CN113972466A - Ultrahigh frequency radio frequency identification tag antenna and pig ear tag - Google Patents
Ultrahigh frequency radio frequency identification tag antenna and pig ear tag Download PDFInfo
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- CN113972466A CN113972466A CN202010724895.9A CN202010724895A CN113972466A CN 113972466 A CN113972466 A CN 113972466A CN 202010724895 A CN202010724895 A CN 202010724895A CN 113972466 A CN113972466 A CN 113972466A
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- 229910052751 metal Inorganic materials 0.000 claims description 84
- 239000002184 metal Substances 0.000 claims description 84
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 72
- 229910052782 aluminium Inorganic materials 0.000 claims description 53
- 239000000463 material Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 13
- 239000004411 aluminium Substances 0.000 description 10
- 241001481760 Erethizon dorsatum Species 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
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- 241001465754 Metazoa Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 238000013329 compounding Methods 0.000 description 1
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K11/00—Marking of animals
- A01K11/001—Ear-tags
- A01K11/004—Ear-tags with electronic identification means, e.g. transponders
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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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
- 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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- 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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Animal Husbandry (AREA)
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- Birds (AREA)
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Abstract
The invention provides an ultrahigh frequency radio frequency identification tag antenna and a pig ear tag, which utilize a resonance frequency point tuning structure with a symmetrical structure to adjust the resonance frequency point of the tag antenna, and utilize an impedance matching tuning structure at the inner side of the resonance frequency point tuning structure to realize impedance matching with a radio frequency identification chip. The resonance frequency point tuning structure and the impedance matching tuning structure are fixed at the rear end of the common mark through a disc plane and are sealed by an upper cover substrate and a lower cover substrate. The radio frequency identification pig ear tag provided by the invention can realize return loss of-20 dB in a UHF frequency band, has a longer reading distance, and can still ensure better reading efficiency under the condition of being attached to the surface of the pig ear tag.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to an ultrahigh frequency radio frequency identification tag antenna and a pig ear tag.
Background
Ultra high frequency radio frequency identification (UHF RFID for short) is a remote automatic identification technology that reads tag information by using microwave radio frequency. The ultrahigh frequency radio frequency identification minimum system generally comprises a Reader (Reader) and a Tag (Tag). The reader activates the passive tag by microwave radio frequency and reads the information stored on the tag. Compared with the traditional bar code technology, the ultrahigh frequency radio frequency identification technology has the advantages of long reading distance, high reading speed, invisible identification, support of fast reading and writing and the like; the ultrahigh frequency radio frequency identification technology is combined with the technologies such as the internet, a wireless communication network and the like, and the tracking and information sharing of articles in the global range can be realized. The method has wide application space in a plurality of fields such as logistics supply chain, production automation, public information service, traffic management, military application and the like. The ultrahigh frequency radio frequency identification technology reads data through electromagnetic wave propagation and has a long reading distance. The ultrahigh frequency radio frequency identification technology mainly comprises two parts of wireless energy transmission and backscatter modulation, and the ultrahigh frequency radio frequency identification technology activates a label through the wireless energy transmission; the information stored on the tag is acquired by backscatter modulation. The ultrahigh frequency reading technology has the advantages of long reading distance, low cost and the like, so that the ultrahigh frequency reading technology is expected to be widely applied to the fields of logistics and traffic. Generally, the rfid technology refers to the ultra high frequency rfid technology, which is becoming an important part of the internet of things technology.
In the process of reading the stored information on the tag, the ultrahigh frequency radio frequency identification tag antenna plays an important role in obtaining the energy of the tag and reflecting signals. However, the existing uhf rfid tag antenna usually cannot meet the reading requirement in a farm or farm environment due to the limitation of the structure itself.
Also in farm or farm environments, a significant portion of uhf rfid applications require tags to be attached to the animal ear surface, such as: pig ears, cow ears, sheep ears, etc. to facilitate the collection of tag information. However, since the reading performance of the ordinary RFID tag is poor when the RFID tag is attached to the surface of the ear of an animal, the design of the tag structure is urgently needed.
Especially for the pig tag, when the ordinary pig tag antenna is attached to the pig ear, the tag is easy to be attached to the surface of the pig ear, and the reading effect is affected. Therefore, the existing pig ear tag label often has the problems that the distance for reading the label is too short, the identification and the use are inconvenient, and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the ultrahigh frequency radio frequency identification tag antenna and the pig ear tag. The invention specifically adopts the following technical scheme.
