Antenna module configured in vehicle

Abstract

The antenna assembly comprises a first layer, a second layer and a third layer, wherein the first layer is formed by a dielectric substrate which is formed by a transparent dielectric material; and a second layer formed in the shape of a metal mesh on one surface of the dielectric substrate. The second layer may include: a metal mesh radiator region configured from a metal wire and an open region, the metal wire having an irregular mesh shape having a predetermined line width or less to transmit and receive a wireless signal; and a dummy metal mesh region configured from a slit and a metal wire that achieves an irregular mesh shape having a predetermined line width or less.

Description

Technical Field

[0001] The present disclosure relates to a transparent antenna configured for a vehicle. Certain embodiments relate to an antenna assembly implemented with a transparent material so that the antenna area cannot be identified on the vehicle glass. Background Art

[0002] Vehicles can perform wireless communication services with other vehicles or surrounding objects, infrastructure or base stations. In this regard, a variety of communication services can be provided by a wireless communication system that applies LTE communication technology or 5G communication technology. On the other hand, a portion of the LTE frequency band can be allocated to provide 5G communication services.

[0003] On the other hand, since the vehicle body and the roof are formed of metal materials, there is a problem of blocking radio waves. Therefore, an additional antenna structure can be arranged on the upper part of the vehicle body or the roof. Alternatively, when the antenna structure is arranged on the lower part of the vehicle body or the roof, the part of the vehicle body or the roof corresponding to the antenna arrangement area can be formed of a non-metallic material.

[0004] However, from the design point of view, the vehicle body or the roof needs to be formed in one piece. In this case, the appearance of the vehicle body or the roof may be formed of a metal material. Therefore, there is a problem that the vehicle body or the roof may cause the antenna efficiency to be greatly reduced.

[0005] In order to increase the communication capacity without changing the exterior design of the vehicle, a transparent antenna can be placed on the glass of the vehicle window. However, there is a problem that the electrical loss of the transparent material antenna deteriorates the antenna radiation efficiency and impedance bandwidth characteristics.

[0006] If an antenna pattern is formed on a dielectric substrate using a metal mesh structure in which a plurality of metal wires are connected to each other, a transparent antenna in which the metal wires cannot be distinguished by the naked eye can be realized. However, if a metal mesh structure is not formed in a dielectric region surrounding an antenna region in which an antenna pattern is formed, there is a problem that a difference in visibility occurs because the antenna region and the dielectric region can be distinguished by the naked eye.

[0007] In order to solve this problem, a dummy grid may be arranged in the dielectric region. However, the arrangement of the dummy grid interferes with the antenna pattern, so there is a problem that the antenna performance is degraded.

[0008] On the other hand, when a transparent material antenna is arranged on the vehicle glass, the transparent antenna pattern can be configured to be electrically connected to a feeding pattern arranged on an additional dielectric substrate. In this regard, feeding loss and degradation of antenna performance caused by the connection between the transparent antenna pattern and the feeding pattern may occur. In addition, a transparency difference may occur between a transparent region (transparent region) formed with a transparent antenna pattern and an opaque region (opaque region) formed with a feeding pattern. Due to this transparency difference, the area where the antenna is arranged and other areas can be visually distinguished. Despite this transparency difference, there is still a need for a technical solution for minimizing the visibility difference between the antenna area and other areas in the vehicle glass. Summary of the invention

[0009] Problem to be solved

[0010] The present specification aims to solve the above problems and other problems. In addition, another object of the present invention is to provide an antenna assembly implemented with a transparent material so that the antenna area and the dielectric area cannot be distinguished by the eyes.

[0011] Still another object of the present specification is to minimize the difference in visibility between a region where the antenna is provided with a transparent material and other regions.

[0012] Another object of the present specification is to minimize the interference between the virtual grid configured in the dielectric area and the antenna area.

[0013] Yet another object of the present specification is to ensure the invisibility of a transparent antenna and an antenna assembly including the same without deteriorating the antenna performance.

[0014] Another object of the present specification is to ensure invisibility with respect to the shape of the antenna assembly and to ensure invisibility when the antenna assembly is attached to a display or glass.

[0015] Yet another object of the present specification is to improve visibility in a transparent antenna without degradation of antenna performance through optimal design of a dummy pattern with open areas.

[0016] Still another object of the present specification is to provide a broadband antenna structure of a transparent material that not only operates in a broadband but also can reduce feed loss and improve antenna efficiency.

[0017] Technical solutions to the problem

[0018] The antenna assembly of the present specification for achieving the above or other purposes includes: a first layer, which is implemented by a dielectric substrate formed by a transparent dielectric material; and a second layer, which is formed in a metal mesh shape on one side of the dielectric substrate. The second layer may include: a metal mesh radiator region, which is composed of metal wires and open areas that realize an irregular mesh shape below a specified line width to transmit and receive wireless signals; and a dummy metal mesh region, which is composed of metal wires and slits that realize an irregular mesh shape below a specified line width.

[0019] In an embodiment, the metal mesh radiator area can be formed with a first transmittance, and the virtual metal mesh area can be formed with a second transmittance higher than the first transmittance. The virtual metal mesh area can be formed with a gap separated from the outer contour area of ​​the metal mesh radiator area. The irregular grid shape of the virtual metal mesh area overlapping with the virtual cut lines formed along the two-axis direction can form an open area. The virtual cut lines and the polygons formed by the metal lines of the irregular grid shape can be formed to overlap in the line width region equivalent to the interior of the polygon. The virtual cut lines can be formed at equidistant intervals in the virtual metal mesh area.

[0020] In an embodiment, the first transmittance of the metal mesh radiator region may be greater than 80%. The second transmittance of the virtual metal mesh region may be greater than 82%. The sheet resistance of the metal mesh radiator region may be less than 1Ω(ohm) / sq.

[0021] In an embodiment, the difference between the first transmittance of the metal mesh radiator region and the second transmittance of the virtual metal mesh region may be less than 2%. A portion of the boundary of the virtual metal mesh region and the boundary of the metal mesh radiator region may be separated by a gap. The boundary of the virtual metal mesh region and the boundary of the metal mesh radiator region may be less than 200um.

[0022] In an embodiment, the line width of the dummy pattern in the dummy metal mesh area may be 5.2um to 5.4um, and the thickness of the dummy pattern in the dummy metal mesh area may be 6.0um to 6.3um.

[0023] In an embodiment, the antenna pattern realized by the metal mesh radiator region can operate in an operating frequency band of 800 MHz to 3000 MHz. The interval of the virtual break lines in the virtual metal mesh region can be set to less than 1 / 10 of the wavelength. 3000 MHz in the operating frequency band of the antenna pattern can be set as the reference frequency, and the interval of the virtual break lines can be set to less than 10 mm.

[0024] In an embodiment, in the case where a pitch of the metal lines of the irregular mesh shape is formed in a range of 100 to 150 um, a sheet resistance of the irregular mesh shape may be formed in a range of 0.47 to 0.89 Ω / sq.

[0025] In an embodiment, the dummy pattern of the dummy metal mesh area may be configured to be disconnected in the longitudinal and transverse directions. The coupling between the antenna pattern implemented by the metal mesh radiator area and the dummy pattern configured to be disconnected in the longitudinal and transverse directions may be reduced compared to the second coupling between the antenna pattern and the dummy patterns connected to each other.

[0026] In an embodiment, a boundary of the dummy pattern may be disconnected from a boundary of the metal line of the metal mesh radiator region at an interval of less than 100 um.

[0027] In an embodiment, in the virtual metal mesh area, the vertical virtual break lines may be separated by a second interval in the horizontal direction, and the horizontal virtual break lines may be separated by a first interval in the vertical direction. The first interval and the second interval may be set to be greater than the interval between the boundary of the virtual metal mesh area and the boundary of the metal mesh radiator area.

[0028] In an embodiment, a first region of the dummy metal mesh region within a predetermined interval from a boundary of the metal mesh radiator region may form an open dummy region having slits interrupted by the irregular mesh shape.

[0029] In an embodiment, a second region of the dummy metal mesh region that is at a predetermined distance from a boundary of the metal mesh radiator region may form a closed dummy region in which the irregular mesh shapes are connected to each other.

[0030] In an embodiment, the prescribed interval may be set to 1 / 4 to 1 / 2 of a wavelength corresponding to an upper limit frequency of an operating frequency of the antenna pattern implemented by the metal mesh radiator region.

[0031] The antenna assembly of another aspect of the present specification includes: a first layer, implemented as a dielectric substrate formed of a transparent dielectric material; and a second layer, formed in a metal mesh shape on one side of the dielectric substrate, including a first area and a second area formed adjacent to the first area. The second layer may include: a metal mesh radiator region, composed of metal wires and open areas that implement an irregular mesh shape below a specified line width to transmit and receive wireless signals; a dummy metal mesh region, composed of metal wires and slits that implement an irregular mesh shape below a specified line width; and a connector portion, configured to be connected to the metal mesh radiator region to transmit signals.

[0032] In an embodiment, the first transmittance of the metal mesh radiator region may be greater than 80%. The second transmittance of the virtual metal mesh region may be greater than 82%. The sheet resistance of the metal mesh radiator region may be less than 1Ω(ohm) / sq.

[0033] In an embodiment, the difference between the first transmittance of the metal mesh radiator region and the second transmittance of the virtual metal mesh region may be less than 2%. A portion of the boundary of the virtual metal mesh region and the boundary of the metal mesh radiator region may be separated by a gap. The boundary of the virtual metal mesh region and the boundary of the metal mesh radiator region may be less than 200um.

[0034] In an embodiment, the metal mesh radiator region and the virtual metal mesh region may form the first region, and the connector portion may form the second region. The metal mesh radiator region may be formed with a first transmittance, and the virtual metal mesh region may be formed with a second transmittance higher than the first transmittance. The connector portion may be formed with a third transmittance lower than the first transmittance. The virtual metal mesh region may be formed with a gap separated from the outer contour region of the metal mesh radiator region.

[0035] In an embodiment, the irregular mesh shape of the virtual metal mesh area overlapping with the virtual cut lines formed along the two-axis direction can form an open area. The virtual cut lines and the polygon formed by the metal lines of the irregular mesh shape can be formed to overlap in a linewidth region equivalent to the inside of the polygon. The virtual cut lines can be formed at equidistant intervals in the virtual metal mesh area.

[0036] In an embodiment, the line width of the dummy pattern in the dummy metal mesh area may be 5.2um to 5.4um, and the thickness of the dummy pattern in the dummy metal mesh area may be 6.0um to 6.3um.

[0037] In an embodiment, the antenna pattern realized by the metal mesh radiator region can operate in an operating frequency band of 800 MHz to 3000 MHz. The interval of the virtual break lines in the virtual metal mesh region can be set to less than 1 / 10 of the wavelength. 3000 MHz of the operating frequency band of the antenna pattern can be set as the reference frequency, and the interval of the virtual break lines can be set to less than 10 mm.

[0038] In an embodiment, in the case where a pitch of the metal lines of the irregular mesh shape is formed in a range of 100 to 150 um, a sheet resistance of the irregular mesh shape may be formed in a range of 0.47 to 0.89 Ω / sq.

[0039] In an embodiment, the dummy pattern of the dummy metal mesh area may be configured to be disconnected in the longitudinal and transverse directions. The coupling between the antenna pattern implemented by the metal mesh radiator area and the dummy pattern configured to be disconnected in the longitudinal and transverse directions may be reduced compared to the second coupling between the antenna pattern and the dummy patterns connected to each other.

[0040] In an embodiment, a boundary of the dummy pattern may be disconnected from a boundary of the metal line of the metal mesh radiator region at an interval of less than 100 um.

[0041] In an embodiment, in the virtual metal mesh area, the vertical virtual break lines may be separated by a second interval in the horizontal direction, and the horizontal virtual break lines may be separated by a first interval in the vertical direction. The first interval and the second interval may be set to be greater than the interval between the boundary of the virtual pattern and the boundary of the metal line.

[0042] In an embodiment, a first region of the dummy metal mesh region within a predetermined interval from a boundary of the metal mesh radiator region may form an open dummy region having slits interrupted by the irregular mesh shape.

[0043] In an embodiment, a second region of the dummy metal mesh region that is at a predetermined distance from a boundary of the metal mesh radiator region may form a closed dummy region in which the irregular mesh shapes are connected to each other.

[0044] In an embodiment, the prescribed interval may be set to 1 / 4 to 1 / 2 of a wavelength corresponding to an upper limit frequency of an operating frequency of the antenna pattern implemented by the metal mesh radiator region.

[0045] Effects of the Invention

[0046] Next, the technical effects of the transparent antenna disposed in the vehicle as described above will be described.

[0047] According to the present specification, an antenna component implemented with a transparent material can be constructed in an optimal manner, so that the antenna area and the surrounding dielectric area cannot be distinguished in the transparent antenna structure.

[0048] According to the present specification, an open virtual region having a slit is formed in the dielectric region, thereby minimizing the difference in visibility between the region where the antenna of the transparent material is arranged and other regions.

[0049] According to the present specification, the boundary of the antenna region and the boundary of the dummy pattern region are separated by a prescribed interval, thereby making it possible to ensure the invisibility of the transparent antenna and the antenna assembly including the same without deteriorating the antenna performance.

[0050] According to the present specification, an open dummy structure is formed as a cross point of a metal line of a dummy region or a portion of a metal line is disconnected, thereby ensuring the invisibility of a transparent antenna and an antenna assembly including the same without deteriorating or reducing antenna performance.

[0051] According to the present specification, virtual disconnection lines formed along two axis directions are formed so that metal lines of a virtual area can be disconnected, thereby ensuring the invisibility of the transparent antenna and the antenna assembly including the same without deteriorating the antenna performance.

[0052] According to the present specification, through a virtual disconnection line structure that can be implemented in various structures and shapes, it is possible to ensure invisibility of a transparent antenna and an antenna assembly including the same without deteriorating antenna performance.

[0053] According to the present specification, a transparent antenna having excellent transparency and sheet resistance characteristics can be realized without deteriorating antenna performance by using an irregular metal mesh structure that can be realized in various structures and shapes.

[0054] According to the present specification, visibility can be improved without antenna performance degradation in a transparent antenna through optimal design of a slit having a dummy pattern of an open area and an open area with a radiator area.

[0055] According to the present specification, a broadband antenna structure made of a transparent material that can operate in a broadband, reduce feed loss, and improve antenna efficiency can be provided through vehicle glass or a display area of ​​an electronic device.

[0056] According to the present specification, it is possible to provide a transparent antenna structure that can wirelessly communicate in 4G and 5G frequency bands while minimizing antenna performance variations and transparency differences between an antenna area and a surrounding area.

[0057] According to the present specification, it is possible to provide a transparent antenna structure capable of wireless communication in the millimeter wave frequency band while minimizing antenna performance variation and a transparency difference between an antenna region and a surrounding region.

[0058] The following detailed description will further clarify the scope of the additional application of this specification. However, since a person skilled in the art can clearly understand the various changes and modifications within the concept and scope of the present invention, it should be understood that the specific embodiments of the preferred embodiments described in detail and this specification are only examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 FIG. 1 is a diagram showing glass of a vehicle on which an antenna structure according to an embodiment of the present specification can be arranged.

[0060] Figure 2a Indicated in Figure 1 A front view of a vehicle in which antenna assemblies are disposed at different regions of a front glass of the vehicle.

[0061] Figure 2b Indicated in Figure 1 A perspective view of the interior front of a vehicle in which antenna assemblies are arranged at different areas of a front glass of the vehicle.

[0062] Figure 2c Indicated in Figure 1 A side perspective view of a vehicle with an antenna assembly configured on an upper glass of the vehicle.

