Glass substrate module disposed in vehicle

Abstract

This glass substrate module may comprise: a first glass substrate; a second glass substrate laminated on the first glass substrate; an antenna pattern formed on a first surface of the first glass substrate; an artificial magnetic conductor (AMC) structure formed between a second surface of the first glass substrate and a first surface of the second glass substrate; and a partial reflector surface (PRS) structure formed on a second surface of the second glass substrate.

Description

Glass substrate module placed in a vehicle

[0001] This specification relates to a glass substrate module for use on a vehicle. A particular embodiment relates to a glass substrate module comprising a transparent antenna on a vehicle windshield. Another embodiment relates to a flexible printed circuit board comprising multiple layers that can be placed on a vehicle windshield.

[0002] Vehicles can perform wireless communication services with other vehicles, surrounding objects, infrastructure, or base stations. In this regard, various communication services can be provided through wireless communication systems utilizing LTE or 5G communication technologies. Meanwhile, some LTE frequency bands may be allocated to provide 5G communication services.

[0003] Meanwhile, the vehicle body and roof are made of metal, which poses a problem of radio wave blocking. Therefore, a separate antenna structure can be placed on the upper portion of the vehicle body or roof. Alternatively, if the antenna structure is placed on the lower portion of the vehicle body or roof, the portion of the vehicle body or roof corresponding to the antenna placement area can be formed of a non-metallic material.

[0004] However, from a design perspective, the vehicle body or roof needs to be formed as one piece. In such cases, the exterior of the vehicle body or roof may be formed of metal. Consequently, there is a risk that the vehicle body or roof may significantly reduce antenna efficiency.

[0005] In this regard, transparent antennas can be placed on the glass corresponding to the vehicle's window to increase communication capacity without changing the vehicle's exterior design. However, there is a problem in that the antenna radiation efficiency and impedance bandwidth characteristics deteriorate due to the electrical loss of the transparent material antenna.

[0006] Meanwhile, transparent antennas and other types of antennas may be placed on the vehicle window together with the transparent antenna. In this regard, the transparent antenna may be designed to radiate signals in the 4G / 5G wireless communication frequency bands. The transparent antenna and other types of antennas may be formed as film-based antennas. The film-based antenna may be designed to radiate signals in the Wi-Fi frequency bands (2.4 GHz, 5 GHz, 7 GHz).

[0007] In this regard, the film antenna may be positioned adjacent to the transparent antenna or on the same layer. Interference may occur between the film antenna and the transparent electrode forming the transparent antenna at 2.4 GHz, which has a long wavelength in the Wi-Fi frequency band. This interference between the film antenna and the transparent electrode forming the transparent antenna may cause beam distortion.

[0008] Meanwhile, when placing an antenna module on a vehicle window, the beam peak of the antenna elements' radiation pattern may be formed in a direction other than the horizontal direction of the vehicle, depending on the angle of inclination of the vehicle window. Therefore, there is a problem that communication performance may be degraded in the horizontal direction when placing an antenna module on a vehicle window.

[0009] The purpose of this specification is to prevent degradation of communication performance in the horizontal direction when an antenna module is placed on a vehicle window.

[0010] The purpose of this specification is to change the direction of the beam pattern of an antenna element in the horizontal direction when placing the antenna module on a vehicle windshield.

[0011] The purpose of this specification is to improve communication performance by reducing the feed loss of a film material antenna.

[0012] The purpose of this specification is to reduce interference between multiple antennas in a glass substrate module including transparent antennas in a vehicle window.

[0013] The purpose of this specification is to prevent distortion of beam shape due to interference between a film material antenna and a transparent electrode forming a transparent antenna.

[0014] A glass substrate module according to one aspect of the present specification for achieving the above or other purposes may include a first glass substrate; a second glass substrate formed by being laminated on the first glass substrate; an antenna pattern formed on a first surface of the first glass substrate; an AMC (artificial magnetic conductor) structure formed between a second surface of the first glass substrate and a first surface of the second glass substrate; and a PRS (partial reflector surface) structure formed on the second surface of the second glass substrate.

[0015] As an example, the glass substrate module may further include a reflector formed on a first surface of the first glass substrate and formed in an area facing the AMC structure.

[0016] In an embodiment, the PRS structure may be formed to reflect a portion of a signal radiated from the antenna pattern and transmit the remainder of the signal. A transmission angle of a signal transmitting the PRS structure may be formed at a different angle from an incident angle of the signal, such that a direction of a wavefront of a signal transmitting the PRS structure may be steered by the transmission angle. The AMC structure may be formed to reflect a signal reflected and incident on the PRS structure so that the signal is incident on the PRS structure.

[0017] In an embodiment, the reflector may include a first reflector disposed spaced apart from one end of the antenna pattern; and a second reflector disposed spaced apart from the other end of the antenna pattern.

[0018] As an example, the distance between the reflector and the third antenna pattern portion on which the antenna pattern is formed may be set to be 0.03 times or more of the wavelength corresponding to the lowest operating frequency of the WiFi frequency band.

[0019] In an embodiment, the AMC structure may include a first AMC structure formed in an area facing the first reflector; and a second AMC structure formed in an area facing the second reflector.

[0020] In an embodiment, the antenna pattern may be arranged in a region having a first width in the X-axis direction and a first length in the Y-axis direction. The PRS structure may include a plurality of PRS patterns arranged in a spaced apart manner in parallel in the X-axis direction within the region having a second width in the X-axis direction and the first length in the Y-axis direction. The plurality of PRS patterns may include first PRS patterns arranged to be spaced apart from one end of the antenna pattern and second PRS patterns arranged to be spaced apart from the other end of the antenna pattern.

[0021] A flexible printed circuit board composed of a plurality of layers according to another aspect of the present specification may include a first antenna pattern portion formed on a transparent substrate positioned between a first glass substrate and a second glass substrate, a first antenna connection portion connected to the second antenna pattern portion, and a second antenna connection portion; an antenna pattern formed on a first surface of the first glass substrate; a first metal structure formed between a second surface of the first glass substrate and a first surface of the second glass substrate; and a second metal structure formed on a second surface of the second glass substrate.

[0022] As an example, the flexible printed circuit board may further include a third metal structure formed on a first surface of the first glass substrate and formed in an area facing the AMC structure.

[0023] The technical effects of a glass substrate module including a transparent antenna in a vehicle glass and a flexible circuit substrate including multiple layers are described as follows.

[0024] According to this specification, when an antenna module is placed on a vehicle window, metal structures can be placed adjacent to the antenna element to optimally change the beam pattern and improve communication performance.

[0025] According to the present specification, when an antenna module is placed on a vehicle window, the direction of the beam pattern of the antenna element can be changed in the horizontal direction by placing metal structures adjacent to the antenna element.

[0026] According to this specification, a film material antenna can be implemented in an on-glass structure and communication performance can be improved by reducing feed loss through slot-coupled feed.

[0027] According to the present specification, in a glass substrate module including a transparent antenna of a vehicle glass, a film material antenna and a plurality of metal structures are formed on a flexible circuit board, thereby reducing interference between the plurality of antennas.

[0028] According to the present specification, by forming a film material antenna and a plurality of metal structures on a flexible circuit board, distortion of a beam shape due to interference between the film material antenna and a transparent electrode forming a transparent antenna can be prevented.

[0029] Further scope of the applicability of this specification will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of this specification will be apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments, are given by way of example only.

[0030] FIG. 1 is a drawing illustrating a vehicle according to an embodiment of the present specification.

[0031] Figure 2 is a configuration diagram of a vehicle according to an embodiment of the present specification.

[0032] Figure 3 shows a perspective view of a vehicle glass that can be joined or attached to the frame of the vehicle.

[0033] Figure 4 shows a cross-sectional view of the glass of Figure 3 and the frame of the vehicle combined.

[0034] Figure 5 shows an antenna assembly and connector structure arranged in a transparent area and an opaque area of ​​a vehicle's glass.

[0035] Figure 6 shows the radiation pattern of an antenna in a structure in which an antenna module is placed on the front windshield and side windshield of a vehicle.

[0036] Figure 7 shows a front view of a glass substrate module having a transparent antenna module and an antenna pattern operating in the WiFi band.

[0037] FIG. 8 shows a cross-sectional view of a glass substrate module having a plurality of metal structures formed thereon to steer a beam pattern radiated from an antenna pattern according to the present specification.

[0038] Figure 9 shows the radiation pattern of an antenna pattern operating in WiFi frequency bands.

[0039] FIG. 10 shows a front view of an AMC structure of a glass substrate module according to the present specification and a perspective view of a glass substrate on which the AMC structure is arranged.

[0040] Fig. 11 shows the phase value of the reflection loss of the AMC structure of the glass substrate module according to the present specification.

[0041] FIG. 12 shows a front view of an antenna pattern according to an embodiment and a PRS structure arranged non-overlapping or overlapping.

[0042] Fig. 13 shows a structure in which a flexible circuit board is combined with the glass substrate module of Fig. 7.

[0043] Fig. 14 shows a front view of a glass substrate module having the AMC structure of Fig. 10.

[0044] Fig. 15 shows a perspective view of a glass substrate module having the PRS structure of Fig. 12(a).

[0045] FIGS. 16A and 16B illustrate perspective views of a glass substrate module according to the present disclosure, wherein reflectors are arranged adjacent to an antenna pattern.

[0046] Figure 17 is an enlarged view of a flexible circuit board having reflectors formed on one side and the other side of the antenna pattern.

[0047] FIG. 18 is a perspective view showing AMC structures arranged adjacent to an antenna pattern and a different layer in a glass substrate module according to the present specification.

