Glasses and lens antenna thereof

Abstract

Disclosed in the present application are glasses and a lens antenna thereof, which are applied to the technical field of communications. The lens antenna is arranged in the glasses and comprises: a feed sheet, used for performing excitation feed in a first frequency band, so as to excite an annular part to generate a first resonance point; and an annular part, a capacitive coupling gap being present between the annular part and the feed sheet, the annular part being arranged around a lens edge, a gap being provided in a designated position of the annular part, and the feed sheet being fixed in a lens edge area. Applying the solution of the present application has little impact on optical characteristics, which helps to ensure the visual effects of users. In addition, for lenses of different sizes, the lens antenna of the present application can conveniently reach required first resonance points.

Description

Glasses and lens antenna thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 7, 2023, with application number 202310988383.7 and invention name “A kind of glasses and their lens antenna”, 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 a pair of glasses and a lens antenna thereof. Background Art

[0003] Some current AR (Augmented Reality) glasses are equipped with transparent lens antennas, which are antennas designed on transparent lenses using transparent metals such as metal mesh. This solution can achieve the function of an antenna without taking up additional space.

[0004] However, transparent metal materials such as metal grids and indium tin oxide are not completely transparent. That is, the transparent metal material located in the middle of the transparent lens will still affect the optical properties of the lens to a certain extent, thereby affecting the visual effect of users using AR glasses.

[0005] In addition, transparent metal materials affect the transmittance of the lens. The higher the transmittance of transparent metal materials, the less noticeable they are to the human eye, but the higher the metal loss, the lower the efficiency of the antenna. Metal grids are a low-cost and widely used implementation method. To improve the conductivity of the metal grid and ensure antenna efficiency, reducing the spacing between grid lines is a common method, but this may cause light diffraction. That is, as the spacing becomes smaller, when light passes through the metal grid, diffraction occurs, resulting in dark spots or dark lines, causing the image seen by the user to be blurred.

[0006] In summary, how to effectively design lens antennas to ensure the user's visual effect is a technical problem that technical personnel in this field urgently need to solve.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to provide a pair of glasses and a lens antenna thereof, so as to effectively design the lens antenna and ensure the visual effect of the user.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A lens antenna is provided in glasses, and the lens antenna comprises:

[0011] A feeding plate, used for performing excitation feeding in a first frequency band to excite the ring ground to generate a first resonance point;

[0012] The annular ground having a capacitive coupling gap with the feeding plate;

[0013] The annular ground is arranged around the edge of the lens, and a gap is provided at a designated position of the annular ground. The feeding plate is fixed on the edge area of ​​the lens.

[0014] In one embodiment, the feeding plate is further configured to generate a second resonance point when operating as a monopole in a second frequency band.

[0015] In one embodiment, the feed plate is a strip-shaped feed plate, and one end of the feed plate is located at the side edge area of ​​the lens, and the other end extends along the side of the lens toward the bottom of the lens.

[0016] In one embodiment, the portion of the feed plate located in the side edge area of ​​the lens adopts a solid metal conductor structure, and the portion of the feed plate extending along the side of the lens toward the bottom of the lens adopts a transparent metal grid structure.

[0017] In one embodiment, it further includes:

[0018] a first matching branch connected to the feed plate and arranged in an extending direction of the feed plate;

[0019] The first matching branch adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens. The first matching branch is used to perform impedance matching in the first frequency band.

[0020] In one embodiment, it further includes:

[0021] a second matching branch connected to the feed plate and arranged in a direction perpendicular to the extension direction of the feed plate;

[0022] The second matching branch adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens, and the second matching branch is used to perform impedance matching in the second frequency band;

[0023] The feeding plate is further configured to generate a second resonance point when operating as a monopole in the second frequency band.

[0024] In one embodiment, it further includes:

[0025] a first capacitor-loaded branch connected to the annular ground and used for tuning the first resonance point;

[0026] The first capacitor loading branch adopts a transparent metal grid structure, and the first capacitor loading branch is in a long strip shape and is fixed to the side edge area of ​​the lens.

