KR101718922B1 - Multi-Band Antenna for Vehicle - Google Patents

Multi-Band Antenna for Vehicle Download PDF

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Publication number
KR101718922B1
KR101718922B1 KR1020160028358A KR20160028358A KR101718922B1 KR 101718922 B1 KR101718922 B1 KR 101718922B1 KR 1020160028358 A KR1020160028358 A KR 1020160028358A KR 20160028358 A KR20160028358 A KR 20160028358A KR 101718922 B1 KR101718922 B1 KR 101718922B1
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KR
South Korea
Prior art keywords
antenna
helical
band
dual
top loading
Prior art date
Application number
KR1020160028358A
Other languages
Korean (ko)
Inventor
강기조
박태병
남상민
이창근
Original Assignee
위너콤 주식회사
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Priority to KR1020160028358A priority Critical patent/KR101718922B1/en
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Publication of KR101718922B1 publication Critical patent/KR101718922B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/36—Vertical arrangement of element with top loading

Abstract

The present invention relates to a multi-band antenna for a vehicle. The multi-band antenna for a vehicle comprises: a first dual helical antenna which extends from one end of a main board in a longitudinal direction of the main board, which is disposed in a direction perpendicular to a top surface of the main board, and which takes the form of a PCB; a first top loading antenna which is connected to an upper end of the first dual helical antenna so as to be parallel to the upper end of the first dual helical antenna, which is disposed in a longitudinal direction of the main board, and which is made of a conductor; a second dual helical antenna which takes the form of a PCB having an overall triangular shape, which is spaced apart from the first dual helical antenna by a predetermined interval, and which is formed in a transverse direction of the main board; and a second top loading antenna which includes a plurality of top loading parts and single mono helical antenna, connected so as to have a structure penetrating a PCB forming the second dual helical antenna in a direction perpendicular to a transverse direction of the PCB and formed so as to be adjacent to front and rear sides of the second top loading antenna relative to the second dual helical antenna, in an integrated manner. Accordingly, the multi-band antenna for a vehicle according to the present invention comprises a plurality of dual helical antennas, each taking the form of a PCB and coupled to the top surface of the main board disposed inside the multi-band antenna for a vehicle, and a plurality of top loading antennas and a mono helical antenna made of a conductor and formed to have a conductive pattern, thereby providing effects in which the multi-band antenna for a vehicle operates in various broadcasting frequency bands and satisfies antenna characteristics.

Description

A multi-band antenna for a vehicle (Multi-Band Antenna for Vehicle)

The present invention relates to a multi-band antenna for a vehicle, and more particularly, to a multi-band antenna for a vehicle, which includes a plurality of dual helical antennas coupled in a PCB form on an upper surface of a main board positioned inside a multi- And a plurality of top loading antennas and a mono helical antenna formed at the same time so as to operate in various broadcasting frequency bands while simultaneously satisfying antenna characteristics.

2. Description of the Related Art [0002] In recent years, there has been an increasing need to provide broadcasting services of various frequency bands due to the rapid development of communication technology, and it is possible to reduce the manufacturing cost in terms of royalties, And a plurality of antennas such as a radio broadcasting antenna, a satellite DMB broadcasting antenna, a terrestrial DMB broadcasting antenna, and a GPS antenna are mounted in the interior of the vehicle multi-band antenna. And an attempt is made to mount the reflected antenna.

 However, due to the limited space in mounting the antennas having various functions in the conventional multi-band antenna for a vehicle, the multi-band antenna for an automobile is an electric small antenna having an antenna size smaller than? / 16 of the operating frequency There is a problem in that the radiation efficiency of the antenna is drastically reduced as the size of the antenna is reduced. In addition, since a plurality of antennas operating in different frequency bands coexist in a limited space, There is a problem that the antenna characteristics of the multi-band antenna and the antenna characteristics of the existing antenna are deteriorated at the same time.