[0048] Figure 19 is an enlarged view of a flexible circuit board having an AMC structure arranged adjacent to a feed pattern and reflectors formed on one side and the other side of the antenna pattern.

[0049] FIG. 20 is a perspective view showing a glass substrate module according to the present specification in which a PRS structure is arranged on a different layer from the antenna pattern.

[0050] Figure 21 shows a front view of a glass substrate module in which an AMC structure is formed on only one side of the antenna pattern.

[0051] Figure 22 shows radiation patterns depending on the presence or absence of the AMC structure.

[0052] Figure 23 compares radiation patterns with and without an AMC structure in the WiFi frequency band.

[0053] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably only for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of this specification.

[0054] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0055] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0056] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0057] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0058] Below, a transparent antenna module according to the present specification and a method for manufacturing the same are described in detail. In this regard, FIG. 1 is a drawing illustrating a vehicle according to an embodiment of the present specification.

[0059] Referring to FIG. 1, a vehicle (1) may be equipped with at least one communication antenna. The vehicle (1) may transmit and / or receive signals of various frequency bands using the communication antenna. The vehicle (1) may perform communication such as V2V (Vehicle-to-Vehicle), V2I (Vehicle to Infrastructure), V2P (Vehicle-to-Pedestrian), and V2N (vehicle-to-network).

[0060] The above antenna may be composed of a substrate made of a material such as PET (polyethylene terephthalate) and an antenna pattern formed on the substrate. For example, the antenna may be a transparent antenna.

[0061] The above antenna may be disposed on the dielectric of the vehicle (1). The above antenna may be disposed on the glass of the vehicle (1). The above antenna may be coupled or attached to a front windshield (101), door glass (102, 103), quarter glass (104), rear windshield (not shown), side mirror (not shown), sunroof (105), or lamp glass (106). For example, the above antenna may be a transparent antenna.

[0062] FIG. 2 is a configuration diagram of a vehicle according to an embodiment of the present specification. Referring to FIG. 2, the vehicle (1) may include an object detection device (410), a communication device (420), a user interface device (431), a driving operation device (432), a vehicle driving device (433), a driving system (434), a navigation system (435), a sensing unit (436), an interface unit (437), a memory (438), a power supply unit (439), and / or a control unit (440). Alternatively, the vehicle (1) may include additional configurations in addition to the above configurations, or may omit some of the above configurations.

[0063] The object detection device (410) may be a device for detecting an object located outside the vehicle (1). For example, the object detection device (410) may include a processor (411), a camera (412), a radar (413), a lidar (414), an ultrasonic sensor (415), and / or an infrared sensor (416).

[0064] The communication device (420) may be a device for performing communication with an external device. The communication device (420) may include at least one of a transmitting antenna, a receiving antenna, an RF (Radio Frequency) circuit or an RF element capable of implementing various communication protocols for performing communication. For example, the communication device (420) may include a processor (421), a short-range communication unit (422), a location information unit (423), a V2X communication unit (424), an optical communication unit (425), a broadcast transceiver unit (426), and / or an ITS communication unit (427).

[0065] The user interface device (431) may be a device for interaction between the vehicle (1) and a user. The vehicle (1) may implement a UI (User Interface) or UX (User Experience) through the user interface device (431).

[0066] The driving control device (432) may be a device that receives user input for driving. The vehicle driving device (433) may be a device that electrically controls the operation of various devices within the vehicle (1). The driving system (434) may be a system that controls various operations of the vehicle (1). The navigation system (435) may provide navigation information. The sensing unit (436) may sense the status of the vehicle (1).

[0067] The interface unit (437) can serve as a passageway for various types of external devices connected to the vehicle (1). The memory (438) can store basic data for the units of the vehicle (1), control data for controlling the operation of the units, input / output data, etc. The power supply unit (439) can supply power required for the operation of each component. The control unit (440) can control the overall operation of each unit within the vehicle (1). The control unit (440) can be implemented as an ECU (Electronic Control Unit) and / or a TCU (Telematics Control Unit).

[0068] Meanwhile, the vehicle glass, incorporating the transparent antenna module according to the present specification, can be combined with the vehicle frame. In this regard, Fig. 3 illustrates a perspective view of vehicle glass that can be combined or attached to the vehicle frame. Fig. 4 illustrates a cross-sectional view of the glass of Fig. 3 combined with the vehicle frame.

[0069] Referring to FIGS. 3 and 4, the glass (10, 10') can be coupled or attached to the frame (9) of the vehicle and can cover the opening (9h) of the frame (9). For example, the glass (10, 10') can be glass of the vehicle (1), such as the front windshield (101), door glass (102, 103), quarter glass (104), rear windshield, side mirror, sunroof (105), or lamp glass (106) of FIG. 1.

[0070] The groove (9g) of the frame (9) may extend along the edge of the glass (10, 10') and define the boundary of the opening (9h). For example, the frame (9) may include a metal material, and a sealant (7, sealant) may be filled between the groove (9g) and the glass (10, 10'). The groove (9g) may be formed to have a step with respect to the inner boundary of the frame (9). The glass (10) having an opaque area (12) formed therein may be placed in the groove (9g) formed to have a step with respect to the inner end of the frame (9). As the glass (10) is placed in the groove (9g), the step of the groove (9g) may be regarded as non-existent from the outside of the vehicle.

[0071] The antenna (20) may be positioned on one surface of the glass (10) or inside the glass (10). The antenna (20) may be transparent. The antenna (20) may be flexible.

[0072] A connection module (100) including a connector (100c) can be disposed between an edge of a glass (10, 10') and an antenna (20), and can be located on one surface of the glass (10, 10'). The connector (100c) of the connection module (100) can be electrically connected to the antenna (20) through a substrate (30). An inner cover (8) can be opposite the glass (10) with respect to the frame (9) and can cover the connection module. The inner cover (8) can be referred to as an interior cover (8). The connection module can be referred to as a connector device, a Parkra jack portion, or a connector assembly.

[0073] Meanwhile, a vehicle antenna assembly implementing a transparent antenna module according to the present specification can be placed in transparent and opaque areas of a vehicle's glass. In this regard, FIG. 5 illustrates an antenna assembly and a connector structure placed in the transparent and opaque areas of a vehicle's glass.

[0074] Referring to FIG. 5, the glass (10) may include a transparent region (11) and an opaque region (12). The opaque region (12) may be a black mask region or a frit region. For example, the transparent region (11) may occupy most of the glass (10), and the opaque region (12) may be adjacent to one edge of the glass (10). The transparent region (11) and the opaque region (12) may be formed with the same width (W10), and the height (H11) of the transparent region (11) may be greater than the height (H12) of the opaque region (12).

[0075] The antenna (20) may be positioned on the transparent area (11) adjacent to the boundary between the transparent area (11) and the opaque area (12). A connection module including a connector (100c) may be positioned on the opaque area (12), and the connector (100c) of the connection module may be connected to the antenna (20) through the housing lower plate (111). The housing lower plate (111) may be fastened to the housing upper plate (112) to form a housing (110). The connector (100c) may be accommodated inside the housing (110). The housing (110) in which the connector (100c) is accommodated may be placed in the opaque area (12). Meanwhile, at least a part of the connection module may be positioned in the transparent area (11).

[0076] Hereinafter, a glass substrate module having a transparent antenna module formed on a vehicle glass according to the present specification will be described. In this regard, FIG. 6 illustrates the radiation pattern of an antenna in a structure in which an antenna module is placed on the front and side windows of a vehicle.

[0077] Referring to Fig. 6(a), the side glass is arranged to be inclined at a certain angle or more with respect to the horizontal plane. For example, the side glass may be arranged to be inclined at a first angle (θ1) of about 75 degrees with respect to the horizontal plane. In a structure in which a transparent antenna is arranged on the side glass, the radiation pattern of the antenna is formed perpendicular to the side glass. For example, in a structure in which a transparent antenna is arranged on the side glass, the radiation pattern of the antenna is formed at about 15 degrees with respect to the horizontal plane. In a structure in which a transparent antenna is arranged on the side glass, the radiation pattern of the antenna is formed at about 75 degrees with respect to the vertical plane. Therefore, the low elevation angle requirement of 70-90 degrees, which is a requirement for the beam steering direction of the transparent antenna, is satisfied.

[0078] Referring to Fig. 6(b), the front glass or the rear glass is arranged to be inclined at a certain angle or less with respect to the horizontal plane. For example, the front glass may be arranged to be inclined at a second angle (θ2) of about 30 degrees with respect to the horizontal plane. In a structure in which a transparent antenna is arranged on the front glass, the radiation pattern of the antenna is formed perpendicular to the front glass. For example, in a structure in which a transparent antenna is arranged on the front glass, the radiation pattern of the antenna is formed at about 60 degrees with respect to the horizontal plane. In a structure in which a transparent antenna is arranged on the front glass, the radiation pattern of the antenna is formed at about 30 degrees with respect to the vertical plane. Therefore, it is difficult to satisfy the low elevation angle requirement of 70-90 degrees, which is a requirement for the beam steering direction of the transparent antenna.

[0079] In this regard, a transparent antenna can be formed using a single-layer transparent electrode structure. The radiation direction of a single-layer transparent antenna is vertical to the plane on which the antenna is placed. Therefore, in structures that are tilted below a certain angle relative to the horizontal plane, such as a front or back glass, the beam steering direction of the transparent antenna is difficult to satisfy the low-elevation angle requirement.

[0080] A glass substrate module having a transparent antenna module formed on a vehicle glass according to the present specification can be arranged in a transparent area and an opaque area. In this regard, FIG. 7 illustrates a front view of a glass substrate module having a transparent antenna module and an antenna pattern operating in a WiFi band arranged thereon. Meanwhile, FIG. 8 illustrates a cross-sectional view of a glass substrate module having a plurality of metal structures formed thereon to steer a beam pattern radiated from an antenna pattern according to the present specification.

