Vehicle glass having antenna

Abstract

A vehicle glass having an antenna is provided. The vehicle glass comprises: a first glass layer; a metal thin film layer, which is disposed on the first glass layer and has an antenna pattern; and a ground layer, which is disposed under the first glass layer. The antenna pattern includes signal lines and at least one coplanar waveguide (CPW) feed patch for a CPW feed. The antenna pattern is fed by a coplanar waveguide with ground (CPWG) using the ground layer and the CPW feed patch.

Description

Automotive glass equipped with an antenna

[0001] The present invention relates to equipment and structures for wireless communication and vehicles, and more specifically, to vehicle glass equipped with an antenna.

[0002] Wireless communication technology for the transmission and reception of information continues to advance. In particular, antenna devices are required to transmit or receive signals for wireless communication, and various types and methods of antenna devices have been developed to achieve higher performance.

[0003] Meanwhile, in the automotive sector as well, various wireless communication technologies are being utilized to transmit and receive vehicle-related information in response to advancements in information and communication technology. Previously, only low-level radio transmission and reception technologies, such as radio, were equipped in vehicles; however, recently, there has been a significant increase in demand for vehicles to transmit and receive large amounts of information with various entities, such as other vehicles, surrounding objects, infrastructure, or base stations, as referred to by the term V2X. Furthermore, regarding wireless communication methods for transmitting and receiving vehicle information, there is a growing number of cases utilizing not only short-range communication systems like Wi-Fi but also global wireless communication systems such as 3GPP LTE, 5G, and 6G.

[0004] To support signal transmission and reception using such various communication systems, various types of antenna devices have been equipped in vehicles. Due to the radio wave blocking characteristics of the vehicle body, additional antenna structures formed integrally on the exterior of the vehicle body, such as the shark fin antenna shown in Fig. 1, have traditionally been mainly adopted. However, since such external antennas have a negative impact on the aesthetics of the vehicle, various methods have been proposed to reduce the aesthetic disparity. As an example, the need for glass antennas installed on the vehicle's glass has emerged.

[0005] However, conventional proposals for antennas installed on vehicle glass are limited to merely transmitting and receiving radio signals, or even if antennas supporting high-capacity communication are proposed conceptually, they are limited to the form of film antennas attached to vehicle glass at an experimental level and fail to provide a solution applicable to the mass production of vehicle glass that can be used in actual vehicles.

[0006] In particular, when vehicle glass is installed in a vehicle, there are various metal structures such as metal support panels on which the glass is seated or A-pillars provided in the vehicle frame, and thus the problem of causing interference to the antenna element installed in the vehicle glass has not been resolved.

[0007] One objective of the present invention to solve the aforementioned problems is to provide a vehicle glass equipped with a mass-producible antenna that has more stable performance and durability by being designed to take into account the influence of a glass stack-up structure mounted on an actual vehicle and a metal structure placed around the glass.

[0008] Another objective of the present invention to solve the aforementioned problems is to provide a vehicle glass equipped with an antenna capable of transmitting and receiving signals within a wideband frequency range to enable signal transmission and reception according to various communication systems applicable to automobiles.

[0009] However, the problem to be solved by the present invention is not limited thereto and may be expanded in various ways without departing from the spirit and scope of the present invention.

[0010] A vehicle glass having an antenna according to an embodiment of the present invention comprises: a first glass layer; a metal thin film layer disposed on top of the first glass layer and having an antenna pattern; and a ground layer disposed on bottom of the first glass layer, wherein the antenna pattern comprises: a monopole antenna pattern extending longitudinally and radiating a signal in a predetermined reference frequency band; a first square parasitic pattern disposed spaced apart from the monopole antenna pattern on a first transverse side of the monopole antenna pattern and radiating a signal in a first frequency band higher than the reference frequency band; a second square parasitic pattern disposed spaced apart from the monopole antenna pattern at a longitudinal position different from the first square parasitic pattern on a second transverse side of the monopole antenna pattern and radiating a signal in a second frequency band lower than the reference frequency band; and at least one CPW feed patch for coplanar waveguide (CPW) feeding. It includes, and the antenna pattern can be fed in a CPWG (Coplanar waveguide with ground) manner using the ground layer and CPW feed patch.

[0011] According to one aspect, the ground layer is positioned so that its longitudinal position overlaps only with some of the longitudinal positions of the at least one CPW feed patch, and the area where the longitudinal position does not overlap with the ground layer of the at least one CPW feed patch can be fed to the antenna pattern in a CPW manner.

[0012] According to one aspect, the ground layer may be a metal support panel for installing glass of a vehicle in which the vehicle glass is installed.

[0013] According to one aspect, the vehicle glass having the antenna may have a metal frame on at least one side.

[0014] According to one aspect, the metal frame may include at least one of a frame for installing glass of a vehicle in which the vehicle glass is installed, an A-pillar, a B-pillar, and a C-pillar.

[0015] According to one aspect, the at least one CPW feed patch may include a coupling suppression region having a plurality of longitudinal slots to suppress electrical coupling between the metal frame and the antenna pattern.

[0016] According to one aspect, the plurality of longitudinal slots may be arranged in a longitudinal position including a longitudinal end position of the ground layer.

[0017] According to one aspect, the vehicle glass may be a double-bonded glass further comprising: a polymer bonding layer disposed on top of the metal thin film layer; and a second glass layer bonded to the first glass layer and the metal thin film layer by the polymer bonding layer.

[0018] The disclosed technology may have the following effects. However, this does not mean that a specific embodiment must include all of the following effects or only the following effects; therefore, the scope of the rights of the disclosed technology should not be understood as being limited by this.

[0019] According to the vehicle glass equipped with an antenna according to one embodiment of the present invention described above, by being designed to take into account the influence of a glass stack-up structure mounted on an actual vehicle and a metal structure placed around the glass, it has the advantageous effect of being able to mass-produce while possessing more stable performance and durability.

[0020] In addition, according to the vehicle glass equipped with an antenna according to one embodiment of the present invention described above, by enabling the transmission and reception of signals within a frequency range spanning a wide band, it is possible to enable the transmission and reception of signals according to various communication systems applicable to automobiles.

[0021] FIG. 1 is an example of a shark-fin antenna for a vehicle according to the prior art.

[0022] FIG. 2 is an example diagram of an antenna device provided on a vehicle glass.

[0023] FIG. 3 shows a layer structure of a vehicle glass equipped with an antenna according to one embodiment of the present invention.

[0024] FIG. 4 is an example diagram of a misalignment-based connector connection structure according to one aspect of the present invention.

[0025] FIG. 5 is an example of an embodiment of a connector connection structure for a vehicle glass equipped with an antenna according to one embodiment of the present invention.

