CN103094682A - Vehicle-mounted antenna and manufacturing method thereof - Google Patents
Vehicle-mounted antenna and manufacturing method thereof Download PDFInfo
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- CN103094682A CN103094682A CN2013100349022A CN201310034902A CN103094682A CN 103094682 A CN103094682 A CN 103094682A CN 2013100349022 A CN2013100349022 A CN 2013100349022A CN 201310034902 A CN201310034902 A CN 201310034902A CN 103094682 A CN103094682 A CN 103094682A
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Abstract
The invention discloses a vehicle-mounted antenna and a manufacturing method of the vehicle-mounted antenna. The vehicle-mounted antenna comprises a shell body and an antenna radiating portion, wherein the shell body is provided with a cavity, the antenna radiating portion is arranged in the cavity, and the antenna radiating portion is formed through the laser direct structuring (LDS) technology. Because the cavity of the shell body of the vehicle-mounted antenna is provided with the antenna formed through the LDS technology, the antenna is not high, and not easy to break off, and generates no noise. The antenna is formed through the LDS technology, and is in an integrated structure. Unlike a bar-like antenna which is directly bent in the prior art, the vehicle-mounted antenna is good in performance.
Description
Technical field
The present invention relates to antenna, relate in particular to car antenna on transport facilitys such as being applied to vehicle and the manufacture method of car antenna.
Background technology
Traditional car antenna (comprising AM/FM) is bar antenna, and the spiral form that usually adopts copper cash to be coiled into is highly about more than 400 millimeters, the defective of this antenna is highly too high, be easy to fracture, and vehicle is in running at high speed, antenna can produce noise, has a strong impact on reception.Although and some car antenna uses the antenna that hangs down section now, but normally bar-shaped helical antenna is directly bent, although the height of antenna reduces like this, but antenna electric performance (comprises bandwidth, gain) very poor, even antenna can't use, and thisly realizes the mode of highly reduction by the bar-shaped helical antenna of bending effect is limited after all, can not adapt to the requirement of antenna miniaturization.
Summary of the invention
The problem that the present invention solves is the problem that existing antenna easily fractureed, produced noise and poor performance.
For addressing the above problem, the invention provides a kind of car antenna, this car antenna comprises housing and the aerial radiation section that forms by LDS technique, and this housing has cavity, and described aerial radiation section is arranged in described cavity.
Alternatively, described car antenna also comprises interior supporting, and supporting has outer surface in this, and described aerial radiation section forms the outer surface of interior supporting by LDS technique, and in this, supporting and aerial radiation section are positioned at the described cavity that is coated on.
Alternatively, described aerial radiation section is by around interior supporting side spiralling spiral radiation section with the top loading helical antenna that in covering at least, the top Department of Radiation of supporting end face consists of.
Alternatively, described aerial radiation section comprises around the spiral radiation section of the internal face spiral winding of housing and is positioned at the top Department of Radiation of roof of the cavity of housing, and described spiral radiation section is the slip helical form, and puts to the top disc winding from the bottom of housing.
Alternatively, the live width of the spiral radiation section of described antenna is at 1.5mm～2mm, and pitch is 9mm～11mm, and length is 700mm～800mm.
Alternatively, described cavity is the shark fin-shaped, and reduces gradually to the top from the bottom of housing; Described interior supporting is the shark fin-shaped.
Alternatively, the surface-coated of described antenna has the UV protective layer.
The present invention also discloses a kind of manufacture method of car antenna, and this manufacture method comprises the steps: (A), forms the housing with cavity; (B), by LDS technique formation aerial radiation section; (C), antenna and described housing are assembled into car antenna.
Alternatively, describedly form antenna by LDS technique and specifically comprise the steps: (B1), form described interior supporting by Shooting Technique; (B2), described interior supporting is carried out laser activation and form the pattern of described antenna on interior supporting surface; (B3), to the interior supporting of pattern with antenna electroplate and on described pattern plated metal, form described car antenna.
Alternatively, this manufacture method also is included in the surface spraying UV glue of described aerial radiation section, then with the UV glue of ultraviolet ray irradiation spraying 3 minutes～5 minutes.
Compared with prior art, the present invention has the following advantages:
1, the aerial radiation section due to car antenna of the present invention forms and is arranged in the cavity of housing by LDS technique, like this, low and the frangibility not of antenna height, can not produce noise, owing to forming by LDS technique, be integrative-structure, unlike prior art, bar antenna directly bent, antenna performance is good.
