CN105305040A - Antenna used for anti-metal tag and antenna signal transmitting and receiving method - Google Patents
Antenna used for anti-metal tag and antenna signal transmitting and receiving method Download PDFInfo
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Abstract
The invention relates to a full planar structure antenna used for an ultrahigh-frequency radio frequency identification anti-metal tag and an antenna signal receiving and transmitting method. The full planar structure antenna comprises a dielectric base acting as a substrate, a radiation patch, an open circuit feeder line, a patch feeder line and a passive radio frequency chip. The radiation patch, a metal ground, the open circuit feeder line, the patch feeder line and the passive radio frequency chip are arranged on the dielectric base. The radiation patch senses a signal transmitted by a reader-writer and transmits the signal to the open circuit feeder line and the patch feeder line or receives the signal of the open circuit feeder line and the patch feeder line and performs radiation. The open circuit feeder line receives the signal transmitted by the radiation patch and transmits the signal coupled with the metal ground to the passive radio frequency chip or receives the signal of the passive radio frequency chip and transmits the signal coupled with the metal ground to the radiation patch. The patch feeder line transmits and receives the signal between the radiation patch and the passive radio frequency chip. The passive radio frequency chip receives the signal of the open circuit feeder line and the patch feeder line and processes the signal or processes the signal according to the signal of the reader-writer and transmits the signal to the open circuit feeder line and the patch feeder line. Influence on performance of the tag caused by the metal surface boundary effect can be avoided by the full planar structure antenna used for the ultrahigh-frequency radio frequency identification anti-metal tag.
Description
Technical field
The present invention relates to technical field of RFID, be specifically related to the signal transmitting of a kind of whole plane structural antenna for UHF radio frequency identification anti-metal tag and antenna, method of reseptance.
Background technology
Super high frequency radio frequency identification UHFRFID technology comprises unique identifying information to be stored in chip, and use radio-frequency (RF) identification, tracking or management to be attached to the technology of the object of this chip.The feature that super high frequency radio frequency identification UHFRFID technology has that accuracy is high, memory space is large, anti-adverse environment, fail safe are high, be widely used in production, logistics, traffic, the field such as false proof, along with correlation technique constantly improve and ripe, super high frequency radio frequency identification UHFRFID technology demonstrates huge development potentiality and application space, will become a basic technology of Future Information social construction.
In quite a few super high frequency radio frequency identification UHFRFID applies, need by label attachment in metal object surface, such as automobile, container, steel cylinder etc.Now, due to the impact of metal boundary effect, can there is larger change in radiation mode, the performance parameter such as input impedance and resonance frequency of original label antenna, make original label antenna be difficult to normally work in metal surface, the reading/writing distance of label can significantly reduce, and even can not read.
For head it off, prior art adopts following three kinds.
The first is: adopt absorbing material to be attached at metal surface, to reduce the boundary effect of metal surface, or uses such as pottery to manufacture label antenna at interior special material.The shortcoming of this kind of technology is to improve manufacture technics cost, is unfavorable for applying of label, and this technology just reduces the impact of metal surface simultaneously, is not thorough head it off.
The second is: by padded for label certain height, to reduce the impact of boundary effect.Theory and practice proves, by label, in metal surface, padded 0.05-0.1 λ, λ are the effective wavelength of operating frequency of antenna, i.e. 16-32mm, and tag performance can be made to return to acceptable degree.The shortcoming of this kind of technology is to increase label volume, is unfavorable for application, is difficult to realize above-mentioned padded height under partial picture, and this technology also just reduces the impact of metal surface simultaneously, is not thorough head it off.
The third is: use through particular design and can in metal surface normal work tap antenna, namely use anti-metal tag antenna.This technology fundamentally thoroughly solves this problem, reduces cost and label volume simultaneously, is beneficial to application.Therefore the label antenna of anti-metal is the critical component of ultrahigh-frequency radio-frequency identification system in this type of application.