[0026] FIG. 6 is an example of a broadband antenna pattern that can be applied to vehicle glass according to one embodiment of the present invention.

[0027] Figure 7 shows the current flow path of the antenna pattern of Figure 6.

[0028] Figure 8 shows an exemplary design form of the antenna pattern of Figure 6.

[0029] Figure 9 shows the S-parameters measured according to the antenna pattern of Figure 6.

[0030] FIG. 10 illustrates a vehicle installation state of a vehicle glass equipped with an antenna according to one embodiment of the present invention.

[0031] FIG. 11 illustrates the vehicle mounting state of the front windshield according to one side.

[0032] FIG. 12 shows an exemplary arrangement relationship between an antenna pattern and a metal structure provided on a vehicle glass.

[0033] FIG. 13 is a perspective view of a vehicle glass having a metal frame and an antenna according to one embodiment of the present invention.

[0034] Fig. 14 is a front view of the vehicle glass of Fig. 13.

[0035] Fig. 15 is a rear view of the vehicle glass of Fig. 13.

[0036] Figure 16 shows the change in electric field distribution depending on whether longitudinal slots are provided.

[0037] Figure 17 shows the change in S parameters depending on whether a longitudinal slot is provided.

[0038] Figure 18 shows the S parameters measured according to the vehicle glass equipped with the metal frame and antenna of Figure 13.

[0039] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail.

[0040] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0041] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0042] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0043] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0044] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0045] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding of the present invention, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted.

[0046]

[0047] outline

[0048] As mentioned above, various wireless communication technologies are being utilized in the automotive sector to transmit and receive vehicle-related information, and the V2X field, in particular, is receiving significant attention for its ability to transmit and receive large amounts of information with various entities such as other vehicles, surrounding objects, infrastructure, or base stations. Regarding wireless communication methods for transmitting and receiving vehicle information, there is an increasing number of cases utilizing not only short-range communication systems such as Wi-Fi but also global wireless communication systems such as 3GPP LTE, 5G, and 6G.

[0049] In order to support signal transmission and reception using such various communication systems, various types of antenna devices have been provided in vehicles, and due to the radio wave blocking characteristics of the vehicle body, additional antenna structures formed integrally on the exterior of the vehicle body, such as the shark-fin antenna (10) shown in Fig. 1, have been mainly adopted in the past.

[0050] However, since such external antennas have a negative impact on the aesthetics of the vehicle, various methods have been proposed to reduce the aesthetic disparity. For example, the need for a glass antenna installed on the glass of a vehicle has arisen. FIG. 2 is an example of an antenna device provided on vehicle glass. As shown in FIG. 2, an antenna installation area (20) may be provided, for example, on the front windshield installed on a vehicle. However, this is merely an example, and an antenna installation area may be provided on at least a part of the front, side, or rear of the vehicle.

[0051] Although the concept of equipping an antenna on the glass of a vehicle has been proposed in the past, conventional proposals for antennas installed on vehicle glass were limited to merely transmitting and receiving radio signals, or even if antennas supporting high-capacity communication were proposed conceptually, they were limited to the form of film antennas attached to vehicle glass at an experimental level and failed to provide a solution applicable to the mass production of vehicle glass that can be used in actual vehicles.

[0052] Furthermore, conventional antenna patterns for transmitting and receiving signals in broadband or multi-band frequency bands employed highly complex structures, which reduced mass production feasibility and made them difficult to realize. Since the detailed structure of the pattern required to radiate signals in a specific frequency band demanded highly precise numerical and geometric design, there was a very high probability that the signal would not be radiated as designed due to slight design changes or changes in the application. However, automobiles are classified into a wide variety of types, such as SUVs and sedans; moreover, even within the same vehicle type, the curvature, shape, and thickness of the glass vary depending on the model, which can lead to variations in the characteristics of the radiated signals. In vehicle signal transmission and reception, specific signals are required to possess directional properties—for example, GNSS signals are controlled to radiate upwards toward satellites, while V2X signals are radiated horizontally. To achieve this, there was a need to tune the antenna pattern to suit each vehicle type and / or model. However, it was practically impossible to tune conventional complex patterns for application to individual vehicles.

[0053] The present invention aims to solve such problems. According to a vehicle glass equipped with an antenna in one embodiment of the present invention, the design takes into account the influence of a glass stack-up structure mounted on an actual vehicle and / or a metal structure placed around the glass, thereby providing the advantageous effect of being able to mass-produce while possessing more stable performance and durability. In other words, the need for a glass antenna that prevents the external antenna from damaging the exterior appearance of the vehicle has arisen. According to a vehicle glass equipped with an antenna in one aspect of the present invention, stable performance and durability can be provided by taking into account the influence of a metal structure located around the vehicle glass while protecting the antenna pattern from the external environment.

[0054] Furthermore, regarding the antenna pattern provided on the vehicle glass according to one aspect of the present invention, in radiating broadband radiation, multi-band radiation, or signals of a specific frequency band, by simplifying possible pattern design and simplifying elements for tuning the transmitted and received signals, the radiation characteristics of the transmitted and received signals can be easily controlled according to the vehicle to which they are applied. That is, by simplifying design parameters, the radiation characteristics of the signal according to the application can be simply tuned.

[0055] Hereinafter, a vehicle glass having an antenna according to embodiments of the present invention will be described in more detail with reference to the drawings.

[0056]

[0057] Automotive glass equipped with an antenna

[0058] FIG. 3 shows a layer structure of a vehicle glass having an antenna according to one embodiment of the present invention. As shown in FIG. 3, a vehicle glass (1000) having an antenna according to one aspect of the present invention may include at least one of a first glass layer (100), a metal thin film layer (200), a polymer bonding layer (300), and a second glass layer (400).

[0059] For example, according to one aspect of the present invention, a vehicle glass (100) having an antenna may include a first glass layer (100) and a metal thin film layer (200) disposed on the first glass layer and having an antenna pattern. Note that the metal thin film layer (200) may, for example, be coated with silver (Ag) paste on the first glass layer (100), but is not limited thereto, and any metal material for forming the antenna pattern may be used.

[0060] According to one aspect, the vehicle glass (1000) may further include a polymer bonding layer (300) disposed on top of a metal thin film layer and a second glass layer (400) bonded to the first glass layer and the metal thin film layer by the polymer bonding layer. Accordingly, the vehicle glass (1000) according to one aspect of the present invention may be a double-bonded glass. According to one aspect, the polymer bonding layer (300) may be polyvinyl-butyral (PVB), but is not limited thereto.

[0061] As a non-limiting example, the thickness of the first glass layer (100) and the second glass layer (400) may be 2.1 mm, the thickness of the polymer bonding layer (300) may be 0.8 mm, and the thickness of the metal thin film layer may be 30 to 80 nm, preferably 5 to 20 µm, but is not limited thereto.

