CN204271253U - A kind of microstrip antenna - Google Patents
A kind of microstrip antenna Download PDFInfo
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- CN204271253U CN204271253U CN201420765561.6U CN201420765561U CN204271253U CN 204271253 U CN204271253 U CN 204271253U CN 201420765561 U CN201420765561 U CN 201420765561U CN 204271253 U CN204271253 U CN 204271253U
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Abstract
The utility model provides a kind of microstrip antenna, and this antenna comprises: microband paste, feeding network, dielectric-slab, metal base plate, cross paster, correcting sheet.Wherein the vertically opposite distance of dieelctric sheet and microband paste is 2 ~ 20mm, cross paster is 1 ~ 10mm near the horizontal relative distance of the side of correcting sheet and correcting sheet, cross paster is the symmetry of two rectangles or a rectangle and a square composition or asymmetric cross structure, preferably the symmetrical cross structure of the rectangle composition of two same sizes.The shape of correcting sheet is square or rectangle, preferred rectangle.The electromagnetic wave of the microband paste radiation of this antenna, cross paster and correcting sheet produces induced current and secondary radiation occurs, the 3dB lobe width of broadening antenna.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 charging system without parking.
Background technology
ETC (Electronic Toll Collection) i.e. electronic charging system without parking is a kind of automatic electronic charging system being widely used in highway, bridge and tunnel in the world.ETC system is by being installed on board units (the On Board Unit on vehicle, be called for short OBU) and roadside unit (the Road-Side Unit that is arranged in toll station lane, be called for short RSU) between carry out radio communication and information exchange, antenna is the critical elements realizing this function.
In the application of actual vehicle carried electronic label, generally adopt micro-strip paster antenna.Vehicle carried electronic label is generally installed on the front screen in car, cause the close together of glass and antenna like this, namely glass is positioned at antenna near-field radiation areas, then glass becomes a part for antenna structure, add the impact of metal components and parts on circuit board residing for antenna, the performance of antenna occurs obviously to change, and be mainly reflected in the impact on antenna 3dB lobe directions figure, and the 3dB lobe width of antenna is the key factor affecting ETC system transaction area size.
Due to the market demand, vehicle carried electronic label development is tending towards miniaturized, space length between metal components and parts and antenna is more and more less, when space length is less, there is mutual coupling effect in metal device and microstrip antenna, and mutual coupling effect can cause antenna pattern, and great changes will take place, even occurs false lobe.And the impact of automobile front windowpane on antenna is larger, because glass itself is dielectric, refraction and reflection can be there is in antenna electric magnetic wave when passing this media face, thus change electromagnetic radiation direction, affect the pattern characteristics that antenna is final, the such as major lobe of directional diagram distorts, offsets, 3dB lobe width narrows, thus causing transaction coverage distance to diminish, Transaction Success rate declines, and is unfavorable for the practical application of ETC system.
Therefore, improve the 3dB lobe width impact on vehicle carried electronic label antenna such as metal components and parts, car glass to have great importance.
Utility model content
The purpose of this utility model is to provide a kind of microstrip antenna.The electromagnetic wave of the microband paste radiation of this antenna, cross paster and correcting sheet produce induced current and secondary radiation occurs, the directional diagram of microband paste radiation and power distribution are reconstructed, can by effective for the 3dB lobe width of antenna broadening 10 ° ~ 30 °.
