KR20240009292A - Communication Device - Google Patents

Abstract

A communication device according to an embodiment of the present invention includes an NFC module that transmits and receives signals with Electric Vehicle Supply Equipment (EVSE), Electric Vehicle Communication Controller (EVCC), and a mobile terminal; and a control module that transmits a control signal to the EVSE and EVCC using a signal received from the mobile terminal.

Description

Communication Device

The present invention relates to a communication device, and more specifically, to a communication device that improves communication performance through efficient antenna placement.

Eco-friendly vehicles such as electric vehicles (EV) or plug-in hybrid electric vehicles (PHEV) use electric vehicle supply equipment (EVSE) installed at charging stations to charge their batteries. .

Several protocols are being actively developed for interaction between electric vehicles and EVSE. Protocols for electric vehicle charging can be broadly classified into charging systems, charging interfaces, and communication protocols.

However, since different regulations are adopted by country or automobile company, electric vehicle charging devices, battery packs, and battery management systems (BMS) must be developed and designed according to regulations.

When designing a vehicle charging system to charge an electric vehicle, there is a problem in that if power lines for slow charging, fast charging, and communication supply as well as communication lines for communication progress are included, the wires become thicker and the cost increases. Additionally, there is a problem that kiosks must be installed around parking spaces to charge electric vehicles, and charging can only be done at the location where the kiosk is installed. Additionally, there is a disadvantage that only a set charging speed can be provided when installing a kiosk.

The technical problem to be solved by the present invention is to provide a communication device that improves communication performance through efficient antenna placement.

In order to solve the above technical problem, the communication device according to this embodiment includes an NFC module that transmits and receives signals with Electric Vehicle Supply Equipment (EVSE), Electric Vehicle Communication Controller (EVCC), and a mobile terminal; and a control module that transmits a control signal to the EVSE and EVCC using a signal received from the mobile terminal.

The NFC module transmits a vehicle recognition signal to the mobile terminal when the charging gun of the EVSE is mounted on the vehicle, and when a vehicle charging completion signal is received from the EVCC, it can transmit a vehicle charging payment signal to the EVSE and the mobile terminal. .

The NFC module transmits and receives a signal about the vehicle charging state between the EVSE and the EVCC, and the signal about the vehicle charging state may include at least one of charging speed, charging charge, charging amount, and remaining charging time.

The control module of the communication device may be formed independently from the control module of the EVCC.

In order to solve the above technical problem, a communication device according to another embodiment of the present invention includes a first communication module for transmitting and receiving signals with EVSE (Electric Vehicle Supply Equipment); A second communication module that transmits and receives signals with an EVCC (Electric Vehicle Communication Controller); A third communication module for transmitting and receiving signals with a mobile terminal; and a control module connected to the first to third communication modules and generating a control signal to the EVSE and the EVCC using a signal received from the third communication module, wherein the first communication module and the third communication module are connected to the third communication module. 3The communication module is an NFC module.

The protocol performed through the second communication module may use the CAN (Controller Area Network) protocol.

In order to solve the above technical problem, a communication method according to another embodiment of the present invention is a communication device that controls vehicle charging by transmitting and receiving signals with EVSE, EVCC, and mobile terminal, and when a vehicle entry signal is received from the EVSE, the communication method transmitting a signal to cause the EVCC to transition from sleep mode to ready mode; When the charging gun of the EVSE is mounted on the vehicle, transmitting a vehicle recognition signal to the mobile terminal and transmitting a signal to switch the EVCC from ready mode to charging mode; Transmitting a signal about the vehicle charging state received from the EVCC to the EVSE and the mobile terminal; And upon receiving a vehicle charging completion signal from the EVCC, transmitting a vehicle charging payment signal to the EVSE and the mobile terminal, using NFC communication for signal transmission and reception with the EVSE and signal transmission and reception with the mobile terminal.

The signal about the vehicle charging state may include at least one of charging speed, charging charge, charging amount, and remaining charging time.

According to embodiments of the present invention, direct and indirect effects due to separation of power lines and communication lines can be minimized, and communication failures can be prevented when using large power.

In addition, a wireless environment can be created through high-performance antennas, and coverage can be expanded through multiple antennas, minimizing location constraints.

In addition, by selecting and placing the antenna in a location that minimizes the impact of the electric field caused by the Wi-Fi module and EVCC module, it is possible to develop a high-performance antenna with excellent passive performance.

Additionally, an EVCC module with high efficiency characteristics can be designed through an optimized design that takes into account the radiation pattern design between multiple antennas.

In addition, charging and payment can be made using EVSE's Wi-Fi zone, personal mobile terminal, or vehicle, without restrictions on the location where the vehicle charging kiosk is installed.

Additionally, since there is no need to install a separate kiosk, it may be possible to add existing vehicle charging stations and expand charging facilities.

Additionally, the radiated signal may have directivity in a specific direction depending on the area, array spacing, location, and phase difference settings of the antenna.

Additionally, by placing a shield can coated with ferrite inside the communication device, it is possible to maximize the reduction of electromagnetic fields generated from electronic components inside the device as well as noise generated outside the device.

In addition, in a communication device equipped with multiple antennas, the correlation coefficient, which is an index of influence between antennas, can be optimized through the ground matching circuit and fill cut unit, and the isolation degree can be increased.

1 to 3 are block diagrams of a wireless charging control device according to an embodiment of the present invention.
Figure 4 is a block diagram of a wireless charging control device according to another embodiment of the present invention.
Figure 5 is a block diagram of a wireless charging control device according to another embodiment of the present invention.
Figure 6 is a flowchart of a wireless charging control method according to an embodiment of the present invention.
Figure 7 shows the appearance of a communication device according to an embodiment of the present invention.
Figure 8 is a block diagram of a communication device according to an embodiment of the present invention.
Figure 9 is a block diagram of a communication device according to another embodiment of the present invention.
10 and 11 are exploded perspective views of a communication device according to an embodiment of the present invention.
12 to 30 show a communication device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining or replacing.

In addition, terms (including technical and scientific terms) used in this embodiment have meanings that can be generally understood by those skilled in the art to which this embodiment belongs, unless specifically defined and described. The meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology.

Additionally, the terms used in this embodiment are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and B and C", it is combined with A, B, and C. It can contain one or more of all possible combinations.

Additionally, in describing the components of this embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and are not limited to the essence, order, or order of the component.

And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, that component is directly 'connected', 'coupled', or 'connected' to that other component. In addition to cases, it may also include cases where the component is 'connected', 'coupled', or 'connected' by another component between that component and that other component.

Additionally, when described as being formed or disposed “on top” or “bottom” of each component, “top” or “bottom” means that the two components are directly adjacent to each other. This includes not only cases of contact, but also cases where one or more other components are formed or disposed between two components. In addition, when expressed as “top” or “bottom,” the meaning of not only the upward direction but also the downward direction can be included based on one component.

1 to 3 are block diagrams of a wireless charging control device according to an embodiment of the present invention, FIG. 4 is a block diagram of a wireless charging control device according to another embodiment of the present invention, and FIG. 5 is a block diagram of another wireless charging control device according to an embodiment of the present invention. This is a block diagram of a wireless charging control device according to an embodiment, and Figure 6 is a flowchart of a wireless charging control method according to an embodiment of the present invention.

Hereinafter, a wireless charging control device 10 according to the first embodiment according to the present invention will be described.

Referring to FIG. 1, a charging system including an electric vehicle according to the first embodiment of the present invention may include a vehicle 1 and electric vehicle supply equipment (EVSE) 30. The vehicle 1 is an electric vehicle (EV) and can be charged from the EVSE 30. In order for the vehicle 1 to receive charging power from the EVSE 30, the charging cable connected to the EVSE 30 may be connected to the inlet of the vehicle 1.