[0027] In one embodiment, it further includes:

[0028] a second capacitor-loaded branch connected to the annular ground and the first capacitor-loaded branch and configured to tune the first resonance point;

[0029] The second capacitor loading branch adopts a transparent metal grid structure, and the second capacitor loading branch is long and strip-shaped and fixed to the bottom edge area of ​​the lens;

[0030] The width of the second capacitor loading branch is greater than the width of the first capacitor loading branch;

[0031] Among them, the length direction of the first capacitor loading branch represents the extension direction of the first capacitor loading branch, and the width direction of the first capacitor loading branch is perpendicular to the length direction of the first capacitor loading branch; the length direction of the second capacitor loading branch represents the extension direction of the second capacitor loading branch, and the width direction of the second capacitor loading branch is perpendicular to the length direction of the second capacitor loading branch.

[0032] In one embodiment, a gap is provided at a designated position on the bottom of the annular ground, and a gap is provided at the same position on the second capacitor loading branch.

[0033] A pair of glasses comprising the lens antenna as described above.

[0034] In applying the technical solutions provided by the embodiments of the present invention, the present application takes into account that the human eye, as a visual organ, typically has a range of observation of plus or minus 60 degrees horizontally and plus or minus 40 degrees vertically, and that as the angle of vision increases, the human eye's vision rapidly decreases. This means that although the human eye can see objects within a wide angle range, the clarity is greatly reduced. The lens antenna in the present application's solution is positioned as far away from the optical display area as possible, allowing the present application's solution to preserve the original optical properties of the lens as much as possible, effectively ensuring the user's visual experience.

[0035] Specifically, in the solution of this application, the annular ground plane is set around the edge of the lens, which will not affect the optical properties of the lens. A capacitive coupling gap exists between the annular ground plane and the feed plate, and the feed plate can be excited and fed in the first frequency band to stimulate the annular ground plane to produce a first resonance point. It can be seen that the function of the lens antenna can be realized through the feed plate and the annular ground plane. The feed plate of this application is also fixed to the edge area of ​​the lens, which has little effect on the optical properties of the lens, which is beneficial to ensuring the user's visual effect.

[0036] Furthermore, this application considers that conventional designs utilize the entire lens area for lens antenna design because this allows for easy adjustment of the shape, size, and position of various components, enabling the designed lens antenna to easily achieve the desired resonance point. However, in this application's solution, the annular ground plane must be placed around the lens edge, and the feed plate must also be fixed to the edge of the lens. Furthermore, this application considers that different lens sizes require different users, resulting in varying annular ground plane lengths. Therefore, to ensure that the lens antenna of this application achieves the desired resonance point, this application's solution incorporates gaps at designated locations within the annular ground plane. The location of these gaps affects the value of the first resonance point. In other words, even when the annular ground plane lengths vary depending on the lens size, this application's solution can adapt. By selecting the appropriate designated locations within the annular ground plane to provide the gaps, the lens antenna of this application can still achieve the desired first resonance point, ensuring flexibility. In summary, the lens antenna of this application has minimal impact on the optical properties of the lens, effectively ensuring the user's visual experience. Furthermore, the lens antenna of this application can easily achieve the desired first resonance point for lenses of varying sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] FIG1 is a schematic structural diagram of a lens antenna in the present invention;

[0039] FIG2 is a schematic structural diagram of a lens antenna in a specific embodiment of the present invention.

[0040] FIG3 is a comparative diagram of a specific embodiment in which the first matching branch is not added and the first matching branch is added;

[0041] FIG4 is a front view of a lens antenna in a specific embodiment of the present invention;

[0042] FIG5 is a schematic diagram showing how the return loss of a lens antenna and a classic pure metal antenna varies with frequency in a specific embodiment of the present invention;

[0043] FIG6 is a schematic diagram showing how the efficiency of a lens antenna and a classic pure metal antenna varies with frequency in a specific embodiment of the present invention;

[0044] FIG. 7 is an exploded view of glasses in a specific embodiment. DETAILED DESCRIPTION

[0045] The core of the present invention is to provide a lens antenna that has minimal impact on optical properties, helping to ensure the user's visual experience. Furthermore, for lenses of different sizes, the lens antenna of the present application can easily reach the required first resonance point.

[0046] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0047] Please refer to FIG1 , which is a schematic structural diagram of a lens antenna according to the present invention. The lens antenna is provided in glasses and includes:

[0048] The feeding plate 10 is used for performing excitation feeding in a first frequency band to excite the annular ground 20 to generate a first resonance point;

[0049] An annular ground 20 having a capacitive coupling gap with the feed plate 10;

[0050] The annular ground 20 is disposed around the edge of the lens, and a gap is provided at a designated position of the annular ground 20 . The feeding plate 10 is fixed to the edge area of ​​the lens.

