing new resonant frequencies to reduce the design difficulty of the antenna. Furthermore, with the rapid development of wireless communications, it is difficult to meet user needs with only a single communication method. Mobile communication devices are required to support multiple communication methods, such as Bluetooth, fourth-generation (4G) / fifth-generation (5G), and wireless local area networks (Wi-Fi). Therefore, antennas are required to cover multiple operating frequency bands. However, multi-frequency antennas have complex structures, require many wires, and have a large number of slits or windows, placing high demands on the metal body structure. The antenna for lenses provided by the present invention provides multiple operating frequency bands without the need for slits or windows in the glasses, thereby reducing the design difficulty of the glasses.

[0052] FIG1 is a schematic structural diagram of an antenna applied to a lens according to an embodiment of the present invention. As shown in FIG1 , the antenna includes a radiation branch 1, a feeding branch 2, a metal component, and an antenna ground terminal 3;

[0053] The antenna ground terminal 3 is located at the edge of the lens, and there is a floor gap between it and the metal component;

[0054] There is a feeding gap 4 between the feeding branch 2 and the antenna ground terminal 3, and it is fixed at the edge area of ​​the lens;

[0055] The radiation branch 1 is connected to the feeding branch 2 and has 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 a corresponding resonance point within each preset resonance frequency.

[0056] Specifically, the antenna includes a radiating branch, a feeding branch, a metal component, and an antenna ground. The radiating branch is one of the branches of the antenna structure used to radiate electromagnetic waves, and the feeding branch is an RF circuit structure used to effectively feed the RF signal to the radiating branch. To optimize antenna efficiency and achieve better signal transmission, antenna radiation, and reception, the antenna ground is connected to the edge of the eyeglass lens as a reference ground.

[0057] The antenna and the metal component are on different layers and are arranged at the edge of the glasses. Figure 2 is a schematic diagram of the structure of a pair of glasses provided by an embodiment of the present invention. As shown in Figure 2, the antenna and the metal component are on different layers, the antenna ground terminal is located at the edge of the lens, and there is a floor gap between the antenna and the metal component. The floor gap in this embodiment is based on the gap between the grounding layer of the antenna ground terminal and the metal component. The shape of the antenna ground terminal is not limited here. It can be designed in combination with the curvature of the lens or the shape of the feed branch. It can be concave or other shapes.

[0058] A feed gap exists between the feed branch and the antenna ground terminal, and the feed branch is fixed to the edge of the lens. The feed branch is used to adjust the distance between the antenna and the edge of the metal component to adjust the antenna's impedance matching. The gap between the antenna ground terminal and the feed branch acts as a radiating element, exciting the feed through coupling, radiating energy outward to achieve impedance matching. To minimize interference with the optical display of the glasses, the feed branch is fixed to the edge of the lens.

[0059] The radiating branch is connected to the feeding branch, and there is a coupling gap between the radiating branch and the layer where the metal component is located. Figure 3 is a cross-sectional view of an eyeglass antenna AA provided by an embodiment of the present invention. As shown in Figure 3, the metal component in Figure 3 is located at the frame to form a metal frame. There is a longitudinal coupling gap between the tail of the radiating branch and the metal frame, and the metal frame is stimulated to radiate through the coupling gap. The radiating branch is used to stimulate the metal frame (metal component) to generate a corresponding resonance point within each preset resonant frequency. It should be noted that each preset resonant frequency includes a low-frequency resonant frequency and a high-frequency resonant frequency. The specific frequency value of the corresponding resonant frequency can be set according to actual conditions. By adjusting the length and width of the radiating branch, the coupling strength between the radiating branch and the metal frame (metal component) is adjusted to achieve impedance matching. There is no requirement for the length and width of the radiating branch here, and it can be set based on actual conditions.

[0060] The antenna applied to the lens in this embodiment can be based on a film as a carrier, and the radiation branch, feeding branch and antenna ground end are attached to the carrier. The film can be an S-PET film, which is transparent and colorless, has high heat resistance, and allows low-temperature reflow soldering. The various components of the antenna applied to the lens in this embodiment are adhered to the lens through an optically clear adhesive (OCA), and the thickness of the film can be 100um.

[0061] It should be noted that the metal component in this embodiment can be a formed metal layer, or it can be an embodiment corresponding to the metal frame in Figures 2 and 3. Specifically, the metal component is located at the frame that fixes the lens to form a metal frame. It can also be a layer of metal paint plated on the frame to achieve conductive properties. Therefore, the corresponding frame of the glasses can be a frame made of metal material or a frame made of plastic material, which is not limited here. If it is a frame made of metal material, the metal component of the present invention is a metal frame. If it is a frame made of plastic material, its metal component can be a metal layer, or metal paint plated on a metal frame made of plastic material, etc., which can be set according to actual conditions.

[0062] An embodiment of the present invention provides an antenna for use with a lens, the antenna comprising a radiating branch, a feeding branch, a metal component, and an antenna ground terminal; the antenna ground terminal is located at the edge of the antenna and has a floor gap between it and the metal component; the feeding branch and the antenna ground terminal have a feeding gap and are fixed to the edge area of ​​the lens; the radiating branch is connected to the feeding branch and has a coupling gap with the layer where the metal component is located, and the radiating branch is used to excite the metal component to produce a corresponding resonance point within each preset resonant frequency. The present invention achieves a non-physical connection between the antenna and the metal component by having a floor gap between the antenna ground terminal and the metal component, a feeding gap between the feeding branch and the antenna ground terminal, and a coupling gap between the radiating branch and the layer where the metal component is located. At the same time, the metal component is used as part of the antenna, and the metal component is excited by coupling to form an antenna loop to realize the function of the antenna, thereby reducing the length of the radiating branch composed of the metal grid, reducing the conductor loss of the metal, and improving the antenna efficiency. Because the radiating branches stimulate the metal components to generate corresponding resonance points within each preset resonant frequency, achieving multiple frequency requirements, there is no need to create slits or windows in the metal components, maintaining the integrity of the glasses, without changing the structure of the glasses, and reducing the difficulty of antenna design. The antenna is placed at the edge of the lens, and the feed branches are located in the edge area of ​​the lens, avoiding proximity to the center of the lens to affect the optical display effect of the AR glasses.

[0063] In some embodiments, the feeding branch is perpendicular to the plane of the inner sidewall of the layer where the metal component is located.

[0064] The feed branch, as shown in Figure 2, is located perpendicular to the edge of the lens, where the lens, metal frame, and temples intersect. This feed branch is primarily used to adjust the distance between the lens antenna and the edge of the metal frame, thereby controlling the coupling strength between the entire lens antenna and the metal frame to adjust the impedance matching of the lens antenna. The coupling degree in this embodiment represents the coupling strength.

[0065] Based on the above embodiment, the radiating branches include at least a first radiating branch;

[0066] The first radiation branch includes a first sub-radiation branch and a second sub-radiation branch;

[0067] The first sub-radiation branch is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiation branch is connected to the feeding branch;

[0068] The first end of the second sub-radiation branch is connected to the second end of the first sub-radiation branch. The second end of the second sub-radiation branch is close to the edge of the metal component and is perpendicular to the edge of the metal component.

[0069] As shown in Figure 2, since the radiating branches adjust the various resonant frequencies of the antenna, the number of corresponding radiating branches is not limited. In this embodiment, at least a first radiating branch is included. The first radiating branch adjusts different resonant frequencies based on its shape. The first radiating branch includes a first sub-radiating branch and a second sub-radiating branch. The first sub-radiating branch is located near the edge of the metal frame and is parallel to the metal frame. It is used to adjust the low-frequency resonant frequency and the first high-frequency resonant frequency of the antenna.

[0070] Figure 4 is a front view of an antenna applied to a lens provided by an embodiment of the present invention. As shown in Figure 4, the first end of the first radiating branch is connected to the feeding branch, specifically the extension direction of the feeding branch. The first radiating branch is used to adjust the low-frequency resonant frequency and the first high-frequency resonant frequency of the antenna, and it mainly adjusts the length of the first radiating branch to adjust the frequency.

[0071] The first end of the second sub-radiation branch 6 is connected to the second end of the first sub-radiation branch 5, and the second end of the second sub-radiation branch 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-radiation branch is close to the edge of the metal frame, or it can be deep inside the frame, or there can be a certain coupling gap between the metal frame and the metal frame, so as to play the role of coupling and exciting the metal frame to generate a low-frequency resonance point. The metal frame is stimulated 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 achieve a miniaturized design of the glasses antenna. The width of the coupling gap affects the coupling strength between the second sub-radiation branch and the metal frame, and the optimal performance of the antenna is achieved by optimizing the width of the coupling gap. In addition, the width of the corresponding coupling gap is not limited, and can be 1.25 mm or other width specifications.

[0072] In some embodiments, the radiating branches further include a second radiating branch 7;

[0073] The second radiation branch 7 is vertically connected to the feeding branch 2 and is connected to the first end of the first sub-radiation branch 5 .

[0074] Specifically, the second radiating branch is perpendicularly connected to the feed branch, located at an extension of the feed branch, and connected to the first end of the first radiating branch. It is located in an upper portion of the antenna in an opposite direction of extension of the first radiating branch and is used to adjust the second high-frequency resonant frequency of the antenna to generate a high-frequency resonance point. In this embodiment, the second high-frequency resonant frequency is adjusted by adjusting the length of the second radiating branch.

[0075] Based on the above 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 lens display area, are less noticeable to the human eye, and have less impact on the optical properties of the lens.

[0076] In some embodiments, the shape of the first radiating branch is defined as L-shaped, and the first sub-radiating branch is arc-shaped.

[0077] The L-shape includes a first sub-radiating branch and a second sub-radiating branch. The L-shape of the first sub-radiating branch is vertical and has an arc-shaped design. This is mainly because 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.

[0078] 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 broadband requirements without the need for opening windows or slits in the glasses.

[0079] On the basis of the above embodiment, 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 between the antenna ground terminal and the metal component through the floor gap, 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 through 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, making the metal component a part of the antenna.

[0080] In some embodiments, the antenna ground terminal is a U-shaped loop.

[0081] The antenna ground terminal is specifically designed as a U-shaped ring. By adjusting the width between the U-shaped ring and the feed slot, as well as the length of the U-shaped ring, the impedance matching of the antenna applied to the lens can be adjusted. The U-shaped ring provided in this embodiment adjusts the coupling strength by adjusting its shape, length, and the width between the U-shaped ring and the feed branch.

[0082] In some embodiments, the portion of the feeding branch close to the U-shaped ring adopts a solid metal conductor structure, and the portion close to the radiation branch adopts a metal grid structure;

[0083] And / or, the radiating branches adopt a metal grid structure;

[0084] And / or, the U-shaped ring adopts a structure of a solid metal conductor.

[0085] Specifically, the feed branch utilizes a hybrid metal mesh material. Specifically, the portion near the U-shaped ring utilizes a solid metal conductor (pure metal) structure, while the portion near the radiating branch utilizes a metal mesh structure. The pure metal portion is hidden within the frame. While an ideal antenna doesn't consider a feed point, to extract the signal, the extraction point serves as the feed point. In this embodiment, the feed directly utilizes a solid metal conductor structure as the feed point.

[0086] A metal grid structure is adopted. Since the metal grid has conductor loss, the conductor loss of pure metal is small and can be ignored. The area of ​​the metal grid is reduced as much as possible, and a pure metal structure is adopted in places that are not visible to the human eye, that is, the U-shaped ring adopts a solid metal conductor structure, and the part of the feeding branch close to the U-shaped ring adopts a solid metal conductor (pure metal) structure; a transparent metal grid is adopted in places that are visible to the human eye, that is, the radiating branch adopts a metal grid structure, and the part of the feeding branch close to the radiating branch adopts a metal grid structure.

[0087] In addition, there are no restrictions on the mesh specifications of the metal mesh. The mesh specifications can be 10μm line width, 0.5μm line thickness, and 100μm line spacing. Line width refers to the width of each line, line thickness refers to the thickness of each line, and line spacing refers to the distance between each line. Other parameters are also possible and are not limited here. You can set them according to your actual needs.

[0088] In this embodiment, the metal structures corresponding to the feeding branches, the radiating branches, and the U-shaped ring are limited by adopting and / or methods, thereby achieving diversity in the metal structures of each branch and the U-shaped ring.

[0089] The metal grid structure provided in this embodiment has conductor loss in the metal grid. The coupling gap formed between the tail of the second sub-radiating branch and the metal frame excites the metal frame through coupling, thereby forming a low-frequency loop antenna. At the same time, the electrical length of the antenna is reduced, the conductor loss of the metal grid is reduced, and the efficiency of the antenna applied to the lens is improved.

[0090] In some embodiments, the antenna applied to the lens further includes a coaxial inner conductor and a coaxial outer conductor;

[0091] The inner conductor of the coaxial line is connected to the solid metal conductor portion of the feed branch;

[0092] The outer conductor of the coaxial line is connected to the U-shaped ring.

[0093] Specifically, as shown in Figure 2, the inner conductor of the coaxial cable is located within the feed branch, spanning the solid metal conductor portion and the metal mesh portion, and is connected by low-temperature welding. The outer conductor of the coaxial cable is connected to the U-shaped ring by low-temperature welding. The coaxial cable serves to feed the antenna, and the corresponding coaxial feeding point is located at the solid metal conductor portion of the feed branch. It is understood that the corresponding connection method in this embodiment can be low-temperature welding or other welding methods, which are not limited here and can be set according to actual conditions.

[0094] In some embodiments, the first radiation branch and the second radiation branch operate 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.

[0095] FIG5 is a simulation S diagram of an antenna applied to a lens loaded with a first radiation branch and a second radiation branch provided by an embodiment of the present invention. 1，1 The schematic diagram of the curve is shown in Figure 5. When only the first radiating branch is loaded, the antenna has resonance points at 2.45GHz and 7GHz, corresponding to low-frequency resonance point 1 and high-frequency resonance point 2 respectively. When only the second radiating branch is loaded, the antenna has a resonance point at 5GHz, corresponding to high-frequency resonance point 1. When the first radiating branch (radiating branch 1) and the second radiating branch (radiating branch 2) are loaded at the same time, the antenna has resonance points within the three resonance frequencies mentioned above. The antenna applied to the lens can be combined with the metal frame to form a multi-mode antenna, realizing a broadband design of the antenna, and avoiding the use of window or slit designs for the glasses, reducing the difficulty and cost of the overall structural design and processing, and ensuring the integrity and aesthetics of the glasses.

[0096] FIG6 is a simulation S diagram of a metal frame and a plastic frame of glasses to which an antenna applied to a lens belongs, provided by an embodiment of the present invention. 1，1The schematic diagram of the curve is shown in Figure 6. When a plastic front frame is used, the antenna is a quarter-wavelength monopole with a resonant frequency of 3.25 GHz. Compared with a metal front frame, the low-frequency resonant frequency of the antenna moves from 2.45 GHz to a high frequency of 3.25 GHz. Figure 7 is a schematic diagram of the simulated surface current distribution of an antenna applied to a lens at 2.44 GHz provided by an embodiment of the present invention. As shown in Figure 7, compared with a plastic front frame, after using a metal frame, the first radiating branch forms a quarter-wavelength loop antenna with the metal front frame through a coupling gap, rather than a monopole mode of a plastic front frame. This implementation method cleverly uses the metal frame as part of the antenna, extends the electrical length of the first radiating branch, and realizes a miniaturized design of the antenna.

[0097] FIG8 is a schematic diagram of the simulated surface current distribution of an antenna applied to a lens at 5.39 GHz provided by an embodiment of the present invention. As shown in FIG8 , the current is mainly concentrated in the second radiation branch, which works as a quarter-wavelength monopole, which is different from the S when only the second radiation branch is loaded as shown in FIG5 . 1，1 The curves correspond to each other.

