CN110401017A - A kind of vehicle-mounted FM antenna structure and vehicle-mounted antenna system - Google Patents
A kind of vehicle-mounted FM antenna structure and vehicle-mounted antenna system Download PDFInfo
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- CN110401017A CN110401017A CN201910647076.6A CN201910647076A CN110401017A CN 110401017 A CN110401017 A CN 110401017A CN 201910647076 A CN201910647076 A CN 201910647076A CN 110401017 A CN110401017 A CN 110401017A
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- vehicle
- hilbert
- antenna structure
- antenna
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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
-
- 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
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The application provides a kind of vehicle-mounted FM antenna structure and vehicle-mounted antenna system, wherein, vehicle-mounted FM antenna structure includes vertical strata and top loading layer, by the top loading layer for capableing of flexible folding in the setting of the top of vertical strata, by the metal curvilinear structures in Hilbert structure setting top loading layer and vertical strata, realizing has the antenna structure of FM function.Since vertical strata and top loading layer are all made of the artificial electromagnetic Meta Materials including dielectric-slab and metal curvilinear structures and are formed, metal curve is all made of Hilbert basic unit and is formed, while so that vehicle-mounted FM antenna structure realizes FM function, meet miniaturization, integrated and high antenna gain requirement.
Description
Technical field
The present invention relates to RF component technical field more particularly to a kind of vehicle-mounted FM antenna structures and vehicle-mounted antenna system.
Background technique
With the high speed development of wireless communication technique, car networking is needed using electronic tag, sensor a large amount of on vehicle
Information；The car-mounted terminals antenna such as broadcast antenna, GPS antenna is used to emit and receive relevant information.Due to giving antenna on vehicle
Space it is limited, the miniaturization of car antenna is the inexorable trend of future development.Antenna gain is improved in a limited space, is
One important research direction.
It is the effective height for increasing antennas orthogonal direction that car antenna, which improves the conventional method of passive gain, at present,
In, the vertical direction be in Antenna Design, relative to ground surface+z-axis direction.But it is unsatisfactory for miniaturization sum aggregate in this way
At the development trend of change, therefore, how to provide a kind of miniaturization of satisfaction and it is integrated while, improve antenna gain car antenna
As technical problem urgently to be resolved, it is especially that by the antenna structure of FM function.
Summary of the invention
In view of this, the present invention provides a kind of vehicle-mounted FM antenna structure and vehicle-mounted antenna system, to solve in the prior art
The problem of antenna gain of vehicle-mounted FM antenna and miniaturization, integrated contradiction.
To achieve the above object, the invention provides the following technical scheme:
A kind of vehicle-mounted FM antenna structure, comprising:
Vertical strata and top loading layer；
The vertical strata includes first medium plate, the first metal curve and the second metal curve, the first medium plate packet
Include the first surface and second surface being oppositely arranged；The first metal curve is located at the first surface, second metal
Curve is located at the second surface；Wherein, the first metal curve includes the first linkage section and multiple first Hilbert basic
Unit, first linkage section are located at the top of the vertical strata, and first linkage section and one of them described first
Hilbert basic unit is electrical connected, end to end electric connection between multiple first Hilbert basic units；Described second
Metal curve includes the second linkage section and third linkage section, one end of second linkage section and multiple first Hilbert
One end far from first linkage section is electrically connected after basic unit is connected, the other end of second linkage section and the top
Loading layer is electrically connected；Feeding point of the one end of the third linkage section as the vehicle-mounted FM antenna structure, the other end and institute
Top loading layer is stated to be electrically connected；
The top loading layer includes second medium plate and third metal curve, and the second medium plate includes being oppositely arranged
Third surface and the 4th surface；The third metal curve includes multiple 2nd Hilbert basic units, and multiple second
End to end electric connection between Hilbert basic unit, forms two free ends, and described two free ends are respectively with described
Two linkage sections and the third linkage section are electrically connected；
Wherein, the second medium plate is flexible media plate, and the top of the vertical strata is arranged in covering, and along described straight
The top edge profile of vertical layer folds；The third metal curve is located at the third upper surface or lower surface.
Preferably, the operating frequency range of the FM antenna structure is 87.5MHz-108MHz, including endpoint value.
Preferably, the first Hilbert basic unit and the 2nd Hilbert basic unit are three ranks
Hilbert curve.
Preferably, the number of the first Hilbert basic unit is 2, of the 2nd Hilbert basic unit
Number is 4, and the circumference of 4 Hilbert basic units is square.