[0051] Specifically, in the solution of the present application, in the first frequency band, the feed plate 10 can play the role of excitation feeding. The first frequency band is usually a low frequency band, that is, the feed plate 10 can play the role of exciting the ring ground 20 to generate a low-frequency resonance point. The specific frequency range corresponding to the first frequency band can be set and adjusted as needed. For example, it is usually in the frequency range of 2GHz to 2.5GHz. Similarly, the specific value of the first resonance point can be set and adjusted according to actual needs, but it can be understood that the frequency value of the first resonance point should fall within the first frequency band.

[0052] The shape and size of the feed plate 10 can be set and adjusted according to actual needs, for example, it can be set to a rectangular shape, or it can be set to an arc shape. It should be emphasized that in order to reduce the impact on the optical characteristics of the lens and ensure the user's visual effect, the feed plate 10 should be fixed to the edge area of ​​the lens.

[0053] The feed sheet 10 is fixed to the edge area of ​​the lens. There are many specific ways to fix it. For example, the feed sheet 10 can be pressed against the surface of the lens using a frame. For example, a groove can be specially provided in the lens for the feed sheet 10 to be placed. Of course, in practical applications, the most convenient way to fix it is by gluing. And because the annular ground 20 also needs to be fixed, in practical applications, the annular ground 20 and the feed sheet 10 are usually fixed to the corresponding positions of the lens by gluing.

[0054] For example, in a specific scenario, an S-PET film with a thickness of 100um is used to achieve gluing, that is, one side of the S-PET film has glue and can be pasted on the lens, while the other side is used to attach the feeding plate 10 and the annular ground 20. Similarly, the first matching branch 30, the second matching branch 40, the first capacitor loading branch 50 and the second capacitor loading branch 60 described in the following embodiments can all be attached to the corresponding positions of the S-PET film, thereby being fixed at the corresponding positions of the lens through the S-PET film.

[0055] S-PET film is transparent and colorless, and will not affect the optical properties of the lens. In addition, S-PET film has high heat resistance and has the advantage of being able to allow low-temperature reflow soldering.

[0056] The annular ground 20 of the present application is used to couple with the feeding plate 10. In the first frequency band, the annular ground 20 can generate a first resonance point through the excitation feeding of the feeding plate 10. The gap between the annular ground 20 and the feeding plate 10 is referred to as a capacitive coupling gap in the present application.

[0057] In order not to affect the optical properties of the lens, the annular ground 20 is set around the edge of the lens. Therefore, it can be understood that the shape of the annular ground 20 is roughly consistent with the shape of the lens edge. It should also be noted that when the annular ground 20 is set around the edge of the lens, the plane where the annular ground 20 is located can be parallel to or coincide with the plane where the lens is located. For example, in the above scenario, the feed plate 10, the annular ground 20 and other components are all attached to the S-PET film, and the S-PET film is pasted on the lens. In this scenario, the feed plate 10, the annular ground 20 and other components are in the same plane, which is also the plane where the annular ground 20 is located, and this plane is parallel to the plane where the mirror surface is located. In some cases, it can also be set so that the plane where the annular ground 20 is located coincides with the plane where the lens is located, which is equivalent to the annular ground 20 being set around the thickness surface of the lens. In actual applications, a more convenient implementation method is the aforementioned implementation method using S-PET film gluing.

[0058] The length of the annular ground 20 will affect the value of the first resonance point, and it is understandable that different users may need glasses of different sizes, and different sizes of glasses also mean different lengths of the annular ground 20. In this regard, in order to enable the lens antenna of the present application to reach the required resonance point, the present application sets a gap at a specified position of the annular ground 20. The position of the gap is different, which will correspondingly affect the value of the first resonance point. In other words, when the length of the annular ground 20 is different due to different sizes of lenses, the solution of the present application can be set by selecting a suitable specified position of the annular ground 20 to set a gap, so that the lens antenna of the present application can still reach the required first resonance point.