In traditional anti-metal tag antenna, the ground level of metal surface as antenna is also connected by via hole or short circuit wall by micro-strip paster antenna or planar inverted-F antenna, thus the cost of anti-metal tag antenna is increased, and is unfavorable for large-scale production.For super high frequency radio frequency identification label, cost is the most critical factor affecting its application." metal embedded-type ultrahigh frequency radio frequency identification antenna " such as disclosed in application for a patent for invention CN102544725A, it makes use of two short circuit walls, the feed line of upper surface of base plate and the metal of base lower surface are connected, short circuit wall adds processing step, thus increase cost, be unfavorable for the popularization of label.
In addition, although plane dipole label antenna does not need via hole or short circuit wall, comparatively complicated and its input impedance of these antenna structure can not change on a large scale flexibly, be difficult to neatly with label chip conjugate impedance match.
To sum up, described prior art all can not be advantageously applied on anti-metal tag.
Summary of the invention
Technical problem to be solved by this invention is to provide signal transmitting, the method for reseptance of a kind of whole plane structural antenna for UHF radio frequency identification anti-metal tag and antenna, metal surface boundary effect can be avoided the impact of tag performance, meet the requirement of label anti-metal and low cost.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: for the whole plane structural antenna of UHF radio frequency identification anti-metal tag, it is characterized in that, comprise medium substrate, described medium substrate is as substrate, and the one side of described medium substrate is provided with radiation patch, open feeder, patch line and passive RF chip; Described radiation patch is connected with described passive RF chip by patch line, and described passive RF chip is connected with described open feeder; Described radiation patch is also provided with U-lag on the surface, for making impedance more mild with frequency change; The another side covering metal ground of described medium substrate, described metal ground is used for being coupled with the signal that open feeder receives;
When a signal is received:
Described radiation patch, for responding to signal and the energy of read write line transmitting, and is sent to described open feeder and described patch line;
Described open feeder, for receiver radiation paster send signal and energy and with metal be coupled after be sent to passive RF chip;
Described patch line, the signal sent for receiver radiation paster and energy pass to described passive RF chip;
Described passive RF chip, for receiving signal and the energy of open feeder and the transmission of patch line, and utilizes the energy received to process to the received signal;
When described label is used for transmitting:
Described passive RF chip, for carrying out processing according to the signal of the read write line received and send processing signals to open feeder and patch line;
Described open feeder, for receive passive RF chip send signal and with metal be coupled after be passed to radiation patch;
Described patch line, for receiving the signal of passive RF chip transmission and being passed to radiation patch;
Described radiation patch, for receiving the signal of open feeder and the transmission of patch line and being radiated to space.
Compared with existing super high frequency radio frequency identification antenna, tool of the present invention has the following advantages:
(1) shape of inventive antenna and structure make it have the characteristic of anti-metal, and at metal sheet surface, use the maximum decipherment distance of the label of this antenna for 5-11 rice, peak gain is-3 to-1.5dBi;
(2) shape of inventive antenna and structure make its impedance by adjusting some parameter of antenna and adjusting flexibly, be easy to mate from different passive radio frequency identification chips;
(3) inventive antenna just has omni-directional on the metal surface;
(4) inventive antenna is without via hole and multi-layer sheet, and thus manufacturing process is simple, reduces production cost, is beneficial to the propagation and employment of label.
On the basis of technique scheme, the present invention can also do following improvement:
Further, described medium substrate is the cuboid thin plate adopting FR4 material to make, the effective wavelength of thickness to be 0.01 λ, λ be operating frequency of antenna; Described metal ground adopts copper product to make, and covers described medium substrate lower surface.
Adopt the beneficial effect of above-mentioned further scheme to be: the FR4 plate of high-k can make the size of antenna reduce, the FR4 plate simultaneously covering copper easily manufactures and cheap.
Further, described open feeder is the T-shaped shape be made up of vertical section and traversing section, described vertical section one end connected with passive radio frequency chip, the other end is connected with described traversing section, and described vertical section is positioned on a wherein center line of described medium substrate, described center line is parallel with the long limit of described medium substrate; The width of described vertical section is 3mm.