[0081] Referring to FIG. 7, a glass substrate module (1000) may include an antenna pattern (1100p) that operates in WiFi frequency bands and a transparent antenna module (1100). The antenna pattern (1100p) may be formed on a first surface of a first glass substrate (1010a). The transparent antenna module (1100) may be disposed between the first glass substrate (1010a) and the second glass substrate (1010b). The transparent antenna module (1100) may include a first antenna pattern portion (1100-1) and a second antenna pattern portion (1100-2). The antenna pattern (1100p) may be disposed between the first antenna pattern portion (1100-1) and the second antenna pattern portion (1100-2).

[0082] A glass substrate module (1000) according to the present specification may further include a control unit (1400) and a connection unit (1000CL). The control unit (1400) may be configured to control a transparent antenna module (1100). The connection unit (1000CL) may be configured to electrically connect the transparent antenna module (1100) and the control unit (1400). The connection unit (1000CL) may comprise a flexible printed circuit board (FPCB) (1200) and a coaxial cable (610). The transparent antenna module (1100) may include a first antenna pattern unit (1100-1) and a second antenna pattern unit (1100-2).

[0083] A flexible printed circuit board (1200) may be configured to include a plurality of power supply patterns and a plurality of ground patterns. The flexible printed circuit board (1200) may be formed of a plurality of layers.

[0084] A first antenna connection portion (1210) of a flexible printed circuit board (1200) may include a first feed pattern (1210f) and a plurality of first ground patterns (1211g, 1212g). The first feed pattern (1210f) may be arranged in a first layer among a plurality of layers. And the plurality of first ground patterns (1211g, 1212g) may be arranged on both sides of the first feed pattern (1210f). Accordingly, the first feed pattern (1210f) and the plurality of first ground patterns (1211g, 1212g) may form a co-planar waveguide (CPW) structure.

[0085] The third connection substrate portion (1230b) of the flexible printed circuit board (1200) may include a second power supply pattern and a plurality of second ground patterns arranged on both sides of the second power supply pattern. The first cable connection portion (1210c) of the flexible printed circuit board (1200) may include a third power supply pattern and a plurality of third ground patterns arranged on both sides of the third power supply pattern.

[0086] The second antenna connection portion (1220) of the flexible printed circuit board (1200) may include a fourth feed pattern (1240f) and a plurality of fourth ground patterns (1241g, 1242g). The fourth feed pattern (1240f) may be arranged in a first layer among the plurality of layers. The plurality of fourth ground patterns (1241g, 1242g) may be arranged on both sides of the fourth feed pattern (1240f). Accordingly, the fourth feed pattern (1240f) and the plurality of fourth ground patterns (1241g, 1242g) may form a CPW structure.

[0087] The fourth connection substrate portion (1240b) of the flexible printed circuit board (1200) may include a fifth power supply pattern and a plurality of fifth ground patterns arranged on both sides of the fifth power supply pattern. The second cable connection portion (1220c) of the flexible printed circuit board (1200) may include a sixth power supply pattern and a plurality of sixth ground patterns arranged on both sides of the sixth power supply pattern.

[0088] An antenna pattern (1100p) operating in a WiFi frequency band may be arranged on a first connection substrate portion (1210b) of a flexible printed circuit board (1200). The antenna pattern (1100p) may be implemented as a slot antenna including a plurality of slots. The antenna pattern (1100p) may be configured to include first to fourth slot portions (SL1, SL2, SL3, SL4). A signal line (SL) may be arranged so that a third coaxial cable (613) is connected to the flexible printed circuit board (1200). Signals may be applied to a point of the signal line (SL) through an internal conductor of the third coaxial cable (613). A first slot portion (SL1) and a second slot portion (SL2) may be formed on one side and the other side of the signal line (SL), respectively. The first width of the first slot portion (SL1) formed at the lower end of the signal line (SL) may be formed narrower than the second width of the first slot portion (SL1) formed at one side of the signal line (SL).

[0089] A first slot portion (SL1) may be connected to a first point on one side of a second slot portion (SL2). A third slot portion (SL3) may be connected to a second point on the other side of the second slot portion (SL2) and may extend in the X-axis direction by a predetermined length. A fourth slot portion (SL4) may be connected to an upper end of the second slot portion (SL2) and may extend in the X-axis direction by a predetermined length. The fourth slot portion (SL4) may be formed to extend in an opposite direction to the third slot portion (SL3).

[0090] A first connection substrate portion (1210b) may be formed to prevent interference between an antenna pattern (1100p) operating in a WiFi frequency band and a transparent antenna module (1100) operating in a 4G / 5G frequency band. In this regard, a glass substrate module having an antenna pattern according to the present specification will be described in detail with reference to FIGS. 7 and 8.

[0091] Referring to FIGS. 7 and 8, a glass substrate module (1000) having an antenna pattern according to the present specification will be described. In this regard, in a vehicle double-laminated glass structure, a transparent antenna module (1100) is disposed between first and second glass substrates (1010a, 1010b) in an in-glass structure. The transparent antenna electrode may be implemented in a structure in which the transparent antenna electrode is inserted inside a PVB film between the first and second glass substrates (1010a, 1010b). In this regard, the WIFI antenna pattern made of a film material may be designed in an on-glass structure to minimize power loss and cable loss during power supply.

[0092] A flexible printed circuit board (1200) having feed patterns for feeding a transparent antenna module (1100) and an antenna pattern (1100p) formed thereon may be formed to bend from a transparent electrode inside the glass to the outside. The film-material WIFI antenna pattern may be designed to be positioned at a position where the isolation from the transparent antenna module (1100) is maximized. The present specification is for beam steering in an antenna pattern (1100p) made of a film material operating in a WIFI band that is integrated into an FPCB area of ​​a 4G / 5G transparent antenna. By forming a plurality of metal structures in a peripheral area adjacent to the antenna pattern (1100p), beam steering can be implemented in a desired direction for a signal radiated from the antenna pattern (1100p).

[0093] Meanwhile, a glass substrate module (1000) according to the present specification includes a glass substrate (1010) and an antenna pattern (1100p). The conductive patterns including the antenna pattern (1100p) formed on the glass substrate (1010) can be configured to tilt the beam direction by a predetermined angle in the vertical direction.

[0094] The antenna pattern (1100p) may be arranged on the first connection substrate portion (1210b) of the flexible printed circuit board (1200). The third antenna pattern portion (1100-3) on which the antenna pattern (1100p) is formed may be arranged at the center of the first connection substrate portion (1210b) of the flexible printed circuit board (1200).

[0095] The glass substrate (1010) may be formed into a multilayer glass substrate structure including a first glass substrate (1010a) and a second glass substrate (1010b). The second glass substrate (1010b) may be formed by being laminated to the first glass substrate (1010a). The first glass substrate (1010a) and the second glass substrate (1010b) may be referred to as an upper glass substrate and a lower glass substrate, respectively.

[0096] The transparent antenna module (1100) disposed between the first and second glass substrates (1010a, 1010b) is implemented as an in-glass antenna. The antenna pattern (1100p) disposed on the first surface of the first glass substrate (1010a) is implemented as an on-glass antenna. The antenna pattern (1100p) in the form of a film, such as a flexible circuit board (1200), can be optimally disposed between the first and second antenna pattern portions (1100-1, 1100-2) through a heuristic technique. The antenna pattern (1100p) can be disposed in consideration of the distance from the feeding patterns (1210f, 1240f) that feed the first and second antenna pattern portions (1100-1, 1100-2).

[0097] As described above, the vehicle transparent antenna (1100) is implemented as an in-glass antenna between laminated first and second glass substrates (1010a, 1010b). The thickness of the glass substrate (1010) including the first and second glass substrates (1010a, 1010b) has different electrical lengths depending on the WiFi frequency band. Accordingly, the antenna pattern operating in the WiFi frequency bands has different radiation patterns depending on the frequency band. In this regard, FIG. 9 illustrates a radiation pattern of an antenna pattern operating in the WiFi frequency bands. FIG. 9(a) illustrates a radiation pattern of an antenna pattern operating in a 2.5 GHz band. FIG. 9(b) illustrates a radiation pattern of an antenna pattern operating in a 5.7 GHz band.

[0098] Referring to FIGS. 7 to 9(a), the radiation pattern of the antenna pattern (1100p) implemented on a glass substrate (1010) with a thickness of about 6 mm in the 2.5 GHz band is formed as an omnidirectional radiation pattern. Referring to FIGS. 7, 8, and 9(b), the radiation pattern of the antenna pattern (1100p) implemented on a glass substrate (1010) with a thickness of about 6 mm in the 5.7 GHz band is formed in a glass-side direction that is 180 degrees from the front coordinate when it has more directivity.

[0099] Therefore, when the antenna pattern (1100p) is arranged on the front glass or the rear glass as shown in Fig. 6(b), it is difficult for the radiation pattern of the antenna pattern (1100p) in the 5 GHz band to satisfy the low elevation angle requirement. Accordingly, it is necessary to arrange a plurality of metal structures on the flexible circuit board (1200) so that the radiation pattern of the antenna pattern (1100p) in the 5 GHz band is tilted in the vertical direction.

[0100] The glass substrate module may further include an artificial magnetic conductor (AMC) structure (1310) and a partial reflector surface (PRS) structure (1320) so that the beam direction is tilted by a predetermined angle from the vertical direction. The AMC structure (1310) and the PRS structure (1320) may be referred to as a first metal structure and a second metal structure, respectively. The glass substrate module may further include a reflector (1100R) disposed adjacent to both sides of the antenna pattern (1100p). The reflector (1100R) may be referred to as a third metal structure.