[0062] However, the vehicle glass equipped with an antenna according to one aspect of the present invention may have a thickness and / or shape capable of providing safety in the event of a collision of the vehicle. For example, double-bonded glass bonded, for instance, via PVB, may be used for the front windshield of the vehicle to reduce the possibility of breakage due to a collision or of an object from the outside penetrating and entering the interior. However, it should be noted that the technical concept of the present invention is not limited to double-bonded glass.

[0063] In this regard, for example, in the case of automotive glass such as double-bonded glass, an antenna pattern can be provided by forming a metal thin film layer (200) between a first glass layer and a second glass layer as shown in FIG. 3. Since the antenna pattern has glass layers on both the upper and lower layers, it can be implemented to have very low risk of damage and high durability. However, in such a structure, the metal thin film layer is required to be formed to have a very thin thickness, so if a conventional antenna pattern design is followed in which a metal layer of a certain thickness or more is provided, it is highly likely that resonance will not occur as intended. Furthermore, in a conventional antenna design, the layer providing the antenna pattern is required to be placed at the outermost edge, but in the case of an antenna pattern embedded in double-bonded glass as shown in FIG. 3, glass layers are provided on both the upper and lower sides, and such glass layers have a considerable thickness to ensure the safety of the vehicle. In a non-limiting manner, for example, glass with a total thickness of 4 mm or more is positioned adjacent to the antenna pattern as a dielectric, so that, according to a general antenna design, a signal is not radiated and an electromagnetic field is formed inside the double-bonded glass. Accordingly, the antenna patterns according to the embodiments of the present invention described below are designed to achieve target radiation characteristics while maintaining the basic performance of automotive glass, taking into account such special characteristics.

[0064] First, considering that, unlike a conventional patch antenna in which a ground region is formed on one side of the dielectric and a microstrip line is disposed on the other side of the dielectric, only a single layer of metal thin film (200) can be used for antenna fabrication in the structure of automotive glass, according to one aspect of the present invention, an antenna pattern provided on the metal thin film layer (200) of an automotive glass (1000) equipped with an antenna may adopt a coplanar waveguide (CPW) feeding structure. That is, the antenna pattern provided on the metal thin film layer (200) may include at least one CPW feeding patch for CPW feeding. Here, a structure is required for a coupler to be coupled to the CPW feeding patch for supplying a feeding signal.

[0065] In this regard, FIG. 4 is an exemplary diagram of a misalignment-based connector connection structure according to one aspect of the present invention, and FIG. 5 is an exemplary embodiment of a connector connection structure of a vehicle glass equipped with an antenna according to one embodiment of the present invention.

[0066] As illustrated in FIGS. 4 and 5, according to one aspect of the present invention, a second glass layer (400) and a first glass layer (100) may be joined together in a state including an intended misalignment. That is, the second glass layer (400) may be spaced apart from the first glass layer (100) by, for example, a predetermined distance (d1) in the longitudinal direction. Herein, the longitudinal direction may refer to, for example, the height direction when the vehicle glass is placed in a vehicle, but is not limited thereto. Hereinafter, in this description, 'longitudinal direction' and 'transverse direction' may be used to refer to different directions that are orthogonal to each other. For example, the 'longitudinal direction' may be referred to as the 'first direction' and the 'transverse direction' may be referred to as the 'second direction'. According to one aspect, a metal thin film layer (200) may be formed aligned with a first glass layer at a predetermined position, and a PVB layer (300) may be applied at a position corresponding to the underside of the second glass layer, but is not limited thereto.

[0067] Referring again to FIGS. 4 and 5, by positioning the second glass layer (400) apart from the first glass layer (100) by a predetermined distance (d1), at least a portion of the metal thin film layer (200) may form an area not covered by the second glass layer (400). A connector (500) for feeding power to an antenna pattern may be connected to the area of ​​the metal thin film layer (200) formed in this way that is not covered by the second glass layer (400). Accordingly, according to one aspect of the present invention, a connector (500) for supplying a power signal to an antenna pattern can be connected without performing separate additional processing on the first glass layer (100) or the second glass layer (400).

[0068] According to one aspect, the metal thin film layer (200) antenna pattern includes at least one CPW feed patch for coplanar waveguide (CPW) feeding, and the area not covered by the second glass layer (400) of the aforementioned metal thin film layer (200) may be formed in at least a portion of such CPW feed patch. That is, by positioning the second glass layer (400) at a predetermined distance from the first glass layer (100), at least a portion of the CPW feed patch formed in the metal thin film layer (200) is configured not to be covered by the second glass layer (400), and a connector (500) may be attached to this area. For example, the second glass layer (400) may be removed by 5 mm in the feed patch area to attach the connector in the target band, but it should be noted that this is merely exemplary and is not limited to that value.

[0069] According to one aspect, the longitudinal length of the region in which at least a portion of the metal thin film layer (200) is not covered by the second glass layer (400) may be set to be smaller than the longitudinal length of the glass insert portion of the glass frame of a vehicle in which the vehicle glass according to one aspect of the present invention is installed. Accordingly, when the vehicle glass is installed on the vehicle frame, even if misalignment as described above is included, it can be prevented from being exposed to the outside other than the first glass layer or the second glass layer.

[0070]

[0071] Broadband antenna pattern

[0072] As mentioned above, various wireless communication technologies are utilized in the automotive sector to transmit and receive vehicle-related information. In particular, the V2X field, where vehicles transmit and receive large volumes of information with various entities such as other vehicles, surrounding objects, infrastructure, or base stations, is receiving significant attention. Regarding wireless communication methods for such vehicle information transmission and reception, there is an increasing number of cases utilizing not only short-range communication systems like Wi-Fi but also global wireless communication systems such as 3GPP LTE, 5G, and 6G. Furthermore, GNSS antennas for determining vehicle location information are also being equipped as essential components in vehicles. Therefore, there is a growing need for an integrated antenna that combines various band antennas required for internal and external vehicle communication, such as GNSS, Wi-Fi, V2X, and 4G / 5G / 6G. In particular, even in the case of automotive glass equipped with antennas, there may be a demand for an integrated antenna capable of performing all signal transmission and reception through various communication systems. As a non-limiting example, the implementation of an integrated antenna in which all antennas for internal and external vehicle communication bands are included on the vehicle's windshield may be required. To achieve this, antennas for all bands may be located together, or a full-field antenna covering a wideband is required.

[0073] According to one aspect of the present invention, an antenna pattern provided on a metal thin film layer (200) may be a broadband antenna pattern capable of transmitting and receiving signals for various communication systems required for internal and external communication of a vehicle. Hereinafter, a broadband antenna pattern that can be embedded in a vehicle glass having an antenna according to one aspect of the present invention will be described in more detail with reference to the drawings.

