CN220155742U - Full-capacitance RFID antenna - Google Patents
Full-capacitance RFID antenna Download PDFInfo
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- CN220155742U CN220155742U CN202321525622.7U CN202321525622U CN220155742U CN 220155742 U CN220155742 U CN 220155742U CN 202321525622 U CN202321525622 U CN 202321525622U CN 220155742 U CN220155742 U CN 220155742U
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- 239000003990 capacitor Substances 0.000 claims description 54
- 238000003466 welding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a full-capacitance type RFID antenna, which comprises a long feeder line, an antenna circuit board and an antenna coil, wherein the antenna circuit board is connected with the antenna coil, an electric signal on the antenna circuit board is connected with a radio frequency input, the electric signal of the radio frequency input is connected with a first frequency match, the electric signal of the radio frequency input is connected with a second frequency match, an electric signal between the radio frequency input and the first frequency match and the electric signal between the radio frequency input and the second frequency match are connected with an impedance match, the electric signal of the first frequency match is connected with a first coil interface, the electric signal of the second frequency match is connected with a second coil interface, and the radio frequency input is provided with a radio frequency input interface. This full capacitance form RFID antenna, this full capacitance form RFID antenna through setting up impedance matching electric capacity, first frequency matching electric capacity, second frequency matching electric capacity, sets up the RFID antenna into full capacitance type antenna, can be perfect with thickness to do thinnest, has reduced the volume and the size of antenna.
Description
Technical Field
The utility model relates to the technical field of