CN112038750A - Anti-metal tag antenna applied to UHF frequency band - Google Patents
Anti-metal tag antenna applied to UHF frequency band Download PDFInfo
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- CN112038750A CN112038750A CN202010922411.1A CN202010922411A CN112038750A CN 112038750 A CN112038750 A CN 112038750A CN 202010922411 A CN202010922411 A CN 202010922411A CN 112038750 A CN112038750 A CN 112038750A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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Abstract
The invention relates to an anti-metal tag antenna applied to a UHF frequency band, and belongs to the technical field of radio frequency identification electronic tags. The radio frequency identification tag comprises a tag chip, a radiation patch, a dielectric substrate and a metal bottom plate; a T-shaped groove is formed in one side of the radiation patch, and the T-shaped groove is a surface current distribution adjusting groove and used for adjusting the central frequency of the tag antenna; the strip-shaped radiating arm and the L-shaped radiating arm are connected to form an open-circuit stub feeding structure, and a U-shaped groove is formed between the open-circuit stub feeding structure and the radiating patch; the U-shaped groove is an impedance adjusting groove; the impedance of the tag is adjusted by changing the length and the width of the U-shaped groove; the tag chip is arranged on a connecting line which is connected with the strip-shaped radiation arm and the radiation patch, and the tag chip is fed through the open circuit stub structure. The central frequency band of the anti-metal tag antenna is 900MHz-930MHz, and the gain variation range in the central frequency band is-5.7 dBi to-0.94 dBi. In a metal environment, the maximum identification distance of the anti-metal tag antenna is 5.46 m.
Description
Technical Field
The invention belongs to the technical field of radio frequency identification electronic tags, relates to a radio frequency identification electronic tag, and particularly relates to an anti-metal tag antenna working in an ultrahigh frequency band.
Background
In the application of Radio Frequency Identification (RFID), a tag is usually attached to an object to be identified, and because the shape, size, surface material, application environment, and the like of the tag are different, when an RFID electronic tag is attached to an object having a metal surface, the directional characteristic, impedance characteristic, and resonant Frequency of the tag antenna are changed, so that the gain of the tag antenna is rapidly attenuated, and the tag antenna cannot normally operate.
The ultrahigh frequency band radio frequency tag is very sensitive to metal, and when the ultrahigh frequency tag is placed on the surface of the metal, the reading distance of the tag can be rapidly reduced, even the tag cannot be read. Therefore, in order to avoid the above phenomenon to limit the application of the RFID tag in the metal environment, the prior art mainly improves the reading condition of the RFID tag in the metal environment by the following ways:
the first is that the reader sends out the interrogation signal vertical to the metal surface by adjusting the distance between the tag antenna and the metal surface, and the interrogation signal is reflected and then superposed with the incoming wave to form a standing wave, the electric field amplitude is minimum at the position where the distance between the tag and the metal boundary is zero, and the electric field amplitude is maximum at the position where the distance is one quarter wavelength. Therefore, when the tag is one quarter wavelength away from the metal surface, the maximum energy can be obtained by the tag antenna, the reading distance of the tag is improved, but the thickness of the tag is inevitably increased by the method, and the thickness of the tag using the method reaches 8cm at 915 MHz. And the second is that when the tag is directly attached to the metal surface, the reduction of the antenna radiation efficiency caused by the mirror current and the interference signal can be overcome to a certain extent by adopting the wave-absorbing material, and the wave-absorbing material has excellent performance, but has high cost and is difficult to be widely applied to tag design. The third is to use a high dielectric substrate, the high impedance surface is a metamaterial structure, which exhibits magnetic wall properties over a frequency range that depends on the basic geometric properties of the structure. The high-impedance surface can inhibit the propagation of surface waves in the patch antenna, so that the directional gain of the tag antenna is improved, the backward radiation and the sidelobe level are reduced, the antenna is kept at a thin thickness to a certain extent, and the general high-impedance surface has a complex structure, so that the processing is difficult, the manufacturing cost is increased, and the tag antenna is not beneficial to large-scale use.