[0101] An AMC structure (1310) may be formed between the second surface of the first glass substrate (1010a) and the first surface of the second glass substrate (1010b). A reflector (1100R) may be formed on the first surface of the first glass substrate (1010a). The reflector (1100R) may be formed in an area facing the AMC structure (1310). A PRS structure (1320) may be formed on the second surface of the second glass substrate (1010b).

[0102] The reflector (1100R) may be configured to include a first reflector (1110R) and a second reflector (1120R). The first reflector (1110R) may be positioned spaced apart from one end of the antenna pattern (1100p). The second reflector (1120R) may be positioned spaced apart from the other end of the antenna pattern (1100p).

[0103] The AMC structure (1310) may be configured to include a first AMC structure (1311) and a second AMC structure (1312). The first AMC structure (1311) may be formed in an area facing the first reflector (1110R). The second AMC structure (1312) may be formed in an area facing the second reflector (1120R).

[0104] Meanwhile, Fig. 10 shows a front view of the AMC structure of a glass substrate module according to the present specification and a perspective view of a glass substrate on which the AMC structure is arranged. Fig. 10(a) shows a front view of the AMC structure of a glass substrate module according to the present specification. Fig. 10(b) shows a perspective view of a glass substrate on which the AMC structure is arranged according to the present specification.

[0105] Referring to FIGS. 8 and 10, a unit cell of an AMC structure (1310) may be placed on a glass substrate module (1000). The unit cell of the AMC structure (1310) may be placed between a first glass substrate (1010a), which is an upper glass substrate, and a second glass substrate (1010b), which is a lower glass substrate. The first glass substrate (1010a) and the second glass substrate (1010b) may be implemented with a first thickness (h1) and a second thickness (h2), respectively, to be implemented as a heterogeneous bonded glass substrate module.

[0106] A unit cell of an AMC structure (1310) may be formed to include a plurality of metal patterns. A unit cell of an AMC structure (1310) may be configured to include a first metal pattern (MP1) and a second metal pattern (MP2). A unit cell of an AMC structure (1310) may be configured to include a first metal pattern (MP1), a second metal pattern (MP2), and a third metal pattern (MP3). Each of the plurality of metal patterns may be formed in a closed loop structure having a polygonal shape. For example, each of the plurality of metal patterns may be formed in a closed loop structure having a square shape.

[0107] The number of the plurality of metal patterns may be determined by considering WiFi frequency bands. The WiFi frequency bands may include a first WiFi frequency band of 2.4-2.45 GHz and a second WiFi frequency band of 5.15-5.8 GHz. The WiFi frequency bands may include a third WiFi frequency band of the 7 GHz band. The shapes of the first metal pattern (MP1) to the third metal pattern (MP3) may be designed to reflect signals incident in the first WiFi frequency band to the third WiFi frequency band.

[0108] The first metal pattern (MP1) may be formed as a closed loop structure in a polygonal shape having an inner length of a first length (L1p) and a first width (W1p). The second metal pattern (MP2) may be arranged to surround the first metal pattern (MP1). The second metal pattern (MP2) may be formed as a closed loop structure in a polygonal shape having an inner length of a second length (L2p) longer than the first length (L1p) and a second width (W2p). The third metal pattern (MP3) may be arranged to surround the second metal pattern (MP2). The third metal pattern (MP3) may be formed as a closed loop structure in a polygonal shape having an inner length of a third length (L3p) longer than the second length (L2p) and a third width (W3p).

[0109] The unit cell of the AMC structure (1310) can be formed with a predetermined length (Lx) in the X-axis direction and a predetermined length (Ly) in the Y-axis direction. The second width (W2p) of the second metal pattern (MP2) can be formed to be narrower than the first width (W1p) of the first metal pattern (MP1). The third width (W3p) of the third metal pattern (MP3) can be formed to be narrower than the second width (W2p) of the second metal pattern (MP2).

[0110] The unit cell of the AMC structure (1310) can be designed so that the phase of the incident signal and the reflected signal have a value within a predetermined range with respect to 0 degrees in WiFi frequency bands. In this regard, FIG. 11 illustrates the phase value of the reflection loss of the AMC structure of the glass substrate module according to the present specification.

[0111] Referring to FIGS. 10 and 11, the phase value (phase(S11)) of the reflection loss (S11) in the first WiFi frequency band of 2.4-2.45 GHz has a value within a predetermined angle range with respect to 0 degrees. In the frequency band of 2.01-2.74 GHz, the phase value is within ±100 degrees with respect to 0 degrees. Therefore, in the first WiFi frequency band of 2.4-2.45 GHz, the AMC structure (1310) reflects a signal with a phase value within a predetermined angle range with respect to 0 degrees.

[0112] In the second WiFi frequency band of 5.15-5.8 GHz, the phase value (phase(S11)) of the reflection loss (S11) has a value within a predetermined angle range with respect to 0 degrees. In the frequency band of 5.11-5.88 GHz, the phase value is within ±100 degrees with respect to 0 degrees. Therefore, in the second WiFi frequency band of 5.15-5.8 GHz, the AMC structure (1310) reflects a signal with a phase value within a predetermined angle range with respect to 0 degrees.

[0113] In the third WiFi frequency band of 7.02-7.08 GHz, the phase value (phase(S11)) of the reflection loss (S11) has a value within a predetermined angle range with respect to 0 degrees. In the frequency band of 7.02-7.08 GHz, the phase value is within ±100 degrees with respect to 0 degrees. Therefore, in the third WiFi frequency band of 7.02-7.08 GHz, the AMC structure (1310) reflects a signal with a phase value within a predetermined angle range with respect to 0 degrees.

[0114] An AMC structure (1310) can be designed so that a reflected signal in the first to third WiFi frequency bands has a phase value within a predetermined angular range based on 0 degrees with respect to an incident signal. To this end, a first length (L1p), which is an inner length of a first metal pattern (MP1), a second length (L2p), which is an inner length of a second metal pattern (MP2), and a third length (L3p), which is an inner length of a third metal pattern (MP3), can be set to 3 mm, 6 mm, and 8.5 mm, respectively. A predetermined length (Lx) in the X-axis direction and a predetermined length (Ly) in the Y-axis direction of the AMC structure (1310) can be set to 9 mm x 9 mm.

[0115] Meanwhile, the PRS structure (1320) may be arranged so as not to overlap with the antenna pattern (1100p) in the Z-axis direction. As another example, some of the PRS structures (1320) may be arranged so as to overlap with the antenna pattern (1100p) in the Z-axis direction. In this regard, FIG. 12 illustrates a front view of a PRS structure arranged non-overlapping or overlapping with an antenna pattern according to an embodiment. FIG. 12(a) illustrates a front view of a PRS structure (1320) arranged non-overlapping with an antenna pattern. FIG. 12(b) illustrates a front view of a PRS structure (1320) arranged overlapping with an antenna pattern. FIG. 13 illustrates a structure in which a flexible circuit board is coupled to the glass substrate module of FIG. 7.

[0116] Fig. 13(a) shows a side view of a glass substrate module (1000) in which a flexible circuit board (1200) is arranged on the front and inside of the glass substrate module (1000). Fig. 13(b) shows a front view of a flexible circuit board (1200) connected to a transparent antenna area (TA).

[0117] Referring to FIGS. 7 and 13, the flexible printed circuit board (1200) may be configured to include a plurality of regions. The flexible printed circuit board (1200) may be formed of a first region (1200R1) positioned between a first glass substrate (1010a) and a second glass substrate (1010b), and a second region (1200R2) positioned outside either the first or second glass substrate (1010a, 1010b). A portion of the first region (1200R1) may be electrically connected to a transparent antenna module (1100). A portion of the second region (1200R2) may be electrically connected to a coaxial cable (610). An antenna pattern (1100p) may be formed in some other areas of the second area (1200R2).

[0118] A flexible circuit board (1200) may be configured to include a first region (1200R1), a second region (1200R2), and a third region (1200R3). The first region (1200R1) may include a bonding region (BA) that is bonded to a transparent antenna region (TA). A power supply pattern (1210f, 1240f) may be formed on the flexible circuit board (1200) to power transparent antennas formed in the transparent antenna region (TA).

[0119] An AMC structure (1310) may be arranged in a first region (1200R1) of a flexible circuit board (1200). An antenna pattern (1100p) and a reflector (1100R) may be arranged in a second region (1200R2) of the flexible circuit board (1200). The reflector (1100R) may be arranged on one side and the other side of the antenna pattern (1100p), respectively. A third region (1200R3) of the flexible circuit board (1200) may be formed such that the flexible circuit board (1200) is bent. The third region (1200R3) may be formed such that the flexible circuit board (1200) is bent along the line AA'. The third region (1200R3) may be formed to surround a side surface of the first glass substrate (1010a).

[0120] The metal pattern formed in the first region (1200R1) of the flexible circuit board (1200) can be implemented as an in-glass structure. The metal pattern formed in the second region (1200R2) of the flexible circuit board (1200) can be implemented as an on-glass structure. The antenna pattern (1100p), which is a WIFI antenna formed in the second region (1200R2) of the flexible circuit board (1200), can implement beam steering by combining with the AMC structure (1310) of the first region (1200R1). The antenna pattern (1100p) can implement beam steering by combining with the reflector (1100p) of the first region (1200R1). The antenna pattern (1100p) can implement beam steering by combining with the PRS pattern (1310) of the second flexible circuit board (1200). The antenna pattern (1100p) can implement beam steering of a WIFI antenna by utilizing metal patterns of a limited area in-glass structure and on-glass structure.

