CN104466375A - Novel antenna with coating layer - Google Patents
Novel antenna with coating layer Download PDFInfo
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- CN104466375A CN104466375A CN201410689969.4A CN201410689969A CN104466375A CN 104466375 A CN104466375 A CN 104466375A CN 201410689969 A CN201410689969 A CN 201410689969A CN 104466375 A CN104466375 A CN 104466375A
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- antenna
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- coating layer
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Abstract
The invention discloses a novel antenna with a coating layer. The novel antenna comprises a circularly polarized radiation patch, impedance conversion lines, micro-strip feeder lines, a dielectric substrate, a ground plate and the frequency selective surface coating layer. The circularly polarized radiation patch is etched to the center of the upper surface of the dielectric substrate and connected with the micro-strip feeder lines through the impedance conversion lines. The ground plate is etched to the lower surface of the dielectric substrate. The frequency selective surface coating layer is located over the circularly polarized radiation patch. The circularly polarized radiation patch is of a square shape with the side length ranging from 13 mm to 15.5 mm. The patch is connected with the two impedance conversion lines. The connecting points between the patch and the two impedance conversion lines are located on different sides of the square respectively. Sixty-four square metal units with the same area are etched to the lower surface of the frequency selective surface coating layer and are evenly arranged in an 8*8 array. By the adoption of the novel antenna, a feed structure and the frequency selective surface coating layer are both easy to produce; moreover, the antenna has good beam properties and frequency characteristics and is suitable for mass production.
Description
Technical field
The present invention relates to antenna technical field, particularly relate to a kind of novel coating antenna.
Background technology
Electronic charging system without parking (ETC, Electronic Toll Collection) be the AS utilizing the equipment of the new and high technologies such as wireless communication technology, automatic identification technology, image processing techniques, computer networking technology and software to form, can automatically collect road expense to realize vehicle without the need to stopping.
ETC system is made up of a few major parts such as roadside read-write equipment RSU, board units OBU, ground induction coil, automatic rail machine, wagon detector, toll collection, audit systems.ETC system is intercomed mutually and information exchange by roadside unit and board units, to reach the automatic identification to vehicle, and automatically from the specified account of this user, deducts pass cost, thus realize the system of automatic charging.The basic procedure of ETC system is: in preset range, arrange the device such as flap, railing restriction car speed; When vehicle sails expressway access place into, ETC system records the vehicle of this car, licence plate, entry time and place automatically by the transportation card in vehicle carried electronic label; Read these data to this system during exit and generate simultaneously and need payment amount, in transportation card, bales catch removes rapidly.
Along with the extensive use of ETC system at highway and the issue of National Electrical charge Dedicated Short Range Communications, standard GB/T20851-2007, the performance of the RSU antenna in ETC system also needs development, improves and improve.RSU antenna in existing ETC system mainly adopts the form of micro-strip array antenna, comes, to antenna element group battle array, antenna directivity to be strengthened by suitable feeding network.Current most of producer adopts the aerial array of Unit eight, also has part manufacturer to adopt 16 cellular arraies.But adopt microstrip array form not only to need to design complicated feeding network, and main lobe wave beam is wider, minor level is higher, easily causes monkey chatter problem.
Summary of the invention
The embodiment of the present invention provides a kind of novel coating antenna, feed structure and frequency-selective surfaces coating are all easy to produce, and antenna has good beam feature and frequency characteristic, frequency band is wider, secondary lobe is lower, gain significantly improves, and this antenna is suitable for producing in enormous quantities.
The embodiment of the present invention provides a kind of novel coating antenna, it is characterized in that, comprising: circular polarization radiation paster, impedance transformation line, microstrip feed line, medium substrate, ground plate and frequency-selective surfaces coating;
Described circular polarization radiation paster is etched in the center of described medium substrate upper surface, and is connected with described microstrip feed line by described impedance transformation line; Described ground plate is etched in the lower surface of described medium substrate, and described frequency-selective surfaces coating is positioned at directly over described circular polarization radiation paster;
Described circular polarization radiation paster is square, and the described square length of side is 13mm-15.5mm, and described paster is connected with two impedance transformation lines respectively, and described paster and the tie point of two impedance transformation lines lay respectively on described square different limit;
The lower surface of described frequency-selective surfaces coating etches the square metal unit of 64 area equation, and described square metal unit is that 8 × 8 arrays are evenly arranged.
