CN109473787A - A kind of shark fins antenna module - Google Patents
A kind of shark fins antenna module Download PDFInfo
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- CN109473787A CN109473787A CN201811507850.5A CN201811507850A CN109473787A CN 109473787 A CN109473787 A CN 109473787A CN 201811507850 A CN201811507850 A CN 201811507850A CN 109473787 A CN109473787 A CN 109473787A
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- 241000826860 Trapezium Species 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
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- 238000003466 welding Methods 0.000 description 14
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- 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
-
- 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- 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
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Abstract
The present invention discloses a kind of shark fins antenna module, belong to field of antenna, including shark fin type antenna cover and antenna base, is fixed with active circuit plate in antenna base, it is vertically and fixedly provided with AM/FM antenna and LTE antenna on active circuit plate, is horizontally fixed with satellite navigation aerial on active circuit plate；AM/FM antenna includes first substrate, spiral radiation body, feed arm and loaded member, spiral radiation body and feed arm printing are on the first substrate, loaded member is arranged on the top of first substrate, and one end of spiral radiation body is connected to feed arm, and the other end of spiral radiation body is connected to loaded member；LTE antenna includes the second substrate, is connected to the first radiator of grounding point and is connected to the second radiator of feeding point, first radiator and the second radiator, which are connected to be grounded, to be printed on the first face of the second substrate, and the working frequency range of the first radiator is lower than the working frequency range of the second radiator.Shark fins antenna module of the invention has many advantages, such as that small in size, multi-functional and signal receiving performance is good.
Description
Technical field
The present invention relates to field of antenna, in particular to a kind of shark fins antenna module.
Background technique
Currently, people are higher and higher to the external form of automobile and functional requirement, traditional with the fast development of auto industry
Single radio function has been far from satisfying the market demand, various mobile interchanges communications, satellite navigation function importing all
Car antenna is needed to design.Under the premise of meeting multi-functional, antenna shapes are required but also various antennas tend to minimize, just
In being integrated in shark fins shell, but the existing generally existing signal receiving quality of shark fins antenna is unsatisfactory, and design does not conform to
Reason, the problems such as having a single function.
Summary of the invention
In view of this, the purpose of the embodiment of the present invention is that providing the shark fins antenna of multi-functional one kind, miniaturization, beautyization
Component.The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of shark fins antenna module, including shark fin type antenna cover and antenna base are provided, in the antenna base
It is fixed with active circuit plate, AM/FM antenna and LTE antenna, the active circuit are vertically and fixedly provided on the active circuit plate
Satellite navigation aerial is horizontally fixed on plate；
The AM/FM antenna includes first substrate, spiral radiation body, feed arm and loaded member, the spiral radiation body and
On the first substrate, the loaded member is arranged on the top of the first substrate, the spiral for the feed arm printing
One end of radiator is connected to the feed arm, and the other end of the spiral radiation body is connected to the loaded member；
The LTE antenna includes the second substrate, the first radiator for being connected to grounding point and be connected to feeding point
Two radiators, first radiator and second radiator, which are connected to be grounded, to be printed on the first face of the second substrate,
The working frequency range of first radiator is lower than the working frequency range of second radiator.
Further, the first substrate is in chamfer trapezium structure, and the spiral radiation body includes multiple conducting line segments, institute
It states on the laterally staggered two sides for being printed on the first substrate of multiple conducting line segments, and is passed sequentially through between the multiple conducting line segment
The via hole of the first substrate is connected.
Further, the substantially inverted V shaped structure of the loaded member.
Further, the loaded member includes clamping part, the first side and the second side, first side and described
The two sides of the clamping part are asymmetrically arranged in two sides, and the clamping part has the top for clamping the first substrate
Holding tank.
Further, the second substrate has left lateral and the right portion, is connected to the left lateral and the right portion
Between upper edge and lower edge, the feeding point and the grounding point are arranged in the lower edge；
First radiator surrounds the edge distribution of the lower edge, the right portion and the upper edge, and described the
Edge direction of two radiators from the edge of the left lateral towards the right portion extends to be connected to first radiator.
Further, first radiator includes sequentially connected first radiation branch, the second radiation branch and third
Radiation branch, first radiation branch, second radiation branch and the third radiation branch respectively correspond and are distributed in institute
On the edge for stating lower edge, the right portion and the upper edge；
The width of first radiation branch is greater than the width of the second radiation branch, and the width of first radiation branch
Less than the width of the third radiation branch.