Disclosure of Invention
In order to solve the problems that the tag antenna is applied to a metal environment and the defects that the existing anti-metal tag is large in size and difficult to process are overcome, the invention provides the anti-metal tag antenna applied to the UHF frequency band.
An anti-metal tag antenna applied to a UHF frequency band comprises a tag chip 3, a radiation patch, a dielectric substrate 7 and a metal bottom plate 8, wherein the radiation patch, the dielectric substrate 7 and the metal bottom plate 8 are sequentially connected to form an antenna body;
the radiation patch is rectangular, a T-shaped groove 1 is formed in one side of the radiation patch, a horizontal groove of the T-shaped groove 1 is parallel to a short edge of the radiation patch, and a vertical groove of the T-shaped groove 1 penetrates through the short edge of one side of the radiation patch and is perpendicular to the short edge of the radiation patch; the T-shaped groove is a surface current distribution adjusting groove and is used for adjusting the central frequency of the tag antenna;
a process groove is formed in the other side of the radiation patch corresponding to the horizontal groove of the T-shaped groove 1, the process groove and the vertical groove of the T-shaped groove 1 are in a straight line, and the process groove penetrates through the short edge of the other side of the radiation patch; the groove width of the process groove is larger than that of the vertical groove of the T-shaped groove 1; a strip-shaped radiation arm 4 is arranged in the process groove, and one end of the strip-shaped radiation arm 4 corresponding to the horizontal groove of the T-shaped groove 1 is connected with a radiation patch through a connecting wire; the other end of the strip-shaped radiation arm 4 extends to the outside of the process tank and is connected with the short arm end of the L-shaped radiation arm 2, the short arm of the L-shaped radiation arm 2 is parallel to the outside of the short edge of the other side of the radiation patch, and the long arm of the L-shaped radiation arm 2 is parallel to the outside of the long edge of one side of the radiation patch; the strip-shaped radiating arm 4 and the L-shaped radiating arm 2 are connected to form an open-circuit stub feeding structure, and a U-shaped groove 6 is formed between the open-circuit stub feeding structure and the radiating patch;
the U-shaped groove 6 is an impedance adjusting groove; the impedance of the tag is adjusted by changing the length and the width of the U-shaped groove;
the tag chip 3 is arranged on a connecting line connecting the strip-shaped radiation arm 4 and the radiation surface 5 and is in an open-circuit stub structure
Feeding power to the tag chip 3;
the central frequency band of the anti-metal tag antenna is 900MHz-930MHz, and the gain variation range in the central frequency band is-5.7 dBi to-0.94 dBi;
the technical scheme for further limiting is as follows:
the material of the radiation patch and the material of the metal bottom plate 8 are both copper, and the thickness of the radiation patch and the thickness of the metal bottom plate 8 are both 0.2 mm; the dielectric substrate 7 is an FR4 dielectric substrate, and the thickness is 3.0 mm.
The T-shaped groove 1 adopts a metal etching process, the vertical groove size of the T-shaped groove 1 is W5 x (L5-L6) is 22mm x 3mm, and the horizontal groove size of the T-shaped groove 1 is W6 x L6 is 1.6mm x 29 mm.
The L-shaped radiating arm 2 has a short arm dimension W2 × W7 of 2.5mm × 28mm and a long arm dimension W7 × L2 of 2.5mm × 28 mm.
The dimensions of the dielectric substrate 7 and the metal bottom plate 8 are W1 multiplied by L1 which is 40mm multiplied by 80 mm.