Further, the length of side of described square metal unit is 13mm-15mm.
Further, the characteristic impedance of described impedance transformation line is 70 Ω ~ 90 Ω.
Further, the lower surface of described frequency-selective surfaces coating is supported on the top of described circular polarization radiation paster by insulating support.
Further again, described medium substrate and described frequency-selective surfaces coating all adopt polytetrafluoroethylmaterial material.
The novel coating antenna of the one that the embodiment of the present invention provides, have employed a circular polarization radiation paster, does not need to design complicated feeding network, simplifies design difficulty.Have employed frequency-selective surfaces coating and ground plate, constitute F-P resonant cavity, the electromagnetic wave that circular polarization radiation paster is given off is through in-phase stacking after resonant cavity, and gain is significantly improved, and also add frequency bandwidth; Resonant cavity to transmitted through electromagnetic wave secondary lobe obtain effective suppression, avoid energy leakage that aerial radiation goes out to adjacent lane, can effectively solve monkey chatter problem.The clad surface etching square metal unit that the square array adopted evenly is arranged, the area one dimension gradual change of square metal unit, is easy to produce, and is applicable to producing in enormous quantities.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the embodiment of novel coating antenna provided by the invention;
Fig. 2 is the structural representation of the circular polarization radiation paster of the embodiment of novel coating antenna provided by the invention;
Fig. 3 is the frequency-selective surfaces coat structure schematic diagram of the embodiment of novel coating antenna provided by the invention;
Fig. 4 is the input reflection coefficient analogous diagram of the embodiment of novel coating antenna provided by the invention;
Fig. 5 is the gain radiation directional diagram of the embodiment of novel coating antenna provided by the invention;
Fig. 6 is the axial ratio analogous diagram of the embodiment of novel coating antenna provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1-3, the structure of the embodiment of novel coating antenna provided by the invention is described in detail.
See Fig. 1, the overall structure schematic diagram of the embodiment of novel coating antenna provided by the invention, comprises circular polarization radiation paster 1, impedance transformation line 2, impedance transformation line 9, microstrip feed line 3, microstrip feed line 10, medium substrate 4, ground plate 5, the square metal unit 7 of frequency-selective surfaces coating 6, evenly two-dimension periodic arrangement and insulating support 8;
Described circular polarization radiation paster 1 is etched in the center of described medium substrate 4 upper surface, and is connected with described microstrip feed line 3 by described impedance transformation line 2, is connected with described microstrip feed line 10 by described impedance transformation line 9; Described ground plate 5 is etched in the lower surface of described medium substrate 4, described frequency-selective surfaces coating 6 is positioned at directly over described circular polarization radiation paster 1, make to form F-P resonant cavity between described frequency-selective surfaces coating 6 and described ground plate 5,6 lower surfaces of described frequency-selective surfaces coating are supported on the top of described circular polarization radiation paster 1 by insulating support 8.
Described impedance transformation line 2, its length is 9mm, and width is 1.2mm.Impedance transformation line one end connects with circular polarization radiation paster 1, and the real part Z0 of its input impedance is transformed to 50 ohm, and the other end connects with microstrip feed line 3, realizes impedance matching.
Described impedance transformation line 9, its length is 9mm, and width is 1.2mm.Impedance transformation line one end connects with circular polarization radiation paster 1, and the real part Z0 of its input impedance is transformed to 50 ohm, and the other end connects with microstrip feed line 10, realizes impedance matching.
Described frequency-selective surfaces coating 6, is supported on directly over medium substrate 4 by four plastic stents 8, forms F-P resonant cavity with the ground plate 5 of medium substrate 4 lower surface.
Preferably, the characteristic impedance of described impedance transformation line 2 and impedance transformation line 9 is 70 Ω ~ 90 Ω.