First, in order to achieve the above object, an ultrahigh frequency rfid tag antenna is provided, which includes:
the resonance frequency point tuning structure comprises an outer layer arc structure, a middle layer arc structure arranged on the inner side of the outer layer arc structure and a frequency point tuning connecting line connected between the outer layer arc structure and the middle layer arc structure;
the impedance matching tuning structure comprises an inner layer arc structure arranged on the inner side of the middle layer arc structure and an impedance tuning connecting line connected between the inner layer arc structure and the middle layer arc structure;
the radio frequency identification chip is arranged in the middle of the middle layer arc structure;
the resonance frequency point tuning structure, the impedance matching tuning structure and the radio frequency identification chip are all arranged on the same disc plane, and the resonance frequency point tuning structure and the impedance matching tuning structure all use the diameter of the disc plane where the radio frequency identification chip is located as a symmetry axis.
Optionally, the uhf rfid tag antenna as described in any one of the above, wherein the outer layer arc structure includes:
a left first incomplete circular metal antenna arranged on the left side of the radio frequency identification chip;
the right first incomplete circular metal antenna is arranged on the right side of the radio frequency identification chip;
still be in between the first incomplete circular metal antenna in left side and the first incomplete circular metal antenna in right side the upside and the downside of radio frequency identification chip are provided with the tuning interval respectively.
Optionally, the uhf rfid tag antenna as described in any one of the above, wherein the middle layer arc structure includes:
the right end of the left second incomplete circular metal antenna is electrically connected with the left side of the radio frequency identification chip;
the left end part of the right second incomplete circular metal antenna is electrically connected with the right side of the radio frequency identification chip;
a connecting port is formed between the left second incomplete circular metal antenna and the right second incomplete circular metal antenna on the lower side of the radio frequency identification chip;
and the frequency point tuning connecting line is downwards connected to the lower end of the left first incomplete circular metal antenna and the lower end of the right first incomplete circular metal antenna from the left end and the right end of the connecting port respectively.
Optionally, the ultrahigh frequency rfid tag antenna as described in any of the above, wherein the inner arc structure is a third incomplete circular metal antenna having a tuning port on an upper side thereof, and the third incomplete circular metal antenna is located below the rfid chip;
the impedance tuning connecting line is upwards connected to the middle-layer arc structures on the left side and the right side of the radio frequency identification chip respectively from the left end and the right end of the tuning port.
Optionally, the uhf rfid tag antenna as described in any one of the above, wherein a through hole is further provided on the disc plane, and the through hole is located at an inner center position of the third incomplete circular metal antenna.
Optionally, the ultrahigh frequency rfid tag antenna is one of the above, wherein the resonant frequency point tuning structure and the impedance matching tuning structure are aluminum film antenna patches attached to the upper surface of the disc plane.
Optionally, the ultrahigh frequency rfid tag antenna as described above, wherein the impedance tuning connection line and the impedance tuning connection line are both parallel to a diameter direction of a disc plane where the rfid chip is located.
Optionally, the ultrahigh frequency rfid tag antenna as described above, wherein the upper portions of the disc plane, the resonant frequency point tuning structure, the impedance matching tuning structure, and the rfid chip are sealed by a common tag upper cover substrate, and the lower portions of the disc plane, the resonant frequency point tuning structure, the impedance matching tuning structure, and the rfid chip are sealed by a common tag lower cover substrate;
the male tag upper cover substrate and the male tag lower cover substrate are pressed and fixed, a through hole is further formed in the middle of the male tag upper cover substrate, and the through hole is located above a through hole formed in the inner side of the third incomplete circular metal antenna and used for enabling an ear tag needle to enter the through hole.
Meanwhile, in order to achieve the above object, the present invention also provides a pig ear tag, which comprises:
the male tag is provided with any one of the ultrahigh frequency radio frequency identification tag antennas, and the other end of the male tag is provided with an ear nail protruding out of the front side surface of the tag antenna;
female mark is provided with the mounting hole that can supply the ear nail to pass in the middle of it, the rear end face of the front side butt ear nail of mounting hole, the pig ear is pressed close to the rear side of mounting hole.
