KR20250008312A - Antenna apparatus and vehicl including the same - Google Patents

Abstract

The present invention relates to an antenna device and a vehicle, and a vehicle according to the present invention comprises: a roof; glass arranged adjacent to the roof and at least a portion of which is formed to be inclined with respect to the roof; and an antenna device arranged below the roof and the glass so as to overlap the roof and the glass, the antenna device including a plurality of antennas, at least one of the plurality of antennas being arranged to be inclined with respect to the roof in correspondence with the glass.

Description

{ANTENNA APPARATUS AND VEHICL INCLUDING THE SAME}

The present invention relates to an antenna device and a vehicle including the same, and more particularly, to an antenna device capable of minimizing interference between antennas while optimizing performance, and a vehicle including the same.

The demand for various communication services and multimedia services for vehicles is increasing. With the development of autonomous vehicles, the need for communication technology that enables continuous communication with roadside infrastructure and vehicles, and exchange or share information on traffic conditions is also increasing.

Recently, in order to secure design excellence of vehicles, antenna devices that can be installed inside vehicles are being developed. Antenna devices installed inside vehicles may have lower reception rates due to interference from the vehicle body compared to when installed outside the vehicle, and thus their performance may be degraded.

An embodiment of the present invention seeks to provide an antenna device capable of optimizing performance and a vehicle including the same.

Another embodiment of the present invention is to provide an antenna device capable of minimizing interference between antennas and a vehicle including the same.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A vehicle according to an embodiment of the present invention comprises a roof; glass disposed adjacent to the roof and at least a portion of which is formed to be inclined with respect to the roof; and an antenna device disposed below the roof and the glass so as to overlap the roof and the glass, the antenna device including a plurality of antennas, at least one of the plurality of antennas being disposed to be inclined with respect to the roof and corresponding to the glass.

In one embodiment, the antenna device includes at least one circuit board on which the plurality of antennas are mounted; a case that provides a receiving space for accommodating the plurality of antennas and the at least one circuit board, and the case may include a first case that is in close contact with the glass; and a second case that faces the first case to provide a receiving space for accommodating the plurality of antennas.

In one embodiment, the plurality of antennas include a first antenna, a second antenna, a third antenna, a fourth antenna, and a fifth antenna, wherein one of the first antenna, the second antenna, the third antenna, the fourth antenna, and the fifth antenna may be a pole-shaped antenna, and the rest of the first antenna, the second antenna, the third antenna, the fourth antenna, and the fifth antenna may be patch-shaped antennas that radiate signals of different frequency bands.

In one embodiment, the first antenna can receive a radio broadcast signal, the second antenna can receive a signal in a DMB band, the third antenna and the fourth antenna can receive a signal in an LTE band, and the fifth antenna can receive a GNSS signal.

In one embodiment, the first antenna has at least one helical region and at least one straight region alternately arranged, and the at least one straight region can face the fifth circuit board while being spaced apart from it.

In one embodiment, the fifth antenna may be positioned between the third antenna and the fourth antenna.

In one embodiment, the at least one circuit board includes a first circuit board electrically connected to the first antenna; a second circuit board on which the second antenna is mounted; a third circuit board on which the third antenna is mounted; a fourth circuit board on which the fourth antenna is mounted; and a fifth circuit board on which the fifth antenna is mounted, wherein the second to fifth circuit boards can be arranged at an angle with respect to the loop.

In one embodiment, the first circuit board may be positioned closer to the loop than the first antenna.

In one embodiment, the ground of at least one of the second circuit board, the third circuit board, or the fourth circuit board may be positioned closer to the glass than at least one of the second antenna, the third antenna, or the fourth antenna.

In one embodiment, the fifth antenna may be positioned closer to the glass than to the ground of the fifth circuit board.

In one embodiment, the vehicle further includes a head lining disposed within the vehicle spaced apart from the roof, the glass including a black area disposed adjacent to the roof, and the antenna may be disposed between the black area and the head lining.