[0063] Figure 3 Indicates the type of V2X application.

[0064] Figure 4This is a block diagram for explaining a vehicle and an antenna system mounted on the vehicle according to an embodiment of the present specification.

[0065] Figure 5a to Figure 5c This specification shows a configuration in which the antenna assembly is disposed on a vehicle glass.

[0066] Figure 6a and Figure 6b This shows a configuration in which the metal mesh structure of this specification is arranged on a dielectric substrate.

[0067] Figure 7a Showing the front view and cross-sectional view of the transparent antenna assembly of the present specification.

[0068] Figure 7b It is a diagram showing the mesh structure of the metal mesh radiator area and the virtual metal mesh area according to the embodiment.

[0069] Figure 8a This shows an antenna assembly including an antenna pattern portion and a dummy pattern portion in this specification.

[0070] Figure 8b Indicates that Figure 8a FIG. 1 is an enlarged view of a boundary area between an antenna pattern portion and a dummy pattern portion.

[0071] Fig. 9 Schematic diagram showing a layered structure of an antenna assembly according to an embodiment.

[0072] Fig.10 The structure in which a metal mesh radiator region and a dummy metal mesh region are formed in a layered structure on an upper portion of a dielectric substrate formed with a transparent material substrate and metal lines are formed in a double-sided blackened structure.

[0073] Fig.11 Indicates the transmittance and sheet resistance according to the line width, line height and pitch of various types of metal mesh structures.

[0074] Fig.12 A metal mesh structure having a specified length, line width, and disconnected portions where metal lines are disconnected.

[0075] Fig.13a and Fig.13b Indicates a virtual break line structure and a structure formed with virtual break lines and virtual patterns.

[0076] Fig.14 Various modifications of the virtual break line shapes according to the embodiment are shown.

[0077] Figures 15a to 15c It shows a structure in which a virtual break line is rotated, moved in parallel, and scaled according to an embodiment.

[0078] Fig.16aand Fig.16b A transparent antenna structure is shown in which a signal is applied to a radiation conductor portion of a transparent region through a feeder in an opaque region according to an embodiment with or without a dummy pattern.

[0079] Fig.17a and Fig.17b Yes Fig.16b An enlarged view of the radiating conductor portion in the transparent antenna structure.

[0080] Fig.18a This is a graph comparing the reflection coefficients when only a radiation conductor is arranged without a dummy pattern and when a closed dummy area is formed. Fig.18b This is a diagram comparing the reflection coefficients that change as the intervals between adjacent dummy patterns change.

[0081] Fig.19a All virtual cells of the embodiment are formed into a virtual grid structure with disconnected portions. Fig.19b This is a diagram comparing the antenna efficiency of a transparent antenna without a dummy pattern and a transparent antenna with a closed dummy area formed therein. Fig.19c This is a diagram comparing antenna efficiencies according to the intervals at which disconnected portions are formed in a dummy pattern.

[0082] Figures 20a to 20c 1 is a diagram showing a radiating conductor portion and a magnetic field distribution in the surrounding area according to the embodiment.

[0083] Fig.21 Indicated in Fig.16b In the transparent antenna structure, a first dummy pattern and a second dummy pattern are arranged around the antenna pattern.

[0084] Fig. 22 It means in Fig.21 A graph showing the reflection coefficient characteristics and antenna efficiency characteristics that change depending on the starting position of the closed virtual pattern in the antenna structure.

[0085] Fig.23a and Figure 23b A transparent antenna structure of a CPW feeding method that also operates in the Sub6 frequency band is shown in addition to the structure of the embodiment.

[0086] Fig.24a According to Fig.23a and Figure 23b Antenna efficiency and transparency of the antenna structure.

[0087] Figure 24b FIG. 4 shows the antenna efficiency according to the interval between the disconnected lines in the transparent antenna structure that also operates as an antenna in the Sub6 band according to the embodiment.

[0088] Fig.25The present invention shows a configuration in which a plurality of antenna modules disposed at different positions on a vehicle glass are combined with other components of the vehicle. DETAILED DESCRIPTION

[0089] The embodiments disclosed in this specification are described in detail below with reference to the accompanying drawings. Here, the same or similar constituent elements are given the same figure marks regardless of the figure numbers, and repeated descriptions thereof will be omitted. The suffixes "module" and "unit" used in the following description for the constituent elements are only given or mixed for the convenience of writing the specification, and they themselves do not have mutually distinguishing meanings or functions. In addition, in the process of describing the embodiments disclosed in this specification, if it is determined that the specific description of the relevant known technology will cause confusion with the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only for the purpose of facilitating the understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification should not be limited by the attached drawings, but should be understood as covering all changes, equivalents and even substitutes included in the ideas and technical scope of the present invention.

[0090] Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from other components.

[0091] If a certain component is mentioned as being "connected" or "coupled" to another component, it may be directly connected to or coupled to the other component, but it can also be understood that there are other components between them. Conversely, if a certain component is mentioned as being "directly connected" or "directly coupled" to another component, it should be understood that there are no other components between them.

[0092] Unless the context clearly indicates otherwise, expressions in the singular shall include expressions in the plural.

[0093] In the present application, terms such as "including" or "having" are only used to specify the existence of features, numbers, steps, operations, constituent elements, parts or their combinations recorded in the specification, and are not intended to preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, constituent elements, parts or their combinations.

[0094] The antenna system described in this specification can be mounted on a vehicle. The configuration and operation of the embodiments described in this specification can also be applied to a communication system, i.e., an antenna system, mounted on a vehicle. In this regard, the antenna system mounted on a vehicle may include a plurality of antennas and a transceiver circuit and a processor for controlling the plurality of antennas.

[0095] Hereinafter, an antenna assembly (antenna module) that can be placed on a vehicle window and a vehicle antenna system including the antenna assembly are described. Herein, the antenna assembly refers to a structure in which a conductive pattern is bonded to a dielectric substrate, and may also be referred to as an antenna module.

[0096] Regarding this, Figure 1 FIG. 1 is a diagram showing a glass of a vehicle on which an antenna structure can be configured according to an embodiment of the present specification. Figure 1 The vehicle 500 may include a front glass panel 310, a door glass 320, a rear glass 330, and a corner window glass 340. On the other hand, the vehicle 500 may further include an upper glass 350 formed at a roof in an upper region.

[0097] Therefore, the glass constituting the window of the vehicle 500 may include a front glass panel 310 arranged in the front area of ​​the vehicle, a door glass 320 arranged in the door area of ​​the vehicle, and a rear glass 330 arranged in the rear area of ​​the vehicle. On the other hand, the glass constituting the window of the vehicle 500 may also include a corner window glass 340 arranged in a part of the door area of ​​the vehicle. In addition, the glass constituting the window of the vehicle 500 may also include an upper glass 350, which is separated from the rear glass 330 and is arranged in the upper area of ​​the vehicle. Therefore, each glass constituting the window of the vehicle 500 may also be referred to as a window.

[0098] The front glass panel 310 prevents the wind from the front direction from blowing into the interior of the vehicle, and thus can be called a front windshield. The front glass panel 310 can be formed in a double-layer joint structure with a thickness of about 5.0 to 5.5 mm. The front glass panel 310 can be formed in a joint structure of glass / anti-shatter film / glass.

[0099] The door glass 320 may be formed of a double-layered joint structure or a single-layered compressed glass. The rear glass 330 may be formed of a double-layered joint structure or a single-layered compressed glass having a thickness of about 3.5 to 5.5 mm. In the rear glass 330, a distance is required between the hot wire, the AM / FM antenna, and the transparent antenna. The corner window glass 340 may be formed of a single-layered compressed glass having a thickness of about 3.5 to 4.0 mm, but is not limited thereto.

[0100] The size of the corner window glass 340 varies according to the type of vehicle, and the size of the corner window glass 340 may be smaller than the size of the front glass panel 310 and the size of the rear glass 330 .

[0101] Hereinafter, the structure in which the antenna assembly of this specification is arranged in different regions of the front glass of the vehicle will be described. The antenna assembly attached to the vehicle glass can be implemented as a transparent antenna. Figure 2a Indicated in Figure 1 A front view of a vehicle in which antenna assemblies are disposed at different regions of a front glass of the vehicle. Figure 2b Indicated in Figure 1 A perspective view of the interior front of a vehicle in which antenna assemblies are arranged at different areas of a front glass of the vehicle. Figure 2c Indicated in Figure 1 A side perspective view of a vehicle with an antenna assembly configured on an upper glass of the vehicle.

[0102] Reference Figure 2a , a front view of a vehicle 500 shows a configuration of a transparent antenna for a vehicle that can be configured with the present specification. A pane assembly 22 may include an antenna in an upper region 310a. The pane assembly 22 may include an antenna in an upper region 310a, an antenna in a lower region 310b, and / or an antenna in a side region 310c. In addition, the pane assembly 22 may include a translucent pane glass 26 formed of a dielectric substrate. The antenna in the upper region 310a, the antenna in the lower region 310b, and / or the antenna in the side region 310c are configured to support at least one of various communication systems.

[0103] The antenna module 1100 can be implemented in the upper area 310a, or the lower area 310b or the side area 310c of the front glass panel 310. In the case where the antenna module 1100 is configured in the lower area 310b of the front glass panel 310, the antenna module 1100 can be extended to the main body 49 of the lower area of ​​the translucent window glass 26. The main body 49 of the lower area of ​​the translucent window glass 26 can be implemented to have lower transparency than other parts. In the main body 49 of the lower area of ​​the translucent window glass 26, a part of the feed part or other interface lines can be implemented. The connector assembly 74 can be implemented in the main body 49 of the lower area of ​​the translucent window glass 26. The main body 49 of the lower area can constitute a vehicle body of a metal material.

[0104] Reference Figure 2b The antenna assembly 1000 may include a telematics control unit (TCU) 300 and an antenna module 1100. The antenna module 1100 may be disposed in different regions of the vehicle glass.

[0105] Reference Figure 2a and Figure 2b , the upper area 310a, the lower area 310b and / or the side area 310c of the vehicle glass may be configured with an antenna assembly. Figure 2a to Figure 2c Antenna assemblies may be provided on the front glass panel 310 , the rear glass 330 , the corner window glass 340 , and the upper glass 350 of the vehicle.

[0106] Reference Figure 2a to Figure 2c , the antenna in the upper area 310a of the front glass panel 310 of the vehicle can be configured to operate in the LB (low band), MB (mid band), HB (high band) and 5G Sub6 bands of the 4G / 5G communication system. The antenna in the lower area 310b and / or the antenna in the side area 310c can also be configured to operate in the LB, MB, HB and 5G Sub6 bands of the 4G / 5G communication system. In the rear glass 330 of the vehicle, the antenna structure 1100b can also be configured to operate in the LB, MB, HB and 5G Sub6 bands of the 4G / 5G communication system. In the upper glass 350 of the vehicle, the antenna structure 1100c can also be configured to operate in the LB, MB, HB and 5G Sub6 bands of the 4G / 5G communication system. In the corner window glass 350 of the vehicle, the antenna structure 1100d can also be configured to operate in the LB, MB, HB and 5G Sub6 bands of the 4G / 5G communication system.

[0107] At least a portion of the outer contour area of ​​the front glass panel 310 of the vehicle may be formed by the translucent window glass 26. The translucent window glass 26 may include: a first portion, formed with a portion of the antenna and the feeder; and a second portion, formed with a portion of the feeder and a dummy structure. In addition, the translucent window glass 26 may also include a dummy area where no conductive pattern is formed. As an example, the transparent area of ​​the window glass assembly 22 may be formed to be transparent to ensure light transmission and field of view.

[0108] Although the example in which the conductive pattern can be formed in a part of the front glass panel 310 is described, it can be extended to be formed in Figure 1 The side glass 320, the rear glass 330 and any other glass structures of the vehicle 500 can be seen by a passenger or a driver through the window glass assembly 22. In addition, the passenger or the driver can see the road and the surrounding environment without being obstructed by the antenna of the upper area 310a, the antenna of the lower area 310b and / or the antenna of the side area 310c.

[0109] Vehicle 500 may be configured to communicate with pedestrians, surrounding infrastructure, and / or servers in addition to surrounding vehicles. Figure 3 Indicates the type of V2X application. Figure 3V2X (Vehicle-to-Everything) communication includes V2V (Vehicle-to-Vehicle) which refers to the communication between vehicles, V2I (Vehicle to Infrastructure) which refers to the communication between vehicles and eNB or RSU (Road Side Unit), V2P (Vehicle-to-Pedestrian) which refers to the communication between vehicles and terminals carried by individuals (pedestrians, cyclists, vehicle drivers or passengers), V2N (vehicle-to-network), and other communications between vehicles and all individuals.

[0110] on the other hand, Figure 4 This is a block diagram for explaining a vehicle and an antenna system mounted on the vehicle according to an embodiment of the present specification.

[0111] The vehicle 500 may include a communication device 400 and a processor 570. The communication device 400 may correspond to a telematics control unit of the vehicle 500.

[0112] The communication device 400 is a device for performing communication with an external device. Here, the external device may be another vehicle, a mobile terminal or a server. In order to perform communication, the communication device 400 may include at least one of a transmitting antenna, a receiving antenna, an RF (Radio Frequency) circuit and an RF element capable of implementing various communication protocols. The communication device 400 may include a short-range communication unit 410, a location information unit 420, a V2X communication unit 430, an optical communication unit 440, a 4G wireless communication module 450 and a 5G wireless communication module 460. The communication device 400 may include a processor 470. According to an embodiment, the communication device 400 may also include other constituent elements in addition to the described constituent elements, or may not include a part of the described constituent elements.

[0113] The 4G wireless communication module 450 and the 5G wireless communication module 460 can perform wireless communication with more than one communication system through one or more antenna modules. The 4G wireless communication module 450 can send and / or receive signals with a device in the first communication system through a first antenna module. In addition, the 5G wireless communication module 460 can send and / or receive signals with a device in the second communication system through a second antenna module. The 4G wireless communication module 450 and the 5G wireless communication module 460 can also be physically implemented as an integrated communication module. Here, the first communication system can be an LTE communication system, and the second communication system can be a 5G communication system. However, the first communication system and the second communication system are not limited to this, and can be extended to any communication system that is different from each other.

[0114] The processor of the device in the vehicle 500 can be implemented by an MCU (Micro Control Unit) or a modem. The processor 470 of the communication device 400 is equivalent to a modem, and the processor 470 can be implemented as an integrated modem. The processor 470 can obtain surrounding information from other surrounding vehicles, objects, or infrastructure through wireless communication. The processor 470 can use the acquired surrounding information to perform vehicle control.

[0115] The processor 570 of the vehicle 500 may be a processor of a CAN (Car Area Network) or an ADAS (Advanced Driver Assistance System), but is not limited thereto. When the vehicle 500 is implemented in a distributed control manner, the processor 570 of the vehicle 500 may be replaced by a processor of each device.

[0116] On the other hand, the antenna module configured inside the vehicle 500 may include a wireless communication unit. The 4G wireless communication module 450 can transmit and receive 4G signals with a 4G base station through a 4G mobile communication network. At this time, the 4G wireless communication module 450 can transmit more than one 4G transmission signal to the 4G base station. In addition, the 4G wireless communication module 450 can receive more than one 4G reception signal from the 4G base station. In this regard, uplink (UL: Up-Link) multiple-input multiple-output (MIMO: Multi-Input Multi-Output) can be performed by transmitting a plurality of 4G transmission signals to the 4G base station. In addition, downlink (DL: Down-Link) multiple-input multiple-output (MIMO: Multi-Input Multi-Output) can be performed by receiving a plurality of 4G reception signals from the 4G base station.