Accordingly, it is possible to provide a multi-band antenna for a vehicle that prevents signal interference within a limited space inside a multi-band antenna for a vehicle in which a plurality of antennas and a vehicle multi-band antenna are simultaneously mounted, and operates for various broadcast frequencies and various services satisfying consumers A realistic and highly utilizable technology is desperately needed.

Patent No. KR 10-1347936, page 2014.01.08, page 4 Identification No. [2] ~ 3 Identification No. [21], Drawing 1, Drawing 4

The present invention provides a multi-band antenna for a vehicle that prevents signal interference in a limited space inside a multi-band antenna for a vehicle in which a plurality of antennas and a multi-band antenna for a vehicle are simultaneously mounted, and operates for various broadcast frequencies and various services satisfying consumers The purpose is to do.

In order to achieve the above object, a vehicle multi-band antenna according to an embodiment of the present invention is mounted on an upper surface of a main board, which is located inside a multi-band antenna for a vehicle formed in a streamlined dome shape and has a power feeding circuit and a ground plane 1. A multi-band antenna for a vehicle, comprising: a first dual helical antenna formed at a first end of the main board in a longitudinal direction of the main board, the first dual helical antenna being disposed in a vertical direction of the main board; A first top loading antenna formed in the longitudinal direction of the main board in parallel with the upper end of the first dual helical antenna and formed of a conductive conductor; A second dual helical antenna formed in a PCB shape having an overall triangular shape and spaced apart from the first dual helical antenna by a predetermined distance in the widthwise direction of the main board; And a plurality of top loading units connected to the PCBs of the second dual helical antenna so as to have a structure vertically penetrating through the first and second dual helical antennas in a width direction perpendicular to the first and second helical antennas, A second top loading antenna integrally provided with a single mono helical antenna; . ≪ / RTI >

The first dual helical antenna includes a first helical radiator having a feeding part electrically connected to a power feeding circuit of the main board; A second helical radiator having a ground portion electrically connected to a ground plane of the main board; And a dielectric substrate formed to have a structure in which the first and second helical radiators are coupled to each other with a predetermined gap therebetween, wherein each of the first and second helical radiators has a helical conductor A via hole passing through the main dielectric substrate and a conductive line pattern formed on both surfaces of the main dielectric substrate.

The second dual helical antenna includes a third helical radiator and a fourth helical radiator formed on the other side of the main board and having a vertical structure with the first dual helical antenna and having a helical antenna structure, And a dielectric substrate formed on the third and fourth helical radiators so as to be coupled to each other with a predetermined gap therebetween, wherein each of the third and fourth helical radiators has a helical structure, A via hole passing through the dielectric substrate and a conductive line pattern formed on both surfaces of the dielectric substrate.

The first top loading antenna may include a plurality of bending connections to be electrically connected to the ends of the first and second helical radiators provided in the first dual helical antenna.

Wherein the second top loading antenna is electrically connected to the plurality of top loading busses at the ends of the third and fourth helical radiators provided in the second dual helical antenna, And a plurality of via holes passing through the dielectric substrate to connect the plurality of conductive patterns and the conductive patterns located on different surfaces of the plurality of conductive patterns, And a mono helical antenna formed of a conductive line pattern and a via hole spaced apart from the top loading unit disposed in front of the second dual helical antenna.

Also, in the embodiment of the present invention, the first helical radiator of the first dual helical antenna, the second helical radiator of the first dual helical antenna, and the first top loading antenna are coupled as a whole to couple AM broadcast and FM broadcast It is possible to operate in a dual frequency band which is a frequency band.

The plurality of conductive patterns formed on the second top loading part may be formed in an inductor-type pattern in order to prevent signal interference with the adjacent mono-helical antenna.

In the vehicle multi-band antenna according to an embodiment of the present invention, the second dual helical antenna and the second top loading antenna are coupled and coupled to each other to form a European DAB (Digital Audio Broadcasting), that is, Band-III (terrestrial DMB) And can operate as an antenna covering the ~ 240MHz band and the 1452 ~ 1492MHz band which is the L-band (satellite DMB).