[0074]

[0075] FIG. 6 is an exemplary diagram of a broadband antenna pattern that can be applied to a vehicle glass according to an embodiment of the present invention, and FIG. 8 shows an exemplary design form of the antenna pattern of FIG. 6. Annotations of FIG. 8 may be used to refer to the length of the elements of the antenna pattern of FIG. 6.

[0076] As illustrated in FIG. 6, a broadband antenna pattern that can be applied to a vehicle glass (1000) according to one aspect of the present invention may include a monopole antenna pattern (210), a first square parasitic pattern (220), a second square parasitic pattern (230), a first CPW feed patch (241), and a second CPW feed patch (243).

[0077] As described above, in order to provide an antenna in the vehicle glass, a single metal thin film layer (200) may be provided, so the antenna pattern implemented in the metal thin film layer (200) can perform feeding in a CPW manner. For this purpose, for example, a first CPW feeding patch (241) and a second CPW feeding patch (243) may be placed at one end of the longitudinal direction of the metal thin film layer (200). Here, the longitudinal direction may refer to, for example, the height direction when the vehicle glass is placed in a vehicle, but is not limited thereto. Hereinafter, in this description, 'longitudinal direction' and 'transverse direction' may be used to refer to different directions that are orthogonal to each other. Hereinafter, for convenience of explanation, the up-down direction in the drawings may be referred to as the longitudinal direction and the left-right direction in the drawings as the transverse direction, but it should be noted that the technical concept of the present invention is not limited thereto.

[0078] Referring again to FIG. 6, the monopole antenna pattern (210) may be configured to extend longitudinally and radiate a predetermined reference frequency band signal. As a non-limiting example, the extension of the monopole antenna pattern (210) may be arranged to have a predetermined spacing between the first CPW feed patch (241) and the second CPW feed patch (243). As previously described, a first part of the connector may be connected to the first CPW feed patch (241) and the second CPW feed patch (243), and a second part of the connector may be connected to the extension of the monopole antenna pattern (210). Thus, it is possible to supply a feed signal to an antenna pattern having a single layer. The reference frequency band signal radiated by the monopole antenna pattern (210) may be, for example, the center frequency of the frequency band radiated by the antenna pattern, but is not limited thereto.

[0079] In order to transmit and receive wireless signals required for internal and external communication of a vehicle, such as GNSS, WiFi, V2X, 4G / 5G / 6G, a vehicle glass having an antenna according to one embodiment of the present invention, as a non-limiting example, may be configured to transmit and receive signals of approximately 1 GHz to 4 GHz, more specifically 1.4 GHz to 3.7 GHz. Accordingly, as a non-limiting example, a monopole antenna pattern (210) may be configured to transmit and receive signals of 2.4 GHz. To this end, for example, a monopole antenna formed by the monopole antenna pattern (210) may be set to have a length of λ / 4 for a wavelength λ corresponding to a frequency of 2.4 GHz.

[0080] Meanwhile, according to one aspect of the present invention, an open-ended branch may be provided for impedance matching of the monopole antenna pattern (210). For example, the antenna pattern may further include a transverse branch pattern (211) extending from the monopole antenna pattern (210) to a second transverse side. The transverse branch pattern (211) may be spaced apart from the second square parasitic pattern at a predetermined interval. For impedance matching of the monopole antenna pattern (210), the monopole antenna and the branch may have a predetermined length ratio. As a non-limiting example, the length ratio of the vertical part to the horizontal part may be set to 2:1. For example, the length (210L) from the branching point of the transverse branch pattern (211) of the monopole antenna pattern (210) to the end of the monopole antenna pattern (210) may be twice the length (211L) of the transverse branch pattern (211). Accordingly, impedance matching for the monopole antenna pattern (210) is performed to ensure improved power efficiency, reduced signal reflection, and system stability. The width (210W) of the monopole antenna pattern (210) and the width (211W) of the transverse branch pattern (211) may be the same, but are not limited thereto.

[0081] According to one aspect of the present invention, for broadband signal transmission and reception, a metal patch that is not directly fed around a monopole antenna can be placed to improve impedance matching and expand the frequency bandwidth. Such a metal patch can be combined with the original monopole antenna to function as an additional inductor or capacitor.

[0082] In other words, as illustrated in FIG. 6, a first square parasitic pattern (220) and a second square parasitic pattern (230) may be provided around a monopole antenna pattern (210) according to one aspect of the present invention. Such first square parasitic pattern (220) and / or second square parasitic pattern (230) may be a surface-shaped patch having a predetermined area or larger. In this regard, as previously described, the metal thin film layer (200) applicable to automotive glass may have a thickness much thinner than that which can be utilized for general antenna formation, such as 30 to 80 nm. If a general antenna patch design is applied to such a thin metal layer, the intended radiation characteristics may not be achieved. According to one aspect of the present invention, at least some of the patches constituting the antenna patch, for example, a first square parasitic pattern (220) and / or a second square parasitic pattern (230), are composed of planar radiators, so that the current density within the pattern is minimized, thereby preventing an increase in resistance per area and an increase in surface energy loss due to the concentration of current density. Additionally, since they are composed of planar radiators, they can provide various current flow paths compared to line-shaped patches and provide various cases for resonance that may occur, thus enabling broadband signal radiation.

[0083] Referring to FIG. 6, the first square parasitic pattern (220) may be configured to be spaced apart from the monopole antenna pattern on the first transverse side of the monopole antenna pattern (210) and to radiate a first frequency band signal higher than the reference frequency band radiated by the monopole antenna pattern (210). For example, the first square parasitic pattern (220) may be configured to transmit and receive a signal in the 3 GHz band, but is not limited thereto.

[0084] Meanwhile, the second square parasitic pattern (230) may be configured to be spaced apart from the monopole antenna pattern at a longitudinal position different from the first square parasitic pattern on the second transverse side of the monopole antenna pattern (210), so as to radiate a second frequency band signal lower than the reference frequency band radiated by the monopole antenna pattern (210). For example, the second square parasitic pattern (230) may be configured to transmit and receive a signal in the 2 GHz band, but is not limited thereto.

[0085] According to one aspect, the longitudinal length (220L) of the first square parasitic pattern (220) and the longitudinal length (230L) of the second square parasitic pattern (230) may be equal to each other, and the transverse length (230W) of the second square parasitic pattern (230) may be formed to be longer than the transverse length (220W) of the first square parasitic pattern (220).