Preferably, the line width of the Hilbert curve is 0.5mm, and the spacing between adjacent wires is 2.5mm.
Preferably, the third surface is to push up loading layer metal away from the surface of the vertical strata and vertical strata metal is short
Road connects.
Preferably, the second medium plate is Rogers5880 flexible base board or F4B flexible base board, FPC flexible circuit
Plate.
Preferably, the second medium plate with a thickness of 0.2mm.
Preferably, top edge profile doubling of the top loading layer relative to the vertical strata.
The present invention also provides a kind of vehicle-mounted antenna systems, including vehicle-mounted FM antenna structure described in any of the above one.
It can be seen via above technical scheme that vehicle-mounted FM antenna structure provided by the invention, including vertical strata and top load
Layer is capable of the top loading layer of flexible folding by the setting at the top of vertical strata, by Hilbert structure setting top loading layer and
Metal curvilinear structures in vertical strata, realizing has the antenna structure of FM function.Since vertical strata and top loading layer are all made of packet
The artificial electromagnetic Meta Materials for including dielectric-slab and metal curvilinear structures are formed, and metal curve is all made of Hilbert basic unit and is formed,
While so that vehicle-mounted FM antenna structure realizes FM function, meet miniaturization, integrated and high antenna gain requirement.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is vehicle-mounted FM antenna structure view provided in an embodiment of the present invention；
Fig. 2 is the first surface structural schematic diagram of the vertical strata of vehicle-mounted FM antenna structure provided in an embodiment of the present invention；
Fig. 3 is the second surface structural schematic diagram of the vertical strata of vehicle-mounted FM antenna structure provided in an embodiment of the present invention；
Fig. 4 is that a kind of top provided in an embodiment of the present invention loads schematic diagram of a layer structure；
Fig. 5 is one to quadravalence Hilbert fractal shape schematic diagram；
Fig. 6 is Hilbert parameter of curve schematic diagram provided in an embodiment of the present invention；
Fig. 7 is vehicle-mounted FM antenna reflection coefficient S11 curve provided in an embodiment of the present invention；
Fig. 8 is the gain pattern of vehicle-mounted FM antenna provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Vehicle-mounted FM antenna structure provided in an embodiment of the present invention increases for FM antenna in existing vehicle-mounted integrated antenna system
The lower problem of benefit constitutes artificial electromagnetic Meta Materials using manual electromagnetic structure and commercial media substrate, which has high property
The performance advantage that can, minimize.
Specifically, referring to Figure 1, Fig. 1 is vehicle-mounted FM antenna structure view provided in an embodiment of the present invention, described vehicle-mounted
FM antenna structure includes:
Vertical strata 1 and top loading layer 2；Vertical strata 1 includes first medium plate (not shown), the first metal curve and the
Two metal curves, first medium plate include the first surface and second surface being oppositely arranged；First metal curve is located at the first table
Face, the second metal curve are located at second surface.Pushing up loading layer 2 includes second medium plate and third metal curve, second medium plate
Including the third surface and the 4th surface being oppositely arranged.In the embodiment of the present invention, wherein first medium plate is hard medium plate,
Optionally, it can be pcb board, to form supporting role for top loading layer.Second medium plate is flexible media plate, covering setting
It is folded at the top of vertical strata 1, and along the top edge profile of vertical strata 1；Third metal curve is located at third surface.This implementation
Do not limited in example third surface be directed towards vertical strata or away from vertical strata, covered uprightly as long as can be realized top loading layer 2
The top of layer 1, and folding is formed, realize FM antenna function.
It should be noted that due to covering vertical strata after the loading layer bending of top, in order to avoid on the top loading layer after bending
Metal curve and vertical strata metal curve between short circuit connection occurs, it is optional in the present embodiment, push up the gold on loading layer
Belonging to curve to be located at away from the surface of vertical strata namely third surface is away from the surface of vertical strata.