Further, second radiator includes radiating principal and extension interconnected, the extension connection
To first radiator；
Wherein, the radiating principal is the polygon for being cut three rectangular angulars thereon by a rectangular-shaped metallic object and being formed
Shape, the area of the rectangular-shaped metallic object are greater than the half of the area of the second substrate.
Preferably, three rectangular angulars are located at top left region, lower left region and the right side of the rectangular-shaped metallic object
Lower region.
Further, the second substrate structure in a rectangular trapezoid.
Further, the LTE antenna further includes the parasitic body being printed on the second face of the second substrate, and described
Two faces are opposite with first face, and the parasitic body is electrically connected at the grounding point.
A kind of shark fins antenna module provided in an embodiment of the present invention, it is active by being fixed in the antenna base
Circuit board, is vertically and fixedly provided with AM/FM antenna and LTE antenna on the active circuit plate, horizontal fixed on the active circuit plate
There is satellite navigation aerial, wherein AM/FM antenna uses the form of printed spiral antenna on the first substrate, and dexterously
The top setting impedance operator of one substrate is the loaded member of capacitive, and structure is simple, can not only increase antenna capacitive reactance, can offset
The emotional resistance of helical antenna, so that carrying out impedance matching, preferably so as to effectively improve the radiation efficiency and work of antenna
Make bandwidth, and the effect of the good signal quality of reception can be obtained；The first radiator and second are radiated in addition, LTE antenna uses
Body, which is connected to be grounded, to be printed on the first face of the second substrate, i.e., by the way of single side radiation, and by respectively by the first radiation
Body is connected to grounding point, the second radiator is connected to feeding point, and thus not only antenna volume is smaller, and due to the first radiator
Two frequency ranges of 900MHz and 1800MHz are generated in a manner of the load of gap with the second radiator, can be realized radiation multiband
Effect, while the bandwidth of two high frequencies of antenna also can be effectively broadened, effectively improve antenna receptivity；In short, the present invention produces
Product will be fixed on the same active circuit plate in all kinds of common antenna sets, have small in size, good appearance, powerful, letter
Many advantages, such as number quality of reception is preferable.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of sectional structure chart of shark fins antenna module provided in an embodiment of the present invention；
Fig. 2 is the three-dimensional structure diagram of AM/FM antenna provided in an embodiment of the present invention；
Fig. 3 a is the front view of LTE antenna provided in an embodiment of the present invention；
Fig. 3 b is the rearview of LTE antenna provided in an embodiment of the present invention；
Fig. 4 is the front view of AM/FM antenna provided in an embodiment of the present invention；
Fig. 5 is the rearview of AM/FM antenna provided in an embodiment of the present invention；
Fig. 6 is the three-dimensional structure diagram of the loaded member of AM/FM antenna provided in an embodiment of the present invention；
Fig. 7 is the front view of the loaded member of AM/FM antenna provided in an embodiment of the present invention；
Fig. 8 is the side view of the loaded member of AM/FM antenna provided in an embodiment of the present invention；
Fig. 9 is gain test figure of the AM/FM antenna provided in an embodiment of the present invention in AM frequency range；
Figure 10 is return loss (ReturnLoss) test of the AM/FM antenna provided in an embodiment of the present invention in AM frequency range
Figure；
Figure 11 is gain test figure of the AM/FM antenna provided in an embodiment of the present invention in FM frequency range；
Figure 12 is return loss (ReturnLoss) test of the AM/FM antenna provided in an embodiment of the present invention in FM frequency range
Figure；
Figure 13 is return loss (ReturnLoss) test of the LTE antenna provided in an embodiment of the present invention in LTE frequency range
Figure；
Figure 14 is the isolation degree test figure of AM/FM antenna provided in an embodiment of the present invention and LTE antenna；
Figure 15 is the isolation degree test figure of satellite navigation aerial provided in an embodiment of the present invention and LTE antenna.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be bright
Show or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple " contain
Justice is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Shown in Figure 1, the cross-section structure that Fig. 1 shows a kind of shark fins antenna module according to an embodiment of the present invention shows
It is intended to, which includes shark fin type antenna cover 10 and antenna base 20, has been fixed in antenna base 20
Source circuit plate 30, is vertically and fixedly provided with AM/FM antenna 40 and LTE antenna 50 on active circuit plate 30, horizontal on active circuit plate 30
It is fixed with satellite navigation aerial 60.Wherein, satellite navigation aerial 60, LTE antenna 50 and AM/FM antenna 40 press shark fin type antenna
The change direction of the height of cover 10 from low to high is successively set on active circuit plate 30, satellite navigation aerial 60 and LTE antenna
Spacing between 50 is 7.5mm, and the spacing between LTE antenna 50 and AM/FM antenna 40 is 6.0mm.Antenna base 20 passes through line
Cable assembly exports the signal that AM/FM antenna 40, LTE antenna 50 and satellite navigation aerial 60 receive to vehicle main frame.This
Outside, satellite navigation aerial 60 can use ceramic antenna form, and patch size is specifically as follows 26mm*26mm*4mm.