Optionally, the pig ear tag is as described in any one of the above, wherein the male tag upper cover substrate and the male tag lower cover substrate in the male tag include but are not limited to TPU, ABS, PP, PE material, and the disc plane between the male tag upper cover substrate and the male tag lower cover substrate is made of PET material.
Advantageous effects
The invention utilizes the resonance frequency point tuning structure with a symmetrical structure to adjust the resonance frequency point of the tag antenna, and utilizes the impedance matching tuning structure at the inner side of the resonance frequency point tuning structure to realize the impedance matching with the radio frequency identification chip. The resonance frequency point tuning structure and the impedance matching tuning structure are fixed at the rear end of the common mark through a disc plane and are sealed by an upper cover substrate and a lower cover substrate. The radio frequency identification pig ear tag provided by the invention can realize the return loss of-20 dB at 915MHz, has a longer reading distance, and can still ensure the reading efficiency of the antenna under the condition of being attached to the surface of the pig ear tag.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of a pig ear tag of the present invention comprising an UHF RFID tag antenna;
FIG. 2 is a top view of a UHF RFID tag antenna therein;
FIG. 3 is a side view of the pig ear tag structure of FIG. 1;
in the figure: public mark lower cover base plate 1, ear nail 2, embedded recess 3, circular inlay4, first incomplete circular metal aluminium antenna 5, second incomplete circular metal aluminium antenna 6, third incomplete circular metal aluminium antenna 7, short straight line metal aluminium antenna 8, long straight line metal aluminium antenna 9, radio frequency identification chip 10, through-hole 11, public mark upper cover base plate 12, female mark 13.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present invention means that the respective single or both of them exist individually or in combination.
The meaning of the 'inside and outside' in the invention means that relative to the pig ear tag itself, the direction from the ear tag shell to the inside of the through hole in the middle of the disc plane is inside, and vice versa; and not as a specific limitation on the mechanism of the device of the present invention.
The meaning of up and down in the invention refers to that when a user faces the disc plane of the UHF RFID tag antenna, the direction of the RFID chip pointing to the circular shape of the disc plane is down, otherwise, the direction is down, and the device mechanism is not specially limited.
The meaning of "left and right" in the present invention means that when a user faces the disc plane of the uhf rfid tag antenna, the left side of the user is left, and the right side of the user is right, rather than a specific limitation on the mechanism of the apparatus of the present invention.
The term "connected" as used herein may mean either a direct connection between the components or an indirect connection between the components via other components.
The meaning of "front and back" in the present invention means that the direction from the upper cover substrate of the male tag to the ear nail is front when the ear tag is punched by the ear tag needle, and vice versa, and is not a specific limitation to the mechanism of the device of the present invention.
Fig. 1 is a pig ear tag according to the present invention, which comprises:
the male tag is provided with an ultrahigh frequency radio frequency identification tag antenna with a disc structure at one end and an ear nail 2 protruding out of the front side surface of the tag antenna at the other end;
The uhf rfid tag antenna disposed at the rear end of the male tag may be specifically configured as the structure shown in fig. 2. It includes:
the resonance frequency point tuning structure comprises an outer layer arc structure, a middle layer arc structure arranged on the inner side of the outer layer arc structure and a frequency point tuning connecting line connected between the outer layer arc structure and the middle layer arc structure;
the impedance matching tuning structure comprises an inner layer arc structure arranged on the inner side of the middle layer arc structure and an impedance tuning connecting line connected between the inner layer arc structure and the middle layer arc structure;
and the radio frequency identification chip 10 is arranged in the middle of the middle layer arc structure.
The resonance frequency point tuning structure, the impedance matching tuning structure and the radio frequency identification chip 10 can be arranged on the same disc plane, and the resonance frequency point tuning structure and the impedance matching tuning structure all use the disc plane diameter of the radio frequency identification chip 10 as a symmetry axis. In this way, the resonant frequency point tuning structure and the impedance matching tuning structure are both set to take a connecting line between the radio frequency identification chip 10 and the circle center of the disc plane as a symmetry axis, and the whole tag antenna structure is symmetrical, so that the radiation directions are uniformly distributed, and tag information can be conveniently and correctly read by tag reading equipment from all directions.