Compared with the prior art, the invention has the beneficial technical effects in the following aspects:
1. the anti-metal tag antenna has the advantages of simple structure, small volume and size reduction by more than 25% compared with the conventional antenna. On the basis of a general open-circuit stub microstrip antenna, the open-circuit stub is changed into an existing L-shaped bent shape from an original strip shape by adopting a bending technology, so that the volume of the antenna is effectively reduced, and meanwhile, a T-shaped groove is formed on a radiation surface by adopting an etching technology, so that the bandwidth of the antenna is increased, and the central frequency of the tag antenna is conveniently adjusted; no via hole or short circuit structure, and good manufacturing manufacturability.
2. The open-circuit stub feeding part of the tag antenna is positioned in the U-shaped groove 6 of the radiation patch, the self impedance of the tag antenna can be changed by adjusting the depth and the width of the U-shaped groove, the self impedance of the tag antenna can be changed by changing the length and the width of the open-circuit stub feeding part, the total impedance of the tag antenna is equal to the impedance of the radiation patch plus the impedance of the open-circuit stub, and the reactance of the open-circuit stub is adjusted within a range of- ∞ to + ∞, so that the reactance of the input impedance of the antenna can be increased or reduced in a larger range on the basis of the impedance of the radiation microstrip line, and the impedance matching of the tag antenna and a tag.
3. The bottom of the anti-metal label antenna is provided with the metal bottom plate, the length and the width of the metal bottom plate are equal to those of the dielectric substrate, and the metal bottom plate is used as a part of the antenna, so that the antenna has anti-metal performance at the beginning of design and can be normally used in a non-metal environment.
4. Tests show that the tag antenna has good performance in a metal environment, the tag has a far identification distance in a free space, the bandwidth of the antenna is 880MHz-940MHz in minus 3dBi, the return loss of the antenna is minus 38.6dBi at 915MHz, and the performance of the antenna exceeds the performance of a common antenna.
5. The tag antenna has small volume and a planar structure, so that a printed circuit board can be used as a substrate to form a PCB tag, which not only realizes miniaturization, but also has the advantages of easy debugging and batch production of the PCB tag.
Drawings
FIG. 1 is a three-dimensional perspective view of a metal-tag resistant antenna of the present invention;
FIG. 2 is a top view of the anti-metal tag antenna of the present invention;
FIG. 3 is a length dimension chart of a radiation patch of the anti-metal tag antenna according to the present invention;
FIG. 4 is a drawing of the width dimension of the radiation patch of the anti-metal tag antenna of the present invention;
FIG. 5 is a power reflection function diagram (S) of the metal-tag-resistant antenna of the present invention under a metal environment and a non-metal environment11）
FIG. 6 is a diagram of the power reflection function (S) of a public-version tag antenna Alien9662 under a metal environment and a nonmetal environment11）；
FIG. 7 is a diagram of the simith impedance matching circle of the anti-metal tag antenna of the present invention;
FIG. 8 is a three-dimensional gain diagram of the anti-metal tag antenna of the present invention;
FIG. 9 is a graph of the reading distance of the anti-metal tag antenna of the present invention under metal and non-metal environments;
fig. 10 is a reading distance diagram of the public version tag antenna Alien9662 under a metal environment and a non-metal environment.
Sequence numbers in the upper figure: t-shaped groove 1, L-shaped radiation arm 2, label chip 3, strip-shaped radiation arm 4, radiation surface 5, U-shaped groove 6, dielectric substrate 7 and metal bottom plate 8.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings.
Example 1
Referring to fig. 1, an anti-metal tag antenna applied to a UHF band includes a tag chip 3, a radiation patch, a dielectric substrate 7 and a metal base plate 8, wherein the radiation patch, the dielectric substrate 7 and the metal base plate 8 are sequentially connected to form an antenna body. The material of the radiation patch and the material of the metal bottom plate 8 are both copper, and the thickness of the radiation patch and the thickness of the metal bottom plate 8 are both 0.2 mm; the dielectric substrate 7 is made of FR4 dielectric substrate and has a thickness of 3.0 mm.
Referring to fig. 3 and 4, the dimensions of the dielectric substrate 7 and the metal base plate 8 are W1 × L1, which is 40mm × 80 mm. The partial dimensions W3=11mm, W4=12mm, L3=66mm, L7=39mm in the radiation patch.
Referring to fig. 2, the radiation patch is rectangular, a T-shaped groove 1 is formed in one side of the radiation patch, a horizontal groove of the T-shaped groove 1 is parallel to a short side of the radiation patch, and a vertical groove of the T-shaped groove 1 penetrates through the short side of one side of the radiation patch and is perpendicular to the short side of the radiation patch. The T-shaped groove is a surface current distribution adjusting groove and is used for adjusting the center frequency of the tag antenna.
Referring to fig. 3 and 4, the T-shaped groove 1, which is composed of two rectangular grooves, has a horizontal groove size of W5 × (L5-L6) of 22mm × 3mm and a vertical groove size of W6 × L6 of 1.6mm × 29 mm.
Referring to fig. 2, a process groove is formed in the other side of the radiation patch corresponding to the horizontal groove of the T-shaped groove 1, and the process groove and the vertical groove of the T-shaped groove 1 are in a straight line and penetrate through the short edge of the other side of the radiation patch; the groove width of the process groove is larger than the groove width of the vertical groove of the T-shaped groove 1. A strip-shaped radiation arm 4 is arranged in the process groove, and one end of the strip-shaped radiation arm 4 corresponding to the horizontal groove of the T-shaped groove 1 is connected with a radiation patch through a connecting wire; the other end of the strip-shaped radiation arm 4 extends to the outside of the process tank and is connected with the short arm end of the L-shaped radiation arm 2, the short arm of the L-shaped radiation arm 2 is parallel to the outside of the short edge of the other side of the radiation patch, and the long arm of the L-shaped radiation arm 2 is parallel to the outside of the long edge of one side of the radiation patch; the strip-shaped radiating arm 4 and the L-shaped radiating arm 2 are connected to form an open-circuit stub feeding structure, and a U-shaped groove 6 is formed between the open-circuit stub feeding structure and the radiating patch; the U-shaped groove 6 is an impedance adjusting groove; the impedance of the tag is adjusted by changing the length and the width of the U-shaped groove.
Referring to fig. 3 and 4, the L-shaped radiating arm 2 is composed of two rectangular patches, a rectangular patch size W2 × W7 of the short arm is 2.5mm × 28mm, and a rectangular patch size W7 × L2 of the long arm is 2.5mm × 28 mm.
Referring to fig. 2, the tag chip 3 is disposed on a connection line connecting the strip-shaped radiation arm 4 and the radiation surface 5, and the tag chip 3 is fed through the open stub structure.
The impedance and the resonant frequency of the tag antenna are adjusted by adjusting the size of the T-shaped groove and the L-shaped radiating arm 2, the tag antenna is tested in a metal-free environment, the test result can be seen from fig. 5, the central resonant frequency in the metal-free environment is 915MHz, the return loss is-38.6 dB, and the working bandwidth of 60MHz is provided; under the metal environment, the central resonance frequency is 920MHz, the return loss is-23.47 dB, the visible metal environment has little influence on the tag, and the tag can be normally used.
In order to highlight the metal resistance of the metal-resistant tag antenna, a performance comparison experiment with a public version tag Alien9662 is carried out, and as can be obviously seen from an experiment result shown in FIG. 6, when the Alien9662 tag antenna is attached to a metal surface, the center frequency of the antenna is seriously deviated, and the working bandwidth is basically zero.
As shown in FIG. 7, which is a Smith chart of the anti-metal tag antenna of the present invention, it can be seen from the experimental results report that the normalized impedance at 915MHz is (0.9667-0.0063 j) Ω, and a good impedance matching state is achieved.
As shown in fig. 8, which is a three-dimensional directional gain diagram of the anti-metal tag antenna of the present invention, the maximum gain obtained by the antenna at 915MHz operating frequency is-0.94 dB, which meets the design requirement.
As shown in fig. 9, the distance graph is read in a metal environment and a free space under an ideal matching state of the anti-metal tag antenna, a formula is used for calculation, the reader-writer outputs equivalent isotropic radiation power EIRP =33dBm, the sensitivity of the tag chip is-18 dBm, and a calculation simulation result shows that the anti-metal tag antenna has a good identification distance in both a metal environment and a non-metal environment, and the maximum identification distance of the anti-metal tag antenna is 5.46 m.
In order to highlight the metal resistance of the metal-resistant tag antenna, a performance comparison experiment with a public version tag Alien9662 is carried out, and as is obvious from an experiment result chart 10, when the Alien9662 tag antenna is attached to a metal surface, the reading distance is basically 0, and the metal-resistant tag antenna cannot be normally used.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the scope of the present invention.
Claims (5)
1. The utility model provides an anti metal label antenna for UHF frequency channel, includes tag chip (3), radiation paster, dielectric substrate (7) and metal soleplate (8), wherein radiation paster, dielectric substrate (7) and metal soleplate (8) connect gradually and constitute the antenna body, its characterized in that:
the radiation patch is rectangular, a T-shaped groove (1) is formed in one side of the radiation patch, a horizontal groove of the T-shaped groove (1) is parallel to a short edge of the radiation patch, and a vertical groove of the T-shaped groove (1) penetrates through the short edge of one side of the radiation patch and is perpendicular to the short edge of the radiation patch; the T-shaped groove is a surface current distribution adjusting groove;
a process groove is formed in the other side of the radiation patch corresponding to the horizontal groove of the T-shaped groove (1), the process groove and the vertical groove of the T-shaped groove (1) are in a straight line, and the process groove penetrates through the short edge of the other side of the radiation patch; the groove width of the process groove is larger than that of a vertical groove of the T-shaped groove (1); a strip-shaped radiation arm (4) is arranged in the process groove, and one end of the strip-shaped radiation arm (4) corresponding to the horizontal groove of the T-shaped groove (1) is connected with a radiation patch through a connecting wire; the other end of the strip-shaped radiation arm (4) extends to the outside of the process groove and is connected with the short arm end of the L-shaped radiation arm (2), the short arm of the L-shaped radiation arm (2) is parallel to the outside of the short edge of the other side of the radiation patch, and the long arm of the L-shaped radiation arm (2) is parallel to the outside of the long edge of one side of the radiation patch; the strip-shaped radiating arm (4) and the L-shaped radiating arm (2) are connected to form an open-circuit stub feeding structure, and a U-shaped groove (6) is formed between the open-circuit stub feeding structure and the radiating patch; the U-shaped groove (6) is an impedance adjusting groove;
the tag chip (3) is arranged on a connecting line connecting the strip-shaped radiation arm (4) and the radiation surface (5), and the tag chip (3) is fed through an open circuit stub structure;
the central frequency band of the anti-metal label antenna is 900MHz-930MHz, and the gain variation range of the central frequency band is-5.7 dBi to-0.94 dBi.
2. The metal tag antenna applied to the metal environment as claimed in claim 1, wherein: the material of the radiation patch and the material of the metal bottom plate (8) are both copper, and the thickness of the radiation patch and the thickness of the metal bottom plate (8) are both 0.2 mm; the dielectric substrate (7) is an FR4 dielectric substrate, and the thickness is 3.0 mm.
3. The metal tag antenna applied to the metal environment as claimed in claim 1, wherein: the T-shaped groove (1) adopts a metal etching process, the vertical groove size of the T-shaped groove (1) is W5X (L5-L6) is 22mm X3 mm, and the horizontal groove size of the T-shaped groove (1) is W6X L6 is 1.6mm X29 mm.