The beneficial effect of above-mentioned further scheme is adopted to be: the open stub of T-shaped shape makes the impedance of this antenna more mild with the change of frequency, and bandwidth is increased.
Further, described patch line is the rectangle adopting copper sheet to make, the region leaving preset area between described patch line and described vertical section is placed for described passive RF chip, and described patch line and passive RF chip all with described vertical section conllinear.
Further, the length of described patch line is 3mm, and width is 2mm;
The Breadth Maximum of described passive radio frequency identification chip is 3mm.
Further, described radiation patch is " U " type structure adopting copper product to make, and the line of symmetry of described radiation patch is positioned on the straight line at described vertical section place.
The beneficial effect of above-mentioned further scheme is adopted to be: the impedance that can adjust antenna reaches impedance matching to make antenna and chip, is applicable to all kinds of passive high-frequency radio frequency identification chip.
Further, a pair arm lengths of described radiation patch is 9.5mm, and width is 1mm, and the end length of described radiation patch is 49mm, and width is 44mm; And the end of described radiation patch is 5mm with the corresponding frame distance of described medium substrate.
Further, the opening direction of described U-lag is contrary with the opening direction of described radiation patch, and described U-lag is symmetrical about the straight line at described vertical section place, and the distance between described U-lag and described patch line is 4mm.
The beneficial effect of above-mentioned further scheme is adopted to be: U-lag can make the impedance of this antenna more mild with frequency change, thus effectively increases bandwidth.
Further, a pair arm lengths of described U-lag is 23.25mm, and width is 5mm, and the end length of described U-lag is 30mm, and width is 5.25mm.
The another kind of technical scheme that the present invention solves the problems of the technologies described above is as follows:
For the signal transmitting method of UHF radio frequency identification anti-metal tag, comprise the following steps:
Described passive RF chip carries out processing according to the signal of the read write line received and sends processing signals to open feeder and patch line;
Described open feeder receive signal that passive RF chip sends and with metal be coupled after be passed to radiation patch;
Described patch line receives the signal of passive RF chip transmission and is passed to radiation patch;
Described radiation patch receives the signal of open feeder and the transmission of patch line and is radiated to space.
The another kind of technical scheme that the present invention solves the problems of the technologies described above is as follows:
For the signal acceptance method of UHF radio frequency identification anti-metal tag, comprise the following steps:
The signal that described radiation patch induction read write line is launched and energy, and be sent to described open feeder and described patch line;
The signal that described open feeder receiver radiation paster sends and energy and with metal be coupled after be sent to passive RF chip;
The signal that described patch line receiver radiation paster sends and energy also pass to described passive RF chip;
Described passive RF chip receives signal and the energy of open feeder and the transmission of patch line, and utilizes the energy received to process to the received signal.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of whole plane structural antenna for UHF radio frequency identification anti-metal tag of the present invention;
Fig. 2 is the vertical view of a kind of whole plane structural antenna for UHF radio frequency identification anti-metal tag of the present invention;
Fig. 3 is a kind of method flow schematic diagram transmitted for the whole plane structural antenna of UHF radio frequency identification anti-metal tag of the present invention;
Fig. 4 is the method flow schematic diagram of a kind of whole plane structural antenna Received signal strength for UHF radio frequency identification anti-metal tag of the present invention;
Fig. 5 (a) is the result curve figure of the impedance matching of anti-metal antenna of the present invention and RI_UHF_00001_01 type label chip;
Fig. 5 (b) is the result curve figure of the impedance matching of anti-metal antenna of the present invention and Higgs-3 type label chip;
Fig. 6 (a) is the result curve figure that anti-metal antenna of the present invention is mated with the return loss of RI_UHF_00001_01 type label chip;
Fig. 6 (b) is the result curve figure that anti-metal antenna of the present invention is mated with the return loss of Higgs-3 type label chip;
Fig. 7 (a) is the result curve figure that anti-metal antenna of the present invention is mated with the peak gain of RI_UHF_00001_01 type label chip;
Fig. 7 (b) is the result curve figure that anti-metal antenna of the present invention is mated with the peak gain of Higgs-3 type label chip;
Fig. 8 (a) is the result curve figure that anti-metal antenna of the present invention is mated with the maximum decipherment distance of RI_UHF_00001_01 type label chip;
Fig. 8 (b) is the result curve figure that anti-metal antenna of the present invention is mated with the maximum decipherment distance of Higgs-3 type label chip;
Fig. 9 (a) is the result figure of the E surface radiation pattern of anti-metal antenna of the present invention and RI_UHF_00001_01 type label chip;
Fig. 9 (b) is the result figure of the E surface radiation pattern of anti-metal antenna of the present invention and Higgs-3 type label chip.