[0086] More specifically, although not limited thereto, the ratio of the longitudinal length (220L) of the first square parasitic pattern (220) to the transverse length (220W) of the first square parasitic pattern (220) may be set to 1:1, and the ratio of the longitudinal length (230L) of the second square parasitic pattern (230) to the transverse length (230W) of the second square parasitic pattern (230) may be 1:2. Thus, the antenna pattern according to one aspect of the present invention can easily control radiation characteristics according to the type or model of the vehicle by simplifying design parameters as much as possible and minimizing variable elements relative to fixed elements.

[0087] Meanwhile, according to one aspect of the present invention, the antenna pattern may include a configuration for improving impedance matching of parasitic patches. For example, a parasitic patch in the direction having a horizontal branch may have an aspect ratio of 2:1 and improve impedance matching around 2 GHz, and a parasitic patch in the opposite direction may have a ratio of 1:1 and improve impedance matching around 3 GHz.

[0088] More specifically, the antenna patch according to one side may further include a stub pattern (213) that extends from the monopole antenna pattern (210) to a first side in the transverse direction and is spaced apart from the first square parasitic pattern (220) by a preset distance. Such a stub pattern (213) may be used to improve the impedance matching of the first square parasitic pattern (220). For example, the stub pattern (213) may generate inductance, and the spacing between the stub pattern (213) and the first square parasitic pattern (220) may generate capacitance, but is not limited thereto.

[0089] Meanwhile, the aforementioned transverse branch pattern (211) may be used to improve the impedance matching of the second square parasitic pattern (230). For example, the transverse branch pattern (211) generates inductance, and the gap between the transverse branch pattern (211) and the second square parasitic pattern (230) may generate capacitance, but is not limited thereto.

[0090] Meanwhile, as previously mentioned, regarding automotive glass equipped with an antenna, various environmental factors such as the position where the antenna patch can be placed, the installation angle of the glass, and the presence or absence of curvature of the patch may differ depending on the type or model of the vehicle to which it is applied. However, just as GNSS signals are transmitted and received upward toward satellites and V2X signals are transmitted and received horizontally toward surrounding objects, it is necessary to appropriately control the signal radiation direction of the automotive antenna. Therefore, it may be required to tune the antenna patch appropriately according to the type, model, and location of the vehicle in which the automotive glass equipped with an antenna is installed, in order to control the radiated signal or adjust the impedance matching. According to the prior art, since broadband antenna patterns have a very complex design, there was a problem in that tuning required an amount of effort and time equivalent to performing a nearly new design even for such small environmental differences. According to one aspect of the present invention, as a non-limiting example, other design elements may be fixed, and control, change, or impedance matching of the radiation direction and radiation frequency may be performed by changing the transverse length (213W) of the stub pattern (213) and the transverse length (211W) of the transverse branch pattern (211). For example, depending on the type of vehicle in which the vehicle glass is installed, the longitudinal length (211W) of the transverse branch pattern (211) and the longitudinal length (213W) of the stub pattern (213), i.e., the width, may be maintained, but at least one of the transverse length (213W) of the stub pattern (213) and the transverse length (211W) of the transverse branch pattern (211) may be changed so that at least one of the radiation direction or radiation frequency can be easily controlled.Other conditions, such as the spacing between the first square parasitic pattern (220) and the stub pattern (213), the spacing between the second square parasitic pattern (230) and the transverse branch pattern (211), the longitudinal / transverse length of the first square parasitic pattern (220) or the second square parasitic pattern (230), the width (210W) of the monopole antenna pattern (210), and the spacing between the monopole antenna pattern (210) and other patterns, may be fixed, but are not limited thereto.

[0091] FIG. 7 illustrates the current flow path of the antenna pattern of FIG. 6. As illustrated in FIG. 6 and FIG. 7, a vehicle glass having an antenna according to an embodiment of the present invention has an antenna pattern on a metal thin film layer (200). The antenna pattern may include a monopole antenna pattern (210), a first square parasitic pattern (220), and a second square parasitic pattern (230). Here, the monopole antenna pattern (210) may be configured to transmit and receive a signal in a reference frequency band, the first square parasitic pattern (220) may be configured to transmit and receive a signal in a frequency band higher than the reference frequency band, and the second square parasitic pattern (230) may be configured to transmit and receive a signal in a frequency band lower than the reference frequency band. Here, as illustrated in FIG. 7, a transverse current flow path is formed in the first square parasitic pattern (220) and / or the second square parasitic pattern (230), so that resonance along the transverse direction occurs and signals of polarization along the transverse direction can be transmitted and received. Additionally, a longitudinal current flow path is formed in the monopole antenna pattern (210), so that resonance along the longitudinal direction occurs and signals of polarization along the longitudinal direction can be transmitted and received. Thus, in an antenna pattern according to one aspect of the present invention, it is possible to minimize interference between signals radiated from adjacent patterns. For example, since the monopole antenna pattern (210) and the first square parasitic pattern (220) radiate signals of different polarizations even though they are adjacent to each other, mutual signal interference can be minimized. In addition, the monopole antenna pattern (210) and the second square parasitic pattern (230) are adjacent to each other but radiate signals of different polarizations, so mutual signal interference can be minimized.Although the first square parasitic pattern (220) and the second square parasitic pattern (230) transmit and receive signals of similar polarization, a monopole antenna pattern (210) is placed between them so that they are physically spaced apart, and the monopole antenna pattern (210) acts as a filter for the signals generated in the first square parasitic pattern (220) and / or the second square parasitic pattern (230), so that interference between the signals generated in the first square parasitic pattern (220) and the second square parasitic pattern (230) can be minimized.

[0092] Figure 9 shows the S-parameters measured according to the antenna pattern of Figure 6. As shown in Figure 9, when examining the S11 parameter plot across the frequency domain of a vehicle glass equipped with an antenna according to one embodiment of the present invention, it can be confirmed that both the simulation results according to the design and the measurement results according to the embodiment exhibit broadband performance within a frequency band range of approximately 1.4 to 3.7 GHz. Even when a conservative standard of 10 dB is set as the criterion for determining the radiable frequency band, it was confirmed that signals are transmitted and received in a wide frequency band of approximately 1.47 to 3.69.

[0093]

[0094] Minimization of interference in metal structures

[0095] As previously discussed, when vehicle glass is installed in a vehicle, multiple metal structures may exist around the vehicle glass, such as metal support panels or A-pillars for supporting the vehicle glass. When an antenna is provided on the vehicle glass, the metal structures may cause interference with at least some elements of such an antenna, and the radiation performance of the antenna may be significantly degraded.

[0096] In this regard, FIG. 10 illustrates a vehicle installation state of a vehicle glass equipped with an antenna according to one embodiment of the present invention, and FIG. 11 illustrates a vehicle mounting state of a front glass according to one side.