4. The metal tag antenna applied to the metal environment as claimed in claim 1, wherein: the short arm size of the L-shaped radiation arm (2) is W2 multiplied by W7 and 2.5mm multiplied by 28mm, and the long arm size of the L-shaped radiation arm is W7 multiplied by L2 and 2.5mm multiplied by 28 mm.
5. The metal tag antenna applied to the metal environment as claimed in claim 1, wherein: the sizes of the dielectric substrate (7) and the metal bottom plate (8) are W1 multiplied by L1 which is 40mm multiplied by 80 mm.
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| CN202010922411.1A CN112038750A (en) | 2020-09-04 | 2020-09-04 | Anti-metal tag antenna applied to UHF frequency band |
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| CN202010922411.1A CN112038750A (en) | 2020-09-04 | 2020-09-04 | Anti-metal tag antenna applied to UHF frequency band |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114665259A (en) * | 2022-04-15 | 2022-06-24 | 合肥工业大学 | Ultra-wideband tag antenna suitable for metal liquid cross-coupling environment |
| CN114709604A (en) * | 2021-12-21 | 2022-07-05 | 北京悦米科技有限公司 | UHF frequency channel board carries antenna |
| CN114914677A (en) * | 2022-05-05 | 2022-08-16 | 福州大学 | Ultrahigh frequency RFID double-sided anti-metal tag antenna with high power transmission coefficient |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060214798A1 (en) * | 2005-03-28 | 2006-09-28 | Chih-Hsin Wang | Semiconductor structure with RF element |
| US20080158085A1 (en) * | 2006-12-29 | 2008-07-03 | Delta Networks, Inc. | Antenna structure and method for increasing its bandwidth |
| CN201117799Y (en) * | 2007-11-30 | 2008-09-17 | 华南理工大学 | UHF RFID electronic label antenna possessing broad band characteristic |
| CN101309639A (en) * | 2005-10-24 | 2008-11-19 | 鲍尔卡斯特公司 | Method and apparatus for high efficiency rectification for various loads |
| US20090238251A1 (en) * | 2007-01-31 | 2009-09-24 | Broadcom Corporation | Apparatus for managing frequency use |
| KR20090105053A (en) * | 2008-04-01 | 2009-10-07 | 경희대학교 산학협력단 | Near Isotropic RFID Tag Antenna in UHF band |
| WO2010049984A1 (en) * | 2008-10-27 | 2010-05-06 | 三菱電機株式会社 | Wireless communication apparatus |
| CN101777693A (en) * | 2010-03-12 | 2010-07-14 | 浙江大学 | Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure |
| CN101814648A (en) * | 2009-02-24 | 2010-08-25 | 富士通株式会社 | Antenna and the equipment that is equipped with described antenna |
| US20100244991A1 (en) * | 2009-03-30 | 2010-09-30 | Takanori Washiro | Communication device and high-frequency coupler |
| JP2011090444A (en) * | 2009-10-21 | 2011-05-06 | Toppan Printing Co Ltd | Non-contact ic label |
| WO2014206579A1 (en) * | 2013-06-29 | 2014-12-31 | Féinics Amatech Teoranta | Booster antenna configurations and methods |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN106602284A (en) * | 2016-11-30 | 2017-04-26 | 南京邮电大学 | Small-scale metal-resistant broadband tag antenna |
| CN108593713A (en) * | 2018-04-20 | 2018-09-28 | 武汉理工大学 | Passive and wireless paster antenna sensor based on RFID technique and wireless measurement method |
| CN108987919A (en) * | 2018-07-24 | 2018-12-11 | 西安电子科技大学 | A kind of polygon ultra-wideband antenna of compact unsymmetric structure |
| CN208596790U (en) * | 2015-07-06 | 2019-03-12 | 株式会社村田制作所 | Antenna assembly and electronic equipment |