EVSE 30 is a facility that supplies AC or DC, and can be placed at a charging station or within a home. EVSE 30 is not limited to a location and may be implemented to be portable. In this specification, EVSE 30 may be used interchangeably with a charging station (Supply), an AC charging station (AC supply), a DC charging station (DC supply), a socket-outlet, etc.

The Electric Vehicle Communication Controller (EVCC) 20 is a component included in the vehicle 1 and can be connected to the Electronic Control Unit (ECU) 50 within the vehicle 1. The EVCC 20 can control the charging signal and charging power amount within the vehicle.

The wireless charging control device 10 according to the first embodiment of the present invention may include a wireless communication module 11 and a control module 12.

The wireless charging control device 10 is described as a separate configuration from the EVCC 20, but the wireless charging control device 10 is a configuration included in the EVCC 20 and includes the EVCC 20, EVSE 30, and mobile terminal. It may be configured to perform wireless communication with (40). The wireless charging control device 10 is a wireless communication charging control module. The wireless charging control device 10 is not controlled by the Micro Control Unit (MCU) of the EVCC 20 and may include a separate control module.

The wireless charging control device 10 may issue instructions for operating the MCU of the EVCC 20 through a control module 12 configured separately from the EVCC 20 through a signal received from the mobile terminal 40. In addition, the wireless charging control device 10 receives signals for vehicle charging and payment from the EVCC 20 and EVSE 30 and transmits them to the mobile terminal 40, allowing the user to charge the vehicle through the mobile terminal 40. We can provide a service that can monitor the situation.

The wireless communication module 11 can transmit and receive signals with the EVCC 20, EVSE 30, and mobile terminal 40. The wireless communication module 11 may receive signals from the EVCC 20, EVSE 30, and mobile terminal 40, and transmit the received signals to the control module 12. Additionally, the wireless communication module 11 may transmit the signal received from the control module 12 to at least one of the EVCC 20, EVSE 30, and mobile terminal 40.

The wireless communication module 11 may include a Wi-Fi module and a short-range communication module. The wireless communication module 11 may include a wireless personal area network (W-PAN), a wireless local area network (W-LAN), etc. W-PAN may include ZigBee, Bluetooth, and Ultra Wide Band (UWB), and W-LAN may include WIFI. Although the wireless communication module 11 has been described as performing wireless communication, it is not particularly limited to this, and it is natural that wired communication can be performed in addition to wireless communication.

The wireless communication module 11 may include a Near Field Communication (NFC) module. NFC is a technology that enables communication between wireless devices at short distances and is a type of non-contact short-distance wireless communication using the 13.56Mhz RF (Radio Frequency) frequency band. When the wireless communication module 11 is an NFC module, the wireless communication module 11 and EVSE 30 must be maintained at a short distance to perform communication, so they can be mounted in various locations such as the vehicle's side mirror or driver's door. .

When the wireless communication module 11 is an NFC module, the EVSE 30 may include an NFC reader (Reader) to communicate with the NFC module in the vehicle 1. When the vehicle (1) enters the EVSE (30) area and the NFC reader embedded in the EVSE (30) and the NFC module of the vehicle (1) are in a short range state where they can communicate with each other, the vehicle (1) is in the ready mode ( Ready Mode) switching, information on vehicle charging status, etc. can be communicated.

The control module 12 may generate control signals to the EVSE 30 and EVCC 20 using signals received from the mobile terminal 40. The control module 12 may generate a control signal for charging using signals received from the EVCC 20, EVSE 30, and mobile terminal 40.

The control module 12 may generate a separate control signal without being controlled by the Micro Control Unit (MCU) of the EVCC 20. The control module 12 of the wireless charging control device 10 may be formed independently from the control module of the EVCC 20. The control module 12 may receive a signal input by the user from the mobile terminal 40 and generate control signals for charging and billing to the EVCC 20 and EVSE 30.

The control module 12 may provide information about various vehicle charging states according to signals requested from the EVCC 20, EVSE 30, and mobile terminal 40. Information about the vehicle charging state may include various information.

For example, charging state information may include information about charging mode, battery charging reservation, battery charging start/end, charging error, charging control, charging current, voltage, and power. Battery status information may include information about battery charging rate, battery temperature (cell internal/external temperature), voltage/current charging constant, etc. Authentication information may include information about vehicle ID, user ID, EVSE ID, etc. Charging billing information may include information about power rates, charging time, load information, meter data, billing data, etc.

The control module 12 may generate control signals that are transmitted to the EVCC 20, EVSE 30, and mobile terminal 40 according to the charging stage. Below, it is explained that the control module 12 transmits and receives control signals, but the signals generated by the control module 12 may be transmitted and received to each component through the wireless communication module 11.

When the vehicle 1 enters the area of the EVSE 30, the control module 12 receives the entry signal of the EVSE 30 and switches the EVCC 20 from Sleep Mode to Ready Mode. ) can transmit a signal to switch to ). When the charging gun of the EVSE 30 is mounted on the vehicle 1, the control module 12 can transmit a vehicle recognition signal to the mobile terminal 40. Alternatively, when entering the charging area of the EVSE 30 that supports wireless charging, the control module 12 may transmit a vehicle recognition signal to the mobile terminal 40.

Thereafter, when a signal for a vehicle charging start request is received from the mobile terminal 40, the control module 12 may transmit a charging start signal to the EVSE 30 and EVCC 20. The control module 12 may provide information about the vehicle charging state received from the EVCC 20 according to a request signal from the mobile terminal 40 or a request signal from the EVSE 30 during charging. If a problem occurs with the vehicle, battery, or EVSE during charging, the control module 12, which receives a problem signal from each component, transmits a signal notifying that a problem has occurred to the mobile terminal 40 and takes action. I can guide you.

When the control module 12 receives a vehicle charging completion signal from the EVCC 20, it can transmit the vehicle charging billing information and payment signal received from the EVSE 30 to the mobile terminal 40. The user can pay the vehicle charging fee through the mobile terminal 40. Afterwards, the charging gun of the EVSE (30) is detached from the vehicle (1) and vehicle charging is completed.

Referring to FIG. 5, the EVSE 30 includes a wireless communication module 31 and can directly transmit and receive control signals according to vehicle charging operations with the mobile terminal 40. Through this, the EVSE 30 can transmit and receive signals directly to the mobile terminal 40 without going through the wireless charging control device 10 included in the vehicle 1.

According to embodiments of the present invention, direct and indirect effects due to separation of power lines and communication lines can be minimized, communication failures can be prevented when using high power, and a wireless environment can be created through a high-performance antenna. Location constraints can be minimized by expanding coverage. In addition, charging and payment can be made through EVSE's Wi-Fi zone, personal mobile terminal, or vehicle without restrictions on the location where the vehicle charging kiosk is installed. Since there is no need to install a separate kiosk, it is possible to add existing vehicle charging stations and expand charging facilities. You can.

Hereinafter, with reference to FIG. 4, a wireless charging control device 10 according to a second embodiment of the present invention will be described. The description of the first embodiment of the present invention can be applied to the second embodiment of the present invention, and duplicate descriptions will be omitted.

Referring to Figure 4, the wireless charging control device 10 according to the second embodiment of the present invention includes a first communication module 13, a second communication module 14, a third communication module 15, and a control module ( 12) may be included.