[0117] The 5G wireless communication module 460 can transmit and receive 5G signals with the 5G base station through the 5G mobile communication network. Here, the 4G base station and the 5G base station can be non-independent (NSA: Non-Stand-Alone) structures. For example, the 4G base station and the 5G base station can be configured as a non-independent (NSA: Non Stand-Alone) structure. Alternatively, the 5G base station can be configured as an independent (SA: Stand-Alone) structure at a location different from the 4G base station. The 5G wireless communication module 460 can transmit and receive 5G signals with the 5G base station through the 5G mobile communication network. At this time, the 5G wireless communication module 460 can transmit more than one 5G transmission signal to the 5G base station. In addition, the 5G wireless communication module 460 can receive more than one 5G reception signal from the 5G base station. At this time, the 5G frequency band can use the same frequency band as the 4G frequency band, and it is called LTE reconfiguration (re-farming). On the other hand, as a 5G frequency band, the Sub6 frequency band, which is a frequency band below 6GHz, can be used. On the contrary, in order to perform broadband high-speed communication, the millimeter wave (mmWave) frequency band can be used as the 5G frequency band. In the case of using the millimeter wave (mmWave) frequency band, electronic devices can perform beam forming to expand the communication coverage with the base station.

[0118] On the other hand, regardless of the 5G frequency band, in order to increase the transmission speed, a larger number of multiple-input multiple-output (MIMO) can be supported in the 5G communication system. In this regard, uplink (UL: Up-Link) MIMO can be performed by transmitting a plurality of 5G transmission signals to a 5G base station. In addition, downlink (DL: Down-Link) MIMO can be performed by receiving a plurality of 5G reception signals from a 5G base station.

[0119] On the other hand, through the 4G wireless communication module 450 and the 5G wireless communication module 460, it is possible to be in a dual connection (DC: Dual Connectivity) state with the 4G base station and the 5G base station. The dual connection with the 4G base station and the 5G base station as described above may be referred to as EN-DC (EUTRAN NR DC; Evolved Universal Terrestrial Radio Access Network New Wireless Dual Connection). On the other hand, if the 4G base station and the 5G base station are co-located structures, the throughput can be improved by heterogeneous carrier aggregation (inter-CA (Carrier Aggregation)). Therefore, if the 4G base station and the 5G base station are in the EN-DC state, the 4G reception signal and the 5G reception signal can be received simultaneously by the 4G wireless communication module 450 and the 5G wireless communication module 460. On the other hand, the 4G wireless communication module 450 and the 5G wireless communication module 460 can be used to perform close range communication between electronic devices (e.g., vehicles). In one embodiment, wireless communication can be performed in a V2V manner between vehicles without via a base station after resources are allocated.

[0120] On the other hand, in order to improve the transmission speed and converge the communication system, at least one of the 4G wireless communication module 450 and the 5G wireless communication module 460 and the Wi-Fi (Wireless High Fidelity) communication module 113 may be used to perform carrier aggregation (CA). In this regard, 4G+WiFi carrier aggregation (CA) may be performed using the 4G wireless communication module 450 and the Wi-Fi communication module 113. Alternatively, 5G+WiFi carrier aggregation (CA) may be performed using the 5G wireless communication module 460 and the Wi-Fi communication module.

[0121] On the other hand, the communication device 400 may realize a vehicle display device together with the user interface device. In this case, the vehicle display device may be named a telematics device or an AVN (Audio Video Navigation) device.

[0122] On the other hand, the broadband transparent antenna structure that can be configured on the glass of a vehicle of the present specification can be implemented by a single dielectric substrate on the same plane as the CPW feeder. In addition, the broadband transparent antenna structure that can be configured on the glass of a vehicle of the present specification can be implemented with a structure in which grounding is formed on both sides of the radiator, thereby forming a broadband structure.

[0123] The following describes the antenna components related to the broadband transparent antenna structure of this specification. Figure 5a to Figure 5cThis shows the configuration in which the antenna assembly of this specification is disposed on the vehicle glass. Figure 5a , the antenna assembly 1000 may include a first dielectric substrate 1010a and a second dielectric substrate 1010b. The first dielectric substrate 1010a may be implemented as a transparent substrate, and thus may be referred to as a transparent substrate 1010a. The second dielectric substrate 1010b may be implemented as an opaque substrate 1010b.

[0124] The glass panel 310 may include a transparent glass region 311 and an opaque region 312. The opaque region 312 of the glass panel 310 may be a frit region formed by a frit layer. The opaque region 312 may be formed to surround the transparent region 311. The opaque region 312 may be formed in an outer region of the transparent region 311. The opaque region 312 may form a boundary region of the glass panel 310.

[0125] The signal pattern formed on the dielectric substrate 1010 can be connected to the telematics control unit (TCU) 300 through a connector component 313 such as a coaxial cable. The telematics control unit (TCU) 300 can be configured inside the vehicle, but is not limited thereto. The telematics control unit (TCU) 300 can be configured in the dashboard inside the vehicle or in the roof area inside the vehicle, but is not limited thereto.

[0126] Figure 5b The antenna assembly 1000 is shown as being disposed in a partial region of the glass panel 310 . Figure 5c The structure in which the antenna assembly 1000 is arranged over the entire area of ​​the glass panel 310 is shown.

[0127] Reference Figure 5b and Figure 5c, the glass panel 310 may include a transparent area 311 and an opaque area 312. The opaque area 312 is a non-visible area whose transparency is below a specified level, and may be referred to as a frit area, or a BP (Black Printing) area, or a BM (Black Matrix) area. The opaque area 312, which is equivalent to the opaque area, may be formed to surround the transparent area 311. The opaque area 312 may be formed in an outer area of ​​the transparent area 311. The opaque area 312 may form a boundary area of ​​the glass panel 310. A second dielectric substrate 1010b or a heat plate 360a, 360b, which is equivalent to a feed substrate, may be arranged in the opaque area 312. The second dielectric substrate 1010b arranged in the opaque area 312 may be referred to as an opaque substrate. As Figure 5c As shown, when the antenna assembly 1000 is disposed on the entire area of ​​the glass panel 310 , the heating plates 360 a and 360 b may be disposed in the opaque area 312 .

[0128] Reference Figure 5b , the antenna assembly 1000 may include a first transparent dielectric substrate 1010a and a second dielectric substrate 1010b. Figure 5b and Figure 5c , the antenna assembly 1000 may include an antenna module 1100 formed of a conductive pattern and a second dielectric substrate 1010b. The antenna module 1100 may be formed by a transparent electrode portion and implemented as a transparent antenna module. The antenna module 1100 may be implemented by more than one antenna element. The antenna module 1100 may include a MIMO antenna and / or other antenna elements for wireless communication. Other antenna elements may include at least one of GNSS / radio / broadcast / WiFi / satellite communication / UWB (ultra-wideband), RKE (Remote Keyless Entry) antennas for vehicle applications.

[0129] Reference Figure 5a to Figure 5c , the antenna assembly 1000 can be connected to the telematics control unit (TCU) 300 through the connector component 313. The connector component 313 can be electrically connected to the TCU300 by forming a connector 313c at the end of the cable. The signal pattern of the second dielectric substrate 1010b formed on the antenna assembly 1000 can be connected to the TCU300 using the connector component 313 such as a coaxial cable. Through the connector component 313, the antenna module 1100 can be electrically connected to the TCU300. The TCU300 can be configured inside the vehicle, but is not limited to this. The TCU300 can be configured on the dashboard inside the vehicle or the roof area inside the vehicle, but is not limited to this.

[0130] On the other hand, when the transparent antenna assembly of the present specification is attached to the inside or surface of the glass panel 310 , the transparent electrode portion including the antenna pattern and the dummy pattern may be disposed in the transparent region 311 . Conversely, the opaque substrate portion may be disposed in the opaque region 312 .

[0131] On the other hand, the broadband transparent antenna structure that can be configured on the glass of a vehicle of the present specification can be implemented using a single dielectric substrate on the same plane as the CPW feeder. In addition, the broadband transparent antenna structure that can be configured on the glass of a vehicle of the present specification can be implemented with a structure having grounding formed on both sides of the radiator, thereby forming a broadband structure.

[0132] The following describes the antenna components related to the broadband transparent antenna structure of this specification. Figure 6a and Figure 6b The metal mesh structure of this specification is configured on a dielectric substrate. Specifically, Figure 6a The structure in which the antenna module 1100 is configured on the dielectric substrate 1010 is shown. The antenna module 1100 forms a metal mesh radiator region 1020a. Thus, the dielectric substrate 1010 can be composed of the metal mesh radiator region 1020a and the surrounding non-metal region 1020b0. The metal mesh radiator region 1020a and the non-metal region 1020b0 can be distinguished by the eye through the difference in reflectivity Ra of the metal mesh radiator region 1020a and the reflectivity Rb0 of the non-metal region 1020b0. It is necessary to improve the non-visibility of the transparent antenna so that the metal mesh radiator region 1020a and the non-metal region 1020b0 cannot be distinguished.

[0133] Figure 6b 1 shows a structure in which the antenna module 1100 and the dummy pattern are arranged on the dielectric substrate 1010. Figure 6b (a), the antenna module 1100 forms a metal mesh radiator region 1020a, and the dummy pattern forms a dummy metal mesh region 1020b. The metal mesh radiator region 1020a can be formed in a structure in which metal wires are connected to each other. The difference between the reflectivity Ra of the metal mesh radiator region 1020a and the reflectivity Rb of the dummy metal mesh region 1020b can be a value below a critical value. As a result, the metal mesh radiator region 1020a and the dummy metal mesh region 1020b cannot be distinguished by the eyes.

[0134] Reference Figure 6b (a) and Figure 6b(b), the dummy metal mesh area 1020b can be formed in a structure in which the metal wires are disconnected, that is, an open dummy structure 1020b-R1. In the open dummy structure 1020b-R1, an open area (OA) can be formed in each grid or a predetermined unit of grid. Figure 6b (a) and Figure 6b (c), the dummy metal mesh region 1020b may be formed in a structure in which metal lines are connected to each other, ie, a closed dummy structure 1020b-R2.

[0135] Compared with the closed dummy structure 1020b-R2, the surface resistance in the open dummy structure 1020b-R1 increases, which may degrade the antenna performance. Compared with the open dummy structure 1020b-R1, the surface resistance in the closed dummy structure 1020b-R2 decreases, which can improve the antenna performance. The transmittance of the open dummy structure 1020b-R1 can be higher than the transmittance of the closed dummy structure 1020b-R2. In this regard, the ratio of the open area OA of the open dummy structure 1020b-R1 can be kept within a critical value. Thus, the difference in the transmittance of the closed dummy structure 1020b-R2 and the transmittance of the open dummy structure 1020b-R1 can be kept within a specified level. In addition, the degradation of the antenna performance caused by the increase in surface resistance of the open dummy structure 1020b-R1 is minimized.

[0136] Figure 7a Showing the front view and cross-sectional view of the transparent antenna assembly of the present specification. Figure 7b It is a diagram showing the mesh structure of the metal mesh radiator area and the virtual metal mesh area according to the embodiment.

[0137] Figure 7a (a) shows a front view of the antenna assembly 1000 having a transparent antenna structure. Figure 7a (a), the antenna assembly 1000 may include a first transparent dielectric substrate 1010a and a second dielectric substrate 1010b. The first transparent dielectric substrate 1010a may be referred to as a transparent substrate 1010a, and the second dielectric substrate 1010b may be referred to as an opaque substrate 1010b.

[0138] A conductive pattern 1110 that acts as a radiator may be disposed on one side of the transparent substrate 1010a. A feed pattern 1120f and ground patterns 1121g and 1122g may be formed on one side of the opaque substrate 1010b. The conductive pattern 1110 that acts as a radiator may include more than one conductive pattern. The conductive pattern 1110 may include a first pattern 1111 connected to the feed pattern 1120f and a second pattern 1112 connected to the ground pattern 1121g. The conductive pattern 1110 may further include a third pattern 1113 connected to the ground pattern 1122g. The conductive pattern 1110 that acts as a radiator may also be referred to as a radiation conductive portion 1110.

[0139] Figure 7a (b) is a cross-sectional view of the antenna assembly 1000, showing the layered structure of the antenna assembly 1000. Figure 7a (b), the antenna module 1100 may be disposed in the transparent region 311 of the glass panel 310. The first region R1 of the antenna module 1100 may be disposed in the transparent region 311. The second region R2 of the antenna module 1100 may be disposed in the opaque region 312. The opaque region 312 of the glass panel 310 may be disposed with a feeding structure 1100f.

[0140] The antenna module 1100 may include a transparent substrate 1010a, a first conductive pattern 1110, and an adhesive layer 1041. The feed structure 1100f may include an opaque substrate 1010b and a second conductive pattern 1120. The first conductive pattern 1110 of the antenna module 1100 may be connected to the second conductive pattern 1120 of the feed structure 1100f. The first connection pattern 1110c as an end portion of the first conductive pattern 1110 may be connected to the second connection pattern 1120c as an end portion of the second conductive pattern 1120.

[0141] The conductive pattern 1110 constituting the antenna module 1100 may be implemented as a transparent antenna. Figure 7a and Figure 7b, the conductive pattern 1110 may be formed of a metal grid pattern 1020a below a specific line width and form a metal mesh radiator region. In order to maintain a specified level of transparency, a dummy metal grid pattern 1020b may be formed in the inner region or outer region between the first pattern to the third pattern 1111, 1112, and 11113 of the conductive pattern 1110. The metal grid pattern 1020a and the dummy metal grid pattern 1020b may form a metal mesh layer 1020. Since the metal grid pattern 1020a forms a radiator region, it may be referred to as a metal mesh radiator region 1020a. Since the dummy metal grid pattern 1020b forms a dummy region instead of a radiator region, it may be referred to as a dummy metal mesh region 1020b.

[0142] Figure 7b (a) shows the structure of a typical metal grid pattern 1020a and a dummy metal grid pattern 1020b. Figure 7b (b) shows the structure of an atypical metal grid pattern 1020a and a virtual metal grid pattern 1020b. Figure 7b As shown in (a), the metal mesh layer 1020 can be formed into a transparent antenna structure by a plurality of metal meshes. The metal mesh layer 1020 can be formed in a regular metal mesh shape such as a quadrilateral, a rhombus, or a polygon. The conductive pattern can be formed into a plurality of metal meshes to act as a feeder or a radiator. The metal mesh layer 1020 constitutes a transparent antenna area. As an example, the metal mesh layer 1020 can be implemented with a thickness of about 2 mm, but is not limited thereto.

[0143] The metal mesh layer 1020 may include a metal grid pattern 1020a and a dummy metal grid pattern 1020b. The metal grid pattern 1020a and the dummy metal grid pattern 1020b may form an open area (OA) whose ends are disconnected so as not to be electrically connected. The dummy metal grid pattern 1020b may be formed with slits SL so that the ends of the respective meshes CL1, CL2, ..., CLn are not connected.

[0144] Reference Figure 7b (b), the metal mesh layer 1020 may be formed of a plurality of atypical metal meshes. The metal mesh layer 1020 may include a metal grid pattern 1020a and a dummy metal grid pattern 1020b. The metal grid pattern 1020a and the dummy metal grid pattern 1020b may form an open area OA whose ends are disconnected so as not to be electrically connected. The dummy metal grid pattern 1020b may be formed with slits SL so that the ends of the individual grids CL1, CL2, ..., CLn are not connected.