In accompanying drawing, the list of parts representated by each label is as follows:
1, medium substrate, 2, radiation patch, 3, metal ground, 4, U-lag, 5, open feeder, 51, vertical section, 52, traversing section, 6, patch line, 7, passive RF chip.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In the present embodiment, the copper sheet used is selected but is not limited to the copper sheet that thickness is 0.07mm, and the medium substrate 2 used is selected but is not limited to thickness for 3.4mm's.
See figures.1.and.2, whole plane structural antenna for UHF radio frequency identification anti-metal tag of the present invention comprises medium substrate 1, described medium substrate 1 is as substrate, and the one side of described medium substrate 1 is provided with radiation patch 2, open feeder 5, patch line 6 and passive RF chip 7; Described radiation patch 2 is connected with described passive RF chip 7 by patch line 6, and described passive RF chip 7 is connected with described open feeder 5; Described radiation patch 2 is also provided with U-lag 4 on the surface, for making impedance more mild with frequency change; The another side covering metal ground 3 of described medium substrate 1, described metal ground 3 is for being coupled with the signal that open feeder 5 receives;
When label is used for Received signal strength:
Radiation patch 1, for responding to signal and the energy of read write line transmitting, and is sent to open feeder 5 and patch line 6;
Open feeder 5, for receiver radiation paster 1 send signal and energy and with metal ground 3 be coupled after be sent to passive RF chip 7;
Patch line 6, the signal sent for receiver radiation paster 1 and energy pass to passive RF chip 7;
Passive RF chip 7, for receiving signal and the energy of open feeder 5 and patch line 6 transmission, and utilizes the energy received to process to the received signal;
When label is used for transmitting:
Passive RF chip 7, for carrying out processing according to the signal of the read write line received and send processing signals to open feeder 5 and patch line 6;
Open feeder 5, for receiving the signal of passive RF chip 7 transmission and being passed to radiation patch 1 after being coupled with metal ground 3;
Patch line 6, for receiving the signal of passive RF chip 7 transmission and being passed to radiation patch 1;
Radiation patch 1, for receiving the signal of open feeder 5 and patch line 6 transmission and being radiated to space.
Medium substrate 1 is as the media stage of antenna, and for adopting the cuboid thin plate of FR4 material, relative dielectric constant is 4.4, and loss angle tangent is 0.02, and its length is 58mm, and thickness is 3.4mm.Metal ground 3, as Horizon panel, adopts copper product make and cover whole medium substrate 1 lower surface.
Open feeder 5 is as open-circuit line feed, which ensure that antenna whole plane structure, be attached at medium substrate 1 upper surface bottom, for the T-shaped shape be made up of vertical section 51 and traversing section 52, described vertical section 51 one end connected with passive radio frequency chip 7, the other end is connected with described traversing section 52, and described vertical section 51 is positioned on a wherein center line of described medium substrate 1, and described center line is parallel with the long limit of described medium substrate 1; The width of described vertical section 51 is 3mm.
Patch line 6, as radiation patch end feed line, is attached at medium substrate 1 upper surface, is rectangle copper sheet, its length L
6for 3mm, width W
6for 2mm, described patch line 6 and passive RF chip 7 all with described vertical section 51 conllinear.