The first communication module 13 can transmit and receive signals with the EVSE 30. The first communication module 13 may be performed by a protocol supporting PLC (Power Line Communication). The second communication module 14 can transmit and receive signals with the EVCC 20. The second communication module 14 may be performed using a protocol supporting CAN (Controller Area Network).

The third communication module 15 can transmit and receive signals with the mobile terminal 40. The third communication module 15 may include a Wi-Fi module and a short-range communication module. The third communication module 15 may include W-PAN (Wireless Personal Area Network), W-LAN (Wireless Local Area Network), etc. W-PAN may include ZigBee, Bluetooth, and Ultra Wide Band (UWB), and W-LAN may include WIFI. The third communication module 15 may have a configuration corresponding to the wireless communication module 11 included in the first embodiment of the present invention.

Referring to FIG. 9, the wireless charging control device 10 according to the second embodiment of the present invention can transmit and receive signals through the NFC function. The first communication module 13 that communicates with the EVSE 30 may include an NFC module. At this time, the EVSE 30 may include an NFC reader to communicate with the NFC module, which is the first communication module 13. The charging gun of EVSE 30 may include an NFC reader. The third communication module 15 that communicates with the mobile terminal 40 may include an NFC module. At this time, the mobile terminal 40 may include an NFC reader to communicate with the NFC module, which is the third communication module 15. The first to third communication modules 13, 14, and 15 may include a communication module for communication through NFC technology.

The control module 12 is connected to the first to third communication modules 13, 14, and 15 and sends a control signal to the EVCC 20 and EVSE 30 using the signal received from the third communication module 15. can be created. More specifically, the control module 12 generates a charging control signal using signals from the EVCC 20, EVSE 30, and mobile terminal 40, and the generated charging control signal is generated from the EVCC 20, EVSE ( 30) and the first to third communication modules 13, 14, and 15 respectively connected to the mobile terminal 40. The control module 12 may be formed independently from the control module of the EVCC 20.

Figure 6 is a flowchart of a wireless charging control method according to an embodiment of the present invention. The detailed description of each step in FIG. 6 corresponds to the detailed description of the wireless charging control device in FIGS. 1 to 5, and redundant description will be omitted below.

In the wireless charging control device that controls vehicle charging by transmitting and receiving signals with EVSE, EVCC, and mobile terminal, when receiving a vehicle entry signal from EVSE in step S11, a signal is transmitted to enable EVCC to switch from sleep mode to ready mode, and S12 In step S13, when the charging gun of the EVSE is mounted on the vehicle, a vehicle recognition signal is transmitted to the mobile terminal and a signal is transmitted to enable the EVCC to switch from the ready mode to the charging mode. In step S13, a signal about the vehicle charging status received from the EVCC is sent to the EVSE and It is transmitted to the mobile terminal, and when a vehicle charging completion signal is received from the EVCC in step S14, a vehicle charging payment signal is transmitted to the EVSE and the mobile terminal. The signal about the vehicle charging state may include at least one of charging speed, charging charge, charging amount, and remaining charging time.

Figure 7 shows the appearance of a communication device according to an embodiment of the present invention, Figure 8 is a block diagram of a communication device according to an embodiment of the present invention, and Figures 10 and 11 are communication diagrams according to an embodiment of the present invention. It is an exploded perspective view of the device, and FIGS. 12 to 30 are diagrams for explaining a communication device according to an embodiment of the present invention.

The communication device 10 according to an embodiment of the present invention may include a first case 1111 and a second case 1112 coupled to the first case 1111. The first substrate 1000 may be placed in the second case 1112. The first substrate 1000 may be placed in the internal space formed by combining the first case 1111 and the second case 1112. The first case 1111 and the second case 1112 may be referred to as a first body and a second body, may be referred to as a first cover and a second cover, and may be referred to as an upper cover and a lower cover. .

The communication device 10 may include an antenna unit and a communication module 200 disposed on the first substrate 1000. The antenna unit may include a first antenna unit 110 and a second antenna unit 120 that are symmetrically formed around the communication module 200. The communication device 10 includes a first antenna unit 110 and a second antenna unit 120 disposed in a first area 1100 of a first substrate 1000, and a second antenna unit 120 of the first substrate 1000. It may include a communication module 200 disposed in the area 1200. In addition to the communication module 200, EVCC circuits and components may be disposed in the second area 1200 of the first substrate 1000. The second area 1200 of the first substrate 1000 may be divided into a third area where the communication module 200 is placed and a fourth area where the EVCC is placed. The third region of the first substrate 1000 may be formed to protrude from the fourth region. The first antenna unit 110, the second antenna unit 120, and the communication module 200 may be placed at the edge of the first substrate 1000, which is an area to minimize EMC generated in the circuit.

The communication device 100 may include a shield can 1500 disposed in the first case 1111 and the second case 1112. The shield can 1500 may include a top plate facing the second region 1200 of the first substrate 1000 and a side plate extending downward from the top plate. The upper plate of the shield can 1500 may be arranged to contact the inner surface of the first case 1111. The upper plate of the shield can 1500 may be disposed to be spaced apart from the first substrate 1000. The side plate of the shield can 1500 may be disposed between the first area 1100 and the second area 1200 of the first substrate 1000. The side plate of the shield can 1500 may spatially separate the first area 1100 and the second area 1200 of the first substrate 1000. The side plate of the shield can 1500 may be disposed at the boundary between the first area 1100 and the second area 1200 of the first substrate 1000. The side plate of the shield can 1500 may be disposed between the first antenna portion 110 of the first substrate 1000 and the communication module 200. The side plate of the shield can 1500 may be disposed between the second antenna portion 120 of the first substrate 1000 and the communication module 200. The side plate of the shield can 1500 may be disposed between the EVCC component disposed in the second area 1200 and the first antenna unit 110 disposed in the first area 1100. The side plate of the shield can 1500 may be disposed between the EVCC component disposed in the second area 1200 and the second antenna unit 120 disposed in the first area 1100.

The shield can 1500 may be made of a material containing at least one of aluminum (Al) and copper (Cu). A shielding agent may be painted on the surface of the shield can 1500. A radio wave absorber may be painted on the surface of the shield can 1500. The surface of the shield can 1500 may be painted with ferrite. The shield can 1500 may be coated with ferrite on at least one of the inner and outer surfaces. Through this, the shield can 1500 can absorb electromagnetic field signals generated inside or outside the communication device 100, guide them to the surface, and remove them. In addition, the electromagnetic field influence due to the formation of the electric field of the antenna in the EVCC circuit within the communication device 100 can be minimized.

The shield can 1500 may be electrically connected to the ground portion of the first substrate 1000. The shield can 1500 may be electrically connected to the ground portion within the communication device 100. The shield can 1500 may be electrically connected to the ground portion of the vehicle where the communication device 100 is placed. The shield can 1500 can guide signal noise generated in the communication device 100 to the ground unit. Through this, signal interference between the EVCC circuit and the antenna unit within the communication device 100 can be minimized, and mutual electromagnetic influence can be minimized.

The first antenna unit 110 and the second antenna unit 120 may include a short-distance communication module. The first antenna unit 110 and the second antenna unit 120 may include a Bluetooth antenna. The communication module 200 may include at least one of a wireless communication module, a Wi-Fi module, a Bluetooth module, and a short-range communication module. A shield can surrounding the communication module 200 may be placed on top of the communication module 200. A cover may be placed on the top of the communication module 200.

The first antenna unit 110 and the second antenna unit 120 are spaced apart from the communication module 200 at a predetermined distance to minimize the effect of parasitic capacitance caused by the shield can of the communication module 200 that affects antenna performance. You can. Through this, even if the ultra-small module WiFi and Bluetooth antennas are adjacent, signal interference between them can be minimized, and wireless WiFi transmission rate can be secured when operating simultaneously with Bluetooth.