2, due to car antenna of the present invention by interior supporting is set, described aerial radiation section is formed at the outer surface of described interior supporting by LDS technique, then make interior supporting be positioned at the cavity of housing, like this, car antenna of the present invention is low to the process equipment required precision, and easily processing, be conducive to industrialization and produce manufacturing in enormous quantities.
3, because antenna of the present invention is the helical antenna that the top loads, like this, make that antenna gain is high, bandwidth, radiation efficiency is high and return loss is little, the live width of the spiral radiation section of the helical antenna that loads when the top is at 1.5mm～2mm, pitch is 9mm～11mm, and length is 700mm～800mm, and the frequency band of antenna can be at 87.5MHz to 108MHz, antenna gain and radiation efficiency are the highest, and return loss is minimum.
4, at antenna surface spraying UV compound protective layer, it is stronger that antenna bears outside border performance, and such as high low temperature, humidity can not affect the performance of antenna in the situations such as salt fog.With ultraviolet ray irradiation 3～5 minutes, can guarantee so that UV glue solidifies faster the performance of UV glue.
Description of drawings
Fig. 1 is the structural representation of the car antenna of the first embodiment of the present invention;
Fig. 2 is the structural representation of the car antenna of the second embodiment of the present invention;
Fig. 3 is the three-dimensional exploded view of an angle of car antenna shown in Figure 2;
Fig. 4 is the three-dimensional exploded view of another angle of car antenna shown in Figure 2.
Embodiment
By describing technology contents of the present invention, structural feature in detail, being reached purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be described in detail.
See also Fig. 1, it is the structural representation of the first way of example of car antenna of the present invention.This car antenna comprises the housing 1 of plastic cement material and is arranged at the aerial radiation section 2 of this housing 1 inner surface.
Described housing 1 is the shark fin-shaped, and has cavity (not label).Described aerial radiation section 2 is spiral winding on the internal face of this housing 1.Concrete is is formed on the internal face of cavity of housing 1 by laser direct forming technique (Laser Direct structuring is called for short LDS).Form described aerial radiation section 2 and can adopt following steps: the described housing 1 with cavity of (1), injection mo(u)lding; The raw material of housing 1 can adopt the modified thermoplastic material (such as, Chinese patent application the 201220366886.8th is called active plastics) for raw material, this raw material inside has densely covered metal ion.(2), the internal face of the cavity of the described housing of laser activation forms the pattern of aerial radiation section 2 with the internal face at the cavity of housing; In this step, laser can make the metal ion in housing become the metal ion of activation and be clouded on the internal face of described housing, and the metal ion of this activation is used as the reducing agent in electroplating technology.(3), electroplate the housing with aerial radiation section 2 patterns, thereby form described aerial radiation section 2.In this embodiment,, bandwidth high for the gain that makes antenna, radiation efficiency is high and return loss is little, the helical antenna that aerial radiation section 2 adopts the top to load comprises around the spiral radiation section 21 of the internal face spiral winding of the cavity of housing 1 and is positioned at the top Department of Radiation 22 of roof of the cavity of housing 1.Described spiral radiation section 21 is the slip helical form, and puts to the top disc winding from the bottom of housing 1.By adjusting slip width and the interval pitch of spiral radiation section 21, can adjust frequency bandwidth and the radiation efficiency of whole antenna, such as, the live width of the spiral radiation section of described antenna is at 1.5mm～2mm, pitch is 9mm～11mm, when length is 700mm～800mm, the frequency band of car antenna at 87.5MHz to 108MHz.
In above-mentioned car antenna, because aerial radiation section 2 is formed on the internal face of housing by LDS technique, so have following advantage: (1), antenna height is low and frangibility and to make car antenna take up space little not; (2), antenna can not produce because of high vehicle speeds noise yet; (3), aerial radiation section 2 is not direct bending as prior art, thereby, can guarantee the performance of antenna.
although the car antenna that forms by LDS technique has above-mentioned advantage, yet the technical staff finds that cavity when the housing of described car antenna is when the bottom of housing reduces gradually to the top, such as, the bottom reduces gradually to the top and when being the shark fin-shaped, when forming antenna, the internal face of housing can have problem high to the process equipment required precision and that processing is inconvenient with LDS technique, particularly less the closer to cavity top time space, processing is inconvenient and more serious to the high problem of process equipment precision, such as, in the laser activation step, cavity diminishes gradually and can make the width of antenna pattern deviation occur, and then, error appears in the live width of antenna, so, need high-precision process equipment deviation not occur with the size of guaranteeing antenna, in addition, the space diminish gradually and cavity inner wall stop that to make processing more and more inconvenient.