In one embodiment, the vehicle further includes a fixing point of a sun visor disposed inside the vehicle, the glass being a windshield glass of the vehicle, and the case can be formed in a streamlined shape so as to be spaced apart from the fixing point of the sun visor.

In one embodiment, the case includes a first side facing the windshield glass; and a second side facing the roof, wherein the second side can be formed to be closer to the first side in an area corresponding to the fixed point than in an area not corresponding to the fixed point.

In one embodiment, the vehicle further comprises a front rail mounted on a lower front end of the roof, the second case comprises a plurality of brackets coupled with the front rail and protruding toward the outside of the second case, one of the plurality of brackets comprises a mounting hole coupled with a center clip of the front rail, and another of the plurality of brackets comprises a mounting hole coupled to the front rail via a fastening bolt.

According to another embodiment of the present invention, an antenna device comprises: a first case; a second case arranged to face the first case and to provide an accommodation space; at least one circuit board arranged on the second case; and a plurality of antennas arranged on the at least one circuit board; and at least one of the plurality of antennas can be arranged to be inclined with respect to the second case.

The present technology can optimize antenna performance while minimizing mutual interference between multiple antennas included in an antenna device.

This technology can maintain a vehicle's design-wise superior exterior appearance by installing an antenna device inside the vehicle.

In addition, various effects may be provided that are directly or indirectly identified through this document.

FIG. 1 is a perspective view showing a vehicle according to one embodiment of the present invention.
FIG. 2a is a perspective view showing a vehicle antenna device according to an embodiment of the present invention, FIG. 2b is an exploded perspective view showing a vehicle antenna device according to an embodiment of the present invention, FIG. 2c is a drawing showing a vehicle antenna device according to an embodiment of the present invention with a first case thereof omitted, and FIG. 2d is an exploded side view of a vehicle antenna device according to an embodiment of the present invention.
FIG. 3 is a perspective view illustrating in detail an antenna assembly of a vehicle antenna device according to one embodiment of the present invention.
FIG. 4 is a drawing showing the first circuit board and the first antenna illustrated in FIG. 3.
FIG. 5a is a perspective view showing a vehicle equipped with a vehicle antenna device according to an embodiment of the present invention, and FIG. 5b is a cross-sectional view showing a vehicle equipped with a vehicle antenna device according to an embodiment of the present invention.
FIGS. 6A and 6B are drawings showing a first assembly process of a vehicle antenna device according to one embodiment of the present invention.
FIGS. 7A and 7B are drawings showing a second assembly process of a vehicle antenna device according to one embodiment of the present invention.
FIG. 8 is a drawing showing the interior of a vehicle equipped with a vehicle antenna device according to one embodiment of the present invention.
FIGS. 9A and 9B are drawings for explaining radio signals transmitted and received through a vehicle antenna device according to a comparative example.
FIGS. 10A and 10B are drawings for explaining radio signals transmitted and received through a vehicle antenna device according to one embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When adding reference numerals to components in each drawing, it should be noted that the same components are given the same numerals as much as possible even if they are shown in different drawings. In addition, when describing embodiments of the present invention, if it is determined that a specific description of a related known configuration or function hinders understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by these terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person having ordinary skill in the art to which the present invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealistic or overly formal sense, unless explicitly defined in this application.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 10b.

FIG. 1 is a perspective view showing a vehicle according to one embodiment of the present invention.

Referring to FIG. 1, at least one antenna device (110) may be installed inside the vehicle. The antenna device (110) may receive information necessary for users of the vehicle (1), such as road traffic information, radio broadcasts, or vehicle location information, and may transmit road traffic information necessary for autonomous driving of the vehicle (1), from an external device (not shown) or to an external device.