The first antenna unit 110 may be arranged to face one side of the communication module 200, and the second antenna unit 120 may be arranged to face the other side of the communication module 200. The first antenna unit 110 and the second antenna unit 120 may be connected to the communication module 200. The first antenna unit 110 and the second antenna unit 120 may be electrically connected to the communication module 200. The first antenna unit 110 and the second antenna unit 120 may be arranged symmetrically with respect to the communication module 200. The first antenna unit 110 and the second antenna unit 120 are formed in the same shape and may be formed in a symmetrical shape with respect to the communication module 200. The first antenna unit 110 and the second antenna unit 120 may be configured as a MIMO (Multiple-Input Multipl-Output) antenna. Since the first antenna unit 110 and the second antenna unit 120 are arranged to be spaced apart from each other around the communication module 200, mutual interference of electromagnetic waves can be prevented and isolation can be improved.

The first antenna unit 110 and the second antenna unit 120 may be formed with a plurality of radiating units having various frequency bands for various communications. In particular, for short-distance communication, radiators for Wi-Fi, Bluetooth, GPS, and NFC may be needed.

The first antenna unit 110 and the second antenna unit 120 are each connected to a power supply unit 111, 121 connected to the first area 1100 of the first substrate 1000, and a power supply unit 111, 121. It may include a first radiating part, a second radiating part connected to the first radiating part, and ground parts 112 and 122 connected to the second radiating part and the first area 1100 of the first substrate 1000. You can. Current is applied to each of the first antenna unit 110 and the second antenna unit 120 through the power feeding units 111 and 121, and according to the current applied through the power feeding units 111 and 121, the first radiating unit and the The second radiating unit radiates signals each having a predetermined frequency band to the outside. At this time, the phase of the signal radiated through each radiation pattern forming the first radiating unit and the second radiating unit is implemented to be different.

The first antenna unit 110 and the second antenna unit 120 may be PIFA antennas. PIFA (Planar Inverted F Antenna) is a planar inverted F antenna, which means a planar antenna in which a square patch plate of a smaller area is placed on the ground plane of the flat plate as if the F is inverted. It may be composed of a ground plane, a radiating patch, a power feeder, and a shorting portion (shorting pin or shorting strip). The PIFA antenna acts as a radiating element as the patch resonates with the ground plane by feeding current, and the bandwidth, gain, and resonance frequency can be determined depending on the length, width, and height of the patch, the location of the feed line, and the location of the shorting pin. .

The first radiating portion may include first patterns 113 and 123 connected to the power feeding portions 111 and 121 and second patterns 114 and 124 extending from one end of the first patterns 113 and 123. The second radiation portion may include third patterns 115 and 125 connected to the ground portions 112 and 122 and fourth patterns 116 and 126 perpendicular to the third patterns 115 and 125. The first patterns 113 and 123 and the second patterns 114 and 124 may be arranged at an obtuse angle. The second patterns 114 and 124 may be arranged parallel to one side of the first substrate 1000. Each radiating part may be formed in various shapes and may vary depending on the design of the radiating part.

The first radiating unit and the second radiating unit may be a Wi-Fi radiating unit or a Bluetooth radiating unit. Alternatively, it may be radiation for other communications, such as a radiation portion for NFC. The first radiating unit and the second radiating unit may be radiating units for different purposes, respectively, or may be radiating units for the same purpose. The width of the first radiating part may be formed to be larger than the width of the second radiating part. The first radiating unit can cause resonance in the frequency band of 5.0 to 5.2 GHz. The second radiating unit may cause resonance in a frequency band of 2.4 to 2.5 GHz.

Referring to FIG. 15, the distance A between the first antenna unit 110 and the second antenna unit 120 may range from 46.5 mm to 48 mm or approximately 47.4 mm. The distance B between the second patterns 114 and 124 and the side of the first substrate 1000 facing the second patterns 114 and 124 may be 0.2 mm or more and 1 mm or less, and may be about 0.5 mm. It can be formed as The distance (C) between the third area of the first substrate 1000 where the communication module 200 is disposed and one side of the first substrate 1000 may be 23.5 mm or more and 24.5 mm or less, and is about 24 mm. It can be formed as The distance D between the communication module 200 and the first antenna unit 110 may be 14.5 mm or more and 16 mm or less, and may be about 15.2 mm. The distance (E) between the communication module 200 and the side of the first substrate 1000 facing the communication module 200 may be 4 mm or more and 5.5 mm or less, and may be formed to be about 4.8 mm. It is natural that the shape of the first antenna unit 110 according to FIG. 12 and the length and spacing of each radiating unit may vary depending on antenna characteristics.

The communication device 100 may include second substrates 2001 and 2002 disposed on the antenna unit. The second substrates 2001 and 2002 may be arranged perpendicular to the first substrate 1000. The second substrates 2001 and 2002 may be disposed at an inclination angle with the first substrate 1000. The second substrates 2001 and 2002 may be disposed at an acute angle with the first substrate 1000. The second substrates 2001 and 2002 may be disposed to form an obtuse angle with the first substrate 1000. The second substrates 2001 and 2002 may be disposed on the side of the first substrate 1000. The second substrates 2001 and 2002 may be arranged to face the side of the first substrate 1000. The second substrates 2001 and 2002 may be disposed in contact with the side surface of the first substrate 1000. A portion of the second substrates 2001 and 2002 may be disposed on the first substrate 1000, and the remainder of the second substrates 2001 and 2002 may not be disposed on the first substrate 1000. A portion of the second substrates 2001 and 2002 may overlap with the first substrate 1000, and a portion of the second substrates 2001 and 2002 may not overlap with the first substrate 1000. The second substrates 2001 and 2002 may be arranged to face the first area 1100 of the first substrate 1000. The second substrates 2001 and 2002 may be disposed to be spaced apart from the second region 1200 of the first substrate 1000. The second substrate 2001 may be arranged to face the first antenna portion 110 of the first substrate 1000. The second substrate 2002 may be disposed to face the second antenna portion 120 of the first substrate 1000.

Transmissive antenna units 160 and 170 may be disposed on the second substrates 2001 and 2002, respectively. The transmission antenna unit may include a first transmission antenna unit 160 arranged to face the first antenna unit 110 and a second transmission antenna unit 170 arranged to face the second antenna unit 120. The signal radiated from the first antenna unit 110 may be radiated through the first transmission antenna unit 160. The signal radiated from the second antenna unit 120 may be radiated through the second transmission antenna unit 170. The first transmission antenna unit 160 may be a third antenna, and the second transmission antenna unit 170 may be a fourth antenna. The radiation signal passing through the transmission antenna units 160 and 170 may have directivity in a specific direction. Directionality can mean a phenomenon that exhibits strong properties in a specific direction or a property that has strong intensity toward a specific direction.

The transmission antenna units 160 and 170 include first transmission patterns 161 and 171 disposed on the first side of the second substrate 2001 and 2002 and a second transmission pattern disposed on the second side opposite to the first side. May include (162, 172). The second substrates 2001 and 2002 include first transmission patterns 161 and 171 disposed on the first side of the second substrates 2001 and 2002 and a second transmission pattern disposed on the second side opposite to the first side. May include (162, 172). The first transmission patterns 161 and 171 may be disposed adjacent to the antenna units 110 and 120.

The transmission antenna units 160 and 170 include a first transmission pattern 161 and 171 disposed on one side of the second substrate 2001 and 2002 facing the antenna unit 110 and 120, and a second substrate 2001 and 2002. ) and may include second transmission patterns 162 and 172 corresponding to the first transmission patterns 161 and 171.

