CN203039107U - A reader-writer microstrip antenna - Google Patents
A reader-writer microstrip antenna Download PDFInfo
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- CN203039107U CN203039107U CN 201320071552 CN201320071552U CN203039107U CN 203039107 U CN203039107 U CN 203039107U CN 201320071552 CN201320071552 CN 201320071552 CN 201320071552 U CN201320071552 U CN 201320071552U CN 203039107 U CN203039107 U CN 203039107U
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- electricity feeding
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Abstract
The utility model discloses a reader-writer microstrip antenna comprsing a top dielectric layer, a radiation paster, a foam layer, a bottom dielectric layer, a ground plane, and an electricity feeding layer. The radiation paster is connected with the top surface of the top dielectric layer, while the bottom of the top dielectric layer is connected with the bottom dielectric layer through the foam layer. The top of the bottom dielectric layer is connected with the ground plane. The bottom of the bottom dielectric layer is connected with the electricity feeding layer. A horizontal H-shaped crack and a vertical H-shaped crack are dug on the ground plane. The electricity feeding layer comprises a horizontal electricity feeding microstrip line and a vertical electricity feeding microstrip line. The horizontal electricity feeding microstrip line corresponds to the horizontal H-shaped crack on the ground plane. The vertical electricity feeding microstrip line corresponds to the vertical electricity feeding microstrip line on the ground plane. The reader-writer microstrip antenna using a crack coupling electricity feeding manner operates in UHF band and has characteristics of high isolation, a good gain characteristic, and cross polarization. The reader-writer microstrip antenna is a is a dual-polarization operating antenna with a simple structure and good performance.
Description
Technical field
The utility model relates to a kind of read write line microstrip antenna, and this read write line microstrip antenna is applicable to read-and-write device in the rfid system, belongs to microwave device and circuit manufacturing technology field.
Technical background
At present, the RFID technology has been widely used in applications such as production, logistics, transportation, false proof, tracking and asset management.Current, the frequency range that various countries use has nothing in common with each other, and in North America and South America, the passive RFID frequency range is that 902MHz is to 928MHz.Some scholars once proposed to use the microstrip antenna of slit coupling, and had obtained the high-isolation between dual polarization and two ports, but its operating frequency is 5.8GHz, inapplicable uhf band.The RFID antenna that also has the scholar to mention, though simple in structure, the central task frequency is at 911MHz, the impedance bandwidth relative narrower.The RFID antenna to the such broadband operation of 928MHz at 865MHz is also arranged, but only be suitable as label antenna for microstrip antenna, the feeding classification of slit coupling has better design flexibility.The microstrip antenna of dual polarization work also is very suitable for RFID and uses.Therefore, develop novel high isolation dual polarized slit coupling read write line microstrip antenna and just seem very necessary.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of read write line microstrip antenna, adopt high isolation dual polarized slit coupled structure, this read write line microstrip antenna has high polarization isolation, good gain characteristic and the advantage of cross polarization characteristics.
The technical scheme that its technical problem that solves the utility model adopts is: the read write line microstrip antenna, formed by top medium layer, radiation patch, froth bed, bottom dielectric layer, ground plane, feed layer.Upper surface at the top medium layer is connected with radiation patch, the top medium layer connect bottom dielectric layer below by froth bed, connection ground plane on bottom dielectric layer is connected with feed layer below bottom dielectric layer.Dug the slit of vertical H shape with, a horizontal H shape slit on the described ground plane.Described feed layer is to be made of with vertical feed microstrip line horizontal feed microstrip line, and horizontal feed microstrip line is corresponding with the horizontal H shape slit on the ground plane, and vertical feed microstrip line is corresponding with the vertical H shape slit on the ground plane.
The beneficial effects of the utility model are: this read write line microstrip antenna adopts the feeding classification of slit coupling, be operated in uhf band, have high isolate, good gain characteristic and cross polarization characteristics, be the microstrip antenna of the good dual polarization work of a kind of performance simple in structure.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Fig. 1 is the structural representation of read write line microstrip antenna.
Fig. 2 is the structural representation of looking up of Fig. 1.