[0145] on the other hand, Figure 8a The antenna assembly of this specification is composed of an antenna pattern portion and a dummy pattern portion. Figure 8a , the antenna component can be composed of a radiator area, a virtual area and a feeding area. Figure 8b Indicates that Figure 8a An enlarged view of a boundary area between an antenna pattern portion and a dummy pattern portion. Fig. 9 Schematic diagram showing a layered structure of an antenna assembly according to an embodiment.

[0146] Fig. 9 (a) shows an antenna assembly in which a first conductive pattern 1110 is disposed on an upper portion of a transparent substrate 1010a. Fig. 9 (a), the antenna module 1100 may include a protective layer 1030, a transparent substrate 1010a, a first conductive pattern 1110, and an adhesive layer 1041. The feeding structure 1100f may include an opaque substrate 1010b, a second conductive pattern 1120, and an adhesive layer 1042. Fig. 9 (b), the antenna module 1100 may include a transparent substrate 1010a, a first conductive pattern 1110, and an adhesive layer 1041. The feeding structure 1100f may include a second conductive pattern 1120, an opaque substrate 1010b, and an adhesive layer 1042.

[0147] Reference Fig. 9 , the transparent substrate 1010a may have a first surface S1 and a second surface S2. The first surface S1 and the second surface S2 may be arranged on opposite surfaces. The first surface S1 may be formed to face the glass panel 310, and the second surface S2 may be formed to face the inner side of the vehicle. The opaque substrate 1010b may have a third surface S3 and a fourth surface S4. The third surface S3 and the fourth surface S4 may be arranged on opposite surfaces. The third surface S3 may be formed to face the glass panel 310, and the fourth surface S4 may be formed to face the inner side of the vehicle.

[0148] The antenna module 1100 may be disposed in the transparent region 311 of the glass panel 310, and the feeding structure 1100f may be disposed in the opaque region 312 of the glass panel 310. A frit pattern 312f may be formed in the opaque region 312 of the glass panel 310. The first conductive pattern 1110 of the antenna module 1100 may be connected to the second conductive pattern 1120 of the feeding structure 1100f. The first connecting pattern 1110c as the end of the first conductive pattern 1110 may be connected to the second connecting pattern 1120c as the end of the second conductive pattern 1120.

[0149] Reference Fig. 9 (a), a first conductive pattern 1110 may be formed on the second surface S2 as the front side of the transparent substrate 1010a. A second conductive pattern 1120 may be formed on the third surface S3 as the back side of the opaque substrate 1010b. Fig. 9 (b), a first conductive pattern 1110 may be formed on the first surface S1 which is the back surface of the opaque substrate 1010b. A second conductive pattern 1120 may be formed on the fourth surface S4 which is the front surface of the opaque substrate 1010b.

[0150] Reference Figures 8a to 9 , the antenna assembly 1000 may include a transparent substrate 1010a and an opaque substrate 1010b. In order to maintain the required visibility in the corner area outside the antenna area of ​​the transparent substrate 1010a, the metal mesh structure may be fully coated to form a metal mesh structure in the entire area of ​​the transparent substrate 1010a. Figure 8a and Figure 8b The size of the transparent substrate 1010a may be larger than that of the radiation conductor portion 1110 by a predetermined ratio or more.

[0151] The radiation conductor portion 1110 may include an antenna pattern 1111, a feeding pattern 1110f, and a ground pattern 1120g. The feeding pattern 1110f may be formed with a specified width and length to be connected to the antenna pattern 1111 and to feed a signal to the antenna pattern 1111. The ground pattern 1120g may be configured to be separated from the feeding pattern 1110f on both sides of the feeding pattern 1110f. A conductive pattern filled with metal may be formed on the opaque substrate 1010b. A connector portion (CP: connector portion) that transmits a signal to the feeding pattern 1110f may be formed on the opaque substrate 1010b. A ground portion (GP: ground portion) separated from the boundary of the connector portion CP may be formed on both sides of the connector portion CP. The feeding pattern 1110f and the ground pattern 1120g formed on the transparent substrate 1010a may form a CPW feeding structure. In addition, the connector portion CP and the ground portion GP formed on the opaque substrate 1010b may also form a CPW feeding structure.

[0152] Reference Figures 8a to 9, the antenna assembly 1000 of the present specification is described. The antenna assembly 1000 may include a transparent dielectric substrate 1010a and a radiating conductor portion 1110. The radiating conductor portion 1110 is composed of a plurality of conductive patterns and constitutes an antenna element. Therefore, the radiating conductor portion 1110 may also be referred to as a conductive pattern, an antenna element, an antenna pattern, or a radiating pattern. The radiating conductor portion 1110 may be formed in a metal mesh shape on one side of the transparent substrate 1010a to radiate a wireless signal.

[0153] The antenna module 1100 of the antenna assembly 1000 may include a first layer L1 and a second layer L2. The first layer L1 may be implemented as a dielectric substrate formed of a transparent dielectric material. The second layer L2 may be formed in a metal mesh shape on one side of the dielectric substrate. Fig. 9 , the first layer L1 may be referred to as a dielectric substrate 1010, and the second layer L2 may be referred to as a metal mesh layer 1020. Alternatively, the first layer L1 may be referred to as a dielectric region 1010, and the second layer L2 may be referred to as a metal mesh layer 1020. In this regard, the combination of the dielectric region 1010 and the metal mesh layer 1020 may be referred to as a dielectric substrate 1050.

[0154] The second layer L2 may include a metal mesh radiator region 1020a and a dummy metal mesh region 1020b. The metal mesh radiator region 1020a may be referred to as a metal mesh (or radiator region, antenna pattern) 1020a, and the dummy metal mesh region 1020b may be referred to as a dummy mesh (or dummy region, dummy pattern) 1020b.

[0155] The metal mesh radiator region 1020a may be composed of metal lines and open areas OA (open areas) that implement an irregular (atypical) grid shape below a specified line width to transmit and receive wireless signals. The metal line width of the metal mesh radiator region 1020a may be implemented to be less than 10um, and the open area OA may be implemented only in the boundary area of ​​the metal mesh radiator region 1020a. The virtual metal mesh region 1020b may be composed of metal lines and open areas OA that implement an irregular grid shape below a specified line width. The metal line width of the virtual metal mesh region 1020b may be implemented to be less than 10um, and the open area OA may be implemented only in the boundary area and internal area of ​​the virtual metal mesh region 1020b.

[0156] The metal mesh radiator region 1020a may be formed with a first transmittance. The virtual metal mesh region 1020b may be formed with a second transmittance higher than the first transmittance. An open area OA may be formed in a boundary area of ​​the virtual metal mesh region 1020b. A slit SL may be formed in an inner area of ​​the virtual metal mesh region 1020b, so that it may be formed with a lower transmittance than the metal mesh radiator region 1020a.

[0157] As an example, the first transmittance of the metal mesh radiator region 1020a may be set to be greater than 80%. The second transmittance of the virtual metal mesh region 1020b may be set to be greater than 82%. As a column, the first transmittance of the metal mesh radiator region 1020a may be set to be greater than 70%. The second transmittance of the virtual metal mesh region 1020b may be set to be greater than 72%. The first line width of the metal mesh radiator region 1020a may also be thicker than the second line width of the virtual metal mesh region 1020b, thereby making the transmittance of the virtual metal mesh region 1020b relatively low.

[0158] The sheet resistance of the metal mesh radiator region 1020a may be formed to be less than 1Ω(ohm) / sq. The difference in transmittance between the first transmittance of the metal mesh radiator region 1020a and the second transmittance of the dummy metal mesh region 1020b may be less than 2%.

[0159] The virtual metal mesh region 1020b may be configured to be separated from the outer contour region of the metal mesh radiator region 1020a by a gap. A portion of the boundary of the virtual metal mesh region 1020b and the boundary of the metal mesh radiator region 1020a may be separated by the gap. The virtual metal mesh region 1020b may be configured to be separated from the outer contour region of the metal mesh radiator region 1020a by a predetermined gap G1 in the form of a gap. The gap separating the virtual metal mesh region 1020b and the metal mesh radiator region 1020a may also be formed at different intervals in the radiator region and the feeding region.

[0160] The irregular mesh shape of the virtual metal mesh region 1020b overlapping with the virtual cut lines formed along the two-axis direction can form the slit SL. The virtual cut lines and the polygon formed by the metal lines of the irregular mesh shape can be formed so as to overlap in the linewidth region equivalent to the inside of the polygon. The virtual cut lines can be formed at equal intervals HG1 and VG1 in the virtual metal mesh region 1020b.

[0161] The metal mesh lines of the metal mesh radiator region 1020a and the virtual metal mesh region 1020b may form an irregular pattern. On the contrary, the virtual disconnection lines may form a regular pattern. In this regard, the virtual disconnection lines may be formed by a regular pattern mask.

[0162] In one axial direction, the intervals of the virtual break lines may be formed at equal intervals HG1 in the virtual metal mesh region 1020b. In another axial direction perpendicular to the one axial direction, the intervals of the virtual break lines may be formed at equal intervals VG1 in the virtual metal mesh region 1020b. As an example, the first interval HG1 of the virtual break lines in one axial direction and the second interval VG1 of the virtual break lines in another axial direction may be the same. As another example, the first interval HG1 of the virtual break lines in one axial direction and the second interval VG1 of the virtual break lines in another axial direction may be different.

[0163] The wider the interval G1 of the virtual metal mesh area 1020b, the more distinguishable the antenna pattern and the virtual pattern. The interval G1 of the virtual metal mesh area 1020b can be formed to be less than 100um. The interval G1 of the virtual metal mesh area 1020b can be formed to be less than the intervals HG1 and VG1 of the virtual disconnection lines, thereby preventing the difference in visibility from the metal mesh radiator area 1020a.

[0164] In short, the virtual pattern of the virtual metal mesh region 1020b can be configured to be disconnected in the longitudinal and transverse directions. The coupling between the antenna pattern implemented by the metal mesh radiator region 1020a and the virtual pattern 1020b configured to be disconnected in the longitudinal and transverse directions can be reduced compared to the second coupling between the antenna pattern and the virtual patterns connected to each other. Here, the virtual patterns connected to each other refer to being configured to be connected to each other in a grid like the antenna pattern.

[0165] The boundary of the dummy pattern 1020b may be configured to be disconnected from the boundary of the metal wire of the metal mesh radiator region 1020a by a predetermined interval G1, for example, an interval of 100um or less than 200um. The dummy pattern 1020b may be formed by disconnecting from the boundary region of the metal mesh radiator region 1020a formed as the antenna pattern 1111 of FIG. 7 by a predetermined interval G1. In this regard, the predetermined interval G1 may be set to an interval of less than 200um. The critical value of the predetermined interval G1 may be set to an interval of less than 100um.

[0166] The first interval HG1 and the second interval VG1 of the virtual break lines in the vertical direction and the horizontal direction may be set to be greater than the specified interval G1. In this regard, in the virtual metal mesh area 1020b, the vertical virtual break lines may be arranged along the horizontal direction with the second interval VG1, and the horizontal virtual break lines may be arranged along the vertical direction with the first interval HG1. The first interval HG1 and the second interval VG1 may be set to be greater than the interval G1 between the boundary of the virtual metal mesh area 1020b and the boundary of the metal mesh radiator area 1020a.

[0167] Refer to Figures 7 to Fig. 9 , the virtual pattern of the virtual metal mesh area 1020b can be divided into two areas, namely, a first area 1020b-R1 and a second area 1020b-R2, and the boundary thereof can be determined by the electrical distance from the radiation conductor portion 1110. The virtual metal mesh area 1020b can be composed of a mesh (first area 1020b-R1) disconnected by a virtual disconnection line and a mesh (second area 1020b-R2) not disconnected by the disconnection line. The interval G2 of the first area 1020b-R1 can be implemented at a predetermined interval or more. As an example, the interval G2 of the first area 1020b-R1 can be determined to be greater than 0.5 wavelength of the upper limit frequency in the operating frequency band, but is not limited thereto.

[0168] The virtual metal mesh region 1020b may include a first region 1020b-R1 adjacent to the metal mesh radiator region 1020a at a distance less than a specified interval and a second region 1020b-R2 separated by a distance greater than a specified interval. The first region 1020b-R1 of the virtual metal mesh region separated by less than a specified interval from the boundary of the metal mesh radiator region 1020a may form an open dummy region having open regions disconnected by an irregular grid shape. On the contrary, the second region 1020b-R2 of the virtual metal mesh region separated by more than a specified interval from the boundary of the metal mesh radiator region 1020a may form a closed dummy region connected to each other in an irregular grid shape.

[0169] In this regard, the irregular mesh shape in the open virtual region overlapping with the virtual disconnection line formed along the two-axis direction may form the slit SL. In contrast, the irregular mesh shape in the closed virtual region may be formed as a structure in which no open region is formed inside, similar to the metal mesh radiator region 1020a. The prescribed interval for determining the open virtual region and the closed virtual region may be set to 1 / 4 to 1 / 2 of the wavelength corresponding to the upper limit frequency of the operating frequency of the antenna pattern implemented by the metal mesh radiator region 1020a.

[0170] In short, the size of the dielectric substrate 1010 as the antenna substrate is 0.5λ from the outline of the radiation conductor portion 1110. H In the following case, the area outside the radiation conductor portion 1110 may be formed by the dummy area 1020b. The size of the dielectric substrate 1010 is 0.5λ from the outline of the radiation conductor portion 1110. H In the above case, from the radiation conductor 1110 to the minimum 0.5λ H The distance should be the open virtual region 1020b-R1. Since the outermost contour of the radiation conductor portion 1110 is separated by 0.5λ H The above areas do not meet the conditions for an open virtual area, so it does not matter if they are closed virtual areas 1020b-R2.

[0171] The virtual break line can be formed as a gradient pattern with a specified interval or a gradient pattern with a monotonically increasing or monotonically decreasing interval. The virtual break line can be formed so that there is a difference in the configuration interval of the break line in at least one direction such as the longitudinal direction or the lateral direction along the direction away from the radiation conductor part 1110, that is, there is a density difference. As an example, the radiation conductor part 1110 can be arranged adjacent to the outer contour area of ​​the vehicle glass. Compared with the outer contour area of ​​the vehicle glass, the central area may require higher transparency. Therefore, higher transparency is required in the direction away from the radiation conductor part 1110, that is, in the central area of ​​the vehicle glass. Therefore, the break line can be formed so that the configuration interval increases in the direction away from the radiation conductor part 1110.

[0172] In this regard, the first interval HG1 and the second interval VG1 of the break lines in the low density portion may be used as a reference for the break line interval. In other words, the first interval HG1 and the second interval VG1 of the break lines in the low density portion may be formed to be less than 1 / 10 of the wavelength of the upper limit frequency.

[0173] The following describes in detail the size of the dummy pattern, the spacing between open points in the open area of ​​the dummy pattern, and the surface resistance of the irregular pattern. Fig.10 The structure in which a metal mesh radiator region and a dummy metal mesh region are formed in a layered structure on an upper portion of a dielectric substrate formed with a transparent material substrate and metal lines are formed in a double-sided blackened structure. Fig.11 Indicates the transmittance and sheet resistance according to the line width, line height and pitch of various types of metal mesh structures.

[0174] Reference Figure 7b to Figure 10A metal mesh layer 1020 may be formed on the second layer L2 as the upper layer of the first layer L1, i.e., the dielectric substrate 1010. A metal mesh radiator region 1020a and a virtual metal mesh region 1020b may be formed on the metal mesh layer 1020. The virtual metal mesh region 1020b may be formed to be separated from both side boundaries of the metal mesh radiator region 1020a by a predetermined interval G1. The metal mesh radiator region 1020a may be referred to as a metal mesh (grid) (or radiator region, antenna pattern) 1020a, and the virtual metal mesh region 1020b may be referred to as a virtual mesh (grid) (or virtual region, virtual pattern) 1020b.