The purpose of this utility model is to provide a kind of microstrip antenna, and this antenna comprises: microband paste, feeding network, dielectric-slab, metal base plate, cross paster, correcting sheet.Wherein microband paste, feeding network are positioned at dielectric-slab upper surface, and metal base plate is positioned at dielectric-slab lower surface, and cross paster and correcting sheet are attached on dieelctric sheet.The vertically opposite distance of dieelctric sheet and microband paste is 2 ~ 20mm, and cross paster is 1 ~ 10mm near the horizontal relative distance of the side of correcting sheet and correcting sheet.Cross paster is the symmetry of two rectangles or a rectangle and a square composition or asymmetric cross structure, the preferably symmetrical cross structure of the rectangle composition of two same sizes, rectangular long limit size is between 10 ~ 20mm, and rectangular broadside size is between 1 ~ 8mm.The shape of correcting sheet is square or rectangle, and preferred rectangle, 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, affect the normal work of electronic tag.This microstrip antenna, can offset front side glass and around environment to the impact of antenna performance, the 3dB lobe width of broadening antenna, and the car glass going for 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 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 cross paster on dieelctric sheet, and 106 for being attached to the correcting sheet 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 most at last 3dB lobe width broadening 25 °.Wherein, dieelctric sheet (107) is 8.9mm with the vertically opposite distance of water of microband paste (101), and cross paster (105) is 3.5mm near the side of correcting sheet (106) and the horizontal relative distance of correcting sheet (106).Cross paster (105) is made up of the rectangle of two same sizes, is rectangularly of a size of 14mm*4mm, and the shape of correcting sheet (106) is rectangle, is rectangularly of a size of 14mm*6mm.
Wherein cross paster (105), correcting sheet (106) have had good mutual coupling effect with microband paste (101), by the electromagnetic wave of coupling microstrip paster radiation, above produce induced current at cross paster (105) and correcting sheet (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.By debugging cross paster and correcting sheet, 3dB lobe width can broadening 25 °.
Fig. 4 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, directional diagram occurs obviously " hole falls into ", and the directional diagram of the microstrip antenna B of curve 2, main lobe direction is without skew, and directional diagram is smoother, gain is also large than the antenna gain shown in curve 1, the obvious broadening of 3dB width.
This shows that pattern distortion that the microstrip antenna that the utility model designs brings automobile front windowpane, 3dB broadband are narrower, has had good improvement result.
Claims (6)
1. a microstrip antenna, comprises microband paste, feeding network, dielectric-slab, and metal base plate is characterized in that, this antenna also comprises: cross paster, correcting sheet, and cross paster and correcting sheet are attached on dieelctric sheet.
2. microstrip antenna according to claim 1, is characterized in that, described dieelctric sheet is parallel to be positioned at directly over microband paste.
3. 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. microstrip antenna according to claim 1, is characterized in that, described cross paster near the horizontal relative distance of the side of correcting sheet and correcting sheet between 1 ~ 10mm.
5. microstrip antenna according to claim 1, it is characterized in that, described cross paster is the symmetry of two rectangles or a rectangle square composition or asymmetric cross structure, and rectangular long limit size is between 10 ~ 20mm, and rectangular broadside size is between 1 ~ 8mm.
6. microstrip antenna according to claim 1, is characterized in that, the shape of described correcting sheet 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 |
|---|---|---|---|
| CN201420765561.6U CN204271253U (en) | 2014-12-08 | 2014-12-08 | A kind of microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420765561.6U CN204271253U (en) | 2014-12-08 | 2014-12-08 | A kind of microstrip antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204271253U true CN204271253U (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420765561.6U Active CN204271253U (en) | 2014-12-08 | 2014-12-08 | A kind of microstrip antenna |
Country Status (1)
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| CN (1) | CN204271253U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993604B (en) * | 2015-05-26 | 2017-06-27 | 江苏大学 | A kind of cylinder type electromagnetic wave and vibrational energy mixed collection device |
| CN109904584A (en) * | 2019-01-29 | 2019-06-18 | 中国电子科技集团公司第三十八研究所 | A kind of dual polarized microstrip patch antenna unit and antenna array |
-
2014
- 2014-12-08 CN CN201420765561.6U patent/CN204271253U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993604B (en) * | 2015-05-26 | 2017-06-27 | 江苏大学 | A kind of cylinder type electromagnetic wave and vibrational energy mixed collection device |
| CN109904584A (en) * | 2019-01-29 | 2019-06-18 | 中国电子科技集团公司第三十八研究所 | A kind of dual polarized microstrip patch antenna unit and antenna array |
| CN109904584B (en) * | 2019-01-29 | 2021-08-03 | 中国电子科技集团公司第三十八研究所 | Dual-polarized microstrip patch antenna unit and antenna array |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |