CN203503789U - Subsize circular polarization ultrahigh frequency RFID reader fractal antenna - Google Patents
Subsize circular polarization ultrahigh frequency RFID reader fractal antenna Download PDFInfo
- Publication number
- CN203503789U CN203503789U CN201320666397.9U CN201320666397U CN203503789U CN 203503789 U CN203503789 U CN 203503789U CN 201320666397 U CN201320666397 U CN 201320666397U CN 203503789 U CN203503789 U CN 203503789U
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- Prior art keywords
- medium substrate
- square
- rfid reader
- reflecting plate
- ultrahigh frequency
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- Expired - Lifetime
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- 230000010287 polarization Effects 0.000 title claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 17
- 239000004411 aluminium Substances 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract 1
- 230000002411 adverse Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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Abstract
The utility model relates to a RFID reader fractal antenna, and specifically relates to a subsize circular polarization ultrahigh frequency RFID reader fractal antenna comprising a radiation paster, a medium substrate and a reflecting plate; the medium substrate is a square FR-4 epoxy resin CCL; the radiation paster comprises five square sheets having a square hole in middle of each square sheet; the square sheets are spliced in regulation and directly covering on the medium substrate; the reflecting plate is a square aluminium plate having long grooves opened in middle positions of the four edges, and fixed with the medium substrate through bolts; a coaxial supply line interface is arranged in corresponding positions on a diagonal in a same direction of the radiation paster, the medium substrate and the reflecting plate. The subsize circular polarization ultrahigh frequency RFID reader fractal antenna is small in size, long in identification distance, can completely cover china ultrahigh frequency range (920-925MHz), is simple in making and low in cost, and has very good market popularization prospect.
Description
Technical field
The utility model relates to RFID reader antenna, is specifically related to a kind of small size, circular polarization ultrahigh frequency RFID reader fractal antenna.
Background technology
RFID radio-frequency (RF) identification is a kind of contactless automatic identification technology, and it is automatically identified destination object and obtained related data by radiofrequency signal, and identification work need not manual intervention, can be operated in adverse circumstances.RFID technology can be identified high-speed moving object and can identify a plurality of labels simultaneously, swift and convenient to operate.
RFID is a kind of simple wireless system, only has two basic devices, and this system is for control, detection and tracking object.System is comprised of an interrogator (or reader) and a lot of transponder (or label).
At present, rfid system is widely used in the aspects such as logistics, production safety, road.Due to be identified the spatial direction of object possibly cannot fix or label to paste mode incorrect, this just requires reader antenna is circular polarized antenna.The circular polarization modulation system of using in existing RFID wireless telecommunication system, can reduce the requirement of system to bandwidth significantly, production, easy for installation, and cost is low, and this just requires reader transmitting antenna is small size.Therefore, provide a kind of meet completely under specific adverse circumstances, apply, small size, circular polarization ultrahigh frequency readers be that this area is needed the problem that will solve badly.
Utility model content
The utility model, for the existing problem of prior art, provides a kind of small size, circular polarization ultrahigh frequency RFID reader fractal antenna, and this antenna can be applied under specific adverse circumstances.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of small size, circular polarization ultrahigh frequency RFID reader fractal antenna, comprise radiation patch, medium substrate, reflecting plate, described medium substrate is the copper-clad plate of a foursquare FR-4 epoxy resin, described radiation patch comprises that five centres have the square sheets of square hole, the splicing of described square sheets rule directly overlays on described medium substrate, described reflecting plate is the square aluminium sheet that a center on four limits has elongated slot, described reflecting plate is fixed by bolt and described medium substrate, described radiation patch, medium substrate and the reflecting plate correspondence position on an equidirectional diagonal has coaxial feed line interface.
The utility model that adopts technique scheme, compared with prior art, its advantage and good effect are:
1. overall dimensions is little, can be placed in reader, needn't install separately;
2. microstrip antenna be take FR-4 medium as carrier, adopts coaxial feed mode, in the situation that meeting rfid system performance index, effectively reduces the cost of antenna;
3. antenna is made after small size, can be transmitted larger distance equally, through actual test, RFID communication distance reaches 7m.
4. cost performance is high, and coverage meets the demands.
As preferably, the utility model further technical scheme can be:
Described medium substrate is the FR-4 epoxy resin copper-clad plate of 60mm * 60mm, a thick 3mm.
Described radiation patch is copper sheets, and plating nickel on surface directly overlays on described medium substrate, and at surface coverage green oil.
Described reflecting plate is the square aluminium sheet of 60mm * 60mm, a thick 1mm, and the center on four limits of square aluminium sheet has the wide 2mm at sensing center, the elongated slot of long 24.5mm.
Adopt the utility model of above-mentioned preferred version, its technical parameter can reach: voltage standing wave ratio VSWR<2; Gain G reatT.GreaT.GT6Db; Working frequency range is 920MHz～925MHz, covers Chinese ultra-high frequency band completely, and centre frequency is 922MHz, the return loss <-25Db of centre frequency place; Have more the advantage that return loss is little, size is little, cost performance is high.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment medium substrate vertical view.
Fig. 2 is the utility model embodiment reflecting plate vertical view.
Fig. 3 is the utility model embodiment radiation patch vertical view.
Fig. 4 is that radiation patch overlays on the schematic diagram on medium substrate.