Specifically, Fig. 2 is the three-dimensional structure diagram of AM/FM antenna provided in an embodiment of the present invention referring to shown in Fig. 2.AM/FM
Antenna 40 includes first substrate 41, spiral radiation body 42, feed arm 43 and loaded member 44, and spiral radiation body 42 and feed arm 43 print
Brush is on first substrate 41, and loaded member 44 is arranged on the top of first substrate 41, and one end of spiral radiation body 42 is connected to feedback
Electric arm 43, the other end of spiral radiation body 42 are connected to loaded member 44.Wherein, the bottom margin of first substrate 41 is equipped with for welding
It is connected to the left welding ends, middle welding ends, right welding ends of active circuit plate 30, wherein feed arm 43 is electrically connected to right welding ends,
Right welding ends is electrically connected to the signal input part of active circuit plate 30, and the signal input part of active circuit plate 30 was by AM/FM days
The radio signal transmission that line receives to amplifying circuit carries out signal amplification, is then transmitted to automobile radio reception by cable-assembly
Machine.
Referring to shown in Fig. 3 a and Fig. 3 b, Fig. 3 a, Fig. 3 b be respectively LTE antenna provided in an embodiment of the present invention front view,
Rearview.LTE antenna 50 includes the second substrate 51, is connected to the first radiator 53 of grounding point 52 and is connected to feeding point 54
The second radiator 55, the first radiator 53 be connected with the second radiator 55 ground connection is printed on the first face of the second substrate 51,
The working frequency range of first radiator 53 is lower than the working frequency range of the second radiator 55.Wherein, the bottom margin of the second substrate 51 is set
There are the left welding ends, middle welding ends, right welding ends for being welded in active circuit plate 30, wherein feeding point 54 is located at left welding
On end, left welding ends is electrically connected to the signal input part of active circuit plate 30, the first radiation branch of the first radiator 53
One end is arranged on middle welding ends, and the other end is connected ground connection setting with grounding point 52 on right welding ends, active circuit plate 30
The signal input part radio signal transmission that receives LTE antenna to amplifying circuit carry out signal amplification, then pass through cable
Component is transmitted to vehicle main frame.
In one embodiment, referring to shown in Fig. 4 and Fig. 5, Fig. 4 and Fig. 5 are respectively the front view of AM/FM antenna with after
View, first substrate 41 are in chamfer trapezium structure, and spiral radiation body 42 includes multiple conducting line segments, and multiple conducting line segments are laterally staggered
It is printed on the two sides of first substrate 41, and the via hole that first substrate 41 is passed sequentially through between multiple conducting line segments is connected.Its
In, multiple via hole correspondences are arranged in the straight flange portion and bevel edge portion of PCB substrate 11.Specifically, first substrate 41 has phase
Pair top margin portion and bottom side portion, the straight flange portion (i.e. the height of right-angled trapezium) that is connected between top margin portion and bottom side portion and bevel edge
Portion, the length in top margin portion are greater than the length of bottom side portion.Feed arm 43 is disposed longitudinally on the face TOP of first substrate 41 and the bottom of close to
The edge side of edge, spiral radiation body 42 are connected on the face TOP of first substrate 41 with feed arm 43.It is being embodied
When, first substrate can be dimensioned to: ratio between bottom side portion length and top margin minister degree and straight flange portion close to
2:3:3, material FR-4, relative dielectric constant ε r is 4.3, with a thickness of 1.6mm.
Preferably, the material of spiral radiation body is copper foil.Thus copper foil material printed antenna is used, so that AM/FM antenna
Cost of manufacture it is lower and have preferable conductive characteristic, in addition, copper foil outside be also covered with green oil, with ensure spiral radiation body not by
Oxidation.