The antenna device (110) may support various communication protocols. For example, the wireless communication may include cellular communication using at least one of LTE, LTE Advance (LTEA), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), Wireless Broadband (WiBro), or Global System for Mobile Communications (GSM). For example, the wireless communication may include at least one of WiFi (wireless fidelity), Bluetooth, Bluetooth low energy (BLE), Zigbee, near field communication (NFC), Magnetic Secure Transmission, radio frequency (RF), or body area network (BAN). According to one embodiment, the wireless communication may include GNSS. GNSS may be, for example, GPS (Global Positioning System), Glonass (Global Navigation Satellite System), Beidou Navigation Satellite System ("Beidou"), or Galileo, the European global satellite-based navigation system. Hereinafter, in the present disclosure, "GPS" may be used interchangeably with "GNSS". The external device (not shown) may be a communication device capable of transmitting and receiving signals, such as a base station, a broadcasting device, a radio broadcasting device, a satellite signal transmitting and receiving device (e.g., GPS), or a user terminal. In addition, the external device may be a communication device that supports V2X (vehicle to everything) communication. In addition, the external device may include various devices capable of transmitting and receiving signals through wireless communication or wired communication.

The antenna device (110) may be arranged between at least one of the front glass (11), the side glass (12), or the rear glass (13) of the vehicle and the roof (20) of the vehicle (1). For example, a part of the antenna device (110) may be arranged under the roof (20) of the vehicle (1), and the remaining part of the antenna device (110) may be arranged under at least one of the front glass (11), the side glass (12), or the rear glass (13) of the vehicle (1). For example, the antenna device (110) may be arranged on at least one side (e.g., both sides) with respect to the inside mirror (15).

FIG. 2a is a perspective view showing a vehicle antenna device according to an embodiment of the present invention, FIG. 2b is an exploded perspective view showing a vehicle antenna device according to an embodiment of the present invention, FIG. 2c is a drawing showing a vehicle antenna device according to an embodiment of the present invention with a first case thereof omitted, and FIG. 2d is an exploded side view of a vehicle antenna device according to an embodiment of the present invention.

Referring to FIGS. 2A to 2D, the antenna device (110) may include a case (120) and an antenna assembly (200).

The case (120) may form the outer surface of the antenna device (110). The case may include a first case (121) and a second case (122).

At least a portion of the first case (121) may be formed to overlap with the glass of the vehicle. One side of the first case (121) may be in close contact with the glass of the vehicle. At least a portion of one side of the first case (121) may have an inclination corresponding to an inclination of the glass of the vehicle. At least a portion of the first case (121) may be formed of a plastic polymer compound for radiation of electromagnetic waves.

The second case (122) can be combined with the first case (121) to provide an accommodation space (124) in which the antenna assembly (200) can be accommodated. The antenna assembly (200) placed within the accommodation space (124) can be protected from external impact and environmental factors (e.g., moisture and/or foreign substances) through the case (120).

A plurality of guide pins (125) may be arranged in the receiving space (124) of the second case (122). Each of the plurality of guide pins (125) may protrude in a third direction (D3) toward the first case (121). The plurality of guide pins (124) may be coupled with guide holes (215) of the circuit board of the antenna assembly (200) to secure the antenna assembly (200) to the second case (122).

The second case (122) may include at least one bracket (130) extending in a second direction (D2) toward the roof (20) of the vehicle. The at least one bracket (130) may protrude in the second direction (D2) more than the first case (121). When a plurality of at least one bracket (123) are provided, adjacent brackets (130) may be arranged to be spaced apart from each other in the first direction (D1). The at least one bracket (130) may be arranged to overlap the roof (20). The antenna device (110) may be fixed to the vehicle (1) through the bracket (130). One of the plurality of brackets (130) may include a mounting hole (610), and another of the plurality of brackets may include a mounting hole (620). The mounting hole (610) may be opened in the second direction (D2), which is a protruding direction of the bracket.