The second top loading antenna is connected to a third helical radiator of a second dual helical antenna having a feeding part and connected to the feeding part of the main board, and the second top loading antenna has a short- (Terrestrial DMB), which is connected to the fourth helical radiator of the second dual helical antenna connected to the grounding unit.

Also, the mono helical antenna formed on the second top loading antenna may be directly connected to the feeding part of the main substrate and may operate as an antenna covering the 1452~1492 MHz band which is the L-band (satellite DMB).

As described above, according to the present invention, a first dual helical antenna (100) formed on a PCB substrate on an upper surface of a main board located inside a multi-band antenna for a vehicle, 2 helical radiators are coupled to each other so as to satisfy the antenna characteristics required for respective frequency bands and to operate in various broadcast frequency bands.

In order to increase the strength of the electric field and to prevent the radiation efficiency from being degraded, the multi-band antenna for a vehicle according to the present invention may include a plurality of helical radiators, each of which is electrically connected to a first dual helical antenna having a plurality of helical radiators, 1 < / RTI > loading antenna, thereby preventing radiation efficiency from being degraded, thereby improving the performance of the antenna.

In addition, according to the present invention, coupling between the antenna units formed by connecting the first helical radiator of the first dual helical antenna to the second helical radiator and the first top loading antenna results in a frequency higher than a frequency corresponding to the antenna length It is possible to provide a broadcast antenna with improved radiation efficiency by improving the bandwidth by increasing the antenna length in a specific frequency band.

In addition, a first dual helical antenna having a coupling feed structure and a plurality of helical radiators, and a first top loading antenna formed of a conductive conductor and connected to the first dual helical antenna, Even if the length of the antenna is increased, it is possible to design an antenna that operates in a specific frequency band, and at the same time, the radiation efficiency is improved and signal interference is prevented.

In the multi-band antenna for a vehicle according to the present invention, the third and fourth helical radiators of the second dual helical antenna are opposed to each other and disposed so as to be electromagnetically coupled to each other.

The vehicle multi-band antenna according to the present invention has an effect of further preventing signal interference of the adjacent mono helical antenna when a plurality of top loading units constituting the second dual helical antenna are constituted by a conductive pattern.

1 is an exploded perspective view showing the overall configuration of a multi-band antenna for a vehicle according to an embodiment of the present invention.
2 is a rear perspective view of a multi-band antenna for a vehicle according to an embodiment of the present invention.
3 to 4 are side views from both sides to show a multi-band antenna for a vehicle according to an embodiment of the present invention.
5 to 6 are side views illustrating the first dual helical antenna and the first top loading antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating a first dual helical antenna having a coupling structure according to an embodiment of the present invention. Referring to FIG.
8 to 9 are side views illustrating the second dual helical antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.
10 to 11 are side views of the second top loading antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.

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

In the following drawings, components having the same function are denoted by the same reference numerals and repetitive description is omitted. Further, the following terms are defined in consideration of the functions of the present invention, And that it should be construed as a concept and its usual meaning.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is an exploded perspective view showing a general configuration of a multi-band antenna for a vehicle according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a multi-band antenna for a vehicle according to an embodiment of the present invention, And is a side view seen from both sides to show a multi-band antenna for a vehicle according to an embodiment of the present invention.

1 to 4, a vehicle multi-band antenna 10 according to the present invention includes a shark fin cover 11 formed in a streamlined dome shape, Is formed on the upper surface of the main board 12 formed with the main board 12. The vehicle multi-band antenna 10 is mounted on the main board 12 in three directions: an upper direction (first direction) of the main board 12, a longitudinal direction (second direction) of the main board 12, Direction (third direction), respectively.

