CN204315719U - A kind of tuner-type microstrip antenna - Google Patents
A kind of tuner-type microstrip antenna Download PDFInfo
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- CN204315719U CN204315719U CN201420766544.4U CN201420766544U CN204315719U CN 204315719 U CN204315719 U CN 204315719U CN 201420766544 U CN201420766544 U CN 201420766544U CN 204315719 U CN204315719 U CN 204315719U
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Abstract
The utility model provides a kind of tuner-type microstrip antenna, and this antenna comprises: microband paste, feeding network, dielectric-slab, metal base plate, machine leader, tuning.Wherein microband paste, feeding network are positioned at dielectric-slab upper surface, and metal base plate is positioned at dielectric-slab lower surface, machine leader, tuning be attached on the same dieelctric sheet above microband paste.The vertically opposite distance of dieelctric sheet and microband paste is 2 ~ 20mm, and the horizontal relative distance of machine leader and tuning is 1 ~ 10mm, and the shape of machine leader is square or rectangle, preferably square.The shape of tuning is square or rectangle, preferred rectangle.The electromagnetic wave of the microband paste radiation of this antenna, machine leader and tuning produces induced current and secondary radiation occurs, and is reconstructed, improves 3dB lobe directions figure and the axial ratio of antenna to the directional diagram of microband paste radiation and power distribution.Effectively improve complex environment residing for micro-strip paster antenna, be applicable to the car glass of various vehicle.
Description
Technical field
The utility model relates to microwave antenna, particularly relates to the Antenna Design of vehicle carried electronic label in electronic toll system for road.
Background technology
In electronic toll system for road, antenna is as roadside unit (Road-Side Unit, be called for short RSU) receive and send the terminal of electromagnetic signal with vehicle carried electronic label (On Board Unit is called for short OBU), its performance directly has influence on region and the quality of communication.
In the application of actual vehicle carried electronic label, micro-strip paster antenna is widely used.Vehicle carried electronic label is generally attached on windscreen glass and uses, circumstance complication around micro-strip paster antenna, metal components and parts on circuit board residing for antenna, the windscreen glass in antenna front, capital produces larger impact to the performance of antenna, be mainly reflected in the impact of the 3dB lobe directions figure on antenna, axial ratio, cause the significantly reduction of communication transaction quality.
Due to the development trend of vehicle carried electronic label miniaturization, the space length between metal components and parts and antenna is more and more less, even occurs the possibility of space overlap.The reduction of space length causes these metal devices and microstrip antenna to there is mutual coupling effect, causes the radiance of antenna to change.
And automobile front windowpane is larger on the impact of antenna, for different car glass, thickness, dielectric constant, attenuation constant are all not quite similar, and its transmission capacity to antenna electromagnetic beam, diffusivity and damping capacity are also all different.Antenna electromagnetic beam is through car glass, and owing to there is dielectric interface, reflection and refraction can occur electromagnetic wave, thus change electromagnetic radiation direction, affect the pattern characteristics that antenna is final, main lobe offsets, secondary lobe and episternites sharply increase, and increase the interference of adjacent area.More serious situation can cause the major lobe of directional diagram to distort, and occurs much irregular " hole falls into ", occurs transaction blind area.Equally, the axial ratio of antenna is also subject to serious change, and circular polarized antenna becomes linear polarized antenna, directly affects and the proper communication of roadside unit and compatibility.
Therefore, improve metal components and parts, car glass etc. to have great importance on the 3dB lobe directions figure of vehicle carried electronic label antenna and the impact of axial ratio.
Utility model content
The purpose of this utility model is to provide a kind of tuner-type microstrip antenna.The electromagnetic wave of the microband paste radiation of this antenna, machine leader and tuning produces induced current and secondary radiation occurs, and is reconstructed, improves 3dB lobe directions figure and the axial ratio of antenna to the directional diagram of microband paste radiation and power distribution.
The purpose of this utility model is to provide a kind of tuner-type microstrip antenna, and this antenna comprises: microband paste, feeding network, dielectric-slab, metal base plate, machine leader, tuning.Wherein microband paste, feeding network are positioned at dielectric-slab upper surface, and metal base plate is positioned at dielectric-slab lower surface, machine leader, tuning be attached on the same dieelctric sheet above microband paste.The vertically opposite distance of dieelctric sheet and microband paste is 2 ~ 20mm, and the horizontal relative distance of machine leader and tuning is 1 ~ 10mm.The shape of machine leader is square, and foursquare size dimension is between 10 ~ 20mm.The shape of tuning is rectangle, and rectangular long limit size is between 10 ~ 20mm, and rectangular broadside size is between 1 ~ 8mm.
The beneficial effects of the utility model are, in the application of vehicle carried electronic label, the microstrip antenna on label is in complex environment, especially the glass of front side, can worsen the directional diagram of antenna, power distribution and axial ratio, affect the normal work of electronic tag.This microstrip antenna, can offset front side glass and around environment to the impact of antenna performance, improve 3dB lobe directions figure and the axial ratio of antenna, and go for the car glass of various vehicle.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described.
Fig. 1 is the stereogram of the vehicle carried electronic label antenna that the utility model embodiment relates to.
Fig. 2 is the vertical view of the vehicle carried electronic label antenna that the utility model embodiment relates to.
Fig. 3 is the end view of the vehicle carried electronic label antenna that the utility model embodiment relates to.
Fig. 4 is the axial ratio comparison diagram of the microstrip antenna that relates to of the utility model embodiment by car glass.
Fig. 5 is the directional diagram comparison diagram of the microstrip antenna that relates to of the utility model embodiment by car glass.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.