The antenna assembly (200) may include a plurality of antennas accommodated in the accommodation space (124). The plurality of antennas may include a first antenna (210), a second antenna (220), a third antenna (230), a fourth antenna (240), and a fifth antenna (250).

According to one embodiment, any one of the first antenna (210), the second antenna (220), the third antenna (230), the fourth antenna (240), and the fifth antenna (250) may be formed as a pole-shaped antenna. The remaining ones of the first antenna (210), the second antenna (220), the third antenna (230), the fourth antenna (240), and the fifth antenna (250) may be patch-shaped antennas that radiate signals of different frequency bands.

According to one embodiment, the first antenna (210) may be a radio antenna operating in an AM broadcast frequency band (500 kHz to 1.7 MHz) and an FM broadcast frequency band (88 MHz to 108 MHz). As an example, the first antenna may be a passive antenna of a monopole type that does not include an internal amplifier circuit.

The second antenna (220) may be a DAB ((DMB) antenna operating in any one of the frequency bands of the 174 MHz to 216 MHz band of Band-² terrestrial DMB), the European DAB (Digital Audio Broadcasting), and the 1452 to 1492 MHz band of the L-band band (satellite DMB).

At least one of the third antenna (230) or the fourth antenna (240) may be an LTE (5G) antenna operating in a 5G frequency band (690 MHz to 960 MHz, 1710 MHz to 2690 MHz, and 3.2 GHz to 4.8 GHz).

The fifth antenna (250) may include a GNSS (GPS) antenna operating in a frequency band such as GPS (e.g., 1575.42 MHz, 1227.60 MHz), Galileo (e.g., 1575.42 MHz), GLONASS (e.g., 1602 MHz), Beidou (e.g., 1561.096 MHz), etc.

According to one embodiment, at least one of the first antenna (210), the second antenna (220), the third antenna (230), the fourth antenna (240), and the fifth antenna (250) may be arranged to be inclined with respect to the second case (122).

FIG. 3 is a perspective view illustrating in detail an antenna assembly of a vehicle antenna device according to one embodiment of the present invention.

Referring to FIG. 3, the antenna assembly (200) may include a plurality of antennas (210, 220, 230, 240, 250). The plurality of antennas (210, 220, 230, 240, 250) may be mounted on at least one circuit board (212, 222, 232, 242, 252). For example, the at least one circuit board (212, 222, 232, 242, 252) may include a first circuit board (212), a second circuit board (222), a third circuit board (232), a fourth circuit board (242), and a fifth circuit board (252). At least one of the first circuit board (212), the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) may be arranged along the shape of the front glass of the vehicle. At least one of the first circuit board (212), the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) may be arranged to be inclined with respect to the ground (or the road) along the windshield of the vehicle. For example, at least a portion of the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) may be arranged to be inclined with respect to the ground (or the road) along the windshield of the vehicle (e.g., the windshield (11) of FIG. 1). The first circuit board (212) may be arranged to be parallel to the ground and face a direction (+Z) perpendicular to the ground.

According to one embodiment, the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) can be tilted at the same inclination.

According to one embodiment, at least one of the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) may be inclined at a different incline from the remaining circuit boards. For example, the fifth circuit board (252) may be inclined at a different incline from the second circuit board (222), the third circuit board (232), and the fourth circuit board (242). For example, the fifth circuit board (252) may be inclined at a gentler incline than the second circuit board (222), the third circuit board (232), and the fourth circuit board (242).

According to one embodiment, at least one of the first circuit board (212), the second circuit board (222), the third circuit board (232), the fourth circuit board (242), and the fifth circuit board (252) may include a low noise amplifier (LNA).

The plurality of antennas may include a first antenna (210), a second antenna (220), a third antenna (230), a fourth antenna (240), and a fifth antenna (250).