The first transmission patterns 161 and 171 of the transmission antenna units 160 and 170 collect signals radiated from the antenna units 110 and 120, and the second transmission patterns 162 and 172 radiate the collected signals. You can. The transmission antenna units 160 and 170 may serve to adjust the signal radiation form by inducing a separate electromagnetic field to the signal radiated from the antenna units 110 and 120. The transmission antenna units 160 and 170 may adjust the radiation form of the signal so that the signal radiated from the antenna units 110 and 120 has directivity in a specific direction. The transmission antenna units 160 and 170 may beam form signals radiated from the antenna units 110 and 120. Here, beam forming refers to a technology that focuses the signal on a receiving device located in a specific direction rather than radiating the signal from the antenna in all directions. Therefore, the quality of the signal delivered to the signal receiver can be improved without amplifying the transmitted power through the transmission antenna units 160 and 170. Additionally, it is possible to speed up information transmission and minimize the occurrence of signal errors. Additionally, signal interference can be minimized because signals are not radiated in unnecessary directions.

The first transmission antenna unit 160 is disposed on one side of the second substrate 2001 facing the first antenna unit 110, and the first transmission pattern 161 is disposed on the other side of the second substrate 2001. It may include a second transmission pattern 162 corresponding to the first transmission pattern 161. The signal radiated from the first antenna unit 110 may be radiated by passing from the first transmission pattern 161 of the first transmission antenna unit 160 to the second transmission pattern 162. The second transmission antenna unit 170 has a first transmission pattern 171 disposed on one side of the second substrate 2002 facing the second antenna unit 120, and is disposed on the other side of the second substrate 2002. It may include a second transmission pattern 172 corresponding to the first transmission pattern 171. The signal radiated from the second antenna unit 120 may be radiated by passing from the first transmission pattern 171 to the second transmission pattern 172 of the second transmission antenna unit 170.

The first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may be electrically connected. The second substrates 2001 and 2002 may include a plurality of layers. Among the plurality of layers of the second substrate 2001 and 2002, first transparent patterns 161 and 171 may be disposed on the uppermost layer, and second transparent patterns 162 and 172 may be disposed on the lowermost layer. The first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may be electrically connected through a plurality of layers disposed between the top layer and the bottom layer.

The first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may be different from each other. The shape of the first transmission patterns 161 and 171 may be formed as a single figure. The shape of the second transmission patterns 162 and 172 may include a plurality of shapes. The area of the second transmission patterns 162 and 172 may be smaller than the area of the first transmission patterns 161 and 171.

The first transmission patterns 161 and 171 may have a strip shape. The first transmission patterns 161 and 171 may have a rectangular shape. The first transmission patterns 161 and 171 may have an oval shape. The first transmission patterns 161 and 171 may be octagonal in shape.

The second transmission patterns 162 and 172 may have a plurality of shapes. The plurality of shapes forming the second transmission patterns 162 and 172 may all be formed to have the same size. The second transmission patterns 162 and 172 may be formed of a plurality of shapes arranged to be spaced apart from each other. The second transmission patterns 162 and 172 may be formed of a plurality of shapes spaced apart from each other at equal intervals. The second transmission patterns 162 and 172 may have a plurality of circular shapes. The second transmission patterns 162 and 172 may have a plurality of oval shapes. The second transmission patterns 162 and 172 may have a plurality of square shapes. The second transmission patterns 162 and 172 may have a plurality of octagonal shapes.

When the second transmission patterns 162 and 172 of the first transmission antenna unit 160 and the second transmission patterns 162 and 172 of the second transmission antenna unit 170 include a plurality of circular patterns, the first transmission The diameter of the circular pattern of the antenna unit 160 may be different from the diameter of the circular pattern of the second transmission antenna unit 170. The spacing between the circular patterns of the first transmission antenna unit 160 may be different from the spacing between the circular patterns of the second transmission antenna unit 170.

The shapes of the first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may be modified into various shapes depending on directivity. In addition, based on the main frequency of the signal radiated from the antenna, the sizes of the first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 and the intervals between the plurality of second transmission patterns 162 and 172 are It can be adjusted. The signal radiated from the antenna may be at least one of 2.4 GHz and 5 GHz.

The first transmission antenna unit 160 may include a first pattern, and the first pattern may include an inner pattern and an outer pattern. The second transmission antenna unit 170 may include a second pattern, and the second pattern may include an inner pattern and an outer pattern. Here, the inner pattern may refer to a pattern disposed in a direction facing the first substrate 1000, and the outer pattern may refer to a pattern disposed in a direction facing the side plate of the shield case.

For the first pattern or the second pattern, the area of the inner pattern may be larger than the area of the outer pattern. Through this, it is possible to more efficiently collect and radiate signals generated from the antenna unit through the inner pattern located close to the antenna unit and the outer pattern located in the opposite direction to the inner pattern.

The ratio of the area of the outer pattern to the area of the inner pattern of the first pattern may be different from the ratio of the area of the outer pattern to the area of the inner pattern of the second pattern. By configuring the ratio of the area of the outer pattern to the inner pattern to be different on both sides, the radiated signal can be directional.

The area of the second transmission patterns 162 and 172 may be smaller than the area of the first transmission patterns 161 and 171. The area of the second transmission patterns (162, 172) must be smaller than the area of the first transmission patterns (161, 171) so that the signal received from the first transmission patterns (161, 171) is effectively transmitted to the second transmission patterns (162, 172). It can be output as .

The first transmission patterns 161 and 171 may be formed to have a size corresponding to the entirety of the second transmission patterns 162 and 172. The first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may be arranged to overlap with respect to the direction penetrating the second substrates 2001 and 2002. For example, as the circular diameter of the second transmission patterns 162 and 172 increases, the square shape of the first transmission patterns 161 and 171 may also increase. As the circular diameters of the second transmission patterns 162 and 172 become smaller, the square shape of the first transmission patterns 161 and 171 may also become smaller. Based on the direction penetrating the second substrates 2001 and 2002, at least a portion of the first transmission patterns 161 and 171 may be arranged so as not to overlap the second transmission patterns 162 and 172.

Figure 17 shows various embodiments of the first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 disposed on the second substrates 2001 and 2002. When designing the communication device 100, the shape, size, and arrangement spacing of the first transmission patterns 161 and 171 and the second transmission patterns 162 and 172 may vary depending on the direction of the radiation signal. Hereinafter, the description will focus on the pattern of the first transmission antenna unit 160 arranged to face the first antenna unit 110.

Figures 17(a) and 17(b) show the second transmission pattern 162 and the first transmission pattern 161 formed in circular shapes with different diameters. As the diameter of the second transmission patterns 162 decreases, the gap between the second transmission patterns 162 may increase. Accordingly, even if the diameter of the second transmission pattern 162 becomes smaller, the length of the first transmission pattern 161 in the first direction is maintained, and the length in the second direction perpendicular to the first direction can be decreased. there is.

More specifically, the length F of the second substrate 2001 in the first direction may be 30 mm or more and 35 mm or less, and may be formed to be about 32 mm. The length G of the second substrate 2001 in the second direction may be 7 mm or more and 11 mm or less, and may be formed to be about 9 mm. The first direction and the second direction may be perpendicular to each other.