To further illustrate the vehicle-mounted FM antenna structure provided in the present embodiment, Fig. 2 and Fig. 3 are referred to, wherein Fig. 2 is
The first surface structural schematic diagram of vertical strata, Fig. 3 are the second surface structural schematic diagram of vertical strata；Wherein, the first metal curve
Positioned at the first surface of first medium plate 11, the first metal curve includes the first linkage section 13 and multiple first Hilbert basic
Unit 12 --- such as the dotted line frame in Fig. 2, the first linkage section 13 is located at the top of vertical strata, and the first linkage section 13 and wherein one
A first Hilbert basic unit 12 is electrical connected, and end to end electrical property connects between multiple first Hilbert basic units 12
It connects；Second metal curve includes the second linkage section 14 and third linkage section 15, one end B of the second linkage section 14 and multiple first
One end B ' far from the first linkage section 13 is electrically connected after Hilbert basic unit 12 is connected, the other end D of the second linkage section 14
It is electrically connected with top loading layer；Feeding point of one end A of third linkage section 15 as vehicle-mounted FM antenna structure, other end C and top
Loading layer is electrically connected；
Shown in Figure 4, Fig. 4 is that a kind of top provided in an embodiment of the present invention loads schematic diagram of a layer structure；Wherein, top adds
Carrier layer includes second medium plate 21 and third metal curve 22, and third metal curve 22 includes multiple 2nd Hilbert substantially single
Member, end to end electric connection between multiple 2nd Hilbert basic units, forms two free ends (C ' and D '), two from
By end, (C ' and D ') and the second linkage section 14 and third linkage section 15 are electrically connected respectively.
It should be noted that the first Hilbert basic unit and the 2nd Hilbert basic unit described in the present embodiment
It is three rank Hilbert curves.Hilbert fractal antenna is the modular design in current all antenna types, by medium substrate,
Conductor layer and earth plate are constituted, wherein conductor layer is that Hilbert points of shape is formed, and Fig. 5 is one to quadravalence Hilbert fractal shape
Schematic diagram, Hilbert points of shape can be described as: square being divided into four small squares of single order, is sequentially connected the lower left corner, a left side
The square center at upper angle, the upper right corner, the lower right corner obtains a parting unit (i.e. Hilbert points of shape of single order)；By each single order
Small square is divided into four small squares of second order respectively, repeats the above process, and the high-order point shape unit opening direction of generation is abided by
Keep certain rule (opening direction of the high-order point shape unit in the lower left corner, the upper left corner, the upper right corner, the lower right corner is successively in Fig. 5 are as follows: it is left,
Under, under, it is right), and the opening for connecting parting unit in particular order (is sequentially connected the lower left corner, the upper left corner, the right side in Fig. 5
Upper angle, the lower right corner high-order divide shape unit to be open), finally just obtain the curve that can fill up entire square, here it is
Hibert curve.
In the present embodiment, the first Hilbert basic unit in vertical strata is not limited and pushes up the 2nd Hilbert base in loading layer
The specific number of this unit may include optionally two the first Hilbert basic units as shown in Figure 2, in vertical strata,
As shown in Figure 4, pushing up in loading layer may include four the 2nd Hilbert basic units.It should be noted that in other implementations
It can also include the first Hilbert basic unit of three, four or more in example, in vertical strata 1.Similarly, loading layer is pushed up
In may include eight even more 2nd Hilbert basic units.
Wherein, it should be noted that do not limit the number of Hilbert curved unit and row in vertical strata in the present embodiment
Mode for cloth, can be as shown in Figure 2, and multiple Hilbert curves also can be set in two Hilbert curved units setting up and down
Unit is not construed as limiting this in the present embodiment.Setting as shown in Figure 2, the equivalent length that FM antenna bus can be made long
Length needed for (all length that FM antenna metal curve adds up) reaches 100MHz resonance, to realize that antenna resonance connects in FM
Frequency range needed for device works is received, realizes the good receiving to FM signal in free space.If other modes can reach FM antenna
Resonance can be accordingly arranged in 100MHz.
In addition, it is necessary to illustrate, do not limit vertical strata structure in the present embodiment and push up the placement between loading layer structure
Relationship collectively forms monopole antenna as long as being connected between the metal and the metal curve of vertical strata structure of top loading layer.
The specific thickness of the dielectric board material of vertical strata structure, optional dielectric board material thickness are not limited in the present embodiment
Range is 0.5mm-1.6mm, including endpoint value, the specific material of dielectric board material is not limited in the present embodiment, of the invention
In one embodiment, dielectric board material can be RF4 material, dielectric constant 4.3-4.6, including endpoint value.It can also be it
His pcb board material.The dielectric-slab (namely second medium plate) of loading layer is pushed up with a thickness of 0.2mm, material can be Rogers5880,
The material has the physical characteristic of flexible bendable, therefore can depend on antenna house inner wall, thus room for promotion utilization rate, into
And utmostly promote antenna gain.The metal layer for pushing up loading layer can also use laser engraving technique to be carved in metal curve
Antenna cover inner surface.It should be noted that the bending deformation for pushing up loading layer structure in the present embodiment will not change the resonance of antenna
Frequency.In other embodiments of the invention, second medium plate can also be that F4B flexible base board or FPC flexible circuit board etc. are soft
Property substrate is not construed as limiting this in the present embodiment.