The first antenna (210) may include at least one helical region (211) and at least one straight region (213) that are alternately arranged. The first antenna (210) including the helical region (211) and the straight region (213) may obtain resonance characteristics of a radio frequency band. Since the helical region (211) has an inductance component, it may form high impedance at a high frequency, thereby minimizing interference on the radiation characteristics of the third antenna (230) and the fourth antenna (240). The straight region (213) may be arranged to face the fifth antenna (250) and the fifth circuit board (252) while being spaced apart from each other. The straight region (213) may be arranged at a large distance from the fifth circuit board (252), thereby minimizing interference effects of the fifth circuit board (252) on the first antenna (210).

The first antenna (210) may be positioned at the farthest distance from the loop (20) than other antennas (220, 230, 340, 250) positioned in the receiving space of the second case (122). The first antenna (210) may be positioned in a glass area at the bottom of the case (120). The first antenna (210) may include a connector (217). The first antenna (210) may be electrically connected to the first circuit board (212) through the connector (217). The first circuit board (212) may be positioned close to the loop (20) so as not to interfere with the radiation of the first antenna (210), as illustrated in FIG. 4.

The second antenna (220) may be mounted on the second circuit board (222). For example, the second antenna (220) may be formed in a capacitive top loading structure by attaching a metal plate (225) to an edge portion of the second antenna (220).

The second antenna (220) may be placed on the first surface (223) of the second circuit board (222) that is inclined at a predetermined angle with respect to the ground. The second antenna (220) may be installed so as to face in a direction opposite to the third direction (D3) toward the front glass.

The second surface (224) facing in the opposite direction to the first surface (223) of the second circuit board (222) can be arranged to face a third direction (D3) toward the front glass of the vehicle.

The second antenna (220) on which the second circuit board (222) is placed on the first surface (223) can be placed farther from the loop (20) than the ground of the second circuit board (222). Accordingly, since the loop (20) does not affect radiation in the horizontal direction, the radiation characteristics of the second antenna (220) in the horizontal direction can be improved.

The ground of the second circuit board (222) may be positioned higher than the second antenna (220). The ground of the second circuit board (222) may be positioned closer to the front glass of the vehicle than the second antenna (220).

A portion of the second circuit board (222) may be positioned close to the loop (20). A portion of the second circuit board (222), excluding the portion where the second antenna (220) is mounted, may be positioned close to the loop (20). A portion of the second circuit board (222) may be positioned close to the loop (20) so that horizontal radiation of antennas (210, 230, 240, 250) of a different band from the second antenna (220) is not interfered with.

The third antenna (230) may be mounted on the third circuit board (232). The third antenna (230) may be placed on the first surface (233) of the third circuit board (232) that is inclined at a predetermined angle with respect to the ground. The third antenna (230) may be installed so as to face a third direction (D3_) opposite to the front glass toward the front glass. The second surface (234) of the third circuit board (232) that faces the opposite direction to the first surface (233) may be placed so as to face the third direction (D3) toward the front glass of the vehicle.

The ground of the third circuit board (232) may be arranged above the third antenna (230). The ground of the third circuit board (232) may be arranged closer to the front glass of the vehicle than the third antenna (230). The third antenna (230), in which the third circuit board (242) is arranged on the first surface (233), may be arranged farther from the loop (20) than the ground of the third circuit board (232). Accordingly, since the loop (20) does not affect the radiation in the horizontal direction, the radiation characteristics of the third antenna (230) in the horizontal direction may be improved.

The fourth antenna (240) may be mounted on the fourth circuit board (242). The fourth antenna (240) may be placed on the first surface (243) of the fourth circuit board (242) that is inclined at a predetermined angle with respect to the ground. The fourth antenna (240) may be installed so as to face in a direction opposite to the third direction toward the front glass. The second surface (244) of the fourth circuit board (242), which faces in the opposite direction to the first surface (243), may be placed so as to face in the third direction (D3) toward the front glass of the vehicle.