In FIG. 17(a), the length H of the first transmission pattern 161 in the first direction may be 15 mm or more and 23 mm or less, and may be formed to be about 19 mm. The length J of the first transmission pattern 161 in the second direction may be 1.5 mm or more and 3.5 mm or less, and may be formed to be about 2.4 mm. The diameter (I) of each circle forming the second transmission pattern 162 may be 1.5 mm or more and 3.5 mm or less, and may be formed to be about 2.4 mm. The distance M between the centers of each circle forming the second transmission pattern 162 may be 3.15 mm or more and 5.15 mm or less, and may be formed to be about 4.15 mm.

In FIG. 17(b), the length H of the first transmission pattern 161 in the first direction may be 15 mm or more and 23 mm or less, and may be formed to be about 19 mm. The length L of the first transmission pattern 161 in the second direction may be 1 mm or more and 3 mm or less, and may be formed to be about 1.2 mm. The diameter K of each circle forming the second transmission pattern 162 may be 1 mm or more and 3 mm or less, and may be formed to be about 1.2 mm.

The sizes of the first and second transmission patterns 161 and 162 and the intervals between the plurality of second transmission patterns 162 may be adjusted based on the main frequency of the signal radiated from the antenna. The signal radiated from the antenna may be at least one of 2.4 GHz and 5 GHz.

The length of the first transmission pattern 161 in the second direction may be formed to correspond to the diameter of the second transmission pattern 162. As the length of the first transmission pattern 161 in the second direction decreases, the intensity of the radiation signal transmitted through the second transmission pattern 162 may increase. As the diameter of the second transmission pattern 162 decreases, the intensity of the radiation signal transmitted through the second transmission pattern 162 may increase. As the diameter of the second transmission pattern 162 decreases, the radiation signal transmitted through the second transmission pattern 162 may radiate farther.

Figures 17(c) and 17(d) show that the transmission antenna portion is formed closer to one of the two sides of the second substrate 2001. Figures 17(c) and 17(d) show transmission antenna units formed adjacent to each other in different directions. Referring to FIG. 17(c), the first transparent pattern 161 and the second transparent pattern 162 may be disposed closer to the first side, which is one of the two sides of the second substrate 2001. The first transmission pattern 161 and the second transmission pattern 162 may be arranged to be more biased in one direction based on the center portion of the second substrate 2001. The first transparent pattern 161 and the second transparent pattern 162 may be arranged to overlap each other. Referring to FIG. 17(d), the first transmission pattern 161 and the second transmission pattern 162 may be disposed closer to the second side, which is the other side of the two sides of the second substrate 2001 and 2002. there is. The first transmission pattern 161 and the second transmission pattern 162 may be disposed closer to one of the two sides of the second substrate 2001 and 2002, so that they may have directivity toward a specific direction.

17(c) and 17(d), the length O of the first transmission pattern 161 in the first direction may be 9 mm or more and 15 mm or less, and may be formed to be about 12 mm. . The distance (N) between the centers of each circle forming the second transmission pattern 162 may be 3 mm or more and 7 mm or less, and may be formed to be about 5 mm. The limitations on the size of the second substrate and the size of each pattern above are merely illustrative and are not particularly limiting.

The first transmission pattern 161 and the second transmission pattern 162 of the first transmission antenna unit 160 and the first transmission pattern 161 and the second transmission pattern 162 of the second transmission antenna unit 170 are They may have the same shape and arrangement. The first transmission pattern 161 and the second transmission pattern 162 of the first transmission antenna unit 160 and the first transmission pattern 161 and the second transmission pattern 162 of the second transmission antenna unit 170 are They can have different shapes and arrangements. For example, the first transmission pattern 161 and the second transmission pattern 162 of the first transmission antenna unit 160 may be formed as shown in FIG. 17(a), and the first transmission pattern 161 and the second transmission pattern 162 of the first transmission antenna unit 160 may be formed as shown in FIG. The first transmission pattern 161 and the second transmission pattern 162 may be formed as shown in FIG. 17(b). In this case, since the intensity of the radiation signal transmitted from the second transmission antenna unit 170 is stronger, it can be directed toward the second transmission antenna unit 170.

Alternatively, the first transmission pattern 161 and the second transmission pattern 162 of the first transmission antenna unit 160 may be formed as shown in FIG. 17(c), and the first transmission pattern 162 of the second transmission antenna unit 170 may be formed as shown in FIG. 17(c). The transmission pattern 161 and the second transmission pattern 162 may be formed as shown in FIG. 17(d). In this case, the radiation signal passing through the transmission antenna unit may have directivity toward a direction in which each pattern is biased.

Depending on the area of the first transmission patterns 161, 171 and the second transmission patterns 162, 172 forming the transmission antenna units 160, 170, the arrangement spacing of the patterns, and the location of the patterns, the radiated signal is directional in a specific direction. You can have The area, array spacing, and location of the transmission pattern may be designed differently depending on where the communication device 100 is placed in the vehicle. Through this, the transmission antenna units 160 and 170 can focus the radiation signal on a receiving device located in a specific direction. Therefore, the quality of the signal delivered to the signal receiver can be improved without amplifying the transmitted power through the transmission antenna units 160 and 170. Additionally, it is possible to speed up information transmission and minimize the occurrence of signal errors. Additionally, signal interference can be minimized because signals are not radiated in unnecessary directions. For example, when the communication device 100 is placed on the left side of the vehicle, the transmission antenna unit may be designed to have left directivity.

When the areas of the first transmission patterns 161 and 171 are the same, the intensity of the signal radiated through the second transmission patterns 162 and 172 may vary depending on the size of the area of the second transmission patterns 162 and 172. . When the areas of the first transmission patterns 161 and 171 are the same, the size of the signal received through the first transmission patterns 161 and 171 is the same, and all received signals are transmitted through the second transmission patterns 162 and 172. Since the signal is radiated through the second transmission patterns 162 and 172, as the area of the second transmission pattern 162 and 172 becomes smaller, the intensity of the signal radiated through the second transmission pattern 162 and 172 may increase. Conversely, as the area of the second transmission patterns 162 and 172 increases, the intensity of the signal radiated through the second transmission patterns 162 and 172 may weaken. Increasing the strength of the signal may mean that the distance the signal reaches increases.

When the areas of the first transmission patterns 161 and 171 are the same and the areas of the second transmission patterns 162 and 172 are the same, the second transmission pattern ( 162, 172), the coverage of the signal radiated may vary. When the areas of the first transmission patterns 161 and 171 are the same and the areas of the second transmission patterns 162 and 172 are the same, the size of the signal received through the first transmission patterns 161 and 171 is the same. , Since all received signals are radiated through the second transmission patterns (162, 172), as the arrangement spacing of the second transmission patterns (162, 172) increases, the signal radiated through the second transmission patterns (162, 172) increases. Coverage can be increased. Conversely, as the arrangement spacing of the second transmission patterns 162 and 172 becomes smaller, the coverage of the signal radiated through the second transmission patterns 162 and 172 may decrease. Increasing signal coverage may mean that the size of the area where the signal reaches increases. For example, the radiated signal may be radiated in a spherical or hemispherical shape, and when the coverage of the signal increases, this may mean that the radius of the spherical or hemispherical shape increases.

Hereinafter, embodiments in which the area size, array spacing, and array position of the second transmission patterns 162 and 172 shown in FIGS. 18 to 25 are designed to be variously changed, and the shape and signal directivity of the radiation signal according to each embodiment will be described. Explain.

18 shows the circular patterns of the second transmission pattern 162 of the first transmission antenna unit 160 and the second transmission pattern 172 of the second transmission antenna unit 170 having the same diameter and the same spacing (A). area) is shown. FIG. 19 shows coverage of the E-Field of the communication device of the present invention when the communication device has the same form as FIG. 18. Referring to FIG. 19, the E-Field by the first transmission antenna unit 160 and the second transmission antenna unit 170 may be formed with the same size and same intensity.