[0121] The limited area of ​​the flexible circuit board (1200) and the second flexible circuit board (1200) can be implemented by a combination of an AMC structure, a meta surface, a reflector, and / or a PRS pattern, etc. Through the limited area of ​​the flexible circuit board (1200) and the second flexible circuit board (1200), it is possible to provide a structure integrated with a WiFi antenna and a 4G / 5G transparent antenna. Meanwhile, signal interference between a WiFi antenna having a structure integrated with a 4G / 5G transparent antenna according to the present specification is reduced, so the design complexity of the WiFi antenna can be reduced. When the signal interference of the WiFi antenna having a structure integrated with a 4G / 5G transparent antenna is above a certain level, the WiFi antenna can be designed independently as the signal interference is reduced.

[0122] A flexible circuit board (1200) may be arranged on the front and inside of a glass substrate module (1000). The PRS structure (1320) formed on the back of the glass substrate module (1000) may be formed as a separate board. An antenna pattern (1100p) and a reflector (1100R) may be arranged on the flexible circuit board (1200) formed on the front of the glass substrate module (1000). An AMC structure (1310) may be arranged on the flexible circuit board (1200) formed on the inside of the glass substrate module (1000). The PRS structure (1320) arranged on the back of the glass substrate module (1000) may be formed as a second flexible circuit board (1200b).

[0123] In this regard, the glass substrate module (1000) may include a first glass substrate (1010a) as an upper glass, a second glass substrate (1010b) as a lower glass, and a film layer (1030) disposed between the first and second glass substrates (1010a, 1010b). The first glass substrate (1010a) and the second glass substrate (1010b) may form a heterogeneous bonded glass structure bonded by the film layer (1030). The film layer (1030) may be formed of a PVB (Polyvinyl butyral) layer, but is not limited thereto and may be changed depending on the application.

[0124] An AMC structure (1310) may be formed between first and second glass substrates (1010a, 1010b). An antenna pattern (1100) and a reflector (1100R) operating in WiFi frequency bands may be formed on a first surface of the first glass substrate (1010a). A PRS structure (1320) may be formed on a second surface of the second glass substrate (1010b). The AMC structure (1310) between the first and second glass substrates (1010a, 1010b) and the PRS structure (1320) on the second surface of the second glass substrate (1010b) may be referred to as a first metal structure and a second metal structure, respectively. The first metal structure is not limited to the AMC structure (1310) and may be implemented as a meta surface or a PRS structure depending on the application. The second metal structure is not limited to the PRS structure (1320), and may be implemented as an AMC structure or meta surface depending on the application.

[0125] Meanwhile, the glass substrate module (1000) according to the present specification may be configured to include a transparent antenna having a metal mesh structure and a metal pattern formed in an opaque area. In this regard, FIG. 14 illustrates a front view of a glass substrate module having the AMC structure of FIG. 10. FIG. 15 illustrates a perspective view of a glass substrate module having the PRS structure of FIG. 12(a).

[0126] Referring to FIGS. 7, 8, 13 to 15, the width of the area where metal structures can be placed to improve the isolation between the transparent antenna module (1100) and the antenna pattern (1100p) and to optimize the beam pattern in the flexible printed circuit board (1200) is limited. In this regard, the width (W) in the X-axis direction of the area where metal structures can be placed in the flexible printed circuit board (1200) WiFi) may be limited within a predetermined range based on about 50 mm. The length in the Y-axis direction of the area where the metal structures can be arranged in the flexible printed circuit board (1200) may be limited within a predetermined range based on about 20 mm. In this regard, the area of ​​the limited flexible printed circuit board (1200) of about 50 mm x 20 mm has a value smaller than 62.5 mm, which is 0.5 wavelength, based on the lowest frequency of 2.4 GHz. Therefore, at least some of the first to third metal structures should be arranged in the area of ​​the limited flexible printed circuit board (1200) of about 50 mm x 20 mm to improve isolation and optimize the beam pattern.

[0127] A reflector (1100R) may be disposed on a first surface of a first glass substrate (1010a). A reflector (1100R) may be disposed on a first surface of a flexible circuit board (1200). The reflector (1100R) may be configured to reflect a lateral signal radiated from an antenna pattern (1100p) implemented as a slot antenna. An AMC structure (1310) may be disposed between the first and second glass substrates (1010a, 1010b). The AMC structure (1310) may be disposed on a second surface of the flexible circuit board (1200). A PRS structure (1320) may be disposed on a second surface of the second glass substrate (1010b). The PRS structure (1320) may be disposed on the second flexible circuit board (1200b).

[0128] Referring to FIGS. 8 and 13 to 15, a PRS structure (1320) arranged to be non-overlapping or overlapping with an antenna pattern (1110p) and a glass substrate module (1000) including the same will be described. The antenna pattern (1100p) may be arranged in an area having a first width (W1x) in the X-axis direction and a first length (L1y) in the Y-axis direction. The PRS structure (1320) may include a plurality of PRS patterns. The plurality of PRS patterns may be arranged to be spaced apart in parallel in the X-axis direction within an area having a second width (W2x) in the X-axis direction and a second length (L2y) in the Y-axis direction. The second width (W2x) may be formed to be wider than the first width (W1x). The second length (L2y) may be formed to be longer than or equal to the first length (L1y).

[0129] The plurality of PRS patterns may be configured to include first PRS patterns (1320a) and second PRS patterns (1320b). The first PRS patterns (1320a) may be arranged in a first region, spaced apart from one end of the antenna pattern (1100p). The second PRS patterns (1320b) may be arranged in a second region, spaced apart from the other end of the antenna pattern (1100p). The width of each of the first PRS patterns (1320a) may be formed as a third width (W3x). The length of each of the first PRS patterns (1320a) may be formed as a second length (L2y). The spacing between adjacent first PRS patterns (1320a) may be formed as first and second spacings (Ga1, Ga2). The width of each of the second PRS patterns (1320b) may be formed as a third width (W3x). The length of each of the second PRS patterns (1320b) may be formed as a second length (L2y). The spacing between adjacent second PRS patterns (1320b) may be formed as fourth and fifth spacings (Ga4, Ga5).

[0130] A plurality of PRS patterns may be configured such that some of the PRS structures (1320) overlap with the antenna pattern (1100p) in the Z-axis direction. In this regard, the plurality of PRS patterns may further include a third PRS pattern (1320c). The third PRS pattern (1320c) may be formed in a third region opposite to the region where the antenna pattern (1100p) is arranged. The center of the third PRS pattern (1320c) and the center of the antenna pattern (1100p) may be arranged at the same point.

[0131] The first PRS patterns (1320a) may include first to third sub-patterns (SP1, SP2, SP3) arranged in a direction away from the antenna pattern (1100p). The second PRS patterns (1320b) may include fourth to sixth sub-patterns (SP4, SP5, SP6) arranged in a direction away from the antenna pattern (1100p). The third PRS pattern (1320c) may correspond to the seventh sub-pattern (SP7).

[0132] The first gap (Ga1) between the first sub-pattern (SP1) and the second sub-pattern (SP2) may be formed to be larger than the second gap (Ga2) between the second sub-pattern (SP2) and the third sub-pattern (SP3). The fourth gap (Ga4) between the fourth sub-pattern (SP4) and the fifth sub-pattern (SP5) may be formed to be larger than the fifth gap (Ga5) between the fifth sub-pattern (SP5) and the sixth sub-pattern (SP6). The first gap (Ga1) and the fourth gap (Ga4) may be formed to be the same distance. The second gap (Ga2) and the fifth gap (Ga5) may be formed to be the same distance.

[0133] The third gap (Ga3) between the first sub-pattern (SP1) and the antenna pattern (1100p) may be formed to be smaller than the first gap (Ga1) and larger than the second gap (Ga2). The sixth gap (Ga6) between the fourth sub-pattern (SP4) and the antenna pattern (1100) may be formed to be smaller than the fourth gap (Ga4) and larger than the fifth gap (Ga5). The third gap (Ga3) and the sixth gap (Ga6) may be formed to be the same distance.

[0134] Meanwhile, the AMC structure (1310) of the glass substrate module (1000) according to the present specification may be configured to reflect a signal and the PRS structure (1320) to adjust the phase during reflection and transmission of the signal. In this regard, the PRS structure (1320) is formed to reflect a portion of the signal radiated from the antenna pattern (1100p) and transmit the remainder of the signal. The transmission angle of the signal transmitting through the PRS structure (1320) is formed at a different angle from the incident angle of the signal. The direction of the wavefront of the signal transmitting through the PRS structure (1320) may be steered by the transmission angle of the signal transmitting through the PRS structure (1320). The AMC structure (1310) is formed to reflect a signal reflected and incident on the PRS structure (1320) so that the signal is incident on the PRS structure (1320).

[0135] By adjusting the phase of the signal passing through each of the plurality of PRS patterns constituting the PRS structure (1320), the wavefront of the signal passing through the PRS structure (1320) can be steered as in the following mathematical expression 1.

[0136]

[0137] In this regard, m is the number of sub-patterns of the PRS structure (1320), and can be set to, for example, m=7, but is not limited thereto and can be changed depending on the application. The phase of the signal reflected from the ith sub-pattern of the PRS structure (1320) is Γ icorresponds to . The phase of the signal reflected from the i-th sub-pattern of the PRS structure (1320), incident on the AMC structure (1310), and reflected again from the AMC structure (1310) is Φ i corresponds to . The phase of the (k+1)th signal of the PRS structure (1320) is T k+1 corresponds to the distance between the Kth AMC structure (1310) and the PRS structure (1320) is p k The electrical length of the signal radiated from the antenna pattern (1110) and passing through the PRS structure (1320) corresponds to l.

[0138] Accordingly, the direction of the wavefront of the transmission signal can be controlled by controlling the phase of the transmission signal passing through the first to seventh sub-patterns (SP1 to SP7) of the PRS structure (1320).