The multi-band antenna 10 for a vehicle according to an embodiment of the present invention includes a first dual helical antenna 100 operating in a first frequency band and a first top loading connected to the first dual helical antenna 100 A second dual helical antenna 500 operating in the second through third frequency bands and a second top loading antenna 600 connected to the second dual helical antenna 500. The first dual-

More specifically, the first dual helical antenna 100 includes a PCB-type dielectric substrate formed on one side of the main board 12 in the upper direction (first direction) of the main board 12, As shown in FIG.

The first top loading antenna 200 is connected to the upper end of the first dual helical antenna 100 so as to be parallel and spaced apart from the main board 12, .

The second dual helical antenna 500 is formed in an upper direction (first direction) of the main board 12 at the other side of the main board 12 while being spaced apart from the first dual helical antenna by a predetermined distance The helical radiators having the same shape as the helical conductors constituting the first dual helical antenna 100 are formed on both surfaces of the dielectric substrate in the form of a PCB having a triangular shape as a whole.

The second top loading antenna 600 is connected to the upper end of the second dual helical antenna 500 and is connected to the PCB substrate constituting the second dual helical antenna vertically in the width direction And a plurality of top loading units 610 and 620 and a single mono helical antenna 630 formed adjacent to the front and rear sides of the second dual helical antenna, respectively.

In one embodiment of the present invention, the first dual helical antenna 100 and the first top loading antenna 200 are connected, and the second dual helical antenna 500 and the second top loading antenna 600 are configured And the mono helical antenna may be formed spaced apart from the first top loading unit 610. The first and second top loading units 610 and 620 are connected to each other.

The first dual helical antenna 100 may include a plurality of helical radiators 110 and 120 so that the first top loading antenna 200 and a plurality of bending connection portions The second dual helical antenna 500 operates in the FM broadcast and AM broadcast frequency bands in the first frequency band and the plurality of helical radiators 510 and 520 are connected to the second dual helical antenna 500, When the second dual helical antenna 500 and the second top loading antenna 600 are coupled to each other and connected to the plurality of top loading units 610 and 620 constituting the two top loading antenna 600, The mono helical antenna 630, which is formed integrally with the second top loading antenna 600, is directly connected to the main substrate, and can be operated in the L- -band band (satellite DMB) 1452 ~ 14 It can operate as an antenna covering the 92 MHz band.

 A multi-band antenna for a vehicle according to an embodiment of the present invention will be described in detail with reference to the following drawings.

5 to 6 are side views illustrating the first dual helical antenna and the first top loading antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.

5 to 6, the first dual helical antenna 100 includes a plurality of helical radiators 110 and 120 and is electrically connected to a power supply circuit and a ground plane of the main board 12, respectively, The first and second helical radiators 110 and 120 are coupled to each other with a predetermined distance therebetween so that the first dual helical antenna 100 is coupled to the main board 12 Thereby forming a feeding structure.

The direction in which the first dual helical antenna 100 is formed is determined based on the main board 12 in order to reduce electromagnetic interference from the ground plane provided on the main board 12, The first dual helical antenna 100 includes a plurality of helical radiators 110 and 120 and a plurality of first radiating antennas 110 and 120. The plurality of helical radiators 110 and 120 are formed in a first direction ) Are formed in parallel to each other.

The dielectric substrate 101 on which the first dual helical antenna 100 is formed is formed in the longitudinal direction of the main board 12 so that the first dual helical antenna 100 does not deviate from a limited space .

5 to 6, the first dual helical antenna 100 includes a first helical radiator (not shown) having a feeding part 111 electrically connected to a feeding circuit of the main board 12 A second helical radiator 120 having a first helical radiator 110 and a shorting portion 121 electrically connected to a ground plane of the main board 12 and a second helical radiator 120 having a first helical radiator 110 and a second helical radiator 120 And a dielectric substrate 101 formed to be spaced apart from each other by a predetermined distance.

FIG. 7 is a schematic diagram illustrating a first dual helical antenna having a coupling structure according to an embodiment of the present invention. Referring to FIG.