Passive RF chip 7 is radio-frequency (RF) identification passive chip, and described passive RF chip 7 is both-end passive device, be located in the regional location of 3mm × 1mm between patch line 6 and vertical section 51, Breadth Maximum is 3mm, one end aluminum steel or gold thread are connected with patch line, and one end aluminum steel or gold thread are connected with vertical line 51.Because passive RF chip 7 and inventive antenna need the requirement of impedance conjugate impedance match, need according to the impedance adjustment W of different money chip
51, L
52, and W
52these three parameters, W
51with W
52the effective wavelength of the excursion of sum to be 0-0.5 λ, λ be operating frequency of antenna, medium substrate is wide with W
51, W
52the increase of this two parameter and increasing.
Radiation patch 2, as main electromagnetic radiation part, be " U " type structure adopting copper product to make, and the line of symmetry of described radiation patch 2 is positioned on the straight line at described vertical section 51 place.Wherein, a pair arm lengths of described radiation patch 2 is 9.5mm, and width is 1mm, and the end length of described radiation patch 2 is 49mm, and width is 44mm; And the end of described radiation patch 2 is 5mm with the corresponding frame distance of described medium substrate 1.
U-lag 4 is as slot-coupled unit, be engraved on primary radiation sheet 11, opening direction is contrary with the opening direction of described radiation patch 2, and described U-lag 4 is symmetrical about the straight line at described vertical section 51 place, and the distance between described U-lag 4 and described patch line 6 is 4mm.
A pair arm lengths of U-lag 4 is 23.25mm, and width is 5mm, and the end length of described U-lag 4 is 30mm, and width is 5.25mm.
Inventive antenna adopts plane microstrip antenna principle.Wherein, radiation patch 2 act as at metal surface radiation or inductive electromagnetic signal; The U-lag 4 be engraved in radiation patch 2 act as and utilizes U-shaped gap make impedance variation mild and increase bandwidth; Metal ground 3 act as coupled electromagnetic energy; Open feeder 5 and feed line 6 its be the effect of terminal passive RF chip 7 feed, feed line 6 adopts direct feed, and open feeder 5 adopts and metal ground 3 forms coupling circuit rear feed, regulate the length of open feeder that the overall impedance of inventive antenna also can be regulated to reach the effect of inventive antenna and passive RF chip 7 conjugate impedance match simultaneously.
Present invention also offers a kind of signal transmitting method of the antenna for UHF radio frequency identification anti-metal tag, as shown in Figure 3, comprise the following steps:
Passive RF chip, for carrying out processing according to the signal of the read write line received and send processing signals to open feeder and patch line;
Open feeder, for receive passive RF chip send signal and with metal be coupled after be passed to radiation patch;
Patch line, for receiving the signal of passive RF chip transmission and being passed to radiation patch;
Radiation patch, for receiving the signal of open feeder and the transmission of patch line and being radiated to space.
The present invention also provides a kind of signal acceptance method of the antenna for UHF radio frequency identification anti-metal tag, as shown in Figure 4, comprises the following steps:
Radiation patch, for responding to signal and the energy of read write line transmitting, and is sent to open feeder and patch line;
Open feeder, for receiver radiation paster send signal and energy and with metal be coupled after be sent to passive RF chip;
Patch line, the signal sent for receiver radiation paster and energy pass to passive RF chip;
Passive RF chip, for receiving signal and the energy of open feeder and the transmission of patch line, and utilizes the energy received to process to the received signal.
Below by emulation experiment, effect of the present invention is described:
Software emulation is tested with actual, selects but is not limited to the RI_UHF_00001_01 type super high frequency radio frequency identification label chip of TI (TexasInstruments) company and the Higgs-3 type superelevation sheet radio frequency identification label chip of Alien company.Above-mentioned two super high frequency radio frequency identification label chip is connected with anti-metal antenna of the present invention and impedance matching respectively.When mating with RI_UHF_00001_01 type super high frequency radio frequency identification label chip, inventive antenna W
51for 33mm, W
52for 1mm, L
52for 8mm, W
2for 87mm; When mating with Higgs-3 type super high frequency radio frequency identification label chip, inventive antenna W
51for 37mm, W
52for 9mm, L
52for 28mm, W
2for 97mm.