[0097] As previously described with reference to FIG. 3, a vehicle glass (1000) having an antenna according to one aspect of the present invention may include at least one of a first glass layer (100), a metal thin film layer (200), and a second glass layer (400). Additionally, as shown in FIG. 10, according to one aspect, a black band (350) may be disposed on the lower surface of the second glass layer (400). Such a black band (350) may be disposed on the upper surface of the vehicle glass to block external light, but is not limited thereto. Although omitted in FIG. 10, a polymer bonding layer (300) may be disposed on the upper surface of the metal thin film layer to bond the first glass layer (100), the metal thin film layer (200), and the second glass layer (300) together. That is, the vehicle glass (1000) may further include a polymer bonding layer (300) disposed on top of a metal thin film layer, and a second glass layer (400) bonded to the first glass layer and the metal thin film layer by the polymer bonding layer. Accordingly, the vehicle glass (1000) according to one aspect of the present invention may be a double-bonded glass. According to one aspect, the polymer bonding layer (300) may be polyvinyl-butyral (PVB), but is not limited thereto.

[0098] As a non-limiting example, as illustrated in FIG. 11, the vehicle glass according to one aspect may be glass placed on the front of the vehicle. As illustrated exemplarily in FIG. 10 and FIG. 11, when the vehicle glass is installed in the vehicle, a support panel (50) to prevent the glass from entering the interior of the vehicle may be provided on the frame. The vehicle glass can be stably installed in the vehicle by such a support panel (50). As illustrated in FIG. 10 and FIG. 11, a sealer (70) may be applied to at least a portion of the mounting surface of the vehicle glass of the support panel (50). The sealer (70) may allow the vehicle glass to be stably attached to the support panel (50) of the vehicle.

[0099] FIG. 12 illustrates an exemplary arrangement relationship between an antenna pattern and a metal structure provided in a vehicle glass. Although the front windshield of a vehicle is described as an example in FIG. 10 to FIG. 12, it should be noted that the technical concept of the present invention is not limited thereto. It should be understood that the vehicle glass equipped with an antenna according to the embodiments of the present invention includes any glass that can be mounted on a vehicle, including not only the front windshield but also side windows, sunroof glass, and rear window. In the following description, for convenience of explanation, the front windshield may be illustrated as an example in the drawings, but it should be noted that this is merely illustrative and the technical concept of the present invention is not limited to the front windshield.

[0100] As illustrated in FIGS. 10 to 12, when glass equipped with an antenna is placed in a vehicle, various structures capable of causing interference with at least some elements of the antenna pattern may exist around the pattern for implementing the antenna. In particular, since the antenna pattern needs to be placed at the edge of the glass rather than in the center to provide power to the antenna pattern, the resolution of interference problems with surrounding structures must be considered more importantly. For example, as illustrated in FIGS. 10 to 11, the antenna may be mounted on the top of the front windshield of the vehicle, and a metal support panel to support the vehicle glass may be provided on the upper part of the vehicle body frame where the vehicle glass is seated. Interference with the antenna may occur due to various electrical and magnetic factors, such as a short circuit occurring in the relationship between at least some of the elements constituting the antenna and the metal structure.

[0101] For example, if an antenna pattern is equipped with CPW feed patches, i.e., ground patches, on both sides of the feed line for coplanar waveguide (CPW) feeding, and another metal structure capable of acting as ground is located near the CPW line, a field may be generated between the metal layer constituting the antenna pattern and the metal structure, causing an impedance mismatch due to coupling. For example, charge accumulation may occur between at least a portion of the metal layer constituting the antenna pattern and another metal structure present in the vehicle, resulting in capacitance, which may cause a problem of misaligned impedance matching.

[0102] As illustrated in FIG. 12, the inventors have confirmed that an impedance mismatch occurs due to unintended field formation between at least some of the antenna components and the metal panel, for example, when the metal panel protrudes beyond the ground plane of the antenna (1110) or when the antenna pattern and the ground plane of the antenna are located in an area beyond the metal panel (1120).

[0103] When the metal panel protrudes beyond the ground plane of the antenna (1110), an unintended field is formed between the signal line of the antenna pattern and the metal panel. For example, the antenna pattern may be located in a black band region. When the ground patch of the antenna pattern and part of the signal line are placed overlapping on the metal panel, an unintended field may be formed between the unintended region and the metal panel. In particular, a field is formed between at least part of the signal line and the metal panel, and a problem has been identified in which unintended current flow occurs and resonance occurs in an unintended frequency band, such as when a specific part of the signal line acts as a parasitic element contrary to the intention.

[0104] Even when the antenna pattern and the ground plane of the antenna are positioned in an area beyond the metal panel (1120), an unintended field is generated between the metal panel and the metal layer near the CPW line, causing an impedance mismatch. That is, even when the ground patch and the entire signal line are positioned so as not to overlap with the metal support panel of the vehicle in order to keep the physical distance from the surrounding metal structure as much as possible, an unintended field is generated at least between the metal support panel and the CPW ground patch, affecting the performance of the antenna.

[0105] Automotive glass equipped with an antenna according to embodiments of the present invention is intended to solve these problems. By designing it to reflect the influence of the vehicle's metal panels and frame on antenna performance, it enables stable signal transmission and reception within the designed frequency band when mounted on an actual vehicle. A design suitable for mounting environments for antennas on various types of glass included in a vehicle, including the front windshield exemplified in the drawings, is incorporated. For example, a method to minimize interference caused by metal panels is presented for the antenna design of automotive glass equipped with an antenna mounted on an automobile. Such a design can be applied not only to antennas for the four major bands, such as GNSS, WiFi, and 4G / 5G, but also to broadband automotive antennas. It includes a structure optimized to suppress metal panel interference, along with a design technique that stably supports the bands essential for internal and external vehicle communication. Through this, automotive glass equipped with an antenna that provides high-performance communication functions while maintaining the vehicle's exterior appearance can be realized.

[0106] According to one aspect, a vehicle glass equipped with an antenna according to embodiments of the present invention may adopt a CPWG (Coplanar waveguide with ground) feeding structure by setting a metal structure provided in the vehicle, such as a metal support panel, as a ground plane and connecting it to the planar ground plane of the antenna. Through this, it was confirmed that performance of S11 ≤ -20dB is secured in the band below 5 GHz.

[0107] Hereinafter, a vehicle glass equipped with an antenna according to one embodiment of the present invention will be described in more detail.

[0108]

[0109] FIG. 13 is a perspective view of a vehicle glass having a metal frame and an antenna according to one embodiment of the present invention, FIG. 14 is a front view of the vehicle glass of FIG. 13, and FIG. 15 is a rear view of the vehicle glass of FIG. 13.