In the middle of concrete enforcement, described medium substrate 4 all adopts polytetrafluoroethylmaterial material with described frequency-selective surfaces coating 6.Described medium substrate 4 also adopts other materials to make with described frequency-selective surfaces coating 6.
See Fig. 2, it is the structural representation of the circular polarization radiation paster of the embodiment of novel coating antenna provided by the invention.
Circular polarization can be produced for making radiation patch, the circular polarization radiation paster 1 of the novel coating antenna that the embodiment of the present invention provides is connected with two impedance transformation lines, there are two distributing points, two degenerate modes that described circular polarization radiation paster 1 is produced produce and are separated, two degenerate modes can be made to produce 90 ° of phase differences, realize circular polarization.With reference to Fig. 2, the length of side a=14.1mm of the described circular polarization radiation paster 1 in the embodiment of the present invention, radiation patch is copper material.
Optionally, the length of side of described circular polarization radiation paster is 13mm-15.5mm;
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, the length of side of described circular polarization radiation paster can be set as other numerical value, these improvement are also considered as protection scope of the present invention.
See Fig. 3, the frequency-selective surfaces coat structure schematic diagram of the embodiment of novel coating antenna provided by the invention.
The lower surface of described frequency-selective surfaces coating 6 etches the square metal unit 7 of 64 area equation, and described square metal unit 7 is that 8 × 8 arrays are evenly arranged.Its parameter comprises length of side d and cycle t, adjusts reflection coefficient amplitude p and reflected phase will that these two parameters can change frequency-selective surfaces coating 6.When reflection coefficient amplitude p is between 0.89 ~ 0.93, the gain of antenna can be greatly enhanced, and when p continues to increase, the gain of antenna can sharply decline.
Optionally, the length of side of described square metal unit is 13mm-15mm.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, the length of side of unit maximum for area in described square metal unit can be set as other numerical value, these improvement are also considered as protection scope of the present invention.
See Fig. 4-6, the simulated effect of the embodiment of novel coating antenna provided by the invention is described in detail.
See Fig. 4, it is the input reflection coefficient analogous diagram of the embodiment of novel coating antenna provided by the invention.
In Fig. 4, abscissa is the frequency of antenna, and ordinate represents antenna reflection coefficient at different frequencies, and reflection coefficient reflects the ability of energy on this day line absorption feeder line.As seen from Figure 4, antenna is less than-10dB at 5.75-5.9GHz passband reflection coefficient, and coupling is good.
See Fig. 5, it is the gain radiation directional diagram of the embodiment of novel coating antenna provided by the invention.
In Fig. 5, abscissa represents the angle of radiation of antenna, and ordinate represents the gain of antenna under different angle of radiation.As shown in Figure 5, this Antenna Operation is at 5.8GHz, and the maximum gain of antenna reaches 18dB, and minor level is-16dB, meets the requirement of ETC system to gain.
See Fig. 6, it is the axial ratio analogous diagram of the embodiment of novel coating antenna provided by the invention.
In Fig. 6, abscissa represents the angle of radiation of antenna, and ordinate represents the axial ratio of the antenna that different angle of radiation is corresponding.As seen from Figure 6, this Antenna Operation is at 5.8GHz, and the angle that its horizontal plane axial ratio is less than 3dB is about 50 °, and the angle that vertical plane axial ratio is less than 3dB is about 60 °, meets the requirement of ETC system to polarization.
The novel coating antenna of the one that the embodiment of the present invention provides, have employed a circular polarization radiation paster, does not need to design complicated feeding network, simplifies design difficulty.Have employed frequency-selective surfaces coating and ground plate, constitute F-P resonant cavity, the electromagnetic wave that circular polarization radiation paster is given off is through in-phase stacking after resonant cavity, and gain is significantly improved, and also add frequency bandwidth; Resonant cavity to transmitted through electromagnetic wave secondary lobe obtain effective suppression, avoid energy leakage that aerial radiation goes out to adjacent lane, can effectively solve monkey chatter problem.The clad surface etching square metal unit that the square array adopted evenly is arranged, the area one dimension gradual change of square metal unit, is easy to produce, and is applicable to producing in enormous quantities.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (5)
1. a novel coating antenna, is characterized in that, comprising: circular polarization radiation paster, impedance transformation line, microstrip feed line, medium substrate, ground plate and frequency-selective surfaces coating;
Described circular polarization radiation paster is etched in the center of described medium substrate upper surface, and is connected with described microstrip feed line by described impedance transformation line; Described ground plate is etched in the lower surface of described medium substrate, and described frequency-selective surfaces coating is positioned at directly over described circular polarization radiation paster;
Described circular polarization radiation paster is square, and the described square length of side is 13mm-15.5mm, and described paster is connected with two impedance transformation lines respectively, and described paster and the tie point of two impedance transformation lines lay respectively on described square different limit;
The lower surface of described frequency-selective surfaces coating etches the square metal unit of 64 area equation, and described square metal unit is that 8 × 8 arrays are evenly arranged.