HFSS simulation software and survey tool is used to emulate and actual measurement anti-metal tag antenna of the present invention.For verifying the anti-metal of label, emulation is with all central in 200mm × 200mm metallic plate by label attachment when measuring.Result is as shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, and wherein Fig. 5 is impedance matching curves, and Fig. 6 is return loss s
11curve, Fig. 7 is peak gain curve, and Fig. 8 is maximum decipherment distance curve, and Fig. 9 is E surface radiation ideograph.
Fig. 5 (a) is the impedance matching result of mating with RI_UHF_00001_01 type label chip, and (b) is the impedance matching result of mating with Higgs-3 type label chip.Found by Fig. 5, the impedance real part of RI_UHF_00001_01 type label chip and its respective antenna and imaginary part are successively mated completely when 935MHz and 920MHz; The impedance real part of Higgs-3 type label chip and its respective antenna and imaginary part are successively mated completely when 922MHz and 921MHz.
Fig. 6 (a) is the return loss result of mating with RI_UHF_00001_01 type label chip, and (b) is the return loss result of mating with Higgs-3 type label chip.Found by Fig. 6 (a), the half-power bandwidth (-3dB) of this label is 904-938MHz, covers the frequency band standards of north America region 902-928MHz, and return loss s
11be less than the region of-10dB, namely the working frequency range of excellent performance is 914-926MHz ,-10dB bandwidth is 12MHz, has covered the frequency range standard of Chinese 920-925MHz, return loss s
11minimum is-16; Found by Fig. 6 (b), the half-power bandwidth (-3dB) of this label is 902-938MHz, covers the frequency band standards of north America region 902-928MHz, and return loss s
11be less than the region of-10dB, namely the working frequency range of excellent performance is 917-927MHz ,-10dB bandwidth is 10MHz, has covered the frequency range standard of Chinese 920-925MHz, return loss s
11minimum is-29.Therefore anti-metal antenna impedance matching of the present invention is good, covers super high frequency radio frequency identification frequency range, especially meets the frequency band standards of Chinese defined.
Fig. 7 (a) is the peak gain result of mating with RI_UHF_00001_01 type label chip, and maximum is-3.1dBi at 925MHz, average out to-3.2dBi; Fig. 7 (b) is the peak gain result of mating with Higgs-3 type label chip, and maximum is-2dBi at 913MHz, average out to-2.08dBi.Therefore anti-metal antenna of the present invention can accept in the gain of metal sheet surface, has anti-metal.
Fig. 8 (a) is the maximum decipherment distance result of mating with RI_UHF_00001_01 type label chip, and maximum is 5.1 meters at 920MHz, and being more than 5 meters in 920-925MHz China frequency band, is more than 3.6 meters in 902-928MHz North American; B () is the maximum decipherment distance result of mating with Higgs-3 type label chip, maximum is 10.3 meters at 922MHz, and being more than 10 meters in 920-925MHz China frequency band, is more than 6 meters in 902-928MHz North American.Therefore anti-metal antenna of the present invention is far away at the decipherment distance of metal surface.