Specifically, referring to fig. 3, the upper sides of the resonance frequency point tuning structure, the impedance matching tuning structure and the rfid chip 10 in the present invention may be configured to be sealed by a common-label upper cover substrate 12 made of TPU, ABS, PP, PE, etc. above the resonance frequency point tuning structure, the impedance matching tuning structure and the rfid chip 10, and the lower sides of the disc plane, the resonance frequency point tuning structure, the impedance matching tuning structure and the rfid chip 10 may be configured to be sealed by a common-label lower cover substrate 1 made of TPU, ABS, PP, PE, etc. below the disc plane, the resonance frequency point tuning structure, the impedance matching tuning structure and the rfid chip 10. The male label upper cover substrate 12 and the male label lower cover substrate 1 can be pressed and fixed through structures such as a clamping groove and a bulge. The ear nail is connected in the outside of accessible lower cover base plate like this, realizes the fixed to tag antenna, and the antenna structure of inside protection through the sealing action between the upper and lower cover base plate does not receive the pollution simultaneously, avoids it to drop.
When the ear mark is marked, in order to guide and ensure the pressing force of the marking on the male mark towards the mounting hole in the middle of the female mark, the middle of the cover substrate 12 of the male mark can be further provided with a through hole. And a through hole 11 can be further arranged at the center of the inner side of the third incomplete circular metal antenna on the disc plane in cooperation with the through hole, and the through hole is just opposite to the through hole 11. Therefore, the ear tag needle can directly transmit the acting force of the tag needle into the mounting hole, and the ear tag needle can be conveniently driven into the mounting hole.
In the invention, the disc plane provided with the tag antenna can be realized by adopting a PET material as the circular inlay4, and the antenna structure can be realized by covering an aluminum film at the corresponding position on the surface. Specifically, the outer layer arc structure in the uhf rfid tag antenna can be specifically realized by the first incomplete circular aluminum metal antenna 5. This first incomplete circular metallic aluminum antenna 5 may be specifically set to include:
a left first incomplete circular metal antenna disposed on the left side of the rfid chip 10;
a right first incomplete circular metal antenna disposed on the right side of the rfid chip 10;
tuning intervals are further arranged between the first incomplete round metal antenna on the left side and the first incomplete round metal antenna on the right side and on the upper side and the lower side of the radio frequency identification chip 10 respectively.
The middle arc-shaped structure can be realized by the second incomplete circular metal aluminum antenna 6. It includes:
a left second incomplete circular metal antenna, the right end of which is electrically connected with the left side of the rfid chip 10;
a second incomplete round metal antenna on the right side, the left end of which is electrically connected with the right side of the radio frequency identification chip 10;
a connection port is formed between the left second incomplete circular metal antenna and the right second incomplete circular metal antenna on the lower side of the radio frequency identification chip 10.
The first incomplete circular metal aluminum antenna 5 and the second incomplete circular metal aluminum antenna 6 are connected through a frequency point tuning connecting line formed by two long straight line metal aluminum antennas 9 to form a plane omega antenna structure. Two long straight line metallic aluminum antennas 9 under incomplete circular the left and right sides, respectively by the connector about both ends downwards, be connected to the lower extreme of the first incomplete circular metallic antenna in left side and the lower extreme of the first incomplete circular metallic antenna in right side respectively. Therefore, the invention can change the resonance frequency point of the antenna by adjusting the radius of the circular arcs of the first incomplete circular metal aluminum antenna 5 and the second incomplete circular metal aluminum antenna 6 and changing the length of the coil of the circular arc antenna. The longer the arc length of the first incomplete circular aluminum metal antenna 5 and the second incomplete circular aluminum metal antenna 6 is, the lower the frequency point is, otherwise, the frequency range corresponding to the frequency point can be increased.
Correspondingly, the inner layer arc structure in the UHF RFID tag antenna can be realized by a third incomplete circular metal aluminum antenna 7. This third incomplete circular metallic aluminum antenna 7 may be specifically set to include: the upper side is provided with a third incomplete circular metal antenna of the tuning port, which is located below the rfid chip 10.