Preferably, the line width of multiple conducting line segments is all the same, and the line width value range of conducting line segment can be 1.0mm to 1.2mm,
Preferably, the line width value of conducting line segment is 1.1mm, is avoided due to PCB substrate ruler when so can be larger to avoid online wide value
Very little limitation and the helical length that not can guarantee AM/FM antenna, at the same can also be smaller to avoid online wide value when AM/FM days
Line is limited by PCB printing technology and can not be printed.
In the present embodiment, by by the substrate design of AM/FM antenna at chamfer trapezium structure, can preferably with shark
The top shape of fin antenna house is adapted, so as to more effectively utilize limited space inside shark fin type antenna cover；
In addition, the substrate due to AM/FM antenna is in chamfer trapezium structure, the wiring area on substrate can be so made full use of, is had
Effect ground improves the electrical length of antenna.
In one embodiment, referring to shown in Fig. 6 to Fig. 8, Fig. 6 to Fig. 8 is respectively the vertical of the loaded member of AM/FM antenna
Body structure chart, front view and side view.The substantially inverted V shaped structure of loaded member 44.Preferably, the material of loaded member 44 is C67S
Steel.By the way that loaded member is designed as inverted V-shaped structure, to be adapted with shark fin type antenna cover top shape, it is possible thereby to more have
Effect ground utilizes space limited inside shark fin type antenna cover.
In one embodiment, with continued reference to shown in Fig. 6 to Fig. 8, loaded member 44 includes clamping part 441, the first side
442 and second side 443, the two sides of clamping part 441, clamping part is asymmetrically arranged in the first side 442 and the second side 443
441 have the holding tank for clamping the top of first substrate 41.Specifically, the first side 442 is located at first substrate 41
The surface side Top, the second side 443 are located at the surface side Bottom of PCB substrate 41.First side 442, the second side 443 are substantially
Inverted trapezoidal structure, and the height value of the first side 442 is lower than the height value of the second side 443.Deviate the first base in the first side 442
The angle of plate 41 is first angle, and the angle that PCB substrate 41 is deviateed in the second side 443 is second angle, first angle and second
Angle can be identical or different.In the specific implementation, the top edge of the top edge length of the first side 442 and the second side 443
Length is identical, is slightly less than top margin minister's degree of first substrate 41, the feather edge length of the second side 443 and the second side 443
Top edge length ratio close to 4:5, the top edge length of the whole height of loaded member 44 and the first side 442 is close to 1:
2.First side 442, the second side 443 are respectively corresponded equipped with a transverse concave groove (in figure unlabeled), so, it is ensured that PCB
Substrate stress balance, so that loaded member is more securely welded on the top of PCB substrate.
In addition, the both ends of clamping part 44 are respectively corresponded equipped with a lug boss 444, the top both ends of first substrate 41 are set respectively
There is a pad, one of them in two pads is connected with spiral radiation body 42, and two lug bosses 444 are corresponding with two pads
Welding.In this way, loaded member and spiral radiation body are electrically connected, not only may be used by the way that loaded member to be welded in PCB substrate
Fully to utilize limited space in shark fin type antenna cover, and the capacitive reactance of AM/FM antenna can be improved, increases antenna spoke
Radio resistance, thus significantly improves the efficiency of antenna and the bandwidth of work, can obtain the effect of the good signal quality of reception.
In the present embodiment, since AM frequency range is 520KHz to 1.71MHz, FM frequency range is 87MHz to 108MHz, shark fins
The size of radio reception antenna is much smaller (AM wavelength 300m or so@1MHz, FM wavelength compared to the wavelength of its work
3m or so@100MHz), it is a kind of typical electronically small antenna, according to the radiation characteristic of electronically small antenna, can be equivalent to connect
RLC resonance circuit, the calculation formula of antenna figure of merit Q are as follows:It therefore is drop low reactance-resistance ratio
To improve bandwidth of operation and antenna radiation efficiency, needs to increase antenna capacitive reactance (for offsetting induction reactance) or increase radiation resistance.And
In the embodiment of the present invention, since AM/FM antenna is using the form of the printed spiral antenna in PCB substrate, and dexterously in PCB base
The top setting impedance operator of plate is the loaded member of capacitive, and structure is simple, can not only increase antenna capacitive reactance, can offset spiral
The emotional resistance of antenna, so that impedance matching is preferably carried out, so that in a limited space, the radiation of antenna can be effectively improved
Efficiency and bandwidth of operation, and the effect of the good signal quality of reception can be obtained.