[0059] In practical applications, the feed plate 10 is usually arranged in the side edge area of ​​the lens. At this time, when a gap is set at the bottom position of the annular ground 20, it will have a greater impact on the first resonance point. Therefore, in the embodiment of Figure 1, a gap is set at the bottom position of the annular ground 20 to achieve the adjustment of the first resonance point, that is, by selecting the gap position, the first resonance point reaches an ideal value.

[0060] In addition, in addition to the position of the gap affecting the first resonance point, the width of the gap will also have a certain impact on the first resonance point, but the impact of the gap width is lower than the impact of the position. Therefore, in actual applications, after determining the length of the annular ground 20, the setting of the gap position is equivalent to achieving a coarse adjustment effect of the first resonance point, and the setting of the gap width is equivalent to achieving a fine adjustment effect of the first resonance point. Of course, in the implementation methods described below, the adjustment of the first resonance point can also be achieved in conjunction with other implementation methods.

[0061] In a specific embodiment of the present invention, the feeding plate 10 can also be used to generate a second resonance point when operating as a monopole in a second frequency band.

[0062] This implementation takes into account the rapid development of wireless communications, making it difficult for a single communication method to meet user needs. Mobile communication devices often require multiple communication capabilities, such as high-band Wi-Fi communication, low-band Wi-Fi communication, Bluetooth communication, and 4G / 5G communication. This requires antennas that can cover multiple operating frequency bands.

[0063] As an emerging mobile communication device, AR glasses also need to have broadband communication capabilities in some situations to meet different communication function requirements. In traditional solutions, multi-mode antenna solutions are usually adopted. For example, most of them use a combination of dipole / monopole / loop antennas of different lengths to produce multiple operating frequency bands or broadband effects. However, the existing broadband antenna structure is relatively complex, and its efficiency is low when used as a transparent lens antenna. It also has a significant impact on optical properties and is easily noticed by users, reducing the user experience.

[0064] In this embodiment of the present application, in addition to being used to excite the annular ground 20 to generate a first resonance point, the feed plate 10 itself can also operate in the second frequency band to generate a second resonance point, that is, the feed plate 10 is used as a monopole at this time, which not only improves the bandwidth but also does not increase the structural complexity. Therefore, the shortcomings of the traditional solution of affecting optical characteristics and reducing antenna efficiency will not occur.

[0065] The second frequency band is usually a high frequency band, that is, the feed plate 10 can operate as a monopole in the high frequency band. The specific frequency range corresponding to the second frequency band can be set and adjusted as needed, for example, it is usually in the frequency range of 5 GHz to 7 GHz. Similarly, the specific value of the second resonance point can be set and adjusted according to actual needs, but it is understood that the frequency value of the second resonance point should fall within the second frequency band.

[0066] In a specific embodiment of the present invention, the feeding plate 10 is a strip-shaped feeding plate 10, and one end of the feeding plate 10 is located in the side edge area of ​​the lens, and the other end extends along the side of the lens toward the bottom of the lens.

[0067] When the feeding plate 10 serves as an excitation source and performs excitation feeding in the first frequency band, the first resonance point is mainly determined by the length of the annular ground 20 , and the feeding plate 10 can play a role in impedance matching.

[0068] In order for the feed plate 10 to achieve an ideal impedance matching effect, the feed plate 10 should generally not be too short, and as described above, the feed plate 10 needs to be fixed at the edge area of ​​the lens, that is, the position requirement of the feed plate 10 will limit the shape of the feed plate 10. Therefore, in this embodiment, a strip-shaped feed plate 10 is selected, and one end of the feed plate 10 is located at the side edge area of ​​the lens, and the other end extends along the side of the lens toward the bottom of the lens, so that the feed plate 10 can have a certain length, and because it starts from the side edge area of ​​the lens and extends along the side of the lens toward the bottom of the lens, the optical properties of the lens are affected very little, that is, it can meet the requirement that the feed plate 10 needs to be fixed at the edge area of ​​the lens.

[0069] In the embodiments of FIG1 and FIG2 below, the feed strip 10 is a strip-shaped feed strip 10, with one end of the feed strip 10 located at the side edge of the lens and the other end extending along the side of the lens toward the bottom of the lens. For example, in one embodiment, the length of the feed strip 10 can be 15 mm.