The second incomplete round metal aluminum antenna 6 and the third incomplete round metal aluminum antenna 7 can be connected through an impedance tuning connection line formed by a short straight line metal aluminum antenna 8. The impedance tuning connection line is connected to the middle layer arc structures on the left side and the right side of the radio frequency identification chip 10 from the left end and the right end of the tuning port upwards respectively. And the radio frequency identification chip 10 is positioned right in the middle of the connecting part of the second incomplete circular metal aluminum antenna 6 and the short linear metal aluminum antenna 8. Therefore, the invention can adjust the impedance of the tag antenna by adjusting the radius of the arc of the third incomplete circular metal aluminum antenna 7 and changing the length of the arc antenna coil, so that the impedance of the tag antenna can be matched with the impedance of the radio frequency identification chip 10, and the transmission efficiency of the radio frequency identification signal is improved. The larger the arc of the third incomplete circular aluminum metal antenna 7 is, the larger the reactance corresponding to the tag antenna is.
In a more specific implementation manner, the ultrahigh frequency radio frequency identification tag antenna provided by the invention can be implemented by a mutually-nested planar omega antenna structure and a planar inverted omega antenna structure which are formed by three incomplete circles and four straight lines. The ultrahigh frequency radio frequency identification antenna is attached to the interior of the pig ear tag through an embedded groove 3 between the upper cover substrate of the male tag at the rear end of the pig ear tag and the lower cover substrate of the male tag. The ultra-high frequency radio frequency identification tag antenna for the pig ear tag designed by the invention is described in detail in the radial direction based on an ultra-high frequency radio frequency identification tag chip of TI company RI _ UHF _00001_01 model.
This pig ear tag structure includes: public mark lower cover base plate 1, ear nail 2, embedded recess 3, circular inlay4, first incomplete circular metal aluminium antenna 5, second incomplete circular metal aluminium antenna 6, third incomplete circular metal aluminium antenna 7, short straight line metal aluminium antenna 8, long straight line metal aluminium antenna 9, radio frequency identification chip 10, through-hole 11, public mark upper cover base plate 12, female mark 13.
Wherein, the male-label lower cover substrate 1 is composed of a circular medium. Public mark lower cover base plate 1 lower surface is equipped with ear nail 2, and public mark lower cover base plate 1 upper surface is equipped with embedded recess 3. The embedded groove 3 is connected with the circular inlay4, and a first incomplete circular metal aluminum antenna 5 is arranged in the circular inlay 4. The first incomplete round metal aluminum antenna 5 is located on the outermost side of the round inlay 4. And a second incomplete circular metal aluminum antenna 6 is also arranged in the middle of the circular inlay 4. The first incomplete circular metallic aluminum antenna 5 is connected with the second incomplete circular metallic aluminum antenna 6 through two long straight metallic aluminum antennas 9 at the left and right sides right below the incomplete circle.
The third incomplete circular metal aluminum antenna 7 is used for realizing the adjustment of impedance matching between the antenna and the chip, and is arranged on the inner side of the circular inlay 4. The second incomplete circular metal aluminum antenna 7 can be connected with the third incomplete circular metal aluminum antenna 7 through the two short straight line metal aluminum antennas 8 at the left and right sides right above the incomplete circle.
The radio frequency identification chip 10 is connected with the second incomplete round metal aluminum 6 in the center right above the incomplete round.
In order to match with a through hole in the middle of the male tag upper cover base plate 12 and facilitate the ear tag needle to be pressed, installed and fixed with the ear tag, a circular through hole 11 can be further formed in the center position of the innermost side of the inlay4, and an ear tag needle driving structure is formed.
In this ear tag structure, public mark upper cover base plate 12 links to each other with public mark lower cover base plate 1 through compound mode, and public mark upper cover base plate 12 links to each other with public mark lower cover base plate 1 through extrusion and female mark 13. First incomplete circular metallic aluminum antenna 5 links to each other with second incomplete circular metallic aluminum antenna 6 through two long straight line metallic aluminum antennas 9 in incomplete circular under the left and right sides, constitutes plane omega antenna structure. The second incomplete circular metal aluminum antenna 7 is connected with the third incomplete circular metal aluminum antenna 7 through two short straight line metal aluminum antennas 8 at the left side and the right side right above the incomplete circle to form a planar inverted omega antenna structure. The male label upper cover substrate 12 is connected with the male label lower cover substrate 1 through compounding to form a complete male label structure. The male mark upper cover substrate 12 is connected with the male mark lower cover substrate 1 through extrusion and the female mark 13 to form a complete marking structure.