[0175] Reference Fig.10 (b), the dielectric substrate 1010 may include: a first dielectric substrate 1010-1; and a second dielectric substrate 1010-2, which is arranged on the upper part of the first dielectric substrate 1010-1. The first dielectric substrate 1010-1 can be implemented by a film material such as a PET film, but is not limited thereto. The second dielectric substrate 1010-2 can be implemented by an adhesive dielectric material such as a UV resin, but is not limited thereto. A metal mesh layer 1020 may be formed in the empty space of the second dielectric substrate 1010-2. The metal mesh layer 1020 may include: a metal layer 1020-1; and a first blackening layer 1020-2 and a second blackening layer 1020-3, which are arranged on the upper part and the lower part of the metal layer 1020-1.

[0176] As an example, the thickness of the first dielectric substrate 1010-1 may be about 75um, and the thickness of the second dielectric substrate 1010-2 may be about 15um, but is not limited thereto. The thickness of the metal layer 1020-1 may be about 6.0um, and the first black layer 1020-2 and the second black layer 1020-3 may be about 1.5um, respectively, but are not limited thereto. The thickness of the metal layer 1020-1 may be about 6.0 to 6.3um. The line width of the metal layer 1020-1 may be about 5.2 to 5.4um. The filling rate of the metal mesh layer 1020 may be about 80 to 85%.

[0177] Reference Fig.11, compared with the regular grid type of diamond, the irregular grid type can realize the line width of 5.2 to 5.4um, thereby realizing a wider line width. Thus, compared with the regular grid type that realizes a smaller pitch value of 70um, the irregular grid type can realize a larger pitch value of 100 to 150um. Thus, the transmittance of the irregular grid type is about 82 to 86%, which has a higher transmittance than the transmittance of about 70% of the regular grid type. In addition, the irregular grid type has a sheet resistance of 0.47 to 0.89Ω / sq. In addition, unlike the regular grid type, the irregular grid type can change the pitch according to a specific area like an antenna area or a grid area, so it has the advantage of being able to consider electrical performance and visibility to achieve the optimal metal mesh design. According to the characteristics of various structures of this irregular grid type, it will be described in detail later.

[0178] On the other hand, in the transparent antenna structure of the present specification, the transmittance of the metal mesh can be determined according to the length and width of the metal wire and the area ratio of the disconnected portion. Fig.12 A metal mesh structure having a specified length, line width, and disconnected portions where metal lines are disconnected.

[0179] Reference Fig.12 , the unit cell of the metal mesh can be implemented with a specified line width W and pitch P. The area where the metal line is not formed can be called a transparent area (TA). The metal line of the metal mesh radiator area 1020a forms a radiation conductive portion. The unit cell formed by the metal line of the metal mesh radiator area 1020a can be a mesh structure with a specified length L and line width W. The specified length L of the unit cell corresponds to the mesh pitch P.

[0180] The metal lines of the dummy metal mesh region 1020b form a dummy pattern portion. The unit cell formed by the metal lines of the dummy metal mesh region 1020b may be formed with disconnected portions 1020b-C1 and 1020b-C2 in a mesh structure having a specified length L and a line width W. The width of the disconnected portion 1020b-C1 may be formed with a first width HW, and the width of the disconnected portion 1020b-C2 may be formed with a second width VW.

[0181] If the area of ​​the unit cell is set to A and the area of ​​the transmission region TA where the metal wire is not formed is set to A', the transmittance is determined according to the opening ratio. Therefore, the transmittance can be determined by A' / A. When the transmittance is calculated by the unit grid structure, the transmittance of the radiation conductor portion 1020a can be calculated as (LW)2 / L 2 On the contrary, the transmittance of the dummy pattern portion 1020b can be calculated as ((LW) 2 +2×L×W1) / L 2 Therefore, the transmittance of the dummy metal mesh area 1020b corresponding to the dummy pattern portion increases by 2×L×W1 / L, which is the ratio of the areas of the disconnected portions 1020b-C1 and 1020b-C2. 2 Therefore, when the radiation conductor part and the dummy pattern part are implemented with the same grid, the transmittance of the dummy pattern part with a wider aperture ratio increases. Fig.12 The transmittance is calculated in a similar manner to the regular grid structure of FIG. In the irregular grid structure, the transmittance can be determined as A′ / A, which is the area A′ of the transmission region TA divided by the area A of the unit cell.

[0182] Reference Figures 10 to 12 The line width of the irregular dummy pattern of the dummy metal mesh region 1020 b may be 5.2 um to 5.4 um, and the thickness of the irregular dummy pattern of the dummy metal mesh region 1020 b may be 6.0 um to 6.3 um.

[0183] The regular mesh type metal mesh layer TM may be formed in a diamond structure, and the line width may be about 4.2 to 4.5 um. The line height of the regular mesh type metal mesh layer TM may be about 0.5 to 0.65 um. On the other hand, the line width of the irregular mesh type metal mesh layers ATM1 to ATM6 may be 5.2 um to 5.4 um. The line height of the irregular mesh type metal mesh layers ATM1 to ATM6 may be about 6.0 um to 6.3 um. In this regard, as Fig.10 As shown in (a), the irregular virtual pattern of the virtual metal mesh area 1020b may include: a metal layer 1020-1; and a first black layer 1020-2 and a second black layer 1020-3, which are arranged at the upper part and the lower part of the metal layer 1020-1. Thus, the line height (thickness) of the irregular mesh type metal mesh layers ATM1 to ATM6 can be thicker than the line height (thickness) of the regular mesh type metal mesh layer TM.

[0184] The pitch of the regular mesh type metal mesh layer TM may be about 70 um. On the other hand, the pitch of the irregular mesh type metal mesh layers ATM1 to ATM6 may be about 100 to 150 um.

[0185] As an example, the transmittance of the metal mesh layer TM of the regular grid type can be 79.79%. The transmittance of the metal mesh layers ATM1 to ATM6 of the irregular grid type can be 82.62 to 86.29%. In the metal mesh layers ATM1 to ATM6 of the irregular grid type, the transmittance increases as the pitch equivalent to the grid spacing increases. In the metal mesh layers ATM1 to ATM6 of the irregular grid type, the sheet resistance value also increases as the pitch increases. As an example, increase. The sheet resistance of the metal mesh layers ATM1 to ATM6 of the irregular grid type has a value of about 0.47 to 0.88Ω / sq. In the case where the pitch of the metal wires of the irregular grid shape is in the range of 100 to 150um, the sheet resistance of the irregular grid shape can be formed in the range of 0.47 to 0.89Ω / sq. In the metal mesh layers ATM1 to ATM6 of the irregular grid type, the haze value caused by reflection decreases as the pitch increases.

[0186] Reference Figures 10 to 12 The antenna pattern 1111 implemented by the metal mesh radiator region 1020a can be formed to operate in an operating frequency band of 800 MHz to 3000 MHz. In addition, considering the entire 4G / 5G frequency band, the antenna pattern 1111 can also be formed to operate in an operating frequency band of 600 MHz to 6 GHz.

[0187] Reference Figures 9 to 12 , the intervals HG1 and VG1 of the virtual break lines of the virtual metal mesh area 1020a can be set to be less than 1 / 10 of the wavelength. Taking into account the reference frequency of the working frequency band of the antenna pattern 1111, such as the wavelength corresponding to the uppermost frequency, the intervals of the virtual break lines can be set to be less than 10 mm. In this regard, the working frequency of the antenna pattern 1111 is 800 MHz to 3000 MHz, the reference frequency is 3000 MHz, and the wavelength is equivalent to 10 cm. Thus, the intervals HG1 and VG1 of the virtual break lines of the virtual metal mesh area 1020a can be set to be less than 10 mm, which is 1 / 10 of the wavelength. In the case where the antenna pattern 1111 operates in the working frequency band of 600 MHz to 6 GHz, the reference frequency is 6 GHz, and the wavelength is equivalent to 5 cm. Thus, the intervals HG1 and VG1 of the virtual break lines of the virtual metal mesh area 1020a can be set to be less than 5 mm, which is 1 / 10 of the wavelength.

[0188] The transparent antenna structure of one aspect of the present specification is described above. The transparent antenna structure of the CPW feeding method of another aspect of the present specification is described below. In this regard, all the structural features and technical features of the transparent antenna structure described above can be applied to the transparent antenna structure of the CPW feeding method below.

[0189] Reference Figures 7a to 9 The antenna assembly may include a first layer L1, which is implemented as a dielectric substrate 1010 formed of a transparent dielectric material. The antenna assembly may include a second layer L2, which is formed in a metal mesh shape on one side of the dielectric substrate 1010. Fig. 9 , the first layer L1 may be referred to as a dielectric substrate 1010, and the second layer L2 may be referred to as a metal mesh layer 1020. Alternatively, the first layer L1 may be referred to as a dielectric region 1010, and the second layer L2 may be referred to as a metal mesh layer 1020. In this regard, the combination of the dielectric region 1010 and the metal mesh layer 1020 may also be referred to as a dielectric substrate 1050.

[0190] The second layer L2 may include a metal mesh radiator region 1020a, which is composed of metal wires and open areas OA that implement an irregular (atypical) grid shape below a specified line width to transmit and receive wireless signals. The line width of the metal wire that implements the metal mesh shape may be less than 10um. The second layer L2 may include a virtual metal mesh region 1020b, which is composed of metal wires and slits SL that implement an irregular grid shape below a specified line width. The line width of the metal wire that implements the virtual metal mesh shape may also be less than 10um. The second layer L2 may include a connector portion CP, which is connected to the metal mesh radiator region 1020a and transmits signals. A ground portion GP may be formed on both sides of the connector portion CP.

[0191] The metal mesh radiator region 1020a may be referred to as a metal mesh (or radiator region, antenna pattern) 1020a, and the virtual metal mesh region 1020b may be referred to as a virtual mesh (or virtual region, virtual pattern) 1020b.

[0192] The metal mesh radiator region 1020a and the dummy metal mesh region 1020b may form a first region 1100-R1, and the connector part CP may form a second region 1100-R2.

[0193] The metal mesh radiator region 1020a may be formed with a first transmittance. The dummy metal mesh region 1020b may be formed with a second transmittance higher than the first transmittance. The connector portion CP may be formed with a third transmittance lower than the first transmittance.

[0194] As an example, the first transmittance of the metal mesh radiator region 1020a can be set to be greater than 80%. The second transmittance of the virtual metal mesh region 1020b can be set to be greater than 82%. The third transmittance of the connector portion CP can be set to be less than 70%. As a different example, the first transmittance of the metal mesh radiator region 1020a can be set to be greater than 70%. The second transmittance of the virtual metal mesh region 1020b can be set to be greater than 72%. The transmittance of the virtual metal mesh region 1020b can also be made relatively low by making the first line width of the metal mesh radiator region 1020a thicker than the second line width of the virtual metal mesh region 1020b.

[0195] The sheet resistance of the metal mesh radiator region 1020a can be formed to be less than 1Ω (ohm) / sq. The difference in transmittance between the first transmittance of the metal mesh radiator region 1020a and the second transmittance of the virtual metal mesh region 1020b can be less than 2%, thereby maintaining visibility below a specified level. The virtual metal mesh region 1020b can be configured to be separated from the outer contour region of the metal mesh radiator region 1020a by a gap. A portion of the boundary of the virtual metal mesh region 1020b and the boundary of the metal mesh radiator region 1020a can be separated by a gap. The virtual metal mesh region 1020b can be configured to be separated from the outer contour region of the metal mesh radiator region 1020a by a gap equivalent to the specified interval G1. The separation interval of the gap between the virtual metal mesh region 1020b and the metal mesh radiator region 1020a can also be formed at different intervals from each other in the radiator region and the feeding region.

[0196] The irregular mesh shape of the virtual metal mesh region 1020b overlapping with the virtual cut lines formed along the two-axis direction can form the slit SL. The virtual cut lines and the polygon formed by the metal lines of the irregular mesh shape can be formed so as to overlap in the linewidth region equivalent to the inside of the polygon. The virtual cut lines can be formed at equal intervals HG1 and VG1 in the virtual metal mesh region 1020b.

[0197] Reference Figures 10 to 12 The line width of the irregular dummy pattern of the dummy metal mesh region 1020 b may be 5.2 um to 5.4 um, and the thickness of the irregular dummy pattern of the dummy metal mesh region 1020 b may be 6.0 um to 6.3 um.

[0198] Reference Figures 7a to 12, the antenna pattern 1111 implemented by the metal mesh radiator area 1020a can be formed to operate in an operating frequency band of 800MHz to 3000MHz. The intervals HG1 and VG1 of the virtual break lines of the virtual metal mesh area 1020a can be set to less than 1 / 10 of the wavelength. 3000MHz of the frequency band of the antenna pattern 1111 can be used as the reference frequency, and the intervals of the virtual break lines can be set to less than 10mm. When the pitch of the irregular grid-shaped metal wire is in the range of 100 to 150um, the irregular grid-shaped sheet resistance can be formed in the range of 0.47 to 0.89Ω / sq.

[0199] The dummy pattern of the dummy metal mesh region 1020b may be configured to be disconnected in the longitudinal and transverse directions. The coupling between the antenna pattern implemented by the metal mesh radiator region 1020a and the dummy pattern 1020b configured to be disconnected in the longitudinal and transverse directions may be reduced compared to the second coupling between the antenna pattern and the dummy patterns connected to each other. Here, the dummy patterns connected to each other refer to being configured to be connected to each other in a grid like the antenna pattern.

[0200] The boundary of the dummy pattern 1020b may be configured to be disconnected from the boundary of the metal wire of the metal mesh radiator region 1020a at a predetermined interval G1, for example, an interval of 100um or less than 200um. In the dummy metal mesh region 1020b, the vertical dummy disconnection line may be arranged along the horizontal direction at a second interval VG1, and the horizontal dummy disconnection line may be arranged along the vertical direction at a first interval HG1. The first interval HG1 and the second interval VG1 may be set to be greater than the interval G1 between the boundary of the dummy metal mesh region 1020b and the boundary of the metal mesh radiator region 1020a.

[0201] The first region 1020b-R1 of the virtual metal mesh region that is spaced less than a specified interval from the boundary of the metal mesh radiator region 1020a may form an open dummy region having an open region disconnected by an irregular grid shape. On the contrary, the second region 1020b-R2 of the virtual metal mesh region that is spaced more than a specified interval from the boundary of the metal mesh radiator region 1020a may form a closed dummy region that is connected to each other in an irregular grid shape.

[0202] In this regard, the irregular mesh shape in the open virtual region overlapping with the virtual disconnection line formed along the two-axis direction may form the slit SL. On the contrary, the irregular mesh shape in the closed virtual region may be formed into a structure in which no open region is formed inside, similar to the metal mesh radiator region 1020a. The prescribed interval for determining the open virtual region and the closed virtual region may be set to 1 / 4 to 1 / 2 of the wavelength corresponding to the upper limit frequency of the operating frequency of the antenna pattern implemented by the metal mesh radiator region 1020a.

[0203] On the other hand, regarding the transparent antenna structure of this specification, the virtual disconnection line structure of various embodiments is described. Fig.13a and Fig.13b Indicates a virtual break line structure and a structure formed with virtual break lines and virtual patterns.