7, the first helical radiator 101 and the second helical radiator 102 each have a spiral structure in which coil-shaped helical conductors are wound through the dielectric substrate 101, A via hole 102 passing through the dielectric substrate 101 and a conductive line pattern 103 formed on both surfaces of the dielectric substrate 101. The conductive line pattern 103 is formed on both surfaces of the dielectric substrate 101,

The helical conductors of the dual first and second helical radiators 110 and 120 having the indirect coupling feeding structure according to the present invention are respectively connected to the power supply circuit and the ground plane of the main board 12, Two helical conductors having a length of 15 mm and a height of 60 mm are arranged at intervals of 1 mm and the length of the two helical conductors is set to resonance at 74 MHz which is lower than the center frequency of the FM frequency band when there is no helical conductor connected to the ground plane Respectively. Resonance occurs at 98 MHz when the two radiators resonating at 74 MHz are electrically connected to the power feeding circuit and the ground plane of the main board 12 and are electromagnetically coupled to each other. The helical radiators 210 and 220 included in the antenna 10 may increase the length of the antenna within a limited space compared with the normal mode helical conductor, , And AM broadcasting (500 KHz to 1.7 MHz).

As described above, the first dual helical antenna 100 of the vehicle multi-band antenna 10 according to an embodiment of the present invention includes first and second helical radiators 110 and 120 formed on a PCB substrate and spaced apart from each other by a predetermined distance And the first and second helical radiators 110 and 120 are coupled to each other to couple to each other, thereby satisfying antenna characteristics required for respective frequency bands and operating in various broadcast frequency bands.

On the other hand, in a general normal mode helical antenna, magnetic fields are added to each other due to the spiral spring structure, so that a magnetic field having a relatively high density is formed as compared with an electric field and radiation efficiency is lowered. Therefore, The band antenna 10 may include a plurality of helical radiators 110 and 120 having a coupling feeding structure to increase the strength of the electric field and prevent radiation efficiency from being degraded, A first top loading antenna 200 electrically connected to the helical antenna 100 and formed of a conductive conductor is provided to prevent the radiation efficiency from being lowered, thereby improving the performance of the antenna.

The conductive conductor forming the first top loading antenna 200 may include a plurality of bending connection portions 210 and 220 to be electrically connected to ends of the plurality of helical radiators 110 and 120 of the first dual helical antenna 100, .

That is, a multi-band antenna for a vehicle according to an embodiment of the present invention includes a connection pattern 113 on a dielectric substrate 101 constituting a first dual helical antenna 100, The connecting pattern 113 and the first bending connection portion 210 of the first top loading antenna are electrically connected to each other and the connection pattern 123 is provided on the dielectric substrate 101 constituting the second helical radiator 120 The coupling pattern 123 of the second helical radiator 210 is electrically connected to the second bending connection part 220 and the first antenna part and the second antenna part are coupled together as a whole, And a dual frequency band that is an FM broadcast frequency band.

In this case, in one embodiment of the present invention, the antenna is designed to operate in the FM broadcasting frequency band, which is a relatively high frequency of two frequencies. In an embodiment of the present invention, the first and second antenna units are coupled by coupling, Band antenna according to an embodiment of the present invention increases the antenna length in a specific frequency band and increases the bandwidth of the antenna in a specific frequency band because the antenna operates in a frequency band higher than a frequency corresponding to the antenna length forming each of the first and second antenna portions. Thereby forming a broadcast antenna with improved radiation efficiency.

Accordingly, the first dual helical antenna 100, which is a radio broadcasting antenna according to an embodiment of the present invention, and the first top loading antenna 200 are connected to each other and are connected to the FM broadcasting frequency band of 500 KHz to 1.7 MHz, And operate in the dual frequency band of 88 MHz to 108 MHz.