[0110] As previously described with reference to FIG. 3, a vehicle glass (1000) having an antenna according to one embodiment of the present invention may have a first glass layer (100) and a metal thin film layer (200) disposed on top of the first glass layer and having an antenna pattern. Additionally, the vehicle glass (1000) may further include a second glass layer (400). According to one aspect, a polymer bonding layer (300) may be disposed on top of the metal thin film layer to bond the first glass layer (100), the metal thin film layer (200), and the second glass layer (300) together. That is, the vehicle glass (1000) may further include a polymer bonding layer (300) disposed on top of the metal thin film layer and a second glass layer (400) bonded to the first glass layer and the metal thin film layer by the polymer bonding layer. Accordingly, the vehicle glass (1000) according to one aspect of the present invention may be a double-bonded glass. According to one aspect, the polymer bonding layer (300) may be polyvinyl-butyral (PVB), but is not limited thereto.

[0111] As illustrated in FIGS. 13 to 15, a vehicle glass (1000) having an antenna according to one embodiment of the present invention may further include a ground layer (50) disposed below a first glass layer (100). Meanwhile, an antenna pattern provided in the vehicle glass (1000) having an antenna as illustrated in FIGS. 13 to 15 may include, for example, at least a portion of an antenna pattern as illustrated in FIG. 6, but is not limited thereto. The antenna pattern may include at least one CPW feed patch (241, 243) for coplanar waveguide (CPW) feeding, along with a plurality of signal lines. An antenna pattern of a vehicle glass (1000) equipped with an antenna according to one embodiment of the present invention can be fed in a CPWG (Coplanar waveguide with ground) manner using a ground layer (50) and CPW feed patches (241, 243). According to one aspect, the ground layer (50) may be a metal support panel for glass installation in a vehicle on which the vehicle glass (1000) according to one embodiment is installed. That is, according to one embodiment of the present invention, a metal support panel of a vehicle on which the vehicle glass is installed may be recognized as a ground layer for CPWG feeding and may be employed as one component for driving the antenna pattern. That is, by connecting a CWP feed patch (241, 243) included in the antenna pattern to a coupler for feeding the antenna of a vehicle glass (1000) equipped with an antenna according to one embodiment of the present invention, and by connecting a metal support panel of the vehicle as a ground layer, the antenna pattern can be fed in a CPWG manner.Therefore, in the case of an antenna design that does not consider a metal support panel, it is possible to eliminate performance degradation caused by the influence of the metal support panel and instead adopt a CPWG feed method, which has improved stability due to the addition of a ground layer compared to the CPW feed method.

[0112] According to one aspect, as illustrated in FIGS. 13 to 15, the ground layer (50) may be positioned in a longitudinal position that overlaps at least partially with the longitudinal position of the CPW feed patch (241, 243) and may be positioned in a longitudinal position that does not overlap with the longitudinal position where the CPW feed patch (241, 243) of the antenna pattern is not located. More specifically, as illustrated in FIGS. 13 to 15, the upper portion of the ground layer (50) may be positioned closer to the feed portion than the upper portion of the CPW feed patch (241, 243). By designing the relative position between the ground layer (50), the patterns for signal radiation of the antenna pattern, and the CPW feed patch (241, 243) in this way, interference with a portion of the signal line as previously described through FIG. 12 can be minimized. When the ground layer is a metal support panel of a vehicle, the position where the antenna pattern is placed on the vehicle glass can be adjusted by considering the position where the vehicle glass is seated on the vehicle, thereby controlling the relative position between the metal support panel and the antenna pattern, that is, the relative position between the ground layer and the components for signal radiation of the antenna pattern, as described above.

[0113] As illustrated in FIGS. 13 to 15, according to one aspect, the ground layer (50) may be positioned such that its longitudinal position overlaps only with some of the longitudinal positions of at least one CPW feed patch (241, 243). For example, the upper portion of the ground layer (50) may be positioned lower than the upper portion of at least one CPW feed patch (241, 243). Thus, at least one CPW feed patch (241, 243) may be divided into an area (240) where the longitudinal position does not overlap with the ground layer (50) and an area (250) where the longitudinal position overlaps with the ground layer (50). Here, the area (240) that does not overlap with the longitudinal position of the ground layer (50) of at least one CPW feed patch (241, 243) may be configured to feed the radiating elements of the antenna pattern in a CPW manner. The area (250) that overlaps with the longitudinal position of the ground layer (50) of at least one CPW feed patch (241, 243) may be configured to feed the radiating elements of the antenna pattern in a CPWG manner.

[0114] Meanwhile, as illustrated in FIGS. 13 to 15, a vehicle glass (1000) equipped with an antenna according to one embodiment of the present invention may have a metal frame on at least one side. For example, the vehicle glass (1000) may include a first metal frame (290a) and / or a second metal frame (290b). FIGS. 13 to 15 illustrates a frame disposed on two sides as an example, but the technical concept of the present invention is not limited thereto. Here, the metal frame may include, but is not limited to, at least one of a frame for installing glass of a vehicle on which the vehicle glass is installed, an A-pillar, a B-pillar, and a C-pillar, and should be understood to include any radio wave influence structure present in the vehicle. A vehicle glass (1000) having an exemplary antenna as illustrated in FIGS. 13 to 15 enables an antenna design, such as an antenna pattern and / or a feed structure, in a state most similar to the state in which the vehicle glass is installed in a vehicle by providing a metal frame on at least one side.

[0115] Here, according to one aspect of the present invention, at least one CPW feed patch (241, 243) may include a coupling suppression region (245) that suppresses electrical coupling between a metal frame (290a, 290b) and radiating elements of an antenna pattern by having a plurality of longitudinal slots (245s). Here, the plurality of longitudinal slots (245s) may be disposed in longitudinal positions including longitudinal end positions of a ground layer (50). That is, the plurality of longitudinal slots (245s) may be disposed across the CPW feed region (240) and the CPWG feed region (250) of at least one CPW feed patch (241, 243). In other words, at least a portion of the longitudinal slots (245s) may be located in the CPW feed area (240) of the CPW feed patch (241, 243), and at least a portion of the longitudinal slots (245s) may be located in the CPWG feed area (250) of at least one CPW feed patch (241, 243).

[0116] By providing a coupling suppression region (245) having longitudinal slits in this manner, the influence between at least a portion of the metal frame (290a, 290b) and the pattern elements for signal radiation of the antenna pattern can be reduced. For example, the coupling influence between the bottom metal panel and the horizontal branch can be reduced by using CPW and CPWG lines. Additionally, the impedance mismatch caused by surface waves can be mitigated by adding a coupling suppression slot to the antenna plane ground plane. The coupling suppression region (245) having longitudinal slits according to one aspect of the present invention acts as a type of current trap, so that strong coupling occurs only in the coupling suppression region (245) having longitudinal slits, thereby preventing the influence of the bottom frame from being transmitted to the upper signal radiation element beyond at least one CPW feed patch (241, 243).