In figure: medium substrate 1, bolt hole 2, coaxial feed line interface 3, reflecting plate 4, elongated slot 5, radiation patch 6, square hole 7.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1, medium substrate 1 is the FR-4 epoxy resin copper-clad plate of 60mm * 60mm, a thick 3mm, can be fine conformal with rfid system, greatly reduce space.
Referring to Fig. 2, reflecting plate 4 is square aluminium sheets of 60mm * 60mm, a thick 1mm, the center on four limits of square aluminium sheet has the elongated slot 5 of the wide 2mm at sensing center, long 24.5mm, object is to guarantee, under the condition of frequency bandwidth and gain, to make frequency move to the scope of 920～925MHz.
Reflecting plate 4 with on medium substrate 1, have the bolt hole 2 that four corresponding diameters are 3mm, both link together by four bolts.
Referring to Fig. 3, Fig. 4, radiation patch 6 is comprised of five copper thin slices of square that have square hole 7, and copper sheets plating nickel on surface, in case oxidation.It is regularly arranged that five copper thin slices of square are pressed shown in Fig. 3, directly overlay on the medium substrate 1 shown in Fig. 1, and at surface coverage green oil.The gain that in radiation patch 6, institute's opening square hole 2 can improve antenna, the scope of expansion frequency band.
Press the fractal antenna that said structure forms, overall dimensions is 60mm * 60mm, voltage standing wave ratio VSWR<2, the gain G reatT.GreaT.GT6dBi of antenna, the working frequency range of antenna is 920～925MHz, cover Chinese ultra-high frequency band completely, the return loss <-25Db of centre frequency 922MHz place; Transmission range can reach 7 meters.
Described in the present embodiment, the test result of RFID reader fractal antenna is in Table 1.
Table 1 test result
Claims (4)
1. a small size, circular polarization ultrahigh frequency RFID reader fractal antenna, comprise radiation patch, medium substrate, reflecting plate, it is characterized in that, described medium substrate is the copper-clad plate of a foursquare FR-4 epoxy resin, described radiation patch comprises that five centres have the square sheets of square hole, the splicing of described square sheets rule directly overlays on described medium substrate, described reflecting plate is the square aluminium sheet that a center on four limits has elongated slot, described reflecting plate is fixed by bolt and described medium substrate, described radiation patch, medium substrate and the reflecting plate correspondence position on an equidirectional diagonal has coaxial feed line interface.
2. small size according to claim 1, circular polarization ultrahigh frequency RFID reader fractal antenna, is characterized in that, described medium substrate is the FR-4 epoxy resin copper-clad plate of 60mm * 60mm, a thick 3mm.
3. small size according to claim 1, circular polarization ultrahigh frequency RFID reader fractal antenna, is characterized in that, described radiation patch is copper sheets, and plating nickel on surface directly overlays on described medium substrate, and at surface coverage green oil.
4. small size according to claim 1, circular polarization ultrahigh frequency RFID reader fractal antenna, it is characterized in that, described reflecting plate is the square aluminium sheet of 60mm * 60mm, a thick 1mm, and the center on four limits of square aluminium sheet has the wide 2mm at sensing center, the elongated slot of long 24.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666397.9U CN203503789U (en) | 2013-10-28 | 2013-10-28 | Subsize circular polarization ultrahigh frequency RFID reader fractal antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666397.9U CN203503789U (en) | 2013-10-28 | 2013-10-28 | Subsize circular polarization ultrahigh frequency RFID reader fractal antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203503789U true CN203503789U (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666397.9U Expired - Lifetime CN203503789U (en) | 2013-10-28 | 2013-10-28 | Subsize circular polarization ultrahigh frequency RFID reader fractal antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203503789U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531907A (en) * | 2013-10-28 | 2014-01-22 | 唐山赛福特智能控制股份有限公司 | Small-sized circular polarized ultrahigh-frequency RFID (radio frequency identification) reader fractal antenna |
| CN105552538A (en) * | 2015-12-17 | 2016-05-04 | 电子科技大学 | Planar phased-array antenna capable of two-dimensional scanning at wide angle |
| CN106876866A (en) * | 2017-03-15 | 2017-06-20 | 杭州泽济电子科技有限公司 | Insulation plug with RFID label tag |
-
2013
- 2013-10-28 CN CN201320666397.9U patent/CN203503789U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531907A (en) * | 2013-10-28 | 2014-01-22 | 唐山赛福特智能控制股份有限公司 | Small-sized circular polarized ultrahigh-frequency RFID (radio frequency identification) reader fractal antenna |
| CN105552538A (en) * | 2015-12-17 | 2016-05-04 | 电子科技大学 | Planar phased-array antenna capable of two-dimensional scanning at wide angle |
| CN105552538B (en) * | 2015-12-17 | 2018-06-19 | 电子科技大学 | A kind of two dimension wide-angle plane of scanning motion phased array antenna |
| CN106876866A (en) * | 2017-03-15 | 2017-06-20 | 杭州泽济电子科技有限公司 | Insulation plug with RFID label tag |
| CN106876866B (en) * | 2017-03-15 | 2023-09-29 | 浙江悦和科技有限公司 | Insulating plug with RFID tag |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
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| CX01 | Expiry of patent term |