[0139] The AMC structure (1310) can reflect a signal incident in a WiFi frequency band so that the signal has a phase within a predetermined angular range based on 0 degrees. The AMC structure (1310) can be configured to include a first AMC structure (1311) arranged on one side of the antenna pattern (1100p) and a second AMC structure (1312) arranged on the other side. The first AMC structure (1311) can be configured such that a plurality of unit cells are arranged in the X-axis direction by N numbers and in the Y-axis direction by M numbers. The second AMC structure (1312) can be configured such that a plurality of unit cells are arranged in the X-axis direction by N numbers and in the Y-axis direction by M numbers.

[0140] Meanwhile, the glass substrate module (1000) according to the present specification may include an antenna pattern (1100p) operating in WiFi frequency bands and a transparent antenna module (1100). The antenna pattern (1100p) may be formed on a first surface of a first glass substrate (1010a). The transparent antenna module (1100) may be disposed between the first glass substrate (1010a) and the second glass substrate (1010b). The transparent antenna module (1100) may include a first antenna pattern portion (1100-1) and a second antenna pattern portion (1100-2). The antenna pattern (1100p) may be disposed between the first antenna pattern portion (1100-1) and the second antenna pattern portion (1100-2).

[0141] A glass substrate module (1000) according to the present specification may further include a control unit (1400) and a connection unit (1000CL). The control unit (1400) may be configured to control a transparent antenna module (1100). The connection unit (1000CL) may be configured to electrically connect the transparent antenna module (1100) and the control unit (1400). The connection unit (1000CL) may comprise a flexible printed circuit board (FPCB) (1200) and a coaxial cable (610). The transparent antenna module (1100) may include a first antenna pattern unit (1100-1) and a second antenna pattern unit (1100-2).

[0142] The flexible printed circuit board (1200) may be formed of a first region (1200R1) positioned between a first glass substrate (1010a) and a second glass substrate (1010b), and a second region (1200R2) positioned outside either the first or second glass substrate (1010a, 1010b). A portion of the first region (1200R1) may be electrically connected to a transparent antenna module (1100). A portion of the second region (1200R2) may be electrically connected to a coaxial cable (610). An antenna pattern (1100p) may be formed in another portion of the second region (1200R2).

[0143] Meanwhile, in the glass substrate module according to the present specification, the antenna pattern (1100p) can steer the beam by the reflector (1100R), the AMC structure (1310), and the PRS structure (1320). In this regard, the beam steering method by each of the reflector (1100R), the AMC structure (1310), and the PRS structure (1320) will be described in detail with reference to the drawings.

[0144] In this regard, FIGS. 16A and 16B illustrate perspective views of a glass substrate module according to the present specification in which reflectors are arranged adjacent to an antenna pattern. FIG. 16A illustrates a structure in which a reflector (1100R) is arranged adjacent to an area in which an antenna pattern (1110p) is arranged. FIG. 16B illustrates a structure in which a reflector (1100R) is arranged adjacent to an area in which an antenna pattern (1110p) is arranged and a matching circuit is arranged between the reflector (1100R) and a metal frame area (MFR). A matching circuit area (MCR) in which a matching circuit is arranged between the reflector (1100R) and the metal frame area (MFR) may be formed. FIG. 17 is an enlarged view of a flexible circuit board in which reflectors are formed on one side and the other side of an antenna pattern.

[0145] Referring to FIGS. 13 to 17, reflectors (1110R, 1120R) may be arranged on one side and the other side of the third antenna pattern portion (1100-3) on which the antenna pattern (1100p) is formed. The reflectors (1110R, 1120R) may be formed as a metal pattern for beam steering by utilizing the reflection of a leaky wave radiated from the antenna pattern (1100p). The reflectors (1110R, 1120R) may be arranged on one side of the antenna pattern (1100p) as a film antenna on a flexible circuit board (1200) so as to enable integration with a transparent antenna area (TA). The reflectors (1110R, 1120R) may be formed as a metal pattern having a predetermined length and width.

[0146] The reflector (1110R, 1120R) may be implemented as an AMC structure having a plurality of closed-loop metal patterns, a PRS structure having a plurality of parallel metal patterns, or a meta surface having an arbitrary shape. Accordingly, the reflector (1110R, 1120R) that may be implemented as an AMC structure, a PRS structure, or a meta surface may be referred to as a third metal structure.

[0147] The third metal structure may be arranged on one side, the other side, or both sides of the one side and the other side of the antenna pattern (1100p) that performs beam steering. The spacing (α) between the third metal structure and the antenna pattern (1100p) may be set to be 0.03 times or more of the target wavelength corresponding to the target resonant frequency. The spacing (α) between the reflector (1100R) and the third antenna pattern portion on which the antenna pattern (1100p) is formed may be set to be 0.03 times or more of the wavelength corresponding to the lowest operating frequency of the WiFi frequency band.

[0148] A first region (1200R1) of a flexible circuit board (1200) may be disposed between first and second glass substrates (1010a, 1010b). A second region (1200R2) of the flexible circuit board (1200) may be disposed on a first surface of the first glass substrate (1010a). A third region (1200R3) of the flexible circuit board (1200) may be disposed on a side surface of the first glass substrate (1010a). A matching circuit (MC1, MC2) may be disposed between a ground region (1100g) formed in the third region (1200R3) of the flexible circuit board (1200) and a reflector (1100R). The phase of the reflected signal radiated through the antenna pattern (1100p) and reflected through the reflector (1110R, 1120R) can be tuned through a matching circuit.

[0149] A first matching circuit (MC1) may be arranged between an end of a third region (1200R3) of a flexible circuit board (1200) and an end of a first reflector (1110R). A second matching circuit (MC2) may be arranged between an end of a third region (1200R3) of a flexible circuit board (1200) and an end of a second reflector (1120R). The first and second matching circuits (MC1, MC2) may be implemented as a passive circuit of an inductor (L) and a capacitor (C) and / or an active circuit such as a diode (D) whose characteristics are changed by a control voltage.

[0150] For example, the first matching circuit (MC1) may be implemented with a first capacitor having a first capacitance (C1). The second matching circuit (MC2) may be implemented with a second capacitor having a second capacitance (C2). The first capacitance (C1) and the second capacitance (C2) may be set to 180 pF and 150 uF, respectively, but are not limited thereto and may be changed depending on the application.

[0151] Meanwhile, a beam steering method is described in a structure in which an AMC structure (1310) is arranged on a different layer from the antenna pattern in a glass substrate module according to the present specification. In this regard, FIG. 18 is a perspective view showing AMC structures arranged adjacent to a different layer from the antenna pattern in a glass substrate module according to the present specification. FIG. 19 is an enlarged view of a flexible circuit board in which an AMC structure is arranged adjacent to a feed pattern and a reflector is formed on one side and the other side of the antenna pattern.

[0152] Referring to FIGS. 7, 8, 13 to 15, 18, and 19, a pattern structure for beam steering of an antenna pattern (1100p) may be formed using reflection of a leaky wave. An AMC structure (1310) may be formed adjacent to an antenna connection portion (1210, 1220) in which a feeding pattern (1210f, 1240f) is formed. A reflector (1100R) may be formed on one side and the other side of the antenna pattern (1100p) adjacent to the antenna pattern (1100p). A matching circuit (MC1, MC2) may be arranged at an end of the reflector (1100R).

[0153] The AMC structure (1310) arranged on the flexible circuit board (1200) for power supply of the transparent antenna area (TA) may be referred to as a first metal structure. The first metal structure is not limited to the AMC structure (1310), and may be changed to a PRS structure, a reflector, or a meta surface structure depending on the application.

[0154] The size of the unit cell of the first metal structure implemented as an AMC structure (1310), a PRS structure, a reflector, or a meta surface structure can be formed so as to be able to operate in a WiFi frequency band in double-laminated glass. The WiFi frequency band can be set to include 2.4-2.5 GHz, 5.15-5.85 GHz. The WiFi frequency band can be set to further include a 7 GH band. The size of the unit cell of the AMC structure (1310) can be set to β x γ mm. The size of the AMC structure (1310) arranged in N in the X-axis direction and in M ​​in the Y-axis direction can be set to Nβ X Mγ mm.

[0155] The area where the AMC structure (1310) can be formed can be determined by considering the minimum separation distance from the antenna pattern (1100p) and the minimum separation distance from the antenna connection portion (1210, 1220) where the feed pattern (1210f, 1240f) is formed. The length and width of the area where the AMC structure (1310) can be formed can be limited to Sx and Sy in the X-axis and Y-axis directions. Therefore, the number (N, M) of unit cells that can be arranged in the AMC structure (1310) is Nβ. <Sx, Mγ<Sy를 만족하는 최대 정수로 정의될 수 결정될 수 있다. Sx는 빔 조향을 하는 안테나 패턴(1100p)의 일 측 단부 또는 타 측 단부에서 투명 안테나 영역(TA)으로 급전하는 급전 패턴이 형성된 안테나 연결부(1210, 1220)까지의 길이로 정의될 수 있다. Sy는 투명 안테나 영역(TA)으로 급전하는 필름에서 메탈 프레임 영역(MFR)까지의 길이로 정의될 수 있다.

[0156] Meanwhile, a beam steering method is described in a structure in which a PRS structure is arranged on a different layer from the antenna pattern in a glass substrate module according to the present specification. In this regard, FIG. 20 shows a perspective view in which a PRS structure is arranged on a different layer from the antenna pattern in a glass substrate module according to the present specification. Referring to FIGS. 12 and 20, the PRS structure (1320) may be formed in a non-overlapping structure or an overlapping structure with the antenna pattern (1100p).