In one embodiment, with continued reference to shown in Fig. 3 a, the second substrate 51 has left lateral and the right portion, is connected to
Upper edge and lower edge between left lateral and the right portion, feeding point 54 and grounding point 52 are arranged in lower edge；First radiation
Body 53 surrounds the edge distribution of lower edge, the right portion and upper edge, and the second radiator 55 is from the edge of left lateral towards the right portion
Edge direction extend to be connected to the first radiator 53.
Specifically, the second substrate 51 has the opposite face TOP and the face Bottom, and the face TOP is the first face, and the face Bottom is the
Two faces, grounding point 52, the first radiator 53, feeding point 54 and the second radiator 55 are set on the face TOP of the second substrate 51,
In, grounding point 52 and feeding point 54 are separately positioned on the bottom left and right ends in the face TOP, and the working frequency range of the first radiator 53 is
698MHz-960MHz, the working frequency range of the second radiator 55 are 1427.9MHz-2690MHz.
With continued reference to shown in Fig. 3 a, the second substrate 51 has left lateral and the right portion, be connected to left lateral and the right portion it
Between upper edge and lower edge, wherein feeding point 54 and grounding point 52 are arranged in lower edge；First radiator 53 is around following
The edge distribution in portion, the right portion and upper edge, edge direction of second radiator 50 from the edge of left lateral towards the right portion are prolonged
It stretches to be connected to the first radiator 30.
With continued reference to shown in Fig. 3 a, the first radiator 53 includes the radiation point of sequentially connected first radiation branch 531, second
Branch 532 and third radiation branch 533, the first radiation branch 531, the second radiation branch 532 and third radiation branch 533 are right respectively
It should be distributed on the edge of lower edge, the right portion and upper edge；Wherein, the width of the first radiation branch 531 is greater than the second radiation
The width of branch 532, and the width of the first radiation branch 531 is less than the width of third radiation branch 533.In the specific implementation,
The width value range of first radiation branch 531 can be 1.4mm to 1.6mm, the width value range of the second radiation branch 532
It can be 0.3mm to 0.5mm, the width value range of third radiation branch 533 can be 3.8mm to 4.0mm.
With continued reference to shown in Fig. 3 a, the second radiator 55 includes radiating principal 551 interconnected and extension 552, is prolonged
Extending portion 552 is connected to the first radiator 53；Wherein, radiating principal 551 is to cut three squares thereon by a rectangular-shaped metallic object
Shape angle and the multilateral shape formed, the area of rectangular-shaped metallic object are greater than the half of the area of PCB substrate 51；Extension 552 is
One rectangular configuration.Preferably, the material of rectangular-shaped metallic object is copper foil, by using printing of the copper foil material in PCB substrate
Antenna, so that vehicle-mounted LTE antenna cost of manufacture is lower and has preferable conductive characteristic.In the specific implementation, rectangular-shaped metal
The width value range of body is 22.8mm to 23.0mm, the length value range of rectangular-shaped metallic object be 38.2mm extremely
38.4.0mm.The transverse width of extension 52 is 3.4mm to 3.6mm.
With continued reference to shown in Fig. 3 a, three rectangular angulars be located at the top left region of rectangular-shaped metallic object, lower left region and
Lower right area.For ease of description, three rectangular angulars are respectively the upper left corner, the lower left corner, the lower right corner, wherein the lower left corner is from rectangle
The rectangular angular that cutout goes out in the lower left region of shape metallic object, and cutout falls the remainder behind the lower left corner and is connected in lower left region
Feeding point.In addition, the area in the upper left corner is maximum in three rectangular angulars, the area in the lower right corner is minimum.
With continued reference to shown in Fig. 3 a, the structure in a rectangular trapezoid of the second substrate 51.Specifically, the left side of the second substrate 51
Portion, the right portion, lower edge, upper rim portion are not used as top, bottom, height and the bevel edge of ladder structure of right angle.It in the specific implementation, can be with
By being dimensioned to for the second substrate: close to 4:3:6, material is the ratio between left lateral and following minister's degree and the right portion
FR-4, relative dielectric constant ε r are 4.3, with a thickness of 1.6mm.Right angle ladder is designed to from there through by the second substrate of LTE antenna
Shape structure can be preferably adapted with the top shape of shark fin type antenna cover, so as to more effectively utilize shark fins
Limited space inside formula antenna house.