2. novel coating antenna as claimed in claim 1, is characterized in that: the length of side of described square metal unit is 13mm-15mm.
3. novel coating antenna as claimed in claim 1, is characterized in that: the characteristic impedance of described impedance transformation line is 70 Ω ~ 90 Ω.
4. novel coating antenna as claimed in claim 1, is characterized in that: the lower surface of described frequency-selective surfaces coating is supported on the top of described circular polarization radiation paster by insulating support.
5. novel coating antenna as claimed in claim 1, is characterized in that: described medium substrate and described frequency-selective surfaces coating all adopt polytetrafluoroethylmaterial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689969.4A CN104466375A (en) | 2014-11-25 | 2014-11-25 | Novel antenna with coating layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689969.4A CN104466375A (en) | 2014-11-25 | 2014-11-25 | Novel antenna with coating layer |
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| CN104466375A true CN104466375A (en) | 2015-03-25 |
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| CN201410689969.4A Pending CN104466375A (en) | 2014-11-25 | 2014-11-25 | Novel antenna with coating layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453051A (en) * | 2017-07-06 | 2017-12-08 | 南京航空航天大学 | Antenna and its performance implementation method based on imperfect frequency-selective surfaces |
| CN109546294A (en) * | 2018-11-20 | 2019-03-29 | 上海交通大学 | S-band Bipolarization antenna for base station and base station towards mobile 5G communication |
| CN109638477A (en) * | 2019-01-17 | 2019-04-16 | 山东大学 | A kind of broadband low minor lobe circular polarised array antenna on the super surface of load |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012919A1 (en) * | 2001-07-26 | 2003-02-13 | E-Tenna Corporation | Reduced weight artificial dielectric antennas |
| CN102544722A (en) * | 2012-01-04 | 2012-07-04 | 电子科技大学 | Polarization reconfigurable high-gain panel antenna |
| CN103354304A (en) * | 2013-06-13 | 2013-10-16 | 西安电子科技大学 | Coated antenna for microwave reader-writer of ETC (electronic toll collection) system |
-
2014
- 2014-11-25 CN CN201410689969.4A patent/CN104466375A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012919A1 (en) * | 2001-07-26 | 2003-02-13 | E-Tenna Corporation | Reduced weight artificial dielectric antennas |
| CN102544722A (en) * | 2012-01-04 | 2012-07-04 | 电子科技大学 | Polarization reconfigurable high-gain panel antenna |
| CN103354304A (en) * | 2013-06-13 | 2013-10-16 | 西安电子科技大学 | Coated antenna for microwave reader-writer of ETC (electronic toll collection) system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453051A (en) * | 2017-07-06 | 2017-12-08 | 南京航空航天大学 | Antenna and its performance implementation method based on imperfect frequency-selective surfaces |
| CN109546294A (en) * | 2018-11-20 | 2019-03-29 | 上海交通大学 | S-band Bipolarization antenna for base station and base station towards mobile 5G communication |
| CN109546294B (en) * | 2018-11-20 | 2020-07-14 | 上海交通大学 | S-band dual-polarized base station antenna and base station for mobile 5G communication |
| CN109638477A (en) * | 2019-01-17 | 2019-04-16 | 山东大学 | A kind of broadband low minor lobe circular polarised array antenna on the super surface of load |
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Application publication date: 20150325 |
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