[0098] FIG9 is a schematic diagram of the simulated surface current distribution of an antenna applied to a lens at 7.4 GHz provided by an embodiment of the present invention. As shown in FIG9 , the surface current is concentrated in the radiation branch 1, which works as a half-wavelength monopole, which is different from the S when only the first radiation branch is loaded as shown in FIG5 . 1，1 The curves correspond to each other.

[0099] Therefore, the first radiation branch and the second radiation branch operate 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, thereby realizing the function of a multi-mode antenna.

[0100] As shown in FIG1 , the present invention further provides a pair of glasses, comprising a front frame, lenses, a rear frame, and the antenna applied to the lenses in the above embodiment;

[0101] The antenna is located on the inside of the lens, and the lens and the antenna are located between the front frame and the rear frame.

[0102] Specifically, the antenna is located on the inside of the lens and is pasted on the lens. The material of the lens can be PC material, and the lens is the antenna medium substrate. The lens and the transparent antenna are located between the front frame and the rear frame, and are fixed in the frame through the front and rear frames.

[0103] For an introduction to the glasses provided by the present invention, please refer to the above method embodiment, and the present invention will not be described in detail here. It has the same beneficial effects as the above-mentioned antenna applied to the lens.

[0104] FIG10 is a diagram showing the measured S of an antenna applied to a lens provided by an embodiment of the present invention. 1，1The curve diagram of the frequency change is shown in Figure 10. 1，1 The operating frequency bands with a tolerance of ≤-10dB are 1.75GHz-2.56GHz and 4.57GHz-7.2GHz. Figure 8 also shows the test results of a pure metal antenna with the same structure and size. Compared with pure metal antennas, the transparent antenna of the present invention has basically the same performance. In addition, compared with traditional terminal antennas such as loops, dipoles, and monopoles, this antenna has a simpler structure and a wider bandwidth. The operating frequency bands required by the Wi-Fi 6E / 7 protocol are 2.4GHz (802.11b / g, frequency range 2.400GHz to 2.4835GHz), 5GHz (802.11a, frequency range 5.150GHz to 5.825GHz) and 6E (802.11ax, frequency range 5.925GHz to 7.125GHz). The operating frequency bands of the antenna designed in this invention can cover mobile communication frequency bands such as Wi-Fi 6e / 7, namely, the 2.4GHz band (2.4-2.485GHz), the 5GHz band (5.15-5.85GHz) and the 6GHz band (5.925-7.125GHz), meeting the requirements of Wi-Fi 7 for antenna operating frequency bands.

[0105] FIG11 is a schematic diagram of a curve showing the variation of the measured efficiency of an antenna applied to a lens as a function of frequency, provided by an embodiment of the present invention. As shown in FIG11 , for mobile terminal products with multi-band Wi-Fi, the antenna efficiency is generally required to be greater than -5dB. In the embodiment of the present invention, the antenna efficiency is -1.70dB to -1.97dB in the 2.38GHz-2.5GHz frequency band; and -1.33dB to -3.12dB in the 5.05GHz-7.25GHz frequency band, which is much higher than the communication index requirements. In addition, based on the test results of a pure metal antenna with the same structure and size, the efficiency loss of the transparent antenna is only within 0.65dB compared to the pure metal antenna. The antenna of the present invention has higher efficiency than the traditional transparent antenna.

[0106] The transparent antenna of the present invention does not occupy the internal space of the glasses, does not require slots or windows in the glasses' outer shell, and does not require any form of physical connection to the metal shell. Its simple structure and ease of implementation ensure the integrity and aesthetics of the AR glasses while reducing their size. The antenna applied to the lenses of the present invention allows the glasses to use metal frames without changing the metal shell structure, reducing the difficulty and cost of overall structural design and processing while ensuring the integrity and aesthetics of the metal frame.

[0107] The transparent antenna of this invention is designed along the outer edge of the frame, away from the center of the human eye, making it extremely difficult for the human eye to detect. Furthermore, the optical display area of ​​AR glasses corresponds to the center of the human eye, so the antenna of this invention is also away from the optical display area, preserving the original optical properties of the AR glasses' optical waveguide as much as possible.