20 shows that the diameter (area A) of the circular pattern of the second transmission pattern 162 of the first transmission antenna unit 160 is the diameter of the circular pattern of the second transmission pattern 172 of the second transmission antenna unit 170. (B diameter) is shown to be formed larger than that. FIG. 21 shows coverage of the E-Field of the communication device of the present invention when the communication device has the same form as FIG. 20. Referring to FIG. 21, the E-Field by the second transmission antenna unit 170 can be formed with stronger intensity in a farther area than the E-Field by the first transmission antenna unit 160.

22 shows that the circular pattern of the second transmission pattern 162 of the first transmission antenna unit 160 is formed to be biased to the left (area D), and the second transmission pattern of the second transmission antenna unit 170 ( 172) shows that the circular pattern is formed to be biased toward the right (area C). FIG. 23 shows coverage of the E-Field of the communication device of the present invention when the communication device has the same form as FIG. 22. Referring to FIG. 23, the E-Field by the first transmission antenna unit 160 may be formed by being deflected in the left direction, and the E-Field by the second transmission antenna unit 170 may be formed by being deflected in the right direction. It can be.

24 shows that the circular pattern of the second transmission pattern 162 of the first transmission antenna unit 160 is formed to be biased to the right (area C), and the second transmission pattern of the second transmission antenna unit 170 ( 172) shows that the circular pattern is formed to be biased toward the right (area C). FIG. 25 shows the coverage of the E-Field of the communication device of the present invention when the communication device has the same form as that of FIG. 24. Referring to FIG. 25, the E-Field by the first transmission antenna unit 160 may be formed by being deflected in the right direction, and the E-Field by the second transmission antenna unit 170 may be formed by being deflected in the right direction. It can be.

26 and 27 show modified arrangements of the second substrates 2001 and 2002 on the first substrate 1000. The position and angle of the second substrates 2001 and 2002 may be changed depending on the target direction of the signal to be radiated. The second substrates 2001 and 2002 may be disposed along the edge of the first substrate 1000. A portion of the second substrates 2001 and 2002 may be disposed on the first substrate 1000, and the remainder of the second substrates 2001 and 2002 may not be disposed on the first substrate 1000. A portion of the second substrates 2001 and 2002 may overlap with the first substrate 1000, and a portion of the second substrates 2001 and 2002 may not overlap with the first substrate 1000.

The second substrates 2001 and 2002 may be arranged perpendicular to the first substrate 1000. The second substrates 2001 and 2002 may be arranged to form an acute angle with the first substrate 1000. The second substrates 2001 and 2002 may be arranged to form an obtuse angle with the first substrate 1000. When the second substrate (2001, 2002) and the first substrate (1000) form an acute angle, the distance between the antenna units (110, 120) and the transmission antenna units (160, 170) becomes closer, so that the second substrate (2001, 2002) ) The intensity of the signal radiated through the transmission antenna units 160 and 170 can be increased. When the second substrate (2001, 2002) and the first substrate (1000) form an obtuse angle, the distance between the antenna unit and the transmission antenna unit increases, so that the signal radiated through the transmission antenna unit of the second substrate (2001, 2002) The intensity may weaken.

FIG. 28 is a diagram for explaining a technology in which a radiation signal has a phase difference according to the length of a line connecting the first transmission patterns 161 and 171 and the second transmission patterns 162 and 172. Hereinafter, the description will focus on the first transmission antenna unit 160 arranged to face the first antenna unit 110.

Specifically, Figure 28(a) shows that signals radiating through a plurality of second transmission patterns 162 are connected to the first transmission pattern 161 to have the same phase difference, and Figure 28(b) shows a plurality of signals radiating through the second transmission patterns 162. It shows that each signal radiated through the second transmission pattern 162 is connected to the first transmission pattern 161 so as to have different phase differences.

Each of the plurality of second transmission patterns 162 may be connected to one point of the first transmission pattern 161. Each of the plurality of second transmission patterns 162 may be connected to a different point of the first transmission pattern 161 . Some of the plurality of second transmission patterns 162 may be connected to one point of the first transmission pattern 161, and others may be connected to other points of the first transmission pattern 161. Each of the plurality of second transmission patterns 162 may penetrate a plurality of layers constituting the second substrate 2001 and 2002 and be connected to a point of the first transmission pattern 161. The length of the line connecting the plurality of second transparent patterns 162 and the first transparent pattern 161 may vary depending on the diversity of points and arrangements penetrating the plurality of layers.

Referring to FIG. 28(a), each of the plurality of second transmission patterns 162 may be connected to the center portion of the first transmission pattern 161. Each of the plurality of second transmission patterns 162 may be connected to the first transmission pattern 161 through lines having different lengths. Here, the lines connecting the plurality of second transmission patterns 162 and the first transmission pattern 161 have different lengths, but the signals transmitted through the plurality of second transmission patterns 162 may have the same phase difference. there is. For example, signals transmitted through the x1 line, y1 line, and z1 line having different lengths may have the same phase difference.

Referring to FIG. 28(b), each of the plurality of second transmission patterns 162 may be connected to a portion adjacent to one side of the first transmission pattern 161 based on the center portion. Each of the plurality of second transmission patterns 162 may be connected to the first transmission pattern 161 through lines having different lengths. Here, the plurality of second transmission patterns 162 and the first transmission pattern 161 may have different lengths connecting each other, and signals transmitted through the plurality of second transmission patterns 162 may have different phase differences. there is. For example, in Figure 18(b), the phase difference of the signal passing through the x2 line may be 0 degrees, the phase difference of the signal passing through the y2 line may be 15 degrees, and the phase difference of the signal passing through the z2 line may be 30 degrees. And, the phase difference of the signal passing through the p2 line may be 45 degrees, and the phase difference of the signal passing through the q2 line may be 60 degrees.

If the phase difference of the signal radiated through the transmission antenna units 160 and 170 changes, signal delay occurs, and through this, the steering beam angle can be adjusted. Through the phase difference design of the signal, the radiation signal can be steered in various directions, such as the top direction, the side direction, and the bottom direction, based on the first substrate 1000. Depending on the length of the line connecting the plurality of second transmission patterns 162 and 172 and the first transmission patterns 161 and 171, the phase difference of the radiation signal may vary and may have directivity. The length of the line connecting the plurality of second transmission patterns 162 and 172 and the first transmission patterns 161 and 171 may be designed differently depending on where the communication device 100 in the vehicle is placed. For example, when the communication device 100 is placed on the left side of the vehicle, the transmission antenna unit may be designed to have an optimal phase difference in order to have left directivity.

The communication device 100 may additionally include a phase shift converter to actively convert the phase difference of the signal. Through this, the angle of the radiation signal can be adjusted even after installation of the in-vehicle communication device 100. The phase difference converter may communicate with the communication module 200 and the EVCC component to convert the phase difference of the radiation signal passing through the second transmission patterns 162 and 172.

When applying MIMO (Multiple-Input Multipl-Output) antennas, if signal interference between adjacent antennas is severe, the accuracy of signals radiated and received from each antenna may be reduced. Accordingly, a design is needed to optimize the 'correlation coefficient (ECC, Envelope Correlation Coefficient)', which represents the 'isolation' between antennas and the radiation pattern interference of adjacent antennas.