[0070] Furthermore, in a specific embodiment of the present invention, referring to FIG2 , the portion of the feed plate 10 located in the side edge area of ​​the lens adopts a solid metal conductor structure, and the portion of the feed plate 10 extending along the side of the lens toward the bottom of the lens adopts a transparent metal grid structure.

[0071] This embodiment takes into account that the portion of the feed plate 10 located in the side edge area of ​​the lens has almost no effect on the optical properties of the lens. Therefore, the feed plate 10 in this portion can adopt a solid metal conductor structure, that is, the feed plate 10 in this portion is pure metal, which is beneficial to ensuring the efficiency of the antenna.

[0072] The portion of the feed plate 10 extending along the side of the lens toward the bottom of the lens will affect the optical properties of the lens to a certain extent. In order to reduce this influence, a transparent metal grid structure is adopted for this portion in this embodiment.

[0073] In the embodiment of FIG2 , this embodiment is adopted, and the feed sheet 10 is composed of a solid metal conductor part and a transparent metal grid part. For example, the line width of the transparent metal grid is set to 6um, the line thickness is set to 2um, and the line spacing is set to 130um. Since the transparent metal grid part of the feed sheet 10 is still in the edge area of ​​the lens, and the metal grid is transparent, it is difficult for the human eye to detect. In actual applications, the solid metal conductor part of the feed sheet 10 usually overlaps with the frame because it is too close to the edge. That is, after the frame is installed, the pure metal part of the feed sheet 10 is usually hidden inside the frame and has no effect on the optical properties.

[0074] In a specific embodiment of the present invention, it may further include:

[0075] A first matching branch 30 connected to the feed plate 10 and arranged in the extending direction of the feed plate 10;

[0076] The first matching branch 30 adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens. The first matching branch 30 is used to perform impedance matching in the first frequency band.

[0077] This embodiment takes into account that the first matching branch 30 is provided in the extension direction of the feed plate 10, which is equivalent to a series inductor, can offset part of the capacitance introduced by the capacitive coupling feed and improve the impedance matching performance in the low frequency band. That is, the first matching branch 30 can be used for impedance matching in the first frequency band. The length of the first matching branch 30 can also be set and adjusted as needed. For example, in one embodiment, the length of the first matching branch 30 can be set to 8.6 mm.

[0078] Since the first matching branch 30 is arranged in the extension direction of the feeding plate 10, in order to reduce the impact on the optical characteristics, in addition to fixing the first matching branch 30 at the edge area of ​​the lens, the first matching branch 30 also needs to adopt a transparent metal grid structure.

[0079] Please refer to Figure 3, which is a comparative schematic diagram of a specific embodiment without and with the first matching branch 30. It can be seen from the imaginary part of the input impedance that, without the first matching branch 30, within the first frequency band, the imaginary part of the input impedance is approximately -50 ohms, which is capacitive. After the first matching branch 30 is provided, the imaginary part of the input impedance reaches an ideal value of approximately 0 ohms.

[0080] In a specific embodiment of the present invention, it may further include:

[0081] a second matching branch 40 connected to the feeding plate 10 and arranged in a direction perpendicular to the extension direction of the feeding plate 10;

[0082] The second matching branch 40 adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens. The second matching branch 40 is used to perform impedance matching in the second frequency band.

[0083] The feeding plate 10 is further used to generate a second resonance point when operating as a monopole in the second frequency band.

[0084] This embodiment takes into account that, in some embodiments, the feed sheet 10 also needs to be used as a monopole in the high frequency band. Therefore, in this embodiment, a second matching branch 40 is provided in the extension direction perpendicular to the feed sheet 10, which is equivalent to a parallel capacitor, which can offset part of the capacitance in the high frequency input impedance, thereby improving the impedance matching characteristics of the antenna in the second frequency band, that is, the second matching branch 40 can be used for impedance matching in the second frequency band.

[0085] Since the second matching branch 40 is arranged in an extension direction perpendicular to the feeding plate 10, in order to reduce the impact on the optical properties, in addition to fixing the second matching branch 40 to the edge area of ​​the lens, the second matching branch 40 also needs to adopt a transparent metal grid structure.

[0086] It is also understandable that the extension direction of the second matching branch 40 is toward the middle area of ​​the lens. Therefore, in practical applications, the second matching branch 40 cannot be set too long. For example, in the case of Figure 2, the second matching branch 40 is a shorter rectangle, for example, specifically 4.4 mm.