Referring to shown in Fig. 3 b, LTE antenna further includes the parasitic body 56 being printed on the second face of PCB substrate 51, the second face
Opposite with the first face, parasitic body 56 is electrically connected at grounding point 52.
Wherein, parasitic body 56 is in rectangle and the fringe region for being disposed longitudinally on the second face.In the specific implementation, parasitic body 56
Transverse width value be 3.4mm to 3.6mm, longitudinal length value range be 8.1mm to 8.5mm.The present embodiment passes through introducing
Parasitic body can further broaden the bandwidth of LET antenna.
LTE antenna provided in an embodiment of the present invention is printed on by the way that the first radiator and the second radiator are connected to be grounded
On first face of the second substrate, i.e., by the way of single side radiation, and by the way that the first radiator is connected to grounding point, respectively
Two radiators are connected to feeding point, and thus not only antenna volume is smaller, and due to the first radiator with the second radiator to stitch
The mode of gap load generates two frequency ranges of 900MHz and 1800MHz, can be realized the effect of radiation multiband, while also can be effective
The bandwidth for broadening two high frequencies of antenna, effectively improves antenna receptivity.
In one embodiment, washer, the material of washer are additionally provided between shark fin type antenna cover 10 and antenna base 20
Material is the styrene plastic for the thermoplastic elastomer (TPE) that hardness is 65 ± 5, with a thickness of 3.5mm, is suitable for top cover metal plate curvature half
Diameter range is 5200mm-11500mm.In addition, antenna base 20, which is equipped with, confines device.Device support will be confined by fixing screws
It opens, so that antenna base can contact well with the roof metal plate of automobile, mounting torque 6NmAD18.
Illustrate antenna performance of the AM/FM antenna provided by the invention in AM frequency range in conjunction with Fig. 9 and Figure 10.In Fig. 9,
Abscissa is frequency (MHz), and ordinate is gain (dB), is all larger than in the yield value of 520KHz-1.71MHz frequency range internal antenna
4dB.In Figure 10, abscissa is frequency (MHz), and ordinate is return loss (dB), the day in 520KHz-1.71MHz frequency range
The return loss of line is respectively less than -13dB.By Fig. 9 and Figure 10 it is found that AM/FM antenna provided by the invention can be real in AM frequency range
Existing high-gain, while there is wider bandwidth, and there is preferable impedance matching.
Illustrate antenna performance of the AM/FM antenna provided by the invention in FM frequency range in conjunction with Figure 11 and Figure 12.In Figure 11
In, abscissa is frequency (MHz), and ordinate is gain (dB), and in Figure 12, abscissa is frequency (MHz), and ordinate is echo
It is lost (dB), by Figure 11 and Figure 12 it is found that AM/FM antenna provided by the invention can be realized high-gain in FM frequency range, simultaneously
With wider bandwidth, and there is preferable impedance matching.
Illustrate antenna performance of the vehicle-mounted LTE antenna provided by the invention in LTE frequency range in conjunction with Figure 13.In Figure 13,
Abscissa is frequency (MHz), and ordinate is return loss (dB), in 698MHz-960MHz frequency range and 1427.9MHz-
The return loss of 2690MHz frequency range internal antenna, which is substantially all, is less than -10dB.As seen from Figure 13, provided by the invention vehicle-mounted
LTE antenna can be realized the effect of radiation multiband, while can also effectively broaden the bandwidth of two high frequencies of antenna, effectively improve
Antenna receptivity.
Illustrate the isolation of AM/FM antenna and LTE antenna provided by the invention in conjunction with Figure 14.In Figure 14, abscissa
For frequency (MHz), ordinate is isolation (dB), and the isolation of AM/FM antenna and LTE antenna is in 698MHz-960MHz frequency range
And both greater than 40dB in 1427.9MHz-2690MHz frequency range, it can satisfy isolation technical requirement.
Illustrate the isolation of satellite navigation aerial provided by the invention and LTE antenna in conjunction with Figure 15.In Figure 15, horizontal seat
It is designated as frequency (MHz), ordinate is isolation (dB), and the isolation of satellite navigation aerial and LTE antenna is in 698MHz-960MHz
Frequency range is greater than 63dB, and 21dB is greater than in 1427.9MHz-2690MHz frequency range, can satisfy isolation technical requirement.