Fig. 9 (a) is the E surface radiation model results of mating with RI_UHF_00001_01 type label chip, and (b) is the E surface radiation model results of mating with Higgs-3 type label chip.Found by Fig. 9, anti-metal antenna of the present invention just has omni-directional on the metal surface.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for the whole plane structural antenna of UHF radio frequency identification anti-metal tag, it is characterized in that, comprise medium substrate (1), described medium substrate (1) is as substrate, and the one side of described medium substrate (1) is provided with radiation patch (2), open feeder (5), patch line (6) and passive RF chip (7); Described radiation patch (2) is connected with described passive RF chip (7) by patch line (6), and described passive RF chip (7) is connected with described open feeder (5); Described radiation patch (2) is also provided with U-lag (4) on the surface, for making impedance more mild with frequency change; Another side covering metal ground (3) of described medium substrate (1), described metal ground (3) is for being coupled with the signal that open feeder (5) receives;
When a signal is received:
Described radiation patch (2), for responding to signal and the energy of read write line transmitting, and is sent to described open feeder (5) and described patch line (6);
Described open feeder (5), the signal sent for receiver radiation paster (1) and energy and with metal (3) be coupled after be sent to passive RF chip (7);
Described patch line (6), the signal sent for receiver radiation paster (1) and energy also pass to described passive RF chip (7);
Described passive RF chip (7), for receiving the signal and energy that open feeder (5) and patch line (6) send, and utilizes the energy received to process to the received signal;
When described label is used for transmitting:
Described passive RF chip (7), for carrying out processing according to the signal of the read write line received and send processing signals to open feeder (5) and patch line (6);
Described open feeder (5), for receive signal that passive RF chip (7) sends and with metal (3) be coupled after be passed to radiation patch (1);
Described patch line (6), for receiving signal that passive RF chip (7) sends and being passed to radiation patch (1);
Described radiation patch (1), for receiving signal that open feeder (5) and patch line (6) send and being radiated to space.
2. a kind of whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 1, it is characterized in that, described medium substrate (1) is the cuboid thin plate adopting FR4 material to make, and thickness is 0.01 λ, and λ is the effective wavelength of operating frequency of antenna; Described metal ground (3) adopts copper product to make, and covers described medium substrate (1) lower surface.
3. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 1, it is characterized in that, described open feeder (5) is the T-shaped shape be made up of vertical section (51) and traversing section (52), described vertical section (51) one end connected with passive radio frequency chip (7), the other end is connected with described traversing section (52), and described vertical section (51) is positioned on a wherein center line of described medium substrate (1), described center line is parallel with the long limit of described medium substrate (1); The width of described vertical section (51) is 3mm.
4. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 3, it is characterized in that, described patch line (6) is the rectangle adopting copper sheet to make, the region leaving preset area between described patch line (6) and described vertical section (51) is placed for described passive RF chip (7), and described patch line (6) and passive RF chip (7) all with described vertical section (51) conllinear.
5. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 4, is characterized in that, the length of described patch line (6) is 3mm, and width is 2mm;
The Breadth Maximum of described passive RF chip (7) is 3mm.
6. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 3, it is characterized in that, described radiation patch (2) is " U " type structure adopting copper product to make, and the line of symmetry of described radiation patch (2) is positioned on the straight line at described vertical section (51) place.
7. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 6, it is characterized in that, a pair arm lengths of described radiation patch (2) is 9.5mm, width is 1mm, the end length of described radiation patch (2) is 49mm, and width is 44mm; And the end of described radiation patch (2) is 5mm with the corresponding frame distance of described medium substrate (1).
8. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 6, it is characterized in that, the opening direction of described U-lag (4) is contrary with the opening direction of described radiation patch (2), and described U-lag (4) is symmetrical about the straight line at described vertical section (51) place, the distance between described U-lag (4) and described patch line (6) is 4mm.
9. the whole plane structural antenna for UHF radio frequency identification anti-metal tag according to claim 8, it is characterized in that, a pair arm lengths of described U-lag (4) is 23.25mm, width is 5mm, the end length of described U-lag (4) is 30mm, and width is 5.25mm.