The ground of the fourth circuit board (242) may be arranged above the fourth antenna (240). The ground of the fourth circuit board (242) may be arranged closer to the front glass of the vehicle than the fourth antenna (240). The fourth antenna (240), in which the fourth circuit board (242) is arranged on the first surface (243), may be arranged farther from the loop (20) than the ground of the fourth circuit board (242). Accordingly, since the loop (20) does not affect the radiation in the horizontal direction, the radiation characteristics of the fourth antenna (240) in the horizontal direction may be improved.

The third antenna (230) and the fourth antenna (240) may be LTE antennas operating in a 5G frequency band. The antenna device may operate in a dual frequency band included in the 5G frequency band by using a plurality of radiators including the third antenna (230) and the fourth antenna (240).

According to one embodiment, a fifth antenna (250) is installed between the third antenna (230) and the fourth antenna (240), thereby ensuring isolation of the third antenna (230) and the fourth antenna (240) that use the same frequency simultaneously.

According to one embodiment, at least one of the third antenna (230) or the fourth antenna (240) may include a band-stop filter. The band-stop filter may be installed on the third circuit board (232) and the fourth circuit board (242) instead of the third antenna (230) or the fourth antenna (240). The band-stop filter may block interference with signals in the frequency band of the first antenna (210).

The fifth antenna (250) may be mounted on the fifth circuit board (252). The fifth antenna (250) may be positioned between the third antenna (230) and the fourth antenna (240). The fifth antenna (250) may be positioned on the first surface (254) of the second circuit board (252) that is inclined at a predetermined angle with respect to the ground. The fifth antenna (250) may form a radiation pattern in the sky direction (e.g., +Z axis) to receive satellite signals. To this end, the fifth antenna (250) may be installed to face the third direction (D3) toward the front glass.

The second side (254) facing the opposite direction to the first side (253) of the fifth circuit board (252) may be arranged to face the opposite direction to the third direction (D3) facing the front glass of the vehicle. The fifth antenna (250) on which the fifth circuit board (252) is arranged on the first side (253) may be arranged above the ground of the fifth circuit board (252). The fifth antenna (250) may be arranged closer to the front glass of the vehicle than the ground of the fifth circuit board (252). Since the loop (20) does not affect the radiation in the sky direction (+Z axis), the satellite signal reception sensitivity of the fifth antenna (250) may be maintained.

FIG. 5a is a perspective view showing a vehicle equipped with a vehicle antenna device according to an embodiment of the present invention, and FIG. 5b is a cross-sectional view showing a vehicle equipped with a vehicle antenna device according to an embodiment of the present invention.

Referring to FIGS. 5a and 5b, the vehicle (1) may include a front glass (11) and an antenna device (110).

The front glass (11) may be installed at the front end of the roof (2) and provided at the upper front side of the vehicle (1). The front glass (11) protects the passengers inside the vehicle (1) while allowing the passengers inside the vehicle (1) to obtain visual information about the front of the vehicle (1), and is also called a windshield glass. The front glass (11) may include a black area (510) provided at a portion adjacent to the front end of the roof (20).

The antenna device (110) overlaps with the black area (510) of the front glass (11) provided adjacent to the front end of the loop (20), thereby preventing the antenna device (110) from being exposed to the outside.

The antenna device (110) may be placed in a space between each of a portion of the roof (20) and the front glass (11) and the head lining (530). The head lining (530) may be placed spaced apart from each of a portion of the roof (20) and the front glass (11). The antenna device (110) may be prevented from being exposed to the interior of the vehicle by being covered by the head lining (530) attached to the roof (20).

The antenna device (110) can be fixed to a front rail (520) positioned at the bottom of the loop (20) to reinforce the rigidity of the loop.

FIGS. 6A and 6B are drawings showing a first assembly process of a vehicle antenna device according to an embodiment of the present invention, and FIGS. 7A and 7B are drawings showing a second assembly process of a vehicle antenna device according to an embodiment of the present invention.