The radio frequency identification chip in the invention can also adopt an R6-P model ultrahigh frequency RFID label chip of America Inteley Jack (Impinj), and the impedance of the radio frequency identification chip at the frequency point of 915MHz is 12-j119.6 omega. Corresponding to the chip, the circular inlay substrate 3 can be made of common PET materials, the relative dielectric constant of the circular inlay substrate is 3.2, and the loss tangent of the circular inlay substrate is 0.001; the upper cover 12 and the lower cover 1 of the ear tag male tag are made of TPU and the like, the relative dielectric constant of the TPU is 6.0, and the loss tangent of the TPU is 0.1. The upper cover 12 of the ear tag male tag can be arranged to have a diameter of 30mm and a thickness of 1 mm; the lower cover of the ear tag male tag can be provided with a diameter of 30mm and a thickness of 1.5 mm. The thickness of the antenna substrate PET material can be set to be 0.05mm, and the antenna is realized by an aluminum film material and can be adhered to the PET material. The thickness of the aluminum film antenna may be set to 0.01 mm. In order to match the frequency point of 915MHz of the RFID tag chip, the antenna structure can be adjusted according to the frequency point requirement, the diameter of the first incomplete circular metal aluminum antenna 5 can be set to be 26mm, the diameter of the second incomplete circular metal aluminum antenna 6 can be set to be 18mm, and after the structure is determined, the resistance value of the antenna can be correspondingly determined. At this time, in order to implement impedance matching with the chip, the present invention further needs to adjust the size of the third incomplete circular metal aluminum antenna 7, so as to change the reactance of the antenna and implement impedance matching with the chip. To the antenna structure of this embodiment, designer's accessible antenna simulation software sets up the diameter of third incomplete circular metallic aluminum antenna 7 to 10mm, and corresponding length with short straight line metallic aluminum antenna 8 sets up to 3.8mm, set up the length of long straight line metallic aluminum antenna 9 to 3.2mm, and set up short straight line metallic aluminum antenna 8 that impedance tuning connecting wire corresponds and the long straight line metallic aluminum antenna 9 that impedance tuning connecting wire corresponds all be on a parallel with the line direction between radio frequency identification chip 10 and the disc plane centre of a circle, thereby realize and the impedance match between the chip. The line width of all aluminum film structures in the antenna can be set to be 0.8 mm. Therefore, the antenna with the size and the chip with the type can obtain the lowest return loss of about-20 dB under the frequency band of 915Mhz, and can meet the requirement of practical application.
Therefore, the first incomplete circular metal aluminum antenna 5 and the second incomplete circular metal aluminum antenna 6 are connected through the long straight line metal aluminum antenna 9, the second incomplete circular metal aluminum antenna 6 and the third incomplete circular metal aluminum antenna 7 are connected through the short straight line metal aluminum antenna 8, and the chip 10 is fixed in the middle of the connecting part of the second incomplete circular metal aluminum antenna 6 and the short straight line metal aluminum antenna 8. Therefore, the resonance frequency point of the antenna can be changed by adjusting the radius and/or the length of the circular arcs of the first incomplete circular metal aluminum antenna 5 and the second incomplete circular metal aluminum antenna 6; then, the radius of the arc of the third incomplete round metallic aluminum antenna 7 is adjusted
Size and/or arc length, and the impedance of the antenna is adjusted to achieve impedance matching with the chip 10.
The above are merely embodiments of the present invention, which are described in detail and with particularity, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are within the scope of the present invention.
Claims (10)
1. An ultra-high frequency radio frequency identification tag antenna, comprising:
the resonance frequency point tuning structure comprises an outer layer arc structure, a middle layer arc structure arranged on the inner side of the outer layer arc structure and a frequency point tuning connecting line connected between the outer layer arc structure and the middle layer arc structure;
the impedance matching tuning structure comprises an inner layer arc structure arranged on the inner side of the middle layer arc structure and an impedance tuning connecting line connected between the inner layer arc structure and the middle layer arc structure;
the radio frequency identification chip (10) is arranged in the middle of the middle layer arc structure;
the resonance frequency point tuning structure, the impedance matching tuning structure and the radio frequency identification chip (10) are all arranged on the same disc plane, and the resonance frequency point tuning structure and the impedance matching tuning structure all use the diameter of the disc plane where the radio frequency identification chip (10) is located as a symmetry axis.