As described above, the vehicle multi-band antenna 10 according to an embodiment of the present invention includes a first dual helical antenna 100 having a coupling feed structure and a plurality of helical radiators 110 and 120, It is possible to design an antenna that operates in a specific frequency band even if the size of the antenna is reduced and the length of the antenna is increased within a limited space including the first top loading antenna 200. At the same time, .

8 to 9 are side views of the second dual helical antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.

As shown in the figure, the second dual helical antenna 500 is formed in a PCB shape and is formed in an upper direction (first direction) of the main board 12 from the other side of the main board 12, When the second dual helical antenna 500 and the second top loading antenna 600 are coupled to each other by coupling to the second top loading antenna 600, a digital DAB (Digital Audio Broadcasting) DMB) and an L-band (satellite DMB) band covering 1452 to 1492 MHz.

The second dual helical antenna 500 is formed on both surfaces of the dielectric substrate 501 in a PCB shape having a triangular shape as a whole and spaced apart from the first dual helical antenna 100, And a dielectric substrate 501 having a fourth helical radiator 520 and the third and fourth helical radiators 510 and 520 spaced apart from each other by a predetermined distance.

That is, the third helical radiator 510 includes a feeding part 511 connected to the power feeding circuit of the main board 12, a connecting part 513 connected to the feeding part 611 of the second top loading antenna 600, The helical conductor is wound on both sides of the dielectric substrate 501 to form a right triangular structure.

The fourth helical radiator 520 includes a shorting part 521 connected to the ground plane of the main board 12 and a connecting part 523 connected to the shorting part 621 of the second top loading antenna 600 The helical conductor is wound on both sides of the dielectric substrate 501 to form a right triangular structure.

The third helical radiator 510 and the fourth helical radiator 520 are connected to the first and second helical radiators 110 and 120 formed on the first dual helical antenna 100, (Not shown) that penetrates the dielectric substrate 501, and a dielectric layer formed on both surfaces of the dielectric substrate 501. The dielectric substrate 501 is formed to have a spiral structure in the form of a coil, And a conductive line pattern (not shown) formed on the substrate.

10 to 11 are side views of the second top loading antenna of the multi-band antenna for a vehicle according to an embodiment of the present invention.

The second top loading antenna 600 is connected to the upper end of the second dual helical antenna 500 and penetrates vertically in the width direction with respect to the PCB of the second dual helical antenna 500 And a plurality of top loading units 610 and 620 and a single mono helical antenna 630 which are formed adjacent to the front and rear sides of the second dual helical antenna 500, respectively.

The second top loading antenna 600 is electrically connected to the top loading units 610 and 620 at the ends of the third and fourth helical radiators 510 and 520 provided in the second dual helical antenna, The top loading unit has a plurality of conductive patterns (601) formed with a dielectric substrate therebetween, and a plurality of conductive patterns disposed on different surfaces of the plurality of conductive patterns, And the plurality of conductive patterns 601 may be connected to the feed part 611 and the shorting part 621 to be described later and may be connected to the second top loading antenna 600 through the via hole 602. [ The conductive patterns 601 formed on both surfaces of the dielectric substrate constituting the dielectric substrate 601 have a structure in which they intersect on different surfaces and can be electrically connected.

The second top loading antenna 600 is connected to a connection portion 513 provided in the third helical radiator 510 of the second dual helical antenna 500 with a feeder 611, (Terrestrial DMB) by connecting to the second dual helical antenna 500 with a shorting part 621 connected to a connection part 523 provided in the fourth helical radiator 520 of the helical antenna 500, And can operate as an antenna in the 170 to 240 MHz band.

In addition, the mono helical antenna 630 formed on the second top loading antenna 500 operates as an antenna that is directly connected to the feeding part of the main substrate and covers the 1452~1492 MHz band, which is an L-band (satellite DMB) .

Meanwhile, the conductive patterns 601 of the plurality of top loading units 610 and 620 constituting the second top loading antenna can further prevent signal interference of adjacent mono helical antennas, thereby improving the performance of the vehicle multi-band antenna It is effective.