The tool of the first metal curve in FM antenna, the second metal curve and third metal curve is not limited in the present embodiment
Body material is optionally copper.
The Meta Materials FM antenna provided in the present embodiment is made of vertical strata and top loading layer two parts, and basic structure is equal
For Hilbert basic unit, the Hilbert curvilinear structures are as shown in fig. 6, design parameter is as shown in table 1.
| Width W | Length L | Line width s | Cell distance d | Dielectric thickness t |
| 20mm | 20mm | 0.5mm | 1.5mm | 1.5mm |
Above-mentioned dielectric thickness is the dielectric thickness of vertical strata.
In antenna structure provided in an embodiment of the present invention, by multiple Hilbert structure cascades, it is equivalent to an indentation list
The resonance center frequency point of pole sub-antenna, monopole antenna can be indicated with following formula:
F=c/4L (1)
F refers to centre frequency where Antenna Operation in formula, and L is Hilbert curve overall length.
With vehicle-mounted FM antenna structure shown in Fig. 1, Hilbert basic unit line width s is 0.5mm, base in vertical strata
This cell spacing (namely between similar units) d illustrates vehicle-mounted FM antenna structure provided by the invention, the vehicle for being 2.5mm
Isolation between vehicle-mounted mobile communication double antenna can also be improved by carrying FM antenna structure, be low section metamaterial structure.
It is identical with the Hilbert unit size of vertical strata to push up loading layer Hilbert basic-cell dimensions, namely each
The line width s and basic unit spacing of Hilbert unit are all the same, and difference is only that dielectric board material difference.The top loading layer
Hilbert unit is based on Rogers5880 flexible material, and media plate thickness 0.2mm is invested in shark fins shell so as to interior
On wall.
As shown in fig. 7, being high gain metamaterial FM antenna reflection coefficient S11 curve provided in an embodiment of the present invention, from figure
In as can be seen that vehicle-mounted FM antenna provided in an embodiment of the present invention working frequency range be 87.5MHz-108MHz.
As shown in figure 8, being the gain pattern of high gain metamaterial FM antenna provided in an embodiment of the present invention, pass through calculating
The analysis of machine discretization computer sim- ulation, vehicle-mounted Meta Materials FM Antenna Operation provided in an embodiment of the present invention is in 98MHz dominant frequency point, day
Line gain is -22dB.
That is, Meta Materials FM center of antenna frequency point provided in an embodiment of the present invention is 98MHz, bandwidth of operation 87.5MHz-
108MHz, including endpoint value.Antennas orthogonal direction total height (namely upper-lower height in Fig. 1) is less than 45mm, and overall width is (here
Refer to the distance between the right and left of vertical strata in Fig. 1) it is less than 32mm, so as to as a kind of integrated, miniaturization and tool
There is the vehicle-mounted FM antenna of the FM function of high-gain.
Vehicle-mounted FM antenna structure provided by the invention, including vertical strata and top loading layer, by being set at the top of vertical strata
The top loading layer for capableing of flexible folding is set, by the metal curvilinear structures in Hilbert structure setting top loading layer and vertical strata,
Realize the antenna structure with FM function.Since vertical strata and top loading layer are all made of including dielectric-slab and metal curvilinear structures
Artificial electromagnetic Meta Materials are formed, and metal curve is all made of Hilbert basic unit and is formed, so that vehicle-mounted FM antenna structure realizes FM
While function, meet miniaturization, integrated and high antenna gain requirement.