2. The uhf rfid tag antenna of claim 1, wherein the outer arcuate structure comprises:
a left first incomplete circular metal antenna arranged on the left side of the radio frequency identification chip (10);
a right first incomplete circular metal antenna disposed on the right side of the radio frequency identification chip (10);
tuning intervals are further arranged between the first incomplete round metal antenna on the left side and the first incomplete round metal antenna on the right side and on the upper side and the lower side of the radio frequency identification chip (10) respectively.
3. The uhf rfid tag antenna of claim 2, wherein the mid-layer arc structure comprises:
the right end of the left second incomplete circular metal antenna is electrically connected with the left side of the radio frequency identification chip (10);
the left end part of the right second incomplete circular metal antenna is electrically connected with the right side of the radio frequency identification chip (10);
a connecting port is formed between the left second incomplete circular metal antenna and the right second incomplete circular metal antenna on the lower side of the radio frequency identification chip (10);
and the frequency point tuning connecting line is downwards connected to the lower end of the left first incomplete circular metal antenna and the lower end of the right first incomplete circular metal antenna from the left end and the right end of the connecting port respectively.
4. The uhf rfid tag antenna of claim 2, wherein the inner arc structure is a third incomplete circular metal antenna with a tuning port on the upper side, which is located below the rfid chip (10);
the impedance tuning connecting line is upwards connected to the middle-layer arc structures on the left side and the right side of the radio frequency identification chip (10) from the left end and the right end of the tuning port respectively.
5. The uhf rfid tag antenna of claims 1-4, wherein a through hole (11) is further formed in the plane of the circular plate, and the through hole (11) is located at the inner center of the third incomplete circular metal antenna.
6. The uhf rfid tag antenna of claims 1-5, wherein the resonant frequency point tuning structure and the impedance matching tuning structure are aluminum film antenna patches attached to the upper surface of the disc plane.
7. The uhf rfid tag antenna of claims 1-6, wherein the impedance tuning connections and the impedance tuning connections are parallel to the diameter of the disc plane in which the rfid chip (10) is located.
8. The uhf rfid tag antenna of claim 5, wherein the upper sides of the disc plane, the resonant frequency point tuning structure, the impedance matching tuning structure, and the rfid chip (10) are closed by a male tag upper cover substrate (12), and the lower sides of the disc plane, the resonant frequency point tuning structure, the impedance matching tuning structure, and the rfid chip (10) are closed by a male tag lower cover substrate (1);
the male tag upper cover substrate (12) and the male tag lower cover substrate (1) are pressed and fixed, a through hole is further formed in the middle of the male tag upper cover substrate (12), and the through hole is located above a through hole (11) formed in the inner side of the third incomplete circular metal antenna and used for enabling an ear tag needle to enter.
9. A pig ear tag, comprising:
a male tag, one end of which is provided with the UHF RFID tag antenna as claimed in any of claims 1-8, and the other end of which is provided with an ear stud (2) protruding from the front side surface of the tag antenna;
female mark (13), be provided with the mounting hole that can supply ear nail (2) to pass in the middle of it, the rear end face of front side butt ear nail (2) of mounting hole, the pig ear is pressed close to the rear side of mounting hole.
10. The pig ear tag according to claim 9, characterized in that the male tag upper cover substrate (12) and the male tag lower cover substrate (1) in the male tag comprise but are not limited to TPU, ABS, PP, PE material, and the disc plane between the male tag upper cover substrate (12) and the male tag lower cover substrate (1) is PET material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724895.9A CN113972466A (en) | 2020-07-24 | 2020-07-24 | Ultrahigh frequency radio frequency identification tag antenna and pig ear tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724895.9A CN113972466A (en) | 2020-07-24 | 2020-07-24 | Ultrahigh frequency radio frequency identification tag antenna and pig ear tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113972466A true CN113972466A (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010724895.9A Pending CN113972466A (en) | 2020-07-24 | 2020-07-24 | Ultrahigh frequency radio frequency identification tag antenna and pig ear tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113972466A (en) |
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2020
- 2020-07-24 CN CN202010724895.9A patent/CN113972466A/en active Pending
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