[0204] Reference Figure 7a Figure 8 Fig.12 , Fig.13a as well as Fig.13b , the current formed in the antenna is mixed with the vertical current and the horizontal current, so the virtual pattern may affect the antenna performance. In order to reduce this effect, the virtual pattern of the virtual metal mesh area 1020b can be configured to be disconnected along the longitudinal / lateral direction. In this way, the coupling effect between the radiation conductor part 1110 and the virtual pattern of the virtual metal mesh area 1020b can be reduced. Adjacent disconnect lines in the horizontal disconnect lines HCL1, HCL2, ..., HCLN can be separated by a first interval HG1. Adjacent disconnect lines in the vertical disconnect lines (VCL1, VCL2, ..., VCLN) can be separated by a second interval VG1.

[0205] The metal mesh formed in the metal mesh radiator area 1020a and the virtual metal mesh area 1020b can be realized with a line width W of less than 10um and a transparency of more than 70%. The line width W of the metal mesh can be realized to about 1um, and the relative manufacturing error and manufacturing cost of the metal mesh can increase as the line width W decreases from 10um to 5um, 4um and 1um. If the line width W of the metal mesh increases, the transmittance can be maintained by increasing the pitch P, but the visibility may decrease. In particular, under high frequency band conditions such as mm Wave band or Sub6 band, the implementation of antenna design may be limited to small size antennas.

[0206] The dummy pattern formed in the dummy metal mesh region 1020b may be separated from the boundary of the radiation conductor portion of the metal mesh radiator region 1020a by a predetermined interval G1 or more. The disconnection width G1 of the boundary region between the radiation conductor portion and the dummy pattern may be set to be 200um or less. In this regard, when the disconnection interval G1 is 200um or more, it can be distinguished by the eye. When the disconnection interval G1 is 200um or more, it may be distinguished by the eye or may not be distinguished by the eye depending on the viewing distance.

[0207] The first interval HG1 and the second interval VG1 as the intervals between the disconnection lines may be λ H / 10 or less. In this regard, λ H It is the wavelength corresponding to the upper limit frequency in the operating frequency. As mentioned above, when the operating frequency of the antenna is 800 to 3000 MHz, the upper limit frequency as the reference frequency is 3000 MHz, and the wavelength is determined to be 10 cm. Thus, the upper limit values ​​of the first interval HG1 and the second interval VG1 as the intervals between the virtual break lines can be set to 10 mm.

[0208] Regarding the transparent antenna structure of the present specification, the transmittance based on the opening ratio of the metal mesh according to the line width HW and VW of the disconnected portion can be set to a difference within 2% between the virtual pattern portion and the radiation conductor portion. In the case where the radiation conductor portion and the virtual pattern portion are composed of a metal mesh with the same line width, when the line width of the disconnected line increases, the transmittance of the virtual pattern portion increases, thereby allowing the pattern to be recognized by the eyes. Therefore, the line width HW and VW of the disconnected line can be set to less than the critical line width so that the transmittance difference is within 2%.

[0209] The horizontal metal lines HML1, HML2, ..., HMLN can be formed similarly to the horizontal disconnection lines HCL1, HCL2, ..., HCLN. The vertical metal lines VML1, VML2, ..., VMLN can be formed similarly to the vertical disconnection lines VCL1, VCL2, ..., VCLN. On the other hand, in the area RFV without the vertical disconnection lines, the overlap of the disconnection lines and the metal lines VMLN can be avoided. In this regard, the area RFV without the vertical disconnection lines can be the metal mesh radiator area 1020a. In addition, it can be a virtual metal mesh area 1020b separated from the boundary of the metal mesh radiator area 1020a by a predetermined interval or more.

[0210] As mentioned above, the virtual disconnection line structure of various embodiments in the transparent antenna structure of this specification is described in detail with reference to the accompanying drawings. Fig.14 FIG. 2 shows various variations of virtual disconnection line shapes according to the embodiment. Figures 15a to 15cIt shows a structure in which a virtual break line is rotated, moved in parallel, and scaled according to an embodiment.

[0211] Fig.14 (a) shows transverse breaking lines and longitudinal breaking lines formed in a rectangular structure. Adjacent transverse breaking lines may be spaced apart by a second interval VG1, and adjacent longitudinal breaking lines may be spaced apart by a first interval HG1.

[0212] Fig.14 (b) represents break lines in multiple directions formed by a polygonal structure. As an example, it represents break lines from the first direction to the third direction formed by a hexagonal structure. In the first direction, adjacent break lines can be configured to be separated by a first interval DG1. In the second direction, adjacent break lines can be configured to be separated by a second interval DG2. In the third direction, adjacent break lines can be configured to be separated by a third interval DG3. In the break lines formed by a regular hexagonal structure, the first interval to the third interval DG1, DG2, and DG3 can be set to the same interval, but are not limited to this, and can also be set at different intervals from each other.

[0213] Fig.14 (c) shows a break line formed by a rectangular structure and arranged offset in one direction. Fig.14 As shown in (c), the longitudinal break lines can be offset. As another example, the transverse break lines can be offset. In this regard, adjacent transverse break lines can be separated by a second interval VG1, and adjacent longitudinal break lines can be separated by a first interval HG1.

[0214] Reference Fig.14 (a) to Fig.14 (c), the virtual break lines may be formed in geometric shapes. In the case where the virtual break lines are formed in regular geometric shapes, the metal mesh pattern may also be formed in an irregular metal mesh structure.

[0215] Reference Fig.15a , can be constructed as Fig.14 The virtual breaking line structure of (a) is a shape rotated from a one-axis direction by a specified angle. The axis rotated from the one-axis direction by a specified angle can be defined as the first axis direction, and the axis perpendicular to the first axis direction can be defined as the second axis direction. Adjacent breaking lines in the first axis direction can be separated by a first interval HG1. Adjacent breaking lines in the second axis direction can be separated by a second interval VG1.

[0216] Reference Fig.15b, a structure that can be formed into a parallel movement by spacing the grid lines in the horizontal and vertical directions relative to the virtual disconnection lines at a predetermined interval. The metal lines (HML1, HML2, ..., HMLN) in the first direction can be formed by spacing the first interval dx relative to the disconnection lines HCL1, HCL2, ..., HCLN in the first direction. The metal lines VML1, VML2, ..., VMLN in the second direction can be formed by spacing the disconnection lines VCL1, VCL2, ..., VCLN in the second direction at a second interval dy. The virtual pattern can have the same shape as the disconnection line and move dx in the horizontal direction and dy in the vertical direction.

[0217] Reference Fig.15c , the intervals HG1 and VG1 between the disconnection lines may be different from the intervals DW1 and DL1 between the dummy patterns. The disconnection lines may be formed so that the lateral interval HG1 and the longitudinal interval VG1 have the size of the lateral interval DW1 and the longitudinal interval DL1 of the scaled dummy pattern. As an example, the lateral interval HG1 and the longitudinal interval VG1 of the disconnection lines may be scaled to twice the lateral interval DW1 and the longitudinal interval DL1 of the dummy pattern, but are not limited thereto.

[0218] On the other hand, the transparent antenna structure in which the virtual disconnection line is formed in the virtual region of the present specification can be applied not only to antenna elements such as patch antennas but also to antenna elements such as dipole antennas. In this regard, Fig.16a and Fig.16b The transparent antenna structure of the radiation conductor part in the transparent area is shown in the opaque area according to the embodiment of whether or not there is a dummy pattern, and a signal is applied to the radiation conductor part in the transparent area through the feeding part. On the other hand, Fig.17a and Fig.17b Yes Fig.16b An enlarged view of the radiating conductor portion in the transparent antenna structure.

[0219] Reference Fig.16a and Fig.16b , the signal can be transmitted from the opaque substrate 1010b formed as an opaque area to the antenna pattern 1111 of the transparent substrate 1010a formed as a transparent area through the feeding pattern 1110f. The opaque substrate 1010b can be formed of a flexible circuit substrate FPCB, and the transparent substrate 1010a can be formed of a transparent film. A CPW feeding structure is formed by forming a ground pattern 1120g on both sides of the feeding pattern 1110f. The signal can be transmitted to the antenna pattern 1111 through the groove area SR of the opaque substrate 1010b.

[0220] like Fig.16a , it can be configured so that no dummy pattern is formed in the outer contour area of ​​the antenna pattern 1111. However, in order to solve the visibility problem caused by the transparency difference between the antenna pattern 1111 and its outer contour area, as Fig.16bA dummy metal mesh area 1020 b may be formed in the outer contour area of ​​the antenna pattern 1111 .

[0221] Reference Fig.16b and Fig.17a The antenna pattern 1111 may form a metal mesh radiator region 1020a where metal lines are connected to each other. A dummy metal mesh region 1020b may be formed in the outer contour region of the antenna pattern 1111.

[0222] The line width of the metal wire formed in the metal mesh radiator area 1020a and the virtual metal mesh area 1020b may be about 2um and the pitch may be about 100um, but is not limited thereto. The interval between the boundaries of the metal mesh radiator area 1020a and the virtual metal mesh area 1020b may be about 60um, but is not limited thereto. The metal wires of the metal mesh radiator area 1020a and the virtual metal mesh area 1020b may be formed of copper or silver materials, but are not limited thereto. The operating frequency band of the antenna pattern 1111 may be set to a frequency band of about 57 to 70 GHz. In this regard, the transparent antenna structure may be configured to send or receive wireless signals in the 60 GHz WiFi frequency band through the antenna pattern 1111. The antenna pattern 1111 formed in the metal mesh radiator area 1020a may be implemented as a dipole antenna, and as an example, may be implemented as a Yagi dipole antenna, but is not limited thereto.

[0223] Reference Fig.17a , in the virtual pattern of the virtual metal mesh area 1020b formed in the outer contour area of ​​the radiation conductor part 1110, open areas can be formed at specified intervals. In this regard, the adjacent break lines HCL1, HCL2, ..., HCLN in the horizontal direction can be separated and configured with a first interval HG1. The adjacent break lines VCL1, VCL2, ..., VCLN in the vertical direction can be separated and configured with a second interval VG1. The open area can be formed at the intersection of the horizontal break lines HCL1, HCL2, ..., HCLN and the vertical break lines VCL1, VCL2, ..., VCLN with the virtual pattern of the virtual metal mesh area 1020b. As Fig.17a In addition to the boundary area between the metal mesh radiator area 1020a and the virtual metal mesh area 1020b, an open area where metal lines are disconnected at a predetermined interval may also be formed in the virtual metal mesh area 1020b. Thus, the interference between the antenna pattern 1111 and the virtual pattern of the adjacent virtual metal mesh area 1020b can be minimized.

[0224] Reference Fig.17bIn (a), a closed dummy region 1020b-R2 may be formed in the outer contour area of ​​the radiation conductor portion 1110. Alternatively, only the boundary area between the antenna pattern 1111 and the dummy pattern may be disconnected, while the dummy patterns are connected to each other. Fig.17b (a), when the virtual area is formed only by a closed virtual area, although the manufacturing convenience is improved, the antenna efficiency may be reduced due to the coupling phenomenon with the antenna pattern 1111. In order to reduce this coupling phenomenon, Fig.17b (b), the disconnection line may be formed adjacent to a boundary of the antenna pattern 1111.

[0225] Reference Fig.17b (b), the conductive pattern forming the radiation conductor portion 1111 is disconnected from the virtual pattern of the virtual area, and the intersection of the virtual pattern and the virtual disconnection line is disconnected. Specifically, through the horizontal disconnection line HCL1 and the vertical disconnection line VCL1, the virtual grids D1, D2, D3, and D4 formed in the virtual area are disconnected from each other. The interval DG between the virtual grids of the virtual metal mesh area 1020b can be separated by about 100um. The end of the virtual grid D1 adjacent to the boundary of the antenna pattern 1111 can be separated from the boundary of the antenna pattern 1111 by a distance equivalent to the first interval HDG1 and the second interval VDG1. The first interval HDG1 and the second interval VDG1 can be separated by an interval of about 60um, but are not limited thereto. The line width of the metal line forming the metal mesh radiator area 1020a and the virtual metal mesh area 1020b can be about 2um, but are not limited thereto.

[0226] On the other hand, in the transparent antenna structure of the present specification, the antenna performance may be degraded due to the closed virtual area where the virtual patterns around the antenna pattern are connected to each other. Fig.17b In order to improve the invisibility of the transparent antenna, a dummy pattern is required. In this regard, from the perspective of antenna performance, in order to be used as an antenna, the dummy pattern needs to be formed in an open dummy form. Therefore, in the transparent antenna structure of this specification, the presence or absence of the dummy pattern, the interval of the disconnected portion in the dummy pattern, etc. can be considered, and a simulation can be performed on a dummy area formed with a dummy pattern.

[0227] Regarding this, Fig.18a is a graph showing a comparison of the reflection coefficient when only a radiation conductor is arranged without a dummy pattern and when a closed dummy area is formed. Fig.18b 3 is a graph showing a comparison of the reflection coefficients that change according to changes in the intervals between adjacent dummy patterns.

[0228] Reference Fig.16a and Fig.18a , when only the radiating conductor is configured without a dummy pattern, the reflection coefficient characteristic is below -10dB in the entire frequency band. Fig.16b , Fig.17b (a) and Fig.18a In the case where a closed virtual area is formed, the reflection coefficient value is about -5dB in the entire frequency band, so that the antenna performance is degraded. Considering a Wi-Fi communication service operating in the 60GHz frequency band or a mmWave communication service in the 60GHz frequency band, the entire frequency band can be set to a frequency band of about 57 to 70GHz, but is not limited thereto.

[0229] Reference Figures 17a to 18b , as the first interval HG1 of the broken lines adjacent in the horizontal direction and the second interval VG1 of the broken lines adjacent in the longitudinal direction decrease, the interval DG between the virtual grids and the open intervals HDG1 and VDG1 also decrease. Therefore, as the first interval HG1 and the second interval VG1 of the broken lines decrease, the coupling level with the antenna pattern 1111 also decreases. Therefore, as the first interval HG1 and the second interval VG1 of the broken lines decrease, the antenna performance is similar to the antenna performance when there is no virtual pattern. In this regard, if the first interval HG1 and the second interval VG1 of the broken lines are less than about 0.5 mm (0.12 wavelength), the antenna performance converges to the antenna performance when there is no virtual pattern. Therefore, if the first interval HG1 and the second interval VG1 are less than about 0.5 mm (0.12 wavelength), antenna performance similar to that when there is no virtual pattern can be expected.

[0230] On the other hand, in the transparent antenna structure of the present specification, the intervals between the disconnection lines and the intervals between the disconnection lines of the dummy pattern may be formed in the same manner, so that all dummy units are formed with disconnection portions. Fig.19a All virtual cells of the embodiment are formed into a virtual grid structure with disconnected portions. Fig.19b This is a diagram comparing the antenna efficiency of a transparent antenna without a dummy pattern and a transparent antenna with a closed dummy area formed therein. Fig.19c This is a diagram comparing antenna efficiencies according to the intervals at which disconnected portions are formed in a dummy pattern.

[0231] Reference Fig.19aThrough the horizontal disconnection lines HCL1, HCL2, HCL3 and the vertical disconnection lines VCL1, VCL2, VCL3, disconnection areas 1020b-CR can be formed in all virtual grids of the virtual area. The disconnection area 1020b-CR can be in the form of NXN in all virtual grids of the virtual area. The interval DG between the virtual grids of the virtual metal mesh area 1020b can be separated by an interval of about 100um. The first interval HG1 of the horizontal disconnection lines HCL1, HCL2, HCL3 can also be separated by an interval of about 100um. The second interval VG1 of the vertical disconnection lines VCL1, VCL2, VCL3 can also be separated by an interval of about 100um.