Reference numeral:
1, top medium layer 2, radiation patch 3, froth bed 4, bottom dielectric layer
5, ground plane 6, feed layer 7, horizontal H shape slit 8, vertical H shape slit
9, horizontal feed microstrip line 10, vertical feed microstrip line.
Embodiment
See also Fig. 1, Fig. 2, the read write line microstrip antenna is made up of top medium layer, radiation patch, froth bed, bottom dielectric layer, ground plane, feed layer.Upper surface at top medium layer 1 is connected with radiation patch 2, top medium layer 1 connect bottom dielectric layer 4 below by froth bed 3, connection ground plane 5 on bottom dielectric layer 4 is connected with feed layer 6 below bottom dielectric layer 4.Dug the slit of vertical H shape with, a horizontal H shape slit 78 on the described ground plane 5.Described feed layer 6 is to be made of with vertical feed microstrip line 10 horizontal feed microstrip line 9, and horizontal feed microstrip line 9 is corresponding with the horizontal H shape slit 7 on the ground plane 5, and vertical feed microstrip line 10 is corresponding with the vertical H shape slit 8 on the ground plane 5.
The concrete structure size is: the thickness of top medium layer 1 and bottom dielectric layer 4 is 1.6mm, and relative dielectric constant is 4.4, and the thickness of froth bed 3 is 25mm, and radiation patch 2 is the single card sheet, and the length of radiation patch 2 is 113mm, and width is 108mm.The symmetry axis in two H shape slits digging in ground plane 5 becomes orthogonal relation, the width in two H shape slits is identical, H shape limit arm and intermediate arm width are respectively 1mm and 0.5mm, and the limit arm lengths in H shape slit is respectively 50mm and 40mm, and the spacing of limit arm is respectively 19mm and 29.1mm.Feed layer 6 is made of with vertical feed microstrip line 10 horizontal feed microstrip line 9, and the width of microstrip line is 3.1mm, and the characteristic impedance of microstrip line is 50 ohm, and the microstrip line end-to-end distance is respectively 8.05mm and 11.95mm from the distance in two H shape slits.
Claims (3)
1. read write line microstrip antenna, formed by top medium layer, radiation patch, froth bed, bottom dielectric layer, ground plane, feed layer, it is characterized in that: the upper surface at top medium layer (1) is connected with radiation patch (2), top medium layer (1) connect bottom dielectric layer (4) below by froth bed (3), connection ground plane (5) on bottom dielectric layer (4) is connected with feed layer (6) below bottom dielectric layer (4).
2. read write line microstrip antenna according to claim 1 is characterized in that: dug the slit of vertical H shape with, a horizontal H shape slit (7) (8) on the described ground plane (5).
3. read write line microstrip antenna according to claim 1, it is characterized in that: described feed layer (6) is to be made of with vertical feed microstrip line (10) horizontal feed microstrip line (9), horizontal feed microstrip line (9) is corresponding with the horizontal H shape slit (7) on the ground plane (5), and vertical feed microstrip line (10) is corresponding with the vertical H shape slit (8) on the ground plane (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071552 CN203039107U (en) | 2013-02-07 | 2013-02-07 | A reader-writer microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071552 CN203039107U (en) | 2013-02-07 | 2013-02-07 | A reader-writer microstrip antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039107U true CN203039107U (en) | 2013-07-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320071552 Expired - Fee Related CN203039107U (en) | 2013-02-07 | 2013-02-07 | A reader-writer microstrip antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934712A (en) * | 2015-07-01 | 2015-09-23 | 成都众易通科技有限公司 | Vehicle-mounted radio frequency signal transceiving device |
| CN104993236A (en) * | 2015-07-01 | 2015-10-21 | 成都众易通科技有限公司 | Floor device applied to vehicle radio frequency signal transmit-receive apparatus |
-
2013
- 2013-02-07 CN CN 201320071552 patent/CN203039107U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934712A (en) * | 2015-07-01 | 2015-09-23 | 成都众易通科技有限公司 | Vehicle-mounted radio frequency signal transceiving device |
| CN104993236A (en) * | 2015-07-01 | 2015-10-21 | 成都众易通科技有限公司 | Floor device applied to vehicle radio frequency signal transmit-receive apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20140207 |