Situation in view of above the first embodiment, the inventor proposes preferred the second embodiment, see also Fig. 2 to Fig. 4, the car antenna of second embodiment of the invention is except the advantage of car antenna with first way of example, also have advantages of the process equipment required precision lowly and easy to process, the car antenna of the present embodiment comprises housing 1, interior supporting 3 and aerial radiation section 2.Described housing 1 has cavity 11, and described cavity 11 13 reduces to the top gradually from the bottom 12 of housing 1, and in the present embodiment, cavity 11 13 is reduced to the shark fin-shaped from the bottom 12 of housing 1 gradually to the top.Described interior supporting 3 is plastic cement material, and supporting 3 has end face and side and is the shark fin structure, the outer surface of supporting 3 in described end face and side consist of in this.Described aerial radiation section 2 is formed at the outer surface of described interior supporting 3 by LDS technique.
In the present embodiment, described interior supporting 3 is positioned at cavity 11 inside of housing 1, is formed at the surface of interior supporting 3 due to aerial radiation section 2, so, aerial radiation section 2 also is positioned at cavity 11, that is to say, interior supporting 3 and aerial radiation section 2 are coated in the cavity 11 of described housing 1.The step of outer surface that aerial radiation section 2 is formed at interior supporting 3 is as follows: (1), form described interior supporting 3 by Shooting Technique; In this step, it is raw material that the raw material of interior supporting 3 can adopt the modified thermoplastic material, and this raw material inside has metal ion; (2), the described interior supporting 3 of laser activation and form the pattern of described aerial radiation sections 2 on interior supporting 3 surfaces; In this step, laser can make the metal ion of interior supporting 3 become the metal ion of activation, and this metal ion is as the reducing agent in electroplating technology; (3), the interior supporting 3 of electroplating the pattern with aerial radiation section 2 forms described car antenna with plated metal on described pattern; In this step, there is the place of metal ion electroplated and deposit upper metal, the place of non-metallic ion can't be deposited metal by plating, forms described aerial radiation section 2 by this electroplating technology.After formation aerial radiation section 2, injection moulding forms described housing with cavity.After forming housing, housing and aerial radiation section 2 are fitted together so that aerial radiation section 2 and interior supporting 3 are coated in the cavity of described housing 1.
In present embodiment, adopt the helical antenna that the top loads can be so that the bandwidth of car antenna, gain is high, radiation efficiency is high and return loss is little.For the frequency band that makes aerial radiation section 2 the highest to 108MHz, antenna gain and radiation efficiency at 87.5MHz, and return loss is minimum, the live width of described spiral radiation section 21 at 1.5mm～2mm(such as 1.5,1.6,1.8,1.9), pitch D is that 9mm～11mm(is such as 9,9.5,10,10.5,11), length is that 700mm～800mm(is such as 70,71,72,73,74,76,78,80).In addition; the surface-coated of aerial radiation of the present invention section 2 has the UV protective layer; this protective layer is formed at the surface of aerial radiation section 2 after electroplate forming described aerial radiation section 2; concrete steps are as follows: the surface spraying UV glue in aerial radiation section 2; then; shine UV glue and made in 3 minutes～5 minutes by ultraviolet ray the surface that the UV gelling is fixed in aerial radiation section 2; it is stronger that the UV protective layer makes car antenna bear outside border performance; such as; at high low temperature; humidity can not affect the performance of car antenna in the situation of salt fog etc.