[0232] The line width of the disconnected region 1020b-CR forming the virtual metal mesh region 1020b may be formed to be about 2um, but is not limited thereto. In this regard, the line width of the metal line forming the virtual metal mesh region 1020b may be the same as the line width of the disconnected region 1020b-CR. The line width of the metal line forming the virtual metal mesh region 1020b may also be formed to be about 2um, but is not limited thereto.

[0233] Reference Fig.19b , when there is no dummy pattern and only the radiation conductor portion is formed by the antenna pattern, the antenna efficiency value is more than -1dB. On the contrary, when a closed dummy area is formed, the antenna efficiency value is about -3dB. Therefore, compared with the structure without a dummy pattern, when a closed dummy area is formed, unnecessary coupling occurs in the dummy pattern, reducing the antenna efficiency by more than 2dB. It is necessary to solve this problem of reduced antenna efficiency while maintaining the invisibility characteristics between the antenna area and the dummy area.

[0234] Reference Fig.19a and Fig.19c , if the spacing DG between the virtual grids of the virtual metal mesh area 1020b is less than about 0.5 mm (0.12 wavelength), the antenna efficiency can be kept below 0.5 dB. Therefore, when the spacing DG between the virtual grids is formed below the critical value, and the virtual pattern is disconnected at a distance below the specified spacing, it has an antenna performance similar to that of an antenna structure without a virtual pattern. Specifically, if the spacing DG between the virtual grids is less than 0.5 mm (0.12 wavelength), the possibility of using it as an antenna increases. Therefore, if the spacing DG between the virtual grids is formed below the critical value, antenna performance similar to that when there is no virtual pattern can be expected.

[0235] On the other hand, in the transparent antenna structure of the present specification, the current distribution and the magnetic field distribution according to the current distribution are formed differently depending on the presence or absence and type of the dummy pattern, so that the antenna performance changes. In this regard, Figures 20a to 20c1 is a diagram showing a radiating conductor portion and a magnetic field distribution in the surrounding area according to the embodiment. Fig.20a Indicates Fig.16a Magnetic field distribution without dummy patterns. Fig.20b and Fig.20b Yes Fig.16b A structure with a virtual pattern is formed. Specifically, Fig.20b Indicates Fig.17b (a) Magnetic field distribution when a closed virtual pattern is formed. Fig.20c Indicates Fig.19a Magnetic field distribution when an open dummy pattern is formed.

[0236] Reference Fig.16a and Fig.20a , in the absence of a dummy pattern, a strong magnetic field is formed in the radiation conductor and in the area within a predetermined distance therefrom. Fig.17b (a) and Fig.20b , a current is induced in the closed dummy pattern. As a result, a strong magnetic field is formed in the surrounding metal wires adjacent to the radiation conductor and the area within a predetermined distance therefrom. The formation of a strong magnetic field in the adjacent surrounding metal wires means that a strong coupling is also formed in the surrounding metal wires. Fig.19a and Fig.20c , a weaker magnetic field is formed in the open dummy pattern compared to the closed dummy pattern. As a result, the magnetic field distribution of the open dummy pattern structure exhibits similar characteristics to the magnetic field distribution of the structure without the dummy pattern. Therefore, in order to reduce the coupling level between the dummy area and the antenna area, an open dummy pattern is required.

[0237] On the other hand, in the transparent antenna structure of this specification, if Fig.16b , a dummy pattern may be arranged around the antenna pattern 1111. In this regard, Fig.21 Indicated in Fig.16b In the transparent antenna structure, a first dummy pattern and a second dummy pattern are arranged around the antenna pattern. Fig.16b and Fig.21 , a virtual metal mesh region 1020b separated from the boundary of the antenna pattern 1111 may be formed around the antenna pattern 1111. The antenna pattern 1111 may form a metal mesh radiator region 1020a in which metal lines are connected to each other. The virtual metal mesh region 1020b may include a first virtual pattern 1020b-R1 and a second virtual pattern 1020b-R2. The first virtual pattern 1020b-R1 may form an open virtual structure in which the metal lines inside are disconnected. The second virtual pattern 1020b-R2 may form a closed virtual structure in which the metal lines inside are connected to each other.

[0238] Reference Fig.16b , Fig.19a as well as Fig.21 The first dummy pattern 1020b-R1 may be an open dummy pattern in which the intersections of the virtual disconnection lines of the regular quadrilateral shape of which the first interval HG1 and the second interval VG1 are 0.1 mm are opened. Fig.16b , Fig.17b (b) and Fig.21 , the second dummy pattern 1020b-R2 may be a closed dummy area where metal lines inside are connected to each other.

[0239] On the other hand, the ratio of the virtual metal mesh area 1020b to the antenna pattern 1111 can be formed to be greater than a specified ratio. In this regard, the virtual metal mesh area 1020b can be divided into a first virtual pattern 1020b-R1 and a second virtual pattern 1020b-R2. The antenna performance that changes according to the virtual area starting from the second virtual pattern 1020b-R2 is described.

[0240] Regarding this, Fig. 22 It means in Fig.21 A graph showing the reflection coefficient characteristics and antenna efficiency characteristics that vary depending on the starting position of the closed virtual pattern in the antenna structure. Fig.21 and Fig. 22 (a), when there is no dummy pattern and only the antenna pattern 1111 is formed, the reflection coefficient characteristic is below -10dB in the entire frequency band. On the other hand, when only a closed dummy area such as the second dummy pattern 1020b-R2 is formed, the reflection coefficient characteristic deteriorates to about -5dB. As the interval from the boundary of the antenna pattern 1111 to the boundary of the first dummy pattern 1020b-R1 increases by 0.25, 0.5, and 0.75 wavelengths, the reflection coefficient characteristic improves.

[0241] Reference Fig.21 and Fig. 22 (b), in the case where there is no virtual pattern and only the antenna pattern 1111 is formed, the antenna efficiency characteristic is about -1dB in the entire frequency band. On the other hand, in the case where only a closed virtual area such as the second virtual pattern 1020b-R2 is formed, the antenna efficiency characteristic deteriorates to about -3dB. As the interval from the boundary of the antenna pattern 1111 to the boundary of the first virtual pattern 1020b-R1 increases by 0.25, 0.5, and 0.75 wavelengths, the antenna efficiency characteristic improves. Thus, it can be formed that the starting point of the second virtual pattern 1020b-R2 is separated from the antenna pattern 1111 by 0.5 wavelengths or 0.75 wavelengths. In this regard, considering the wavelength at 70GHz, which is the upper limit frequency in the entire frequency band, 0.5 wavelengths is equivalent to about 2.2mm, and 0.75 wavelengths is equivalent to about 3.2mm.

[0242] Reference Fig.21 and Fig. 22 , indicating that all virtual patterns do not need to be opened. A virtual area separated from the antenna pattern 1111 by a predetermined distance may also be formed by a closed virtual pattern such as the second virtual pattern 1020b-R2. If the inner boundary of the second virtual pattern 1020b-R2 is separated from the outer boundary of the antenna pattern 1111 by a predetermined distance (e.g., 0.5 wavelength) or more, the interference with the antenna pattern 1111 can be kept below a predetermined level.

[0243] In this regard, although the impedance matching characteristics and antenna efficiency of the antenna formed with the second virtual pattern 1020b-R2 separated by a predetermined separation distance are slightly reduced compared to the antenna without the virtual pattern, it can be used as an antenna. Depending on the size and / or shape of the virtual pattern, the antenna performance in a part of the frequency band can still be good even if there is a closed virtual pattern area. However, if the entire working area of ​​the antenna is considered, in order to ensure the performance in the predetermined frequency band, the starting point of the second virtual pattern 1020b-R2 needs to be separated by a distance of at least 0.5 wavelengths.

[0244] On the other hand, the transparent antenna structure of this specification can be designed to work in the Sub6 band in addition to the millimeter wave band. Fig.23a and Figure 23b In addition to the embodiment, a transparent antenna structure of a CPW feeding method that also works in the Sub6 frequency band is shown. Fig.24a Indicates based on Fig.23a and Figure 23b Antenna efficiency and transparency of the antenna structure.

[0245] Fig.23a (a) represents the antenna assembly 1000a without the dummy pattern. Fig.23a (b) shows the antenna component 1000b in which the virtual pattern area is formed by the closed virtual area 1020b-R2. Figure 23b (a) shows an antenna component 1000c in which slits SL are formed at intersections of a virtual grid. Figure 23b (b) shows an antenna element 1000d in which slits SL are formed in the middle of metal lines forming a virtual grid.

[0246] Reference Fig.23a (a) to Figure 23b (b), the antenna pattern 1111 is connected to the connector part CP, so that the signal can be radiated through the connector part CP and the antenna pattern 1111. Ground parts GP are arranged at both sides of the connector part CP to form a CPW feeding structure.

[0247] Fig.23a(a) is a structure in which no dummy pattern is formed on the dielectric substrate 1010. Due to the difference in transparency between the PET of the dielectric substrate 1010 and the metal mesh of the antenna pattern 1111, visibility that can be distinguished from the dielectric substrate 1010 can be generated in the boundary region of the antenna pattern 1111. Fig.23a (b), a closed virtual region 1020b-R2 in which internal metal lines are connected to each other in the same metal mesh structure as the antenna pattern 1111 instead of an open structure may be formed on the dielectric substrate 1010. Although the invisibility of the transparent antenna structure can be improved by applying the closed virtual region 1020b-R2 in the dielectric region of the dielectric substrate 1010, the antenna efficiency is reduced.

[0248] Reference Fig.15a and Figure 23b In (a), the metal line is disconnected by a virtual disconnection line, thereby forming an open area OA. The virtual disconnection line formed to disconnect the metal line can be as follows: Fig.15a The device is formed in a rotating state, but is not limited thereto. Fig.15b and Figure 23b (a), the metal line is disconnected by a virtual disconnection line, and an open area OA can be formed. The virtual disconnection line formed to disconnect the metal line can be as follows Fig.15b The metal lines are formed to move in parallel with respect to the open dummy region 1020 b - R1 , but are not limited thereto.

[0249] Reference Figure 23b , by forming an open virtual region 1020b-R1 in the dielectric region that is not combined with the antenna pattern 1111, having a higher surface resistance than the closed virtual region 1020b-R2. By forming an open area OA at the intersection of the virtual grid forming the open virtual region 1020b-R1 or at the grid line, the invisibility of the transparent antenna structure can be ensured without reducing the antenna efficiency.

[0250] Reference Fig.23a , Figure 23b as well as Fig.24a (a), the antenna efficiency of the first structure without forming a dummy pattern is 87% on average and 77% at minimum. The antenna efficiency of the second structure with a closed dummy region 1020b-R2 is 32% on average and decreases to 8% at minimum. The antenna efficiency of the third structure with an open dummy region 1020b-R1 is 84% ​​on average and 75% at minimum. Thus, the antenna of the third structure with an open dummy region 1020b-R1 formed within a specified interval from the boundary of the radiation conductor portion 1110 can improve the efficiency by more than about 50% compared with the closed dummy region 1020b-R2. The antenna of the third structure can increase the antenna efficiency similarly to the antenna of the first structure without a dummy pattern while improving the invisibility of the transmittance.

[0251] Reference Fig.23a , Figure 23b as well as Fig.24a (b), the transparency of the first structure without forming a dummy pattern is about 84.5-84.6%. The transparency of the third structure formed with an open dummy area 1020b-R1 is about 84.0%, which is almost similar to the transparency of the first structure. In this regard, the dielectric area of ​​the first structure can be formed of PET, and the antenna area can be formed of a metal mesh MM. The dielectric area of ​​the third structure can be formed of PET, and the peripheral area of ​​the antenna area can be formed with an open dummy.

[0252] On the other hand, the transparent antenna structure having the virtual pattern of various embodiments of this specification can also work as an antenna in the Sub6 band in addition to the millimeter wave band. Figure 24b FIG. 1 is a diagram showing the antenna efficiency according to the interval between disconnected lines in a transparent antenna structure that operates as an antenna in the Sub6 band according to an embodiment.

[0253] Reference Figure 7b to Figure 8b and Figure 24b , when the interval between the first interval HG1 and the second interval VG1 of the virtual disconnect line is about 0.1mm, the antenna assembly has an antenna efficiency of about -3dB or more in the 4G band and the 5G band. For 4G and 5G wireless communications, the antenna assembly can send or receive wireless signals in the entire frequency band of the low band (LB), the mid band (MB) and the high band (HB). In the entire frequency band of about 600MHz to 6GHz, the antenna assembly has an antenna efficiency of about -3dB or more.

[0254] When the interval between the first interval HG1 and the second interval VG1 of the virtual disconnect line is about 0.6 mm, the antenna assembly has an antenna efficiency of about -3dB or more in the first frequency band among the low frequency band (LB), the mid-frequency band (MB) and the high frequency band (HB). As the interval between the first interval HG1 and the second interval VG1 increases from about 0.1 mm to 0.6 mm, the antenna efficiency decreases slightly in the second frequency band higher than the first frequency band in the high frequency band (HB). On the other hand, as the interval between the first interval HG1 and the second interval VG1 increases from 0.1 mm to 0.6 mm, the antenna efficiency increases slightly in a part of the frequency bands in the low frequency band (LB) and the mid-frequency band (MB). Thus, in the transparent antenna structure operating in the 4G / 5G frequency band, the interval at which the virtual pattern is disconnected can be set in a range between about 0.1 mm and 0.6 mm.

[0255] Hereinafter, a vehicle having an antenna module according to one aspect of the present specification will be described in detail. Fig.25This shows a configuration in which a plurality of antenna modules disposed at different positions of the vehicle of this specification are combined with other components of the vehicle.

[0256] Reference Figures 1 to 25 The vehicle 500 has a conductive vehicle body that acts as an electrical ground. The vehicle 500 may have a plurality of antennas 1100a to 1100d that may be disposed at different positions of the glass panel 310. The antenna assembly 1000 may be configured such that the plurality of antennas 1100a to 1100d include a communication module 300. The communication module 300 may include a transceiver circuit 1250 and a processor 1400. The communication module 300 may be equivalent to a TCU of the vehicle or constitute at least a portion of a TCU.

[0257] The vehicle 500 may include an object detection device 520 and a navigation system 550. The vehicle 500 may include an additional processor 570 in addition to the processor 1400 included in the communication module 300. The additional processor 570 may be physically distinguished from the processor 1400 or may be functionally distinguished and implemented on a substrate. The processor 1400 may be implemented as a TCU, and the processor 570 may be implemented as an ECU (Electronic Control Unit).

[0258] In the case where the vehicle 500 is an autonomous driving vehicle, the processor 570 may be an autonomous driving integrated controller (ADCU: Automated Driving Control Unit) integrated with an ECU. Based on the information sensed by the camera 531, the radar 532, and / or the laser radar 533, the processor 570 may search for a path and control the increase or decrease of the speed of the vehicle 500. To this end, the processor 570 may be linked with the processor 530 equivalent to the MCU in the object detection device 520 and / or the communication module 300 equivalent to the TCU.

[0259] The vehicle 500 may include a first transparent dielectric substrate 1010a and a second dielectric substrate 1010b configured on a glass panel 310. The first transparent dielectric substrate 1010a may be formed inside the glass panel 310 of the vehicle or attached to the surface of the glass panel 310. The first transparent dielectric substrate 1010a may be configured to form a conductive pattern in the form of a metal mesh. The vehicle 500 may include an antenna module 1100 on one side of the dielectric substrate 1010, wherein the antenna module 1100 is formed with a conductive pattern formed in the shape of a metal mesh to radiate a wireless signal.