[0087] Please refer to Figure 4, which is a front view of the lens antenna in a specific scenario of the present application. The human eye, as a visual organ, 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 can be seen from Figure 3, the feed plate 10, the first matching branch 30, and the second matching branch 40 of the present application are all located outside the horizontal angle of -60° to 60° and the vertical angle of -40° to 40°. This shows that the lens antenna of the present application is extremely difficult to be perceived by the human eye and will not affect the optical properties. In other words, when setting the position of the feed plate 10, the first matching branch 30, and the second matching branch 40, whether they are fixed to the edge area of ​​the lens should be based on whether they exceed the observation range of the human eye.

[0088] In addition, in the above embodiment, the first matching branch 30 and the second matching branch 40 adopt a transparent metal grid structure. In the subsequent embodiment, the first capacitor loading branch 50 and the second capacitor loading branch 60 also adopt a transparent metal grid structure. In actual application, in order to facilitate production and manufacturing, the specific grid sizes adopted in these transparent metal grid structures can be the same. Of course, the grid size of a certain component can also be adjusted as needed, which will not affect the implementation of the present invention.

[0089] In addition, in practical applications, the structures of these transparent metal grids can be various types of pores such as square holes and round holes, which will not affect the implementation of the present invention.

[0090] In a specific embodiment of the present invention, it may further include:

[0091] A first capacitor loading branch 50 connected to the ring ground 20 for tuning the first resonance point;

[0092] The first capacitor loading branch 50 adopts a transparent metal grid structure, and the first capacitor loading branch 50 is in a long strip shape and is fixed to the side edge area of ​​the lens.

[0093] As described above, a gap is provided at a specified location on the annular ground plane 20. Both the position and width of the gap are tunable, i.e., both affect the first resonance point. In this embodiment, to further enhance tuning flexibility, a first capacitive loading branch 50 is provided, connected to the annular ground plane 20, for tuning the first resonance point.

[0094] To avoid affecting the optical properties, the first capacitor loading branch 50 is fixed to the side edge area of ​​the lens and adopts a transparent metal mesh structure. In addition, to ensure that the first capacitor loading branch 50 has a certain length, the first capacitor loading branch 50 can be set as a long strip.

[0095] In addition, it can be understood that, as described above, the feed plate 10 is usually also arranged in the side edge area of ​​the lens. Therefore, when it is necessary to set the first capacitor loading branch 50, the feed plate 10 and the first capacitor loading branch 50 can be located on the left and right sides of the lens respectively, and in actual applications, considering that the feed plate 10 needs to be connected to the radio frequency device through a coaxial line, the first capacitor loading branch 50 is usually arranged on the side close to the nose, and the feed plate 10 is arranged on the side close to the ear, so as to facilitate the wiring of the feed plate 10. This embodiment is adopted in the embodiment of Figure 2. The coaxial feeding point on the feed plate 10 is marked in Figure 2, that is, the position where the feed plate 10 is used to connect to the coaxial line. In actual applications, in order to ensure the firmness of the connection and reliable conductive effect, the feed plate 10 is usually welded to the coaxial line. Correspondingly, the annular ground 20 is also usually welded to the coaxial line.

[0096] For example, in the case of Figure 2, the inner conductor of the coaxial line can be connected to the feed plate 10 by low-temperature welding, and the outer conductor of the coaxial line can be connected to the U-shaped ring by low-temperature welding. The U-shaped ring described here refers to the annular part 20 used to connect the coaxial line, which can be set to a U-shaped structure, so that it has a larger surface area to facilitate welding.

[0097] In addition, according to the formula R=ρ×L / (W×h), ρ is the conductivity, L is the conductor length, and W×h reflects the cross-sectional area of ​​the conductor. The larger the cross-sectional area of ​​the conductor, the more conducive it is to ensuring the antenna efficiency. As described above, the annular ground 20 of the present application is arranged around the edge of the lens. Therefore, the annular ground 20 can usually adopt a solid metal conductor, which will not affect the optical properties and is conducive to ensuring the efficiency of the lens antenna of the present application.