[0157] Referring to FIGS. 7, 12, and 20, a PRS structure (1320) may be placed on a second glass substrate (1010b) to control the wavefront of a signal radiated by an antenna pattern (1100p). The second metal structure that may be placed on the second surface of the second glass substrate (1010b) is not limited to the PRS structure (1320), but may also be changed to a reflector, an AMC structure, or a metasurface structure.

[0158] The length (Tx) of the PRS structure (1320) is formed to be smaller than the distance between the antenna connection portions (1210, 1220) where the feed patterns (1210f, 1240f) are formed. The length (Tx) of the PRS structure (1320) is determined by the sum of the width (W2x) of the antenna pattern (1100p) for beam steering and the widths of the regions where the sub-patterns (SP1 to SP6) are arranged. The number, width, and separation distance of the sub-patterns (SP1 to SP6) can be determined to enable wavefront control at a desired angle according to phase conversion for reflection and transmission of leaked radio waves. The width (Ty) of the PRS structure (1320) can be determined to be smaller than or equal to the width (Sy) of the region where the AMC structure (1310) of FIG. 17 can be formed.

[0159] Meanwhile, in the glass substrate module according to the present specification, the AMC structure arranged on a different layer from the antenna pattern is formed only on one side of the antenna pattern, so that the antenna beam can be tilted in one direction. In this regard, Fig. 21 shows a front view of a glass substrate module in which the AMC structure is formed only on one side of the antenna pattern. Fig. 22 shows radiation patterns depending on the presence or absence of the AMC structure.

[0160] Referring to FIG. 21, an AMC structure (1311) may be arranged on only one side of the antenna pattern (1100p) to steer the beam in one direction of a signal radiated from the antenna pattern (1100p). Referring to FIG. 14 and FIG. 21, an AMC structure (1311) may be arranged on only one side of the antenna pattern (1100p), or an AMC structure (1312) may be arranged on only the other side of the antenna pattern (1100p).

[0161] Referring to FIGS. 8, 13, 14, and 21, the glass substrate module (1000) may include a reflector (1100R), an AMC structure (1311), and a PRS structure (1320). An antenna pattern (1100p) and a reflector (1100R) may be disposed on a first surface of a first glass substrate (1010a). A reflector (1100R) may be disposed on a second surface of a second glass substrate (1010b). An AMC structure (1311) may be disposed on a film layer (1030) between the first and second glass substrates (1010a, 1010b). The film layer (1030) may be formed of a PVB layer, but is not limited thereto and may be changed depending on the application. An AMC structure (1311) may be placed on only one side of the antenna pattern (1100p).

[0162] Fig. 22(a) compares radiation patterns with and without an AMC structure at 5.3 GHz. Compared to the radiation pattern (Rp1) of the first structure without an AMC structure, the beam peak of the radiation pattern (Rp2) of the second structure, in which the AMC structure is arranged on only one side, is tilted in one direction by a predetermined angle. For example, compared to the beam peak of the radiation pattern (Rp1) of the first structure, the beam peak of the radiation pattern (Rp2) of the second structure may be tilted in one direction by about 30 degrees.

[0163] Fig. 22(b) compares radiation patterns with and without an AMC structure at 5.7 GHz. Compared to the radiation pattern (Rp1) of the first structure without an AMC structure, the beam peak of the radiation pattern (Rp2) of the second structure, in which the AMC structure is arranged on only one side, is tilted in one direction by a predetermined angle. For example, compared to the beam peak of the radiation pattern (Rp1) of the first structure, the beam peak of the radiation pattern (Rp2) of the second structure may be tilted in one direction by about 30 degrees.

[0164] Meanwhile, in the glass substrate module according to the present specification, the AMC structure disposed on a different layer from the antenna pattern may be formed on both sides of the antenna pattern to prevent the inflow of interference signals from a specific direction. Referring to FIG. 14, PRS structures (1311, 1312) may be formed on one side and the other side of the antenna pattern (1100p). As the PRS structures (1311, 1312) are formed on one side and the other side of the antenna pattern (1100p), the occurrence of ripples in the main lobe may be suppressed and the level of the side lobe may be reduced. In this regard, FIG. 23 compares radiation patterns according to the presence or absence of the AMC structure in the WiFi frequency band.

[0165] Figure 23(a) compares radiation patterns at 5.3 GHz with and without an AMC structure. The radiation pattern (Rp1) of the first structure without an AMC structure has ripples in the main lobe pattern formed in the front direction, which may cause variations in the signal level received in the front direction depending on the direction. The radiation pattern (Rp3) of the third structure with AMC structures arranged on both sides has no ripples in the main lobe pattern, so there is no variation in the signal level received in the front direction depending on the direction.

[0166] Compared to the radiation pattern (Rp1) of the first structure without the AMC structure, the level of the radiation pattern (Rp3) of the third structure with the AMC structures arranged on both sides is reduced in the horizontal axis direction, thereby reducing the side lobe level. For example, the level of the horizontal axis direction of the radiation pattern (Rp3) of the third structure may be reduced by 10 dB or more compared to the level of the horizontal axis direction of the radiation pattern (Rp1) of the first structure.

[0167] Fig. 23(b) compares radiation patterns at 5.7 GHz with and without an AMC structure. The radiation pattern (Rp1) of the first structure without an AMC structure has ripples in the main lobe pattern formed in the forward direction, which may cause variations in the signal level received in the forward direction depending on the direction. The radiation pattern (Rp3) of the third structure with AMC structures arranged on both sides has no ripples in the main lobe pattern, so there is no variation in the signal level received in the forward direction depending on the direction.

[0168] Compared to the radiation pattern (Rp1) of the first structure without the AMC structure, the level of the radiation pattern (Rp3) of the third structure in which the AMC structures are arranged on both sides is reduced in the horizontal axis direction, thereby reducing the side lobe level. For example, the level of the radiation pattern (Rp3) of the third structure in the horizontal axis direction can be reduced by 10 dB or more compared to the level of the radiation pattern (Rp1) of the first structure in the horizontal axis direction. In addition, the radiation pattern (Rp3) of the third structure can reduce unwanted radiation in the rear direction as a null is formed in the rear direction.

[0169] The above describes a glass substrate module according to one aspect of the present specification. Below, a flexible printed circuit board comprising multiple layers according to another aspect of the present specification will be described. The flexible printed circuit board comprising multiple layers will be described with reference to FIGS. 7 to 21. In this regard, all descriptions of the aforementioned glass substrate module can be applied to the following flexible printed circuit board.

[0170] A flexible printed circuit board (1200) may be configured to include a first antenna connection portion (1210), a second antenna connection portion (1220), an antenna pattern (1110p), and a plurality of metal structures. The plurality of metal structures of the flexible printed circuit board (1200) may include a first metal structure (1310) and a second metal structure (1320). The plurality of metal structures of the flexible printed circuit board (1200) may further include a third metal structure (1100R).

[0171] The first antenna connection portion (1210) and the second antenna connection portion (1220) may be formed on a transparent substrate positioned between a first glass substrate (1010a) and a second glass substrate (1010b). The antenna pattern (1110p) may be formed on a first surface of the first glass substrate (1010a). The antenna pattern (1110p) may be configured to radiate signals in multiple WiFi frequency bands. The first metal structure (1310) may be formed between the second surface of the first glass substrate (1010a) and the first surface of the second glass substrate (1010b). The second metal structure (1320) may be formed on the second surface of the second glass substrate (1010b). The second metal structure (1320) may be disposed on a separate second flexible printed circuit board (1200b). The third metal structure (1100R) may be formed on the first surface of the first glass substrate (1010a). The third metal structure (1100R) may be formed in an area facing the first metal structure (1310).

[0172] The first metal structure (1310) may be configured to reflect a signal, and the second metal structure (1320) may be configured to adjust the phase during reflection and transmission of the signal. In this regard, the second metal structure (1320) is formed to reflect a portion of the signal radiated from the antenna pattern (1100p) and transmit the remainder of the signal. The transmission angle of the signal transmitting through the second metal structure (1320) is formed at a different angle from the incident angle of the signal. The direction of the wavefront of the signal transmitting through the second metal structure (1320) may be steered by the transmission angle of the signal transmitting through the second metal structure (1320). The first metal structure (1310) is formed to reflect a signal reflected and incident on the second metal structure (1320) so that the signal is incident on the second metal structure (1320).

[0173] The first metal structure (1310) may be formed as an AMC structure. The first metal structure (1310) may include a first AMC structure (1311) and a second AMC structure (1312). The first AMC structure (1311) may be formed in an area facing the first reflector (1110R). The second AMC structure (1312) may be formed in an area facing the second reflector (1120R).

[0174] A unit cell of the first metal structure (1310) may include a plurality of metal patterns to cover a plurality of WiFi frequency bands. The unit cell of the first metal structure (1310) may include a first metal pattern (MP1) to a third metal pattern (MP3). The first metal pattern (MP1) may be formed as a closed loop structure in a polygonal shape having an inner length of a first length (L1p) and a first width (W1p). The second metal pattern (MP2) may be arranged to surround the first metal pattern (MP1). The second metal pattern (MP2) may be formed as a closed loop structure in a polygonal shape having an inner length of a second length (L2p) longer than the first length (L1p) and a second width (W2p). The third metal pattern (MP3) may be arranged to surround the second metal pattern (MP2). The third metal pattern (MP3) may be formed as a closed loop structure in the shape of a polygon with a third length (L3p) that is longer than the second length (L2p) and a third width (W3p). The first metal structure (1310) may be configured such that a plurality of unit cells are arranged N in the X-axis direction and M in the Y-axis direction.