In sum, car antenna of the present invention not only effectively reduces antenna height, and has improved the anti-performance that fractures of antenna by adopting LDS technique to form aerial radiation section 2 in the cavity of the housing of shark fin-shaped, also can not produce noise.For better beneficial effect is arranged, the present invention also is provided with interior supporting 3, by the aerial radiation 2LDS of section being taken shape in the outer surface of interior supporting 3, the precision that has produced when effectively having solved the internal face that aerial radiation in the first execution mode section 2 takes shape in housing 1 is inaccurate, be difficult for processing and to the problem of process equipment precision high request.In addition, because car antenna of the present invention is the helical antenna that the top loads, like this, make that antenna gain is high, bandwidth, radiation efficiency is high and return loss is little.At last, at antenna surface spraying UV compound protective layer, it is stronger that antenna bears outside border performance, such as, at high low temperature, humidity, the weather condition of salt fog etc. all can not affect the performance of antenna.
Claims (10)
1. car antenna, comprise housing, and this housing has cavity, it is characterized in that: described car antenna also comprises the aerial radiation section that forms by LDS technique, and described aerial radiation section is arranged in described cavity.
2. car antenna according to claim 1, it is characterized in that: described car antenna also comprises interior supporting, described interior supporting has outer surface, described aerial radiation section is formed at the outer surface of interior supporting by LDS technique, in this, supporting and aerial radiation section are coated in the cavity of described housing.
3. car antenna according to claim 2 is characterized in that: described aerial radiation section is by around interior supporting side spiralling spiral radiation section with the top loading helical antenna that in covering at least, the top Department of Radiation of supporting end face consists of.
4. car antenna according to claim 1, it is characterized in that: described aerial radiation section comprises around the spiral radiation section of the internal face spiral winding of housing and is positioned at the top Department of Radiation of roof of the cavity of housing, described spiral radiation section is the slip helical form, and puts to the top disc winding from the bottom of housing
5. according to claim 3 or 4 described car antennas is characterized in that: the live width of the spiral radiation section of described antenna is at 1.5mm～2mm, and pitch is 9mm～11mm, and length is 700mm～800mm.
6. car antenna according to claim 1, it is characterized in that: described cavity is the shark fin-shaped, and reduces gradually to the top from the bottom of housing; Described interior supporting is the shark fin-shaped.
7. car antenna according to claim 1, it is characterized in that: the surface-coated of described antenna has the UV protective layer.
8. the manufacture method of car antenna is characterized in that: this manufacture method comprises the steps: (A), forms the housing with cavity; (B), by LDS technique formation aerial radiation section; (C), aerial radiation section and described housing are assembled into car antenna.
9. the manufacture method of car antenna according to claim 8 is characterized in that: describedly form antenna by LDS technique and specifically comprise the steps:
(B1), form described interior supporting by Shooting Technique;
(B2), described interior supporting is carried out laser activation and form the pattern of described aerial radiation section on interior supporting surface;
(B3), to the interior supporting of pattern with aerial radiation section electroplate and on described pattern plated metal, form described car antenna.
10. the manufacture method of car antenna according to claim 8 is characterized in that: this manufacture method also is included in the surface spraying UV glue of described aerial radiation section, then with the UV glue of ultraviolet ray irradiation spraying 3 minutes～5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034902.2A CN103094682B (en) | 2013-01-30 | 2013-01-30 | Vehicle-mounted antenna and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310034902.2A CN103094682B (en) | 2013-01-30 | 2013-01-30 | Vehicle-mounted antenna and manufacturing method thereof |
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| CN103094682A true CN103094682A (en) | 2013-05-08 |
| CN103094682B CN103094682B (en) | 2015-07-01 |
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Cited By (6)
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| CN104167603A (en) * | 2014-08-22 | 2014-11-26 | 上海安费诺永亿通讯电子有限公司 | Vehicle-mounted shark fin antenna structure and manufacturing method thereof |
| CN104241845A (en) * | 2013-06-21 | 2014-12-24 | 莱尔德技术股份有限公司 | Multiband mimo vehicular antenna assemblies |
| JP2016082492A (en) * | 2014-10-21 | 2016-05-16 | 知樹 仲里 | Antenna device for roof of motor car |
| CN109075433A (en) * | 2016-05-04 | 2018-12-21 | 福霸汽车电子有限公司 | Antenna protection cover for vehicle |
| CN111435764A (en) * | 2020-03-20 | 2020-07-21 | 上海阿莱德实业股份有限公司 | Preparation method of 5G base station antenna housing integrating antenna radiation unit and prepared antenna housing |
| CN112106257A (en) * | 2018-05-10 | 2020-12-18 | 株式会社Kmw | Dual-polarized antenna and antenna array |
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| CN103094682B (en) | 2015-07-01 |
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