All the above alternatives can form alternative embodiment of the invention using any combination, herein no longer
It repeats one by one.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of shark fins antenna module, which is characterized in that including shark fin type antenna cover and antenna base, the antenna base
It is inside fixed with active circuit plate, AM/FM antenna and LTE antenna, the active electricity are vertically and fixedly provided on the active circuit plate
Satellite navigation aerial is horizontally fixed on the plate of road；
The AM/FM antenna includes first substrate, spiral radiation body, feed arm and loaded member, the spiral radiation body and described
Feed arm is printed on the first substrate, and the loaded member is arranged on the top of the first substrate, the spiral radiation
One end of body is connected to the feed arm, and the other end of the spiral radiation body is connected to the loaded member；
The LTE antenna includes the second substrate, is connected to the first radiator of grounding point and is connected to the second spoke of feeding point
Beam, first radiator and second radiator, which are connected to be grounded, to be printed on the first face of the second substrate, described
The working frequency range of first radiator is lower than the working frequency range of second radiator.
2. shark fins antenna module according to claim 1, which is characterized in that the first substrate is in the trapezoidal knot of chamfer
Structure, the spiral radiation body include multiple conducting line segments, and the multiple conducting line segment is laterally staggered to be printed on the two of the first substrate
The via hole that the first substrate is passed sequentially through on face, and between the multiple conducting line segment is connected.
3. shark fins antenna module according to claim 1 or 2, which is characterized in that the substantially inverted V shaped knot of the loaded member
Structure.
4. shark fins antenna module according to claim 3, which is characterized in that the loaded member includes clamping part, first
The two sides of the clamping part are asymmetrically arranged in side and the second side, first side and second side, described
Clamping part has the holding tank for clamping the top of the first substrate.
5. shark fins antenna module according to claim 1, which is characterized in that the second substrate has left lateral and the right side
Edge, the upper edge and lower edge being connected between the left lateral and the right portion, the feeding point and the grounding point
It is arranged in the lower edge；
First radiator surrounds the edge distribution of the lower edge, the right portion and the upper edge, second spoke
Edge direction of the beam from the edge of the left lateral towards the right portion extends to be connected to first radiator.
6. shark fins antenna module according to claim 5, which is characterized in that first radiator includes being sequentially connected
The first radiation branch, the second radiation branch and third radiation branch, first radiation branch, second radiation branch and
The third radiation branch, which respectively corresponds, to be distributed on the edge of the lower edge, the right portion and the upper edge；
The width of first radiation branch is greater than the width of the second radiation branch, and the width of first radiation branch is less than
The width of the third radiation branch.
7. shark fins antenna module according to claim 5, which is characterized in that second radiator includes being connected with each other
Radiating principal and extension, the extension is connected to first radiator；
Wherein, the radiating principal is the multilateral shape for being cut three rectangular angulars thereon by a rectangular-shaped metallic object and being formed,
The area of the rectangular-shaped metallic object is greater than the half of the area of the second substrate.
8. shark fins antenna module according to claim 7, which is characterized in that three rectangular angulars are located at described
Top left region, lower left region and the lower right area of rectangular-shaped metallic object.
9. according to the described in any item shark fins antenna modules of claim 5 to 8, which is characterized in that the second substrate is in straight
Angle trapezium structure.
10. shark fins antenna module according to claim 9, which is characterized in that the LTE antenna further includes being printed on institute
The parasitic body on the second face of the second substrate is stated, second face is opposite with first face, and the parasitic body is electrically connected at
The grounding point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507850.5A CN109473787B (en) | 2018-12-11 | 2018-12-11 | Shark fin antenna assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507850.5A CN109473787B (en) | 2018-12-11 | 2018-12-11 | Shark fin antenna assembly |
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| CN109473787A true CN109473787A (en) | 2019-03-15 |
| CN109473787B CN109473787B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811507850.5A Active CN109473787B (en) | 2018-12-11 | 2018-12-11 | Shark fin antenna assembly |
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| CN110224233A (en) * | 2019-04-26 | 2019-09-10 | 安费诺三浦（辽宁）汽车电子有限公司 | A kind of car antenna |
| CN113964499A (en) * | 2021-11-12 | 2022-01-21 | 人民华智通讯技术有限公司 | Vehicle-mounted antenna unit |
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Also Published As
| Publication number | Publication date |
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| CN109473787B (en) | 2023-10-27 |
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