| US11121896B1 (en) * | 2020-11-24 | 2021-09-14 | At&T Intellectual Property I, L.P. | Low-resolution, low-power, radio frequency receiver |
-
2020
- 2020-09-04 CN CN202010922411.1A patent/CN112038750A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060214798A1 (en) * | 2005-03-28 | 2006-09-28 | Chih-Hsin Wang | Semiconductor structure with RF element |
| CN101309639A (en) * | 2005-10-24 | 2008-11-19 | 鲍尔卡斯特公司 | Method and apparatus for high efficiency rectification for various loads |
| US20080158085A1 (en) * | 2006-12-29 | 2008-07-03 | Delta Networks, Inc. | Antenna structure and method for increasing its bandwidth |
| US20090238251A1 (en) * | 2007-01-31 | 2009-09-24 | Broadcom Corporation | Apparatus for managing frequency use |
| CN201117799Y (en) * | 2007-11-30 | 2008-09-17 | 华南理工大学 | UHF RFID electronic label antenna possessing broad band characteristic |
| KR20090105053A (en) * | 2008-04-01 | 2009-10-07 | 경희대학교 산학협력단 | Near Isotropic RFID Tag Antenna in UHF band |
| WO2010049984A1 (en) * | 2008-10-27 | 2010-05-06 | 三菱電機株式会社 | Wireless communication apparatus |
| CN101814648A (en) * | 2009-02-24 | 2010-08-25 | 富士通株式会社 | Antenna and the equipment that is equipped with described antenna |
| US20100244991A1 (en) * | 2009-03-30 | 2010-09-30 | Takanori Washiro | Communication device and high-frequency coupler |
| JP2011090444A (en) * | 2009-10-21 | 2011-05-06 | Toppan Printing Co Ltd | Non-contact ic label |
| CN101777693A (en) * | 2010-03-12 | 2010-07-14 | 浙江大学 | Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure |
| WO2014206579A1 (en) * | 2013-06-29 | 2014-12-31 | Féinics Amatech Teoranta | Booster antenna configurations and methods |
| CN208596790U (en) * | 2015-07-06 | 2019-03-12 | 株式会社村田制作所 | Antenna assembly and electronic equipment |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN106602284A (en) * | 2016-11-30 | 2017-04-26 | 南京邮电大学 | Small-scale metal-resistant broadband tag antenna |
| CN108593713A (en) * | 2018-04-20 | 2018-09-28 | 武汉理工大学 | Passive and wireless paster antenna sensor based on RFID technique and wireless measurement method |
| CN108987919A (en) * | 2018-07-24 | 2018-12-11 | 西安电子科技大学 | A kind of polygon ultra-wideband antenna of compact unsymmetric structure |
| US11121896B1 (en) * | 2020-11-24 | 2021-09-14 | At&T Intellectual Property I, L.P. | Low-resolution, low-power, radio frequency receiver |
Non-Patent Citations (2)
| Title |
|---|
| 张桥等: "UHF频段抗金属标签天线的分析与设计", 《电子科技》 * |
| 章国庆: "无源超高频抗金属标签天线设计方法综述", 《电讯技术》 * |
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|---|---|---|---|---|
| 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 |
| CN114709604A (en) * | 2021-12-21 | 2022-07-05 | 北京悦米科技有限公司 | UHF frequency channel board carries antenna |
| CN114665259A (en) * | 2022-04-15 | 2022-06-24 | 合肥工业大学 | Ultra-wideband tag antenna suitable for metal liquid cross-coupling environment |
| CN114665259B (en) * | 2022-04-15 | 2023-04-25 | 合肥工业大学 | Ultra-wideband tag antenna suitable for metal-liquid mutual coupling environment |
| CN114914677A (en) * | 2022-05-05 | 2022-08-16 | 福州大学 | Ultrahigh frequency RFID double-sided anti-metal tag antenna with high power transmission coefficient |
| CN114914677B (en) * | 2022-05-05 | 2023-03-31 | 福州大学 | Ultrahigh frequency RFID double-sided anti-metal tag antenna with high power transmission coefficient |
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