[0175] The antenna pattern (1110p) may be arranged in an area having a first width (W1x) in the X-axis direction and a first length (L1y) in the Y-axis direction. The second metal structure (1320) may be formed as a PRS structure. The second metal structure (1320) may include a plurality of PRS patterns. The second metal structure (1320) may include a plurality of PRS patterns that are arranged to be spaced apart in parallel in the X-axis direction within an area having a second width (W2x) in the X-axis direction and a second length (L2y) in the Y-axis direction. The second width (W2x) may be formed to be wider than the first width (W1x). The second length (L2y) may be formed to be longer than or equal to the first length (L1y).

[0176] The plurality of PRS patterns may include first PRS patterns (1320a) arranged spaced apart from one end of the antenna pattern (1110p) and second PRS patterns (1320b) arranged spaced apart from the other end of the antenna pattern (1110p). The plurality of PRS patterns may further include third PRS patterns (1320c) formed in a third region opposite to the region where the antenna pattern (1100p) is arranged. The center of the third PRS pattern (1320c) and the center of the antenna pattern (1100p) may be arranged at the same point.

[0177] The above describes a glass substrate module that can be placed on a vehicle window and a flexible printed circuit board comprising multiple layers. The technical advantages of the glass substrate module and the flexible printed circuit board comprising multiple layers that can be placed on a vehicle window are as follows.

[0178] The technical effects of a glass substrate module including a transparent antenna in a vehicle glass and a flexible circuit substrate including multiple layers are described as follows.

[0179] According to this specification, when an antenna module is placed on a vehicle window, metal structures can be placed adjacent to the antenna element to optimally change the beam pattern and improve communication performance.

[0180] According to the present specification, when an antenna module is placed on a vehicle window, the direction of the beam pattern of the antenna element can be changed in the horizontal direction by placing metal structures adjacent to the antenna element.

[0181] According to this specification, a film material antenna can be implemented in an on-glass structure and communication performance can be improved by reducing feed loss through slot-coupled feed.

[0182] According to the present specification, in a glass substrate module including a transparent antenna of a vehicle glass, a film material antenna and a plurality of metal structures are formed on a flexible circuit board, thereby reducing interference between the plurality of antennas.

[0183] According to the present specification, by forming a film material antenna and a plurality of metal structures on a flexible circuit board, distortion of a beam shape due to interference between the film material antenna and a transparent electrode forming a transparent antenna can be prevented.

[0184] Further scope of the applicability of this disclosure will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of this disclosure will be readily apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as the preferred embodiments of this disclosure, are given by way of example only. The scope of this disclosure should be determined by a reasonable interpretation of the appended claims, and all changes within the equivalent scope of this disclosure are intended to be embraced therein.

Claims

1. In the glass substrate module, First glass substrate; A second glass substrate formed by laminating the first glass substrate; An antenna pattern formed on the first surface of the first glass substrate; An AMC (artificial magnetic conductor) structure formed between the second surface of the first glass substrate and the first surface of the second glass substrate; A reflector formed on the first surface of the first glass substrate and formed in an area facing the AMC structure; and A glass substrate module comprising a PRS (partial reflector surface) structure formed on a second surface of the second glass substrate.

2. In paragraph 1, The above PRS structure is formed so that a portion of the signal radiated from the antenna pattern is reflected and the remainder of the signal is transmitted, The transmission angle of the signal penetrating the PRS structure is formed at a different angle from the incident angle of the signal, so that the direction of the wavefront of the signal penetrating the PRS structure is steered by the transmission angle. A glass substrate module in which the above AMC structure is formed to reflect a signal reflected from the above PRS structure and cause the signal to be incident on the above PRS structure.

3. In paragraph 1, The above reflector is, A first reflector arranged spaced apart from one end of the antenna pattern; and A glass substrate module comprising a second reflector arranged spaced apart from the other end of the antenna pattern.

4. In paragraph 1, A glass substrate module, wherein the gap between the reflector and the third antenna pattern portion on which the antenna pattern is formed is set to be 0.03 times or more of the wavelength corresponding to the lowest operating frequency of the WiFi frequency band.

5. In paragraph 3, The above AMC structure is, A first AMC structure formed in an area facing the first reflector; and A glass substrate module comprising a second AMC structure formed in an area facing the second reflector.

6. In paragraph 1, The unit cell of the above AMC structure is A first metal pattern having an inner length of a first length and a first width; A second metal pattern arranged to surround the first metal pattern, formed with a second length longer than the first length and having a second width; and A glass substrate module comprising a third metal pattern arranged to surround the second metal pattern, the third metal pattern having a third length longer than the second length and a third width.

7. In paragraph 6, The second width is formed narrower than the first width, and the third width is formed narrower than the second width. The above AMC structure is a glass substrate module in which a plurality of unit cells are arranged N in the X-axis direction and M in the Y-axis direction.

8. In paragraph 5, The above antenna pattern is arranged in an area having a first width in the X-axis direction and a first length in the Y-axis direction, The PRS structure includes a plurality of PRS patterns spaced apart in parallel in the X-axis direction within a region having the second width in the X-axis direction and the first length in the Y-axis direction, A glass substrate module, wherein the plurality of PRS patterns include first PRS patterns arranged spaced apart from one end of the antenna pattern and second PRS patterns arranged spaced apart from the other end of the antenna pattern.

9. In paragraph 8, The above multiple PRS patterns are Further comprising a third PRS pattern formed in a third area opposite to the area where the above antenna pattern is arranged, A glass substrate module in which the center of the third PRS pattern and the center of the antenna pattern are positioned at the same point.

10. In paragraph 8, The above first PRS patterns include first to third sub-patterns arranged in a direction away from the antenna pattern, The above second PRS patterns include fourth to sixth sub-patterns arranged in a direction away from the antenna pattern, The first gap between the first sub-pattern and the second sub-pattern is formed to be larger than the second gap between the second sub-pattern and the third sub-pattern, A glass substrate module, wherein the fourth gap between the fourth sub-pattern and the fifth sub-pattern is formed to be larger than the fifth gap between the fifth sub-pattern and the sixth sub-pattern.

11. In paragraph 10, The third interval between the first sub-pattern and the antenna pattern is formed to be smaller than the first interval and larger than the second interval, A glass substrate module, wherein the sixth gap between the fourth sub-pattern and the antenna pattern is formed to be smaller than the fourth gap and larger than the fifth gap.

12. In paragraph 1, Further comprising a transparent antenna module disposed between the first glass substrate and the second glass substrate, The above transparent antenna module has a first antenna pattern portion and a second antenna pattern portion, A glass substrate module, wherein the antenna pattern is disposed between the first antenna pattern portion and the second antenna pattern portion.

13. In paragraph 12, A control unit for controlling the above transparent antenna module; and Further comprising a connecting portion electrically connecting the transparent antenna and the control portion, The above connecting part comprises a flexible printed circuit board and coaxial cables, The above flexible printed circuit board is formed with a first region positioned between the first glass substrate and the second glass substrate and a second region positioned outside of either the first or second glass substrate, The first region is electrically connected in some areas to the transparent antenna module, Some areas of the above second area are electrically connected to the coaxial cable, A glass substrate module in which the antenna pattern is formed in another part of the second region.

14. In a flexible printed circuit board composed of multiple layers, A first antenna connection portion and a second antenna connection portion formed on a transparent substrate positioned between a first glass substrate and a second glass substrate and connected to a first antenna pattern portion and a second antenna pattern portion; An antenna pattern formed on the first surface of the first glass substrate; A first metal structure formed between the second surface of the first glass substrate and the first surface of the second glass substrate; A second metal structure formed on the second surface of the second glass substrate; and A flexible printed circuit board comprising a third metal structure formed on a first surface of the first glass substrate and formed in an area facing the first metal structure.

15. In paragraph 14, The second metal structure is formed to reflect a portion of the signal radiated from the antenna pattern and transmit the remainder of the signal, The transmission angle of the signal penetrating the second metal structure is formed at a different angle from the incident angle of the signal, so that the direction of the wavefront of the signal penetrating the PRS structure is steered by the transmission angle. A flexible printed circuit board, wherein the first metal structure is formed to reflect an incident signal reflected from the second metal structure so that the signal is incident on the second metal structure.

16. In paragraph 14, The above third metal structure is, A first reflector arranged spaced apart from one end of the antenna pattern; and A flexible printed circuit board including a second reflector arranged spaced apart from the other end of the antenna pattern.

17. In paragraph 16, The above first metal structure is, A first AMC structure formed in an area facing the first reflector; and A flexible printed circuit board comprising a second AMC structure formed in an area facing the second reflector.

18. In paragraph 14, The above antenna pattern is arranged in an area having a first width in the X-axis direction and a first length in the Y-axis direction, The second metal structure includes a plurality of PRS patterns spaced apart in parallel in the X-axis direction within a region having the second width in the X-axis direction and the first length in the Y-axis direction, A flexible printed circuit board, wherein the plurality of PRS patterns include first PRS patterns arranged spaced apart from one end of the antenna pattern and second PRS patterns arranged spaced apart from the other end of the antenna pattern.

19. In paragraph 18, The above multiple PRS patterns are Further comprising a third PRS pattern formed in a third area opposite to the area where the above antenna pattern is arranged, A flexible printed circuit board, wherein the center of the third PRS pattern and the center of the antenna pattern are positioned at the same point.

20. In paragraph 14, The unit cell of the above first metal structure is, A first metal pattern having an inner length of a first length and a first width; A second metal pattern arranged to surround the first metal pattern, formed with a second length longer than the first length and having a second width; and A third metal pattern is disposed to surround the second metal pattern, and has a third length longer than the second length and a third width. The above first metal structure is a flexible printed circuit board in which a plurality of unit cells are arranged N in the X-axis direction and M in the Y-axis direction.

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