Referring to FIGS. 6A and 6B, the mounting hole (610) of the bracket (130) of the antenna device (110) can be aligned with the center clip (720) of the front rail (520). The mounting hole (610) can be formed to penetrate the bracket (130) toward the center clip (720). The mounting hole (610) can be formed to penetrate the bracket (130) toward the front rail (520). The mounting hole (610) can correspond one-to-one with the center clip (720). The antenna device (110) can be mounted on the front rail (520) by the mounting hole (610) of the bracket (130) being fitted into the center clip (720) of the front rail (520).

Referring to FIGS. 7A and 7B, a fastening bolt (720) may be inserted into a fastening hole (620) of a bracket (130). The fastening hole (620) of the bracket (130) may be formed to penetrate the bracket (130) toward the front rail (520). At least one fastening hole (620) of the bracket (130) may be arranged on each of the left and right sides of the mounting hole (610). The front rail (520) may have a joining hole (not shown) formed in an area corresponding to the fastening hole (620) of the bracket (130). The fastening bolt (720) may be inserted into the fastening hole (620) of the bracket (130) and the joining hole of the front rail (520). The fastening hole (620) of the bracket (130) and the joining hole of the front rail (520) are fastened through a fastening bolt (720), so that both sides of the bracket (130) of the antenna device (110) can be fixed to the front rail (520).

According to one embodiment, the antenna device (110) may be electrically connected through a front rail (520) made of a conductive material and a fastening bolt (720) made of a conductive material. The front rail (520) may provide a ground to a circuit board (e.g., circuit boards (212, 222, 232, 242) of FIG. 3) within the antenna device (110) through the fastening bolt (720).

FIG. 8 is a drawing showing the interior of a vehicle equipped with a vehicle antenna device according to one embodiment of the present invention.

Referring to FIG. 8, the bracket (130) of the antenna device (110) can be fixed to the front rail (520) via a fastening bolt. A part of the antenna device (110) fixed to the front rail (520) can overlap with the front glass (11).

The antenna device (110) may be formed in various shapes to avoid interference with components placed inside the vehicle. For example, the antenna device (110) may be formed to avoid interference with a fixing point (810) of a sun visor placed inside the vehicle. The second side (112) of the case (110) facing the roof (20) may be formed in a streamlined shape to avoid interference with the fixing point (810) of the sun visor. The second side (112) of the case (110) may be formed to be closer to the first side (111) in an area corresponding to the fixing point (810) than in an area not corresponding to the fixing point (810).

FIGS. 9A and 9B are drawings for explaining radio signals transmitted and received through a vehicle antenna device according to a comparative example, and FIGS. 10A and 10B are drawings for explaining radio signals transmitted and received through a vehicle antenna device according to an embodiment of the present invention.

The vehicle antenna device (900) according to the comparative example illustrated in FIGS. 9A and 9B may be arranged parallel to at least one of the ground and the loop (20). The vehicle antenna device (900) according to the comparative example may radiate a radio signal in a direction (+Z) perpendicular to the loop (20) through a radiator arranged parallel to the ground. Since the radiation pattern of the vehicle antenna device (900) according to the comparative example is formed in a direction (+Z) perpendicular to the loop (20), a loss of the radio signal may occur due to the loop (20).

On the other hand, the vehicle antenna device (1000) according to the embodiment illustrated in FIGS. 10A and 10B may be arranged parallel to the front glass (11). The front glass (11) may be arranged to be inclined with respect to the ground (or road) and a plane perpendicular to the ground. When the antenna device is arranged on the front glass (11) inclined with respect to the ground, the antenna device (1000) may have a radiation pattern that is obliquely oriented upwardly and/or downwardly. For example, the antenna device (1000) according to the embodiment may have a radiation pattern that radiates in a direction (D3) perpendicular to the front glass (11) inclined with respect to the ground. Since the radiation pattern of the antenna device (1000) according to the embodiment is formed in a direction perpendicular to the front glass (11), interference effects of radio signals due to the loop (20) may be minimized.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art will appreciate that various modifications and variations may be made without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the rights of the present invention.