[0108] The antenna structure applied to the lens is compact, and only the peripheral space of the lens is used for the antenna design. As a visual organ, the human eye has an observation range of plus or minus 60 degrees horizontally and plus or minus 40 degrees vertically. In addition, as the angle expands, the human eye's vision also decreases rapidly. For example, when the horizontal angle reaches 60 degrees, the human eye's vision drops to less than one-tenth of 0 degrees. This means that although the human eye can see objects within a wide angle range, the clarity will be greatly reduced. As shown in Figure 4, 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, away from the center of the human eye, so the antenna of the present invention is extremely difficult to be perceived by the human eye. At the same time, the optical display area of ​​the AR glasses corresponds to the center of the human eye. Therefore, the antenna of the present invention is also far away from the optical display area, preserving the original optical properties of the AR glasses' optical waveguide as much as possible.

[0109] Figure 12 is a schematic diagram of the structure of another antenna for use with eyeglasses, provided by an embodiment of the present invention. As shown in Figure 12, the metal component corresponding to the antenna is a metal frame, which is located on the front frame of the glasses (metal front frame). The antenna includes a radiating branch 1, a feeding branch 2, a metal component 11, and an antenna ground terminal 3. The antenna ground terminal 3 is located at the edge of the lens and has a floor gap 8 between it and the metal component 11. A feeding gap 4 is formed between the feeding branch 2 and the antenna ground terminal 3, and the antenna is fixed to the edge of the lens. The radiating branch 1 is connected to the feeding branch 2 and has a coupling gap with the layer where the metal component 11 is located.

[0110] The radiating branch 1 includes at least a first radiating branch; the first radiating branch includes a first sub-radiating branch 5 and a second sub-radiating branch 6; the first sub-radiating branch 5 is close to the edge of the metal component and parallel to the metal component, and the first end of the first sub-radiating branch 5 is connected to the feeding branch 2; the first end of the second sub-radiating branch 6 is connected to the second end of the first sub-radiating branch 5, and the second end of the second sub-radiating branch 6 is close to the edge of the metal component and perpendicular to the edge of the metal component.

[0111] The radiation branch further includes a second radiation branch 7 ; the second radiation branch 7 is vertically connected to the feeding branch 2 and is connected to the first end of the first sub-radiation branch 5 .

[0112] The antenna also includes a coaxial line 9, which specifically includes an inner coaxial conductor and an outer coaxial conductor. The inner coaxial conductor is connected to the solid metal conductor portion of the feed branch 2; the outer coaxial conductor is connected to the U-shaped ring. The portion where the inner coaxial conductor connects to the feed branch 2 is a coaxial feed point 10.

[0113] 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 described in detail here.

[0114] The above is a detailed introduction to an antenna and glasses applied to lenses provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various 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 method part description. It should be pointed out that for ordinary technicians 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 scope of protection of the present invention.

[0115] Those skilled in the art will also understand that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition and steps of each example according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0116] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0117] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. An antenna applied to a lens, characterized in that: The antenna comprises a radiation branch, a feeding branch, a metal component and an antenna ground terminal; 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; There is a feeding gap between the feeding branch and the antenna ground end, and the feeding branch is fixed at 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 a corresponding resonance point 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 is located.

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

4. The antenna applied to a lens according to claim 3, characterized in that: The radiating branches also include second radiating branches; The second radiation branch is vertically connected to the feeding branch and is connected to the first end of the first sub-radiation 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 slot 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 ring.

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 ring adopts a solid metal conductor structure, and the part close to the radiation branch adopts a metal grid structure; And / or, the radiation branches adopt a metal grid structure; And / or, the U-shaped ring adopts a structure of a solid metal conductor.

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

9. The antenna applied to a lens according to claim 7, characterized in that: Also includes a coaxial line inner conductor and a coaxial line outer conductor; The inner conductor of the coaxial line is connected to the solid metal conductor portion of the feed branch; The outer conductor of the coaxial line is connected to the U-shaped ring.

10. The antenna applied to a lens according to claim 4, characterized in that: The first radiation branch and the second radiation branch operate 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 that fixes the lens.

12. A pair of glasses, characterized in that: It comprises a front frame, a lens, a rear frame and an antenna applied to the lens as claimed in 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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