10. the signal for the antenna of UHF radio frequency identification anti-metal tag is launched, method of reseptance, it is characterized in that,
When for transmitting, comprise the following steps:
Passive RF chip (7) carries out processing according to the signal of the read write line received and sends processing signals to open feeder (5) and patch line (6);
Open feeder (5) receive passive RF chip (7) signal that sends and with metal (3) be coupled after be passed to radiation patch (1);
The signal that patch line (6) reception passive RF chip (7) sends also is passed to radiation patch (1);
The signal that radiation patch (1) reception open feeder (5) and patch line (6) send also is radiated to space;
When for Received signal strength, comprise the following steps:
The signal that described radiation patch (1) induction read write line is launched and energy, and be sent to described open feeder (5) and described patch line (6);
The signal that described open feeder (5) receiver radiation paster (1) sends and energy and with metal (3) be coupled after be sent to passive RF chip (7);
The signal that described patch line (6) receiver radiation paster (1) sends and energy also pass to described passive RF chip (7);
The signal that described passive RF chip (7) reception open feeder (5) and patch line (6) send and energy, and utilize the energy received to process to the received signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510621832.XA CN105305040A (en) | 2015-09-25 | 2015-09-25 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510621832.XA CN105305040A (en) | 2015-09-25 | 2015-09-25 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
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| CN110110834A (en) * | 2019-04-15 | 2019-08-09 | 同济大学 | Passive and wireless RFID displacement sensor and sensor-based system based on inverse-F antenna |
| CN111864351A (en) * | 2019-04-30 | 2020-10-30 | 电连技术股份有限公司 | Microstrip array antenna |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
| CN112421237A (en) * | 2020-12-08 | 2021-02-26 | 南京商业学校(南京市鼓楼中等专业学校) | Dual-polarized tag antenna patch for logistics management and positioning method |
| WO2021096200A1 (en) * | 2019-11-15 | 2021-05-20 | 동우화인켐 주식회사 | Antenna package and image display device comprising same |
| CN112928457A (en) * | 2019-12-06 | 2021-06-08 | 北京华航无线电测量研究所 | RFID (radio frequency identification) tag antenna |
| CN113314829A (en) * | 2021-06-18 | 2021-08-27 | 合肥工业大学 | Radio frequency identification ultrahigh frequency band tag antenna applied to metal environment |
| CN113937483A (en) * | 2021-10-14 | 2022-01-14 | 合肥工业大学 | Low-profile anti-metal tag antenna applied to ultrahigh frequency band |
| CN115587610A (en) * | 2022-11-18 | 2023-01-10 | 北京智芯微电子科技有限公司 | Anti-metal electronic tag and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110110834A (en) * | 2019-04-15 | 2019-08-09 | 同济大学 | Passive and wireless RFID displacement sensor and sensor-based system based on inverse-F antenna |
| CN110110834B (en) * | 2019-04-15 | 2024-04-26 | 同济大学 | Passive wireless RFID displacement sensor and sensing system based on inverted F antenna |
| CN111864351A (en) * | 2019-04-30 | 2020-10-30 | 电连技术股份有限公司 | Microstrip array antenna |
| CN111864351B (en) * | 2019-04-30 | 2023-06-27 | 电连技术股份有限公司 | Microstrip array antenna |
| WO2021096200A1 (en) * | 2019-11-15 | 2021-05-20 | 동우화인켐 주식회사 | Antenna package and image display device comprising same |
| CN112928457A (en) * | 2019-12-06 | 2021-06-08 | 北京华航无线电测量研究所 | RFID (radio frequency identification) tag antenna |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
| CN112421237A (en) * | 2020-12-08 | 2021-02-26 | 南京商业学校(南京市鼓楼中等专业学校) | Dual-polarized tag antenna patch for logistics management and positioning method |
| CN112421237B (en) * | 2020-12-08 | 2024-06-07 | 南京商业学校(南京市鼓楼中等专业学校) | Dual-polarized tag antenna patch for logistics management and positioning method |
| CN113314829A (en) * | 2021-06-18 | 2021-08-27 | 合肥工业大学 | Radio frequency identification ultrahigh frequency band tag antenna applied to metal environment |
| CN113937483A (en) * | 2021-10-14 | 2022-01-14 | 合肥工业大学 | Low-profile anti-metal tag antenna applied to ultrahigh frequency band |
| CN115587610A (en) * | 2022-11-18 | 2023-01-10 | 北京智芯微电子科技有限公司 | Anti-metal electronic tag and manufacturing method |
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Application publication date: 20160203 |