[0098] In a specific embodiment of the present invention, it may further include:

[0099] A second capacitor-loaded branch 60 connected to the annular ground 20 and the first capacitor-loaded branch 50 for tuning the first resonance point;

[0100] The second capacitor loading branch 60 adopts a transparent metal grid structure, and the second capacitor loading branch 60 is long and fixed to the bottom edge area of ​​the lens;

[0101] The width of the second capacitor loading branch 60 is greater than the width of the first capacitor loading branch 50;

[0102] Among them, the length direction of the first capacitor loading branch 50 represents the extension direction of the first capacitor loading branch 50, and the width direction of the first capacitor loading branch 50 is perpendicular to the length direction of the first capacitor loading branch 50; the length direction of the second capacitor loading branch 60 represents the extension direction of the second capacitor loading branch 60, and the width direction of the second capacitor loading branch 60 is perpendicular to the length direction of the second capacitor loading branch 60.

[0103] This embodiment takes into account that in order to further improve the flexibility of tuning, in addition to setting up a first capacitor loading branch 50 for tuning the first resonance point, a second capacitor loading branch 60 for tuning the first resonance point can be further set in the extension direction of the first capacitor loading branch 50.

[0104] Similarly, to avoid affecting the optical properties, the second capacitor loading branch 60 is fixed to the bottom edge of the lens and adopts a transparent metal mesh structure. In addition, to ensure that the second capacitor loading branch 60 has a certain length, the second capacitor loading branch 60 can generally be configured as a long strip.

[0105] The difference from the first capacitor loading branch 50 is that since the second capacitor loading branch 60 is fixed to the bottom edge area of ​​the lens, and the observation range of the human eye is smaller in the vertical direction than in the horizontal direction, the width of the second capacitor loading branch 60 can be higher than the width of the first capacitor loading branch 50 to allow for a wider range of tuning, that is, further improving the flexibility of tuning.

[0106] In a specific embodiment of the present invention, a gap is provided at a designated position on the bottom of the annular ground 20 , and a gap is provided at the same position on the second capacitor loading branch 60 .

[0107] As described above, the gap of the annular ground 20 is usually set at a specified position at the bottom. Considering that a second capacitor loading branch 60 is set in the bottom edge area of ​​the lens, a gap is also required for the second capacitor loading branch 60 at the bottom gap position of the annular ground 20 to ensure the tuning effect of the first resonance point.

[0108] Please refer to Figures 5 and 6. Figure 5 is a schematic diagram of the change of return loss of the lens antenna in one embodiment of the present application and the classic pure metal antenna with frequency. It can be seen that the difference in return loss between the two is small. Figure 6 is a schematic diagram of the change of efficiency of the lens antenna in one embodiment of the present application and the classic pure metal antenna with frequency. It can be seen that the difference in efficiency between the two is also small. Therefore, it can be explained that the lens antenna of the present application has good return loss and high efficiency.

[0109] In applying the technical solutions provided by the embodiments of the present invention, the present application takes into account that the human eye, as a visual organ, typically has a range of observation of plus or minus 60 degrees horizontally and plus or minus 40 degrees vertically, and that as the angle of vision increases, the human eye's vision rapidly decreases. This means that although the human eye can see objects within a wide angle range, the clarity is greatly reduced. The lens antenna in the present application's solution is positioned as far away from the optical display area as possible, allowing the present application's solution to preserve the original optical properties of the lens as much as possible, effectively ensuring the user's visual experience.

[0110] Specifically, in the solution of the present application, the annular ground plane 20 is arranged around the edge of the lens, which does not affect the optical properties of the lens. A capacitive coupling gap exists between the annular ground plane 20 and the feed plate 10. The feed plate 10 can be excited and fed in the first frequency band to stimulate the annular ground plane 20 to generate a first resonance point. It can be seen that the function of the lens antenna can be realized through the feed plate 10 and the annular ground plane 20. The feed plate 10 of the present application is also fixed to the edge area of ​​the lens, which has little effect on the optical properties of the lens, which is conducive to ensuring the user's visual effect.

[0111] In addition, the present application takes into account that the traditional solution uses the entire lens area to design the lens antenna because this allows for easy adjustment of the shape, size, and position of each component, allowing the designed lens antenna to easily reach the desired resonance point. However, in the solution of the present application, the annular ground 20 is limited to being set around the edge of the lens, and the feed plate 10 also needs to be fixed to the edge area of ​​the lens. In addition, the present application also takes into account that different users require different lens sizes, resulting in different lengths of the annular ground 20. Therefore, in order to enable the lens antenna of the present application to reach the desired resonance point, the solution of the present application sets a gap at a specified position of the annular ground 20, and the position of the gap will affect the value of the first resonance point. In other words, when the length of the annular ground 20 varies due to lenses of different sizes, the solution of the present application can adapt. That is, by selecting a suitable specified position of the annular ground 20 to set a gap, the lens antenna of the present application can still reach the required first resonance point, ensuring the flexibility of the solution.