[0260] The antenna assembly 1000 may include a first antenna module 1100a to a fourth antenna module 1100d to perform multiple input and output (MIMO). The first antenna module 1100a may be configured at the upper left side of the glass panel 310, the second antenna module 1100b may be configured at the lower left side, the third antenna module 1100c may be configured at the upper right side, and the fourth antenna module 1100d may be configured at the lower right side. The first antenna module 1100a may be referred to as the first antenna ANT1, the second antenna module 1100b may be referred to as the second antenna ANT2, the third antenna module 1100c may be referred to as the third antenna ANT3, and the fourth antenna module 1100d may be referred to as the fourth antenna ANT4. The first antenna ANT1 may be referred to as the first antenna module ANT1, the second antenna ANT2 may be referred to as the second antenna module ANT2, the third antenna ANT3 may be referred to as the third antenna module ANT3, and the fourth antenna ANT4 may be referred to as the fourth antenna module ANT4.

[0261] As described above, the vehicle 500 may include a telematics control unit (TCU) 300 as a communication module. The TCU 300 may be controlled to transmit and receive signals through at least one of the first to fourth antenna modules 1100a to 1100d. The TCU 300 may include a transceiver circuit 1250 and a baseband processor 1400.

[0262] Thus, the vehicle may further include a transceiver circuit 1250 and a processor 1400. A portion of the transceiver circuit 1250 may also be configured in units of antenna modules or a combination thereof. The transceiver circuit 1250 may be controlled so that a wireless signal of at least one of the first to third frequency bands is radiated through antenna modules ANT1 to ANT4. The first to third frequency bands may be a low frequency band (LB), a middle frequency band (MB), and a high frequency band (HB) for 4G / 5G wireless communications, but are not limited thereto.

[0263] The processor 1400 is operably combined with the transceiver circuit 1250 and can be composed of a modem operating at a baseband. The processor 1400 can be configured to receive or send a signal through at least one of the first antenna module ANT1 and the second antenna module ANT2. The processor 1400 can perform a diversity operation or a MIMO operation using the first antenna module ANT1 and the second antenna module ANT2 to transmit the signal to the interior of the vehicle.

[0264] The antenna module may be disposed in different areas on one side and the other side of the glass panel 310. The antenna module may simultaneously receive signals from the front direction of the vehicle and perform multiple input and output (MIMO). In this regard, the antenna module may further include a third antenna module ANT3 and a fourth antenna module ANT4 in addition to the first antenna module ANT1 and the second antenna module ANT2 to perform 4X4 MIMO.

[0265] The processor 1400 may be configured to select an antenna module to communicate with the entity based on the driving path of the vehicle and the communication path of the entity communicating with the vehicle. The processor 1400 may perform MIMO operation using the first antenna module ANT1 and the second antenna module ANT2 based on the direction of the vehicle. Alternatively, the processor 1400 may perform MIMO operation using the third antenna module ANT2 and the second antenna module ANT4 based on the direction of the vehicle.

[0266] The processor 1400 may perform multiple input and output (MIMO) in the first frequency band through two or more antennas among the first antenna ANT1 to the fourth antenna ANT4. The processor 1400 may perform multiple input and output (MIMO) in at least one of the second frequency band and the third frequency band through two or more antennas among the first antenna ANT1 to the fourth antenna ANT4.

[0267] Therefore, when the signal transmission and reception performance of the vehicle decreases in a certain frequency band, the vehicle can transmit and receive signals through other frequency bands. As an example, for a wider communication coverage and connection reliability, the vehicle can preferentially perform communication connection in the first frequency band, which is a low frequency band, and then perform communication connection in the second and third frequency bands.

[0268] The processor 1400 can control the transceiver circuit 1250 to perform carrier aggregation (CA) or dual connectivity (DC) through at least one of the first antenna ANT1 to the fourth antenna ANT4. In this regard, the communication capacity can be expanded by aggregating the second and third frequency bands that are wider than the first frequency band. In addition, the communication reliability can be improved by utilizing a plurality of antenna elements configured in different areas of the vehicle to provide dual connectivity with surrounding vehicles or entities.

[0269] The antenna system having a wideband antenna made of a transparent material and a vehicle having the same have been described above. Next, the technical effects of the antenna system having a wideband antenna made of a transparent material as described above and a vehicle having the same will be described.

[0270] According to the present specification, an antenna component implemented with a transparent material can be constructed in an optimal manner, so that the antenna area and the surrounding dielectric area cannot be distinguished in the transparent antenna structure.

[0271] According to the present specification, an open dummy region having an open area is formed in the dielectric region, thereby minimizing the difference in visibility between the region where the antenna of the transparent material is arranged and other regions.

[0272] According to the present specification, the boundary of the antenna region and the boundary of the dummy pattern region are separated by a prescribed interval, thereby making it possible to ensure the invisibility of the transparent antenna and the antenna assembly including the same without deteriorating the antenna performance.

[0273] According to the present specification, an open dummy structure is formed as a cross point of a metal line of a dummy region or a portion of a metal line is disconnected, thereby ensuring the invisibility of a transparent antenna and an antenna assembly including the same without deteriorating or reducing antenna performance.

[0274] According to the present specification, virtual disconnection lines formed along two axis directions are formed so that metal lines of a virtual area can be disconnected, thereby ensuring the invisibility of the transparent antenna and the antenna assembly including the same without deteriorating the antenna performance.

[0275] According to the present specification, through a virtual disconnection line structure that can be implemented in various structures and shapes, it is possible to ensure invisibility of a transparent antenna and an antenna assembly including the same without deteriorating antenna performance.

[0276] According to the present specification, a transparent antenna having excellent transparency and sheet resistance characteristics can be realized without deteriorating antenna performance by using an irregular metal mesh structure that can be realized in various structures and shapes.

[0277] According to the present specification, visibility can be improved without antenna performance degradation in a transparent antenna through optimal design of a slit having a dummy pattern of an open area and an open area with a radiator area.

[0278] According to the present specification, a broadband antenna structure made of a transparent material that can operate in a broadband, reduce feed loss, and improve antenna efficiency can be provided through vehicle glass or a display area of ​​an electronic device.

[0279] According to the present specification, it is possible to provide a transparent antenna structure that can wirelessly communicate in 4G and 5G frequency bands while minimizing antenna performance variations and transparency differences between an antenna area and a surrounding area.

[0280] According to the present specification, it is possible to provide a transparent antenna structure capable of wireless communication in the millimeter wave frequency band while minimizing antenna performance variation and a transparency difference between an antenna region and a surrounding region.

[0281] The following detailed description will further clarify the additional scope to which this specification can be applied. However, since a person skilled in the art can clearly understand the various changes and modifications within the concept and scope of this specification, it should be understood that the specific embodiments of the preferred embodiments described in detail and this specification are only examples.

[0282] In connection with the aforementioned present specification, the design and driving of the antenna assembly including the transparent antenna and the vehicle controlling it can be implemented by a computer-readable code on a medium having a program recorded thereon. Computer-readable media include all types of storage devices storing data that can be read by a computer system. Examples of computer-readable media include HDD (Hard Disk Drive), solid-state drive (Solid State Disk, SSD), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and can also be implemented in the form of a carrier wave (e.g., Internet-based transmission). In addition, the computer may also include a control unit of the terminal. Therefore, the detailed description described above should not be construed as restrictive in all respects, but should be construed as exemplary. The scope of this specification should be determined by a reasonable interpretation of the attached claims, and all changes within the equivalent scope of this specification should fall within the scope of this specification.

Claims

1. An antenna assembly, wherein: include: The first layer is implemented as a dielectric substrate formed of a transparent dielectric substance; as well as A second layer is formed in a metal mesh shape on one side of the dielectric substrate; The second layer includes: A metal mesh radiator region, composed of metal wires and open areas that implement an irregular mesh shape below a specified wire width to transmit and receive wireless signals; and A virtual metal mesh region, composed of metal wires and slits realizing an irregular mesh shape below a specified wire width; The metal mesh radiator region is formed with a first transmittance, and the virtual metal mesh region is formed with a second transmittance higher than the first transmittance, The virtual metal mesh area is separated from the outer contour area of ​​the metal mesh radiator area by a gap, The irregular mesh shape of the virtual metal mesh area overlaps with the virtual break lines formed along the two-axis directions to form an open area. The virtual break line and the polygon formed by the metal wire in the irregular grid shape are formed so as to overlap in a line width region corresponding to the inside of the polygon. The virtual break lines are formed at equal intervals in the virtual metal mesh area.

2. The antenna assembly according to claim 1, characterized in that: The first transmittance of the metal mesh radiator region is greater than 80%, The second transmittance of the virtual metal mesh area is greater than 82%, The sheet resistance of the metal mesh radiator region is less than 1Ω / sq.

3. The antenna assembly according to claim 1, characterized in that: The difference between the first transmittance of the metal mesh radiator region and the second transmittance of the virtual metal mesh region is 2% or less. A portion of the boundary of the virtual metal mesh area and the boundary of the metal mesh radiator area are separated by a gap, The boundary of the virtual metal mesh area and the boundary of the metal mesh radiator area are less than 200um.

4. The antenna assembly according to claim 1, characterized in that: The line width of the dummy pattern in the dummy metal mesh area is 5.2um to 5.4um, and the thickness is 6.0um to 6.3um.

5. The antenna assembly according to claim 1, characterized in that: The antenna pattern realized by the metal mesh radiator region operates in the operating frequency band of 800MHz to 3000MHz. The interval of the virtual breaking lines in the virtual metal mesh area is set to be less than 1 / 10 of the wavelength, and at a reference frequency of 3000 MHz in the working frequency band of the antenna pattern, the interval of the virtual breaking lines is set to be less than 10 mm.

6. The antenna assembly according to claim 1, characterized in that: In the case where the pitch of the metal wires of the irregular mesh shape is formed in the range of 100 to 150 um, the sheet resistance of the irregular mesh shape is formed in the range of 0.47 to 0.89 Ω / sq.

7. The antenna assembly according to claim 1, characterized in that: The virtual pattern of the virtual metal mesh area is configured to be disconnected in the longitudinal and transverse directions. A coupling between the antenna pattern implemented by the metal mesh radiator region and the dummy pattern configured to be disconnected in the longitudinal direction and the lateral direction is reduced compared to a second coupling between the antenna pattern and the dummy patterns connected to each other.

8. The antenna assembly according to claim 7, characterized in that: The boundary of the dummy pattern is disconnected from the boundary of the metal wire of the metal mesh radiator region at a distance of less than 100 um.

9. The antenna assembly according to claim 1, characterized in that: In the virtual metal mesh area, the vertical virtual break lines are separated by a second interval in the horizontal direction, and the horizontal virtual break lines are separated by a first interval in the vertical direction. The first interval and the second interval are set to be larger than the interval between the boundary of the dummy metal mesh region and the boundary of the metal mesh radiator region.

10. The antenna assembly according to claim 1, characterized in that: A first area of ​​the virtual metal mesh area within a predetermined interval from the boundary of the metal mesh radiator area forms an open virtual area having slits interrupted by the irregular mesh shape.

11. The antenna assembly according to claim 10, characterized in that: A second area of ​​the virtual metal mesh area that is at a predetermined distance from the boundary of the metal mesh radiator area forms a closed virtual area where the irregular grid shapes are connected to each other.

12. The antenna assembly according to claim 10, characterized in that: The predetermined interval is set to be 1 / 4 to 1 / 2 of a wavelength corresponding to an upper limit frequency of an operating frequency of the antenna pattern realized by the metal mesh radiator region.

13. An antenna assembly, wherein: include: The first layer is implemented as a dielectric substrate formed of a transparent dielectric substance; as well as A second layer is formed in a metal mesh shape on one side of the dielectric substrate, and includes a first region and a second region formed adjacent to the first region; The second layer includes: The metal mesh radiator region is composed of metal wires and open areas that realize an irregular mesh shape below a specified wire width to transmit and receive wireless signals; a virtual metal mesh region, composed of metal wires and slits realizing an irregular mesh shape below a specified wire width; and A connector portion configured to be connected to the metal mesh radiator region to transmit a signal; The metal mesh radiator area and the virtual metal mesh area form the first area, and the connector portion forms the second area. The metal mesh radiator region is formed with a first transmittance, the virtual metal mesh region is formed with a second transmittance higher than the first transmittance, and the connector portion is formed with a third transmittance lower than the first transmittance. The virtual metal mesh area is separated from the outer contour area of ​​the metal mesh radiator area by a gap, The irregular mesh shape of the virtual metal mesh area overlaps with the virtual break lines formed along the two-axis directions to form an open area. The virtual break line and the polygon formed by the metal wire in the irregular grid shape are formed so as to overlap in a line width region corresponding to the inside of the polygon. The virtual break lines are formed at equal intervals in the virtual metal mesh area.

14. The antenna assembly according to claim 13, characterized in that: The first transmittance of the metal mesh radiator region is greater than 80%, The second transmittance of the virtual metal mesh area is greater than 82%, The third transmittance of the connector portion is 70% or less, The sheet resistance of the metal mesh radiator region is less than 1Ω / sq.

15. The antenna assembly according to claim 13, characterized in that: The difference between the first transmittance of the metal mesh radiator region and the second transmittance of the virtual metal mesh region is 2% or less. A portion of the boundary of the virtual metal mesh area and the boundary of the metal mesh radiator area are separated by a gap, The boundary of the virtual metal mesh area and the boundary of the metal mesh radiator area are less than 200um.

16. The antenna assembly according to claim 13, characterized in that: The line width of the dummy pattern in the dummy metal mesh area is 5.2um to 5.4um, and the thickness is 6.0um to 6.3um.

17. The antenna assembly according to claim 13, characterized in that: The antenna pattern realized by the metal mesh radiator region operates in the operating frequency band of 800MHz to 3000MHz. The interval between the virtual breaking lines in the virtual metal mesh area is set to be less than 1 / 10 of the wavelength, and taking 3000 MHz in the working frequency band of the antenna pattern as the reference frequency, the interval between the virtual breaking lines is set to be less than 10 mm.

18. The antenna assembly according to claim 13, wherein: In the case where the pitch of the metal wires of the irregular mesh shape is formed in the range of 100 to 150 um, the sheet resistance of the irregular mesh shape is formed in the range of 0.47 to 0.89 Ω / sq.

19. The antenna assembly according to claim 13, characterized in that: The virtual pattern of the virtual metal mesh area is configured to be disconnected in the longitudinal and transverse directions. The coupling between the antenna pattern implemented by the metal mesh radiator region and the dummy pattern configured to be disconnected in the longitudinal direction and the transverse direction is reduced compared to the second coupling between the antenna pattern and the dummy patterns connected to each other, The boundary of the dummy pattern is disconnected from the boundary of the metal wire of the metal mesh radiator region at a distance of less than 100 um.

20. The antenna assembly according to claim 13, wherein: In the virtual metal mesh area, the vertical virtual break lines are separated by a second interval in the horizontal direction, and the horizontal virtual break lines are separated by a first interval in the vertical direction. The first interval and the second interval are set to be larger than the interval between the boundary of the dummy pattern and the boundary of the metal line.

21. The antenna assembly according to claim 13, wherein: A first area of ​​the virtual metal mesh area within a predetermined interval from the boundary of the metal mesh radiator area forms an open virtual area having slits interrupted by the irregular mesh shape.

22. The antenna assembly according to claim 21, characterized in that The second area of ​​the virtual metal mesh area is more than a specified distance away from the boundary of the metal mesh radiator area, forming a closed virtual area connected to each other in the irregular grid shape, The predetermined interval is set to be 1 / 4 to 1 / 2 of a wavelength corresponding to an upper limit frequency of an operating frequency of the antenna pattern realized by the metal mesh radiator region.

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