The antenna units 110 and 120, which are MIMO antennas, are disposed at the edge area of the first substrate 1000 in consideration of the relationship with the EVCC component and the communication module 200 in the communication device 100. Since the MIMO antenna is placed within the communication device 100, which is a limited space, the distance that can be separated between the antennas is limited. In addition, there is a problem of poor isolation performance between antennas in 2.4 GHz, the frequency band of main communication signals, due to signal interference from electromagnetic fields generated inside the communication device 100 and signal interference from radiation signals between antennas.

Signals and electromagnetic fields that become noise in the antenna's communication signal have the property of flowing along the edge of the substrate. Therefore, the intensity of the noise signal can be reduced by increasing the edge portion by adding a fill cut portion on the substrate.

The communication device 100 may include a peel cut portion disposed between the first antenna portion 110 and the second antenna portion 120. The fill cut portion may be disposed in the second area 1200 of the first substrate 1000. The fill-cut portion may include a first fill-cut portion 310 disposed to face one side of the communication module 200 and a second fill-cut portion 320 disposed to face the other side of the communication module 200. A communication module 200 may be disposed between the first fill-cut unit 310 and the second fill-cut unit 320.

The first fill-cut portion 310 and the second fill-cut portion 320 may be formed in a line shape. The first fill-cut portion 310 and the second fill-cut portion 320 may be formed in different shapes. The first fill cut portion 310 may be formed in a line shape that is shorter than the second fill cut portion 320. The first fill-cut portion 310 and the second fill-cut portion 320 may be arranged parallel to each other. The first fill cut portion 310 may be formed as a line-shaped hole in the second region 1200 of the first substrate 1000. The first fill cut portion 310 may not be connected to the first area 1100. The second fill cut portion 320 may be connected to the first area 1100. The second fill cut portion 320 may be formed in the shape of a line connecting the area where the first antenna unit 110 is placed and the area where the second antenna unit 120 is placed. The second fill cut portion 320 may be formed in the shape of a line connecting the two first regions 1100 that are spaced apart from each other. The second fill cut unit 320 may spatially separate the third area in which the communication module 200 is placed and the fourth area in which EVCC components are placed in the second area 1200.

The first fill cut portion 310 may include a ground matching circuit 311 disposed in the center portion. The ground matching circuit 311 may be arranged to be spaced apart from the first antenna unit 110 and the second antenna unit 120 at the same distance. The ground matching circuit 311 may be arranged to face the side of the communication module 200. The ground matching circuit 311 may be arranged to be spaced apart from the Wi-Fi communication device 100. The second area 1200 may be arranged to be spaced apart from the edge area of the first substrate 1000. A fill-cut area may be formed between the second area 1200 and the edge area of the first substrate 1000. The ground matching circuit 311 may be connected to the peel cut area between the second area 1200 and the edge area of the first substrate 1000.

Referring to FIG. 29, the ground matching circuit 311 may be a circuit in which a power source and a plurality of elements are connected in parallel. The ground matching circuit 311 includes an RS resistor connected in series with the power supply, an L2 inductor connected in series with the RS resistor, a C1 capacitor connected to the branch node of the RS resistor and the L2 inductor, an RL resistor connected in series with the L2 inductor, It may include a C3 capacitor connected to the branch node of the L2 inductor and the RL resistor. In the ground matching circuit 311, the RS resistor and C1 capacitor can function as a first filter, the L2 inductor and C3 capacitor can function as a second filter, and the RL resistor can function as a third filter.

The ground matching circuit 311 may operate as a band-stop filter that does not pass only frequencies in a specific band. The electric field induced from the first antenna unit 110 to the second antenna unit 120 and the electric field induced from the second antenna unit 120 to the first antenna unit 110 are induced to the ground matching circuit 311. Isolation between antennas can be improved.

The values of the power source and a plurality of elements forming the ground matching circuit 311 may be designed to filter out noise of a specific frequency. The values of the power source and the plurality of elements forming the ground matching circuit 311 may be designed to filter out noise corresponding to the main frequency of the signal used for internal and external communication of the communication device 100. Signals used for internal and external communication in the communication device 100 may use at least one frequency of 2.4 GHz and 5 GHz.

The influence of noise corresponding to the main frequency can be minimized through the ground matching circuit 311. Noise corresponding to the main frequency generated in the first antenna unit 110 is filtered and grounded through the ground matching circuit 311, so that the influence on the second antenna unit 120 can be minimized. Noise corresponding to the main frequency generated in the second antenna unit 120 is filtered and grounded through the ground matching circuit 311, so that the influence on the first antenna unit 110 can be minimized.

Figure 30 shows the electric field intensity distributed on the substrate of the wireless communication module at a frequency of 2.4 GHz. Specifically, Figure 30(a) shows the electric field intensity generated on the substrate of a wireless communication module not including a fill-cut portion, and Figure 30(b) illustrates the electric field intensity generated on the substrate of a wireless communication module including a feel-cut portion. It is shown. Referring to FIG. 30(a), a strong electric field is formed in the edge portion of the substrate and the two antennas spaced apart from each other. On the other hand, referring to FIG. 30(b), it can be seen that the electric field is distributed in the area adjacent to the peel cut portion, and the electric field intensity distributed to the antenna is weak compared to FIG. 30(a).

Those skilled in the art related to the present embodiment will understand that the above-described substrate can be implemented in a modified form without departing from the essential characteristics. Therefore, the disclosed methods should be considered from an explanatory rather than a restrictive perspective. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

Claims (8)

Electric Vehicle Supply Equipment (EVSE), Electric Vehicle Communication Controller (EVCC), and NFC module that transmits and receives signals with mobile terminals; and
A communication device comprising a control module that transmits a control signal to the EVSE and the EVCC using a signal received from the mobile terminal. According to paragraph 1,
The NFC module is
When the charging gun of the EVSE is mounted on the vehicle, a vehicle recognition signal is transmitted to the mobile terminal,
A communication device that transmits a vehicle charging payment signal to the EVSE and the mobile terminal upon receiving a vehicle charging completion signal from the EVCC. According to paragraph 1,
The NFC module transmits and receives signals about the vehicle charging state between the EVSE and the EVCC,
A communication device wherein the signal about the vehicle charging state includes at least one of charging speed, charging charge, charging amount, and remaining charging time. According to paragraph 1,
The control module of the communication device is formed independently from the control module of the EVCC. A first communication module that transmits and receives signals with EVSE (Electric Vehicle Supply Equipment);
A second communication module that transmits and receives signals with an EVCC (Electric Vehicle Communication Controller);
A third communication module for transmitting and receiving signals with a mobile terminal; and
A control module connected to the first to third communication modules and generating a control signal to the EVSE and EVCC using a signal received from the third communication module,
A communication device wherein the first communication module and the third communication module are NFC modules. According to clause 5,
The protocol performed through the second communication module is a communication device that uses the CAN (Controller Area Network) protocol. In a communication method for controlling vehicle charging by transmitting and receiving signals with EVSE, EVCC, and mobile terminals,
transmitting a signal to switch the EVCC from a sleep mode to a ready mode upon receiving a vehicle entry signal from the EVSE;
When the charging gun of the EVSE is mounted on a vehicle, transmitting a vehicle recognition signal to the mobile terminal and transmitting a signal to switch the EVCC from ready mode to charging mode;
Transmitting a signal about the vehicle charging state received from the EVCC to the EVSE and the mobile terminal; and
Upon receiving a vehicle charging completion signal from the EVCC, transmitting a vehicle charging payment signal to the EVSE and the mobile terminal,
A communication method using NFC communication for signal transmission and reception with the EVSE and with the mobile terminal. In clause 7,
A communication method wherein the signal about the vehicle charging state includes at least one of charging speed, charging charge, charging amount, and remaining charging time.

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