[0112] In summary, the lens antenna of the present application has little effect on the optical properties of the lens, which is beneficial to ensuring the user's visual effect. Moreover, for lenses of different sizes, the lens antenna of the present application can easily reach the required first resonance point.

[0113] Corresponding to the above method embodiments, embodiments of the present invention further provide glasses that may include the lens antenna described in any of the above embodiments. See Figure 7 for an exploded view of glasses in a specific embodiment, in which the lenses and lens antenna are secured via front and rear frames.

[0114] In practical applications, the glasses of the present application can generally be the AR glasses mentioned above. Of course, in other occasions, for other types of glasses, the lens antenna of the present application can also be set.

[0115] 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.

[0116] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the technical solutions and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A lens antenna, characterized in that: The lens antenna is arranged in the glasses, and the lens antenna comprises: A feeding plate, used for performing excitation feeding in a first frequency band to excite the ring ground to generate a first resonance point; The annular ground having a capacitive coupling gap with the feeding plate; The annular ground is arranged around the edge of the lens, and a gap is provided at a designated position of the annular ground. The feeding plate is fixed at the edge area of ​​the lens.

2. The lens antenna according to claim 1, characterized in that: The feeding plate is also used to generate a second resonance point when operating as a monopole in a second frequency band.

3. The lens antenna according to claim 1, characterized in that: The feeding plate is a strip-shaped feeding plate, and one end of the feeding plate is located at the side edge area of ​​the lens, and the other end extends along the side of the lens toward the bottom of the lens.

4. The lens antenna according to claim 3, characterized in that: The portion of the feeding plate located in the side edge area of ​​the lens adopts a solid metal conductor structure, and the portion of the feeding plate extending along the side of the lens toward the bottom of the lens adopts a transparent metal grid structure.

5. The lens antenna according to claim 3, characterized in that: Also includes: A first matching branch connected to the feeding plate and arranged in the extending direction of the feeding plate; The first matching branch node adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens, and the first matching branch node is used for impedance matching in the first frequency band.

6. The lens antenna according to claim 3, characterized in that: Also includes: A second matching branch connected to the feeding plate and arranged in a direction perpendicular to the extension direction of the feeding plate; The second matching branch node adopts a transparent metal grid structure and is fixed to the edge area of ​​the lens, and the second matching branch node is used for impedance matching in the second frequency band; Wherein, the feeding plate is further used to generate a second resonance point when operating as a monopole in the second frequency band.

7. The lens antenna according to any one of claims 1 to 6, characterized in that: Also includes: A first capacitor loading branch connected to the annular ground and used for tuning the first resonance point; The first capacitor loading branch adopts a transparent metal grid structure, and the first capacitor loading The branches are in the shape of long strips and are fixed on the side edge areas of the lens.

8. The lens antenna according to claim 7, characterized in that: Also includes: a second capacitor-loaded branch connected to the annular ground and the first capacitor-loaded branch and used for tuning the first resonance point; The second capacitor loading branch node adopts a transparent metal grid structure, and the second capacitor loading branch node is in a long strip shape and is fixed at the bottom edge area of ​​the lens; The width of the second capacitor loading branch is greater than the width of the first capacitor loading branch; Among them, the length direction of the first capacitor-loading branch represents the extension direction of the first capacitor-loading branch, and the width direction of the first capacitor-loading branch is perpendicular to the length direction of the first capacitor-loading branch; the length direction of the second capacitor-loading branch represents the extension direction of the second capacitor-loading branch, and the width direction of the second capacitor-loading branch is perpendicular to the length direction of the second capacitor-loading branch.

9. The lens antenna according to claim 7, characterized in that: The bottom of the annular ground has a gap at a designated position, and the second capacitor loading branch has a gap at the same position.

10. A pair of glasses, characterized in that: Comprising the lens antenna as described in any one of claims 1 to 9.

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