Based on identical inventive concept, the present invention also provides a kind of vehicle-mounted antenna systems, including described in above example
Vehicle-mounted FM antenna structure, can also include other antenna structures, such as GPS antenna, WiFi antenna, Bluetooth antenna etc., this
This is not construed as limiting in embodiment, is uniformly integrated in shark fins interior of shell, forms high-gain vehicle-mounted antenna system.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that article or equipment including a series of elements not only include those elements, but also
It including other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Do not having
In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the article including above-mentioned element
Or there is also other identical elements in equipment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of vehicle-mounted FM antenna structure characterized by comprising
Vertical strata and top loading layer；
The vertical strata includes first medium plate, the first metal curve and the second metal curve, and the first medium plate includes phase
To the first surface and second surface of setting；The first metal curve is located at the first surface, the second metal curve
Positioned at the second surface；Wherein, the first metal curve includes the first linkage section and multiple first Hilbert substantially single
Member, first linkage section are located at the top of the vertical strata, and first linkage section and one of them described first
Hilbert basic unit is electrical connected, end to end electric connection between multiple first Hilbert basic units；Described second
Metal curve includes the second linkage section and third linkage section, one end of second linkage section and multiple first Hilbert
One end far from first linkage section is electrically connected after basic unit is connected, the other end of second linkage section and the top
Loading layer is electrically connected；Feeding point of the one end of the third linkage section as the vehicle-mounted FM antenna structure, the other end and institute
Top loading layer is stated to be electrically connected；
The top loading layer includes second medium plate and third metal curve, and the second medium plate includes the third being oppositely arranged
Surface and the 4th surface；The third metal curve includes multiple 2nd Hilbert basic units, multiple 2nd Hilbert bases
End to end electric connection between this unit, forms two free ends, described two free ends respectively with second linkage section
It is electrically connected with the third linkage section；
Wherein, the second medium plate is flexible media plate, and the top of the vertical strata is arranged in covering, and along the vertical strata
Top edge profile fold；The third metal curve is located at the third upper surface or lower surface.
2. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the working frequency model of the FM antenna structure
It encloses for 87.5MHz-108MHz, including endpoint value.
3. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the first Hilbert basic unit and
The 2nd Hilbert basic unit is three rank Hilbert curves.
4. vehicle-mounted FM antenna structure according to claim 3, which is characterized in that the first Hilbert basic unit
Number is 2, and the number of the 2nd Hilbert basic unit is 4, the circumference of 4 Hilbert basic units
It is square.
5. vehicle-mounted FM antenna structure according to claim 3, which is characterized in that the line width of the Hilbert curve is
0.5mm, the spacing between adjacent wires are 2.5mm.
6. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the third surface is away from described upright
The surface of layer, pushes up loading layer metal and vertical strata short circuit metal connects.
7. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the second medium plate is Rogers5880
Flexible base board, F4B flexible base board or FPC flexible circuit board.
8. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the second medium plate with a thickness of
0.2mm。
9. vehicle-mounted FM antenna structure according to claim 1, which is characterized in that the top loading layer is relative to described upright
The top edge profile doubling of layer.
10. a kind of vehicle-mounted antenna system, which is characterized in that including vehicle-mounted FM days knots described in any one of claim 1-9
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647076.6A CN110401017B (en) | 2019-07-17 | 2019-07-17 | Vehicle-mounted FM antenna structure and vehicle-mounted antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647076.6A CN110401017B (en) | 2019-07-17 | 2019-07-17 | Vehicle-mounted FM antenna structure and vehicle-mounted antenna system |
Publications (2)
| Publication Number | Publication Date |
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| CN110401017A true CN110401017A (en) | 2019-11-01 |
| CN110401017B CN110401017B (en) | 2020-10-13 |
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| CN201910647076.6A Active CN110401017B (en) | 2019-07-17 | 2019-07-17 | Vehicle-mounted FM antenna structure and vehicle-mounted antenna system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| IT202100021305A1 (en) * | 2021-08-05 | 2023-02-05 | Mantid S R L | INDUCTOR BASED ON HILBERT CURVES |
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|---|---|---|---|---|
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| US20090167612A1 (en) * | 2003-02-19 | 2009-07-02 | Carles Puente Baliarda | Miniature antenna having a volumetric structure |
| US20090207084A1 (en) * | 2006-11-22 | 2009-08-20 | Nippon Antena Kabushiki Kaisha | Antenna Apparatus |
| CN106207402A (en) * | 2014-10-14 | 2016-12-07 | 伟能公司 | Vehicle multiband antenna |
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| US20090167612A1 (en) * | 2003-02-19 | 2009-07-02 | Carles Puente Baliarda | Miniature antenna having a volumetric structure |
| CN101116224A (en) * | 2004-12-09 | 2008-01-30 | 先进汽车天线（A3）公司 | Miniature antenna for a motor vehicle |
| US20090207084A1 (en) * | 2006-11-22 | 2009-08-20 | Nippon Antena Kabushiki Kaisha | Antenna Apparatus |
| CN106207402A (en) * | 2014-10-14 | 2016-12-07 | 伟能公司 | Vehicle multiband antenna |
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| CN110401017B (en) | 2020-10-13 |
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