This embodiment is applied to vehicle carried electronic label, as shown in Figure 1,101 is microband paste, 102 is feeding network, and 103 is dielectric-slab, and 104 is the metal base plate of dielectric-slab lower surface, 107 is dieelctric sheet, 105 for being attached to the machine leader on dieelctric sheet, and 106 for being attached to tuning on dieelctric sheet, and 108 is vehicle carried electronic label shell.Fig. 2 is the vertical view of the vehicle carried electronic label antenna that the utility model embodiment relates to.Fig. 3 is the end view of the vehicle carried electronic label antenna that the utility model embodiment relates to.
The structural parameters of adjustment microstrip antenna, are optimized the performance of antenna, the good 3dB lobe directions figure of final acquisition and axial ratio.Wherein, dieelctric sheet (107) is 8.9mm with the vertically opposite distance of water of microband paste (101), and machine leader (105) is 2.35mm with the horizontal relative distance of tuning (106).The shape of machine leader (105) is square, is foursquarely of a size of 16mm*16mm, and the shape of tuning (106) is rectangle, is rectangularly of a size of 16mm*4mm.
Wherein there has been good mutual coupling effect machine leader (105), tuning (106) with microband paste (101), by the electromagnetic wave of coupling microstrip paster radiation, above produce induced current at machine leader (105) and tuning (106) and secondary radiation occurs, the directional diagram of microband paste (101) radiation and power distribution are reconstructed, when electromagnetic beam after reconstruct is by car glass, again affected by glass, change the direction of transmission.The reconstruct of twice pair of electromagnetic beam radiation direction, makes glass eliminate the influence of microband paste (101) antenna pattern.Wherein the adjustment of machine leader (105) affects comparatively large on the 3dB lobe directions figure of microband paste, can improve 3dB lobe directions figure, " hole falls into " that improvement windscreen glass brings antenna pattern main lobe; Tuning (106) axial ratio impact on microband paste is larger, the electromagnetic beam of microband paste radiation is after car glass, substantially present linear polarization characteristics, by the effect of tuning (106), electromagnetic beam can keep good circular polarization characteristics.
Fig. 4 is the axial ratio comparison diagram of actual measurement vehicle carried electronic label antenna by car glass, and curve 1 is the microstrip antenna A on common vehicle carried electronic label, through the axial ratio curve of glass; The microstrip antenna B on vehicle carried electronic label that curve 2 relates to for the utility model, through the axial ratio curve of glass.
As seen from Figure 4, microstrip antenna A is through glass, and antenna axial ratio severe exacerbation, loses the axial ratio performance of circular polarization, close to linear polarization; And microstrip antenna B is through glass, antenna axial ratio is all less than 3dB on main lobe direction, is still good circular polarization characteristics, ensure that application performance and the compatibility of microstrip antenna.
Fig. 5 is the directional diagram comparison diagram of actual measurement vehicle carried electronic label antenna by car glass, and curve 1 is the microstrip antenna A on common vehicle carried electronic label, through the directional diagram curve of glass; The microstrip antenna B on vehicle carried electronic label that curve 2 relates to for the utility model, through the directional diagram curve of glass.
Curve 1 can be found out, there is very large distortion in the directional diagram of microstrip antenna A, main lobe direction offsets, secondary lobe, episternites increase, and directional diagram occurs a lot " hole falls into ", and the directional diagram of the microstrip antenna B of curve 2, main lobe direction is without skew, episternites is little a lot, and directional diagram is smoother, and gain is also large than the antenna gain shown in curve 1.
This shows the deterioration of the 3dB lobe that tuner-type microstrip antenna that the utility model designs brings automobile front windowpane and axial ratio, has had good improvement result.
Claims (6)
1. a tuner-type microstrip antenna, comprises microband paste, feeding network, dielectric-slab, and metal base plate is characterized in that, this antenna also comprises: machine leader, tuning, and machine leader and tuning are attached on dieelctric sheet.
2. tuner-type microstrip antenna according to claim 1, is characterized in that, described dieelctric sheet is parallel to be positioned at directly over microband paste.
3. tuner-type microstrip antenna according to claim 1, is characterized in that, the vertically opposite distance of described dieelctric sheet and microband paste is between 2 ~ 20mm.
4. tuner-type microstrip antenna according to claim 1, is characterized in that, the horizontal relative distance of described machine leader and tuning is between 1 ~ 10mm.
5. tuner-type microstrip antenna according to claim 1, is characterized in that, the shape of described machine leader is square, and foursquare size dimension is between 10 ~ 20mm.
6. tuner-type microstrip antenna according to claim 1, is characterized in that, the shape of described tuning is rectangle, and rectangular long limit size is between 10 ~ 20mm, and rectangular broadside size is between 1 ~ 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766544.4U CN204315719U (en) | 2014-12-08 | 2014-12-08 | A kind of tuner-type microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766544.4U CN204315719U (en) | 2014-12-08 | 2014-12-08 | A kind of tuner-type microstrip antenna |
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| Publication Number | Publication Date |
|---|---|
| CN204315719U true CN204315719U (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420766544.4U Active CN204315719U (en) | 2014-12-08 | 2014-12-08 | A kind of tuner-type microstrip antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230839A (en) * | 2017-06-26 | 2017-10-03 | 广东欧珀移动通信有限公司 | Antenna tuning structure and mobile terminal |
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2014
- 2014-12-08 CN CN201420766544.4U patent/CN204315719U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230839A (en) * | 2017-06-26 | 2017-10-03 | 广东欧珀移动通信有限公司 | Antenna tuning structure and mobile terminal |
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| GR01 | Patent grant |