Claims (15)

Loop and;
A glass disposed adjacent to the above loop and having at least a portion formed to be inclined with respect to the above loop;
An antenna device including a plurality of antennas, which is disposed below the loop and the glass so as to overlap with the loop and the glass,
A vehicle wherein at least one of the plurality of antennas is arranged at an angle relative to the roof and corresponding to the glass. In paragraph 1,
The above antenna device
At least one circuit board on which the plurality of antennas are mounted;
A case comprising a receiving space for receiving the plurality of antennas and the at least one circuit board,
The above case is
A first case that is in close contact with the above glass;
A vehicle including a second case facing the first case to provide a receiving space for receiving the plurality of antennas. In the second paragraph,
The above plurality of antennas include a first antenna, a second antenna, a third antenna, a fourth antenna, and a fifth antenna,
Any one of the first antenna, the second antenna, the third antenna, the fourth antenna and the fifth antenna is a pole-shaped antenna,
A vehicle, wherein the remaining first antenna, second antenna, third antenna, fourth antenna and fifth antenna are patch-shaped antennas that radiate signals of different frequency bands. In the third paragraph,
The above first antenna receives a radio broadcast signal,
The above second antenna receives signals in the DMB band,
The third antenna and the fourth antenna receive signals in the LTE band,
The fifth antenna is a vehicle that receives GNSS signals. In paragraph 4,
The above first antenna
At least one helical region and at least one straight region are arranged alternately,
A vehicle in which at least one straight area is spaced apart from the fifth circuit board. In paragraph 4,
A vehicle in which the fifth antenna is positioned between the third antenna and the fourth antenna. In paragraph 4,
At least one circuit board as above
A first circuit board electrically connected to the first antenna;
A second circuit board on which the second antenna is mounted;
A third circuit board on which the third antenna is mounted;
A fourth circuit board on which the fourth antenna is mounted;
It includes a fifth circuit board on which the fifth antenna is mounted,
A vehicle in which the second to fifth circuit boards are arranged at an angle with respect to the loop. In paragraph 7,
A vehicle wherein the first circuit board is positioned closer to the roof than the first antenna. In paragraph 7,
A vehicle wherein the ground of at least one of the second circuit board, the third circuit board, or the fourth circuit board is positioned closer to the glass than at least one of the second antenna, the third antenna, or the fourth antenna. In paragraph 7,
A vehicle in which the fifth antenna is positioned closer to the glass than the ground of the fifth circuit board. In paragraph 1,
Further comprising a head lining disposed apart from the roof within the vehicle,
The above glass includes a black area positioned adjacent to the above loop,
A vehicle wherein the antenna is positioned between the black area and the head lining. In the second paragraph,
It further includes a fixing point for a sun visor placed inside the vehicle,
The above glass is the windshield glass of the vehicle,
A vehicle in which the above case is formed in a streamlined shape so as to be spaced apart from the fixing point of the sun visor. In Article 12,
The above case is
A first side facing the windshield glass;
A second side facing the above loop is included,
A vehicle in which the second side is formed closer to the first side in an area corresponding to the fixed point than in an area not corresponding to the fixed point. In the second paragraph,
It further comprises a front rail mounted on the lower part of the front end of the above loop,
The second case above
It is coupled with the above front rail and includes a plurality of brackets protruding toward the outside of the second case,
Any one of the plurality of brackets includes a mounting hole that engages with a center clip of the front rail;
A vehicle wherein another one of said plurality of brackets includes a mounting hole for being attached to said front rail via a fastening bolt. Case 1;
A second case arranged to face the first case and provide an accommodation space;
At least one circuit board disposed on the second case;
Comprising a plurality of antennas arranged on at least one circuit board;
An antenna device wherein at least one of the plurality of antennas is arranged to be inclined with respect to the second case.

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