The single mono helical antenna 630 integrally provided in the second top loading antenna 600 is composed of a conductive line pattern and a via hole similarly to the dual helical antenna previously described, And a top loading unit (610) disposed in front of the second dual helical antenna (500) of the first and second dual helical antennas (610, 620).

As described above, according to the present invention, in the first dual helical antenna 100 formed on the PCB substrate on the upper surface of the main board located in the interior of the vehicle multi-band antenna, first and second helical The radiators are coupled to each other to couple to each other, thereby satisfying antenna characteristics required for respective frequency bands and operating at various broadcast frequency bands.

In order to increase the strength of the electric field and to prevent the radiation efficiency from being degraded, the multi-band antenna for a vehicle according to the present invention may include a plurality of helical radiators, each of which is electrically connected to a first dual helical antenna having a plurality of helical radiators, 1 < / RTI > loading antenna, thereby preventing radiation efficiency from being degraded, thereby improving the performance of the antenna.

In addition, according to the present invention, coupling between the antenna units formed by connecting the first helical radiator of the first dual helical antenna to the second helical radiator and the first top loading antenna results in a frequency higher than a frequency corresponding to the antenna length It is possible to provide a broadcast antenna with improved radiation efficiency by improving the bandwidth by increasing the antenna length in a specific frequency band.

In addition, a first dual helical antenna having a coupling feed structure and a plurality of helical radiators, and a first top loading antenna formed of a conductive conductor and connected to the first dual helical antenna, Even if the length of the antenna is increased, it is possible to design an antenna that operates in a specific frequency band, and at the same time, the radiation efficiency is improved and signal interference is prevented.

In the multi-band antenna for a vehicle according to the present invention, the third and fourth helical radiators of the second dual helical antenna are opposed to each other and disposed so as to be electromagnetically coupled to each other.

In addition, the vehicle multi-band antenna according to the present invention further has an effect of preventing null points from occurring in the adjacent mono helical antenna when a plurality of top loading units constituting the second dual helical antenna are constituted by a conductive pattern.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is within the scope of the present invention that component changes to such an extent that they can be coped evenly within a range that does not deviate from the scope of the present invention.

10: Dual band antenna for vehicle 11: Shark pin cover
12: main board 100: first dual helical antenna
101, 501: dielectric substrate 102: via hole
103: conductive line pattern 110, 120: first and second helical radiators
111, 511, 611: feeding parts 121, 521, 621:
113, 123: connection pattern 200: first top loading antenna
210: first bending connection 220: second bending connection
500: second dual helical antenna 510, 520: third. The fourth helical radiator
513, 523: connection part 600: second top loading antenna
610, 620: top loading unit 630: mono helical antenna

Claims (10)