[0117] In the case of an antenna pattern for radiating a signal in a specific frequency band, it may be possible to design the radiation pattern by taking into account the influence of surrounding structures of the vehicle, such as a metal frame or a metal support panel of the vehicle. However, in the case of a broadband antenna according to one aspect of the present invention, since it is configured to radiate signals for multiple frequency bands using various parasitic elements, it may not be easy to perform a pattern design that takes into account the influence of vehicle structures for all frequency bands. According to one aspect of the present invention, by providing a coupling suppression region (245) as described above in the feed patch, for example, the influence of propagation influence elements such as a metal frame or a metal support panel of the vehicle on the signal radiation patterns of the antenna pattern can be minimized without taking into account propagation influence elements such as a metal frame or a metal support panel of the vehicle in the design of the signal radiation patterns of the antenna pattern.

[0118] FIG. 16 shows the change in electric field distribution depending on whether a longitudinal slot is provided, and FIG. 17 shows the change in S-parameters depending on whether a longitudinal slot is provided. As shown in FIG. 16, when a slot is provided (1620), it can be seen that the electric field influence of the metal structure on the upper signal radiation elements is significantly reduced compared to when a slot is not provided (1610). In addition, as shown in FIG. 17, when a slot is provided, the surface polarization generated in the metal structure is reduced compared to when a slot is not provided, and it can be seen that impedance matching around 1.5 GHz and 2.75 GHz is improved.

[0119] FIG. 18 shows the S-parameters measured according to the vehicle glass equipped with the metal frame and antenna of FIG. 13. As shown in FIG. 18, when examining the S-parameter plot across the frequency domain according to the antenna pattern of the vehicle glass equipped with the antenna according to one embodiment of the present invention, it can be confirmed that signals are transmitted and received in the target frequency range even in an environment equipped with a metal frame that simulates the actual vehicle installation state by employing a CPW feed structure and a CPWG feed structure and having a coupling suppression region. In particular, it was confirmed that it exhibits an insertion loss of less than 6 dB within the frequency band range of 1 to 5 GHz.

[0120]

[0121] Although the invention has been described above with reference to the drawings and embodiments, this does not mean that the scope of protection of the present invention is limited by the drawings or embodiments, and those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the invention as described in the following claims.

[0122] Although the present invention described above is explained based on a series of functional blocks, it is not limited by the aforementioned embodiments and attached drawings, and it will be obvious to those skilled in the art that various substitutions, modifications, and changes are possible within the scope of the technical concept of the present invention.

[0123] The combination of the aforementioned embodiments is not limited to the aforementioned embodiments, and various forms of combinations in addition to the aforementioned embodiments may be provided as needed for implementation and / or implementation.

[0124] In the aforementioned embodiments, methods are described based on flowcharts as a series of steps or blocks; however, the present invention is not limited to the order of the steps, and some steps may occur in a different order or simultaneously with other steps as described above. Furthermore, those skilled in the art will understand that the steps shown in the flowcharts are not exclusive, that other steps may be included, or that one or more steps of the flowcharts may be omitted without affecting the scope of the present invention.

[0125] The foregoing embodiments include examples of various aspects. While it is not possible to describe all possible combinations for representing various aspects, those skilled in the art will recognize that other combinations are possible. Accordingly, the present invention shall be deemed to include all other substitutions, modifications, and changes falling within the scope of the following claims.

[0126] [Explanation of the symbol]

[0127] 50: Ground layer, metal support panel

[0128] 100: 1st glass layer

[0129] 200: Metal thin film layer

[0130] 210: Monopole antenna pattern

[0131] 211: Lateral Branch Pattern

[0132] 213: Stub Pattern

[0133] 220 : 1st Square Parasitic Pattern

[0134] 230 : Second square parasitic pattern

[0135] 240 : CPW feed area

[0136] 250 : CPWG Feeding Area

[0137] 241: 1st CPW Patch

[0138] 243: 2nd CPW Patch

[0139] 245 : Coupling inhibition region

[0140] 245s: Longitudinal slit

[0141] 300: Polymer bonding layer

[0142] 400: Second glass layer

[0143] 500 : Connector

[0144] 1000 : Automotive glass equipped with an antenna

Claims

1. As a vehicle glass equipped with an antenna, First glass layer; A metal thin film layer disposed on top of the first glass layer and having an antenna pattern; and It includes a ground layer disposed below the first glass layer, and The above antenna pattern is, A monopole antenna pattern that extends longitudinally and radiates a signal in a predetermined reference frequency band; A first square parasitic pattern disposed spaced apart from the monopole antenna pattern on a first transverse side of the monopole antenna pattern and radiating a first frequency band signal higher than the reference frequency band; A second square parasitic pattern spaced apart from the monopole antenna pattern and positioned longitudinally at a different position from the first square parasitic pattern on the second transverse side of the monopole antenna pattern, and radiating a second frequency band signal lower than the reference frequency band; and At least one CPW feed patch for coplanar waveguide (CPW) feeding; comprising, The above antenna pattern is fed in a CPWG (Coplanar waveguide with ground) manner using the ground layer and CPW feed patch, Vehicle glass equipped with an antenna.

2. In Paragraph 1, The above ground layer is, The longitudinal positions of at least one CPW feed patch are arranged so that they overlap only with some of the longitudinal positions, and The region where the longitudinal position of the ground layer of the above at least one CPW feed patch does not overlap performs feeding to the antenna pattern in a CPW manner. Vehicle glass equipped with an antenna.

3. In Paragraph 2, The above ground layer is, A metal support panel for installing glass of a vehicle in which the above-mentioned vehicle glass is installed, Vehicle glass equipped with an antenna.

4. In Paragraph 2, Vehicle glass equipped with the above antenna, having a metal frame on at least one side, Vehicle glass equipped with an antenna.

5. In Paragraph 4, The above metal frame is, A frame for installing glass of a vehicle on which the above-mentioned vehicle glass is installed, comprising at least one of an A-pillar, a B-pillar, and a C-pillar, Vehicle glass equipped with an antenna.

6. In Paragraph 4, The above-mentioned at least one CPW feed patch is, A coupling suppression region comprising a plurality of longitudinal slots to suppress electrical coupling between the metal frame and the antenna pattern, Vehicle glass equipped with an antenna.

7. In Paragraph 6, The above plurality of longitudinal slots are, A longitudinal position disposed at a longitudinal position including a longitudinal end position of the ground layer, Vehicle glass equipped with an antenna.

8. In Paragraph 1, The above-mentioned vehicle glass is, A polymer bonding layer disposed on top of the metal thin film layer; and A double-bonded glass further comprising: a second glass layer bonded to the first glass layer and the metal thin film layer by the polymer bonding layer; Vehicle glass equipped with an antenna.

Images