A multi-band antenna for a vehicle, the multi-band antenna for a vehicle being mounted on an upper surface of a main board, which is located inside a multi-band antenna for a vehicle formed in a streamlined dome shape and on which a power feeding circuit and a ground plane are formed,
A first dual helical antenna formed at a first end of the main board in a longitudinal direction of the main board and a PCB in a direction perpendicular to a top surface of the main board;
A first top loading antenna formed in the longitudinal direction of the main board in parallel with the upper end of the first dual helical antenna and formed of a conductive conductor;
A second dual helical antenna formed in a PCB shape having an overall triangular shape and spaced apart from the first dual helical antenna by a predetermined distance in the width direction of the main board; And
A plurality of top loading units connected to the PCBs constituting the second dual helical antenna so as to have a structure vertically penetrating in the width direction and formed adjacent to the front and rear sides of the second dual helical antenna, A second top loading antenna integrally provided with a single mono helical antenna; Band antenna for a vehicle. 2. The antenna of claim 1, wherein the first dual helical antenna comprises:
A first helical radiator having a feeding part electrically connected to a feeding circuit of the main board;
A second helical radiator having a ground portion electrically connected to a ground plane of the main board; And
Wherein the first and second helical radiators are coupled to each other with a predetermined gap therebetween,
Wherein the first and second helical radiators are each composed of a via hole passing through the main dielectric substrate and a conductive line pattern formed on both surfaces of the main dielectric substrate so that the helical conductor has a helical structure, antenna. The antenna according to claim 2, wherein the second dual helical antenna comprises:
A third helical radiator and a fourth helical radiator having a vertical structure with the first dual helical antenna and spaced apart from each other by a predetermined distance and formed on the other side of the main board and having a helical antenna structure, And a dielectric substrate formed to have a structure coupling and coupling at a predetermined distance from each other,
Wherein the third and fourth helical radiators are each composed of a via hole passing through the dielectric substrate and a conductive line pattern formed on both surfaces of the dielectric substrate so that the helical conductor has a helical structure. The antenna of claim 2, wherein the first top loading antenna comprises:
And a plurality of bending connectors for electrically connecting the first and second helical radiators to the ends of the first and second helical radiators. 4. The antenna of claim 3, wherein the second top loading antenna comprises:
The plurality of top loading units are electrically connected to the ends of the third and fourth helical radiators provided in the second dual helical antenna,
Wherein the top loading portion has a plurality of conductive patterns formed on a dielectric substrate and a plurality of conductive patterns disposed on different surfaces of the plurality of conductive patterns, the plurality of via holes passing through the dielectric substrate to connect the conductive patterns, ≪ / RTI >
And a mono helical antenna formed of a conductive line pattern and a via hole spaced apart from a top loading part disposed in front of the second dual helical antenna among the plurality of top loading parts, . The method of claim 4,
The first helical radiator of the first dual helical antenna, the second helical radiator of the first dual helical antenna, and the first top loading antenna are coupled as a whole to operate in a dual frequency band that is an AM broadcast and an FM broadcast frequency band Band antenna. [6] The method of claim 5, wherein the plurality of conductive patterns,
Band antenna is formed in an inductor-type pattern in order to prevent signal interference with an adjacent mono-helical antenna.
The method of claim 5,
The second dual helical antenna and the second top loading antenna are coupled and coupled to each other to form a band of 170-240 MHz which is European DAB (Digital Audio Broadcasting) or Band-III (terrestrial DMB) Band antenna of the present invention operates as an antenna that covers the? 1492 MHz band. The method of claim 8,
The second top loading antenna is connected to a third helical radiator of a second dual helical antenna having a feeding part and connected to the feeding part of the main board. The second top loading antenna has a short- Band antenna is connected to a fourth helical radiator of a second dual helical antenna connected to the second helical antenna, and operates in a band of from 170 to 240 MHz which is Band-III (terrestrial DMB). The method of claim 8,
The mono helical antenna formed on the second top loading antenna is directly connected to the feeding part of the main board and operates as an antenna covering the 1452~1492 MHz band which is the L-band (satellite DMB) .
KR1020160028358A 2016-03-09 2016-03-09 Multi-Band Antenna for Vehicle KR101718922B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102160300B1 (en) 2020-07-29 2020-09-25 주식회사 예건 Multiple band antenna device for trains

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101347936B1 (en) 2012-09-10 2014-01-08 주식회사 에이스테크놀로지 External antenna for automobile
KR101388126B1 (en) * 2012-11-19 2014-04-22 위너콤 주식회사 Multi-band broadcasting antenna for shark fin type antenna apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101347936B1 (en) 2012-09-10 2014-01-08 주식회사 에이스테크놀로지 External antenna for automobile
KR101388126B1 (en) * 2012-11-19 2014-04-22 위너콤 주식회사 Multi-band broadcasting antenna for shark fin type antenna apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102160300B1 (en) 2020-07-29 2020-09-25 주식회사 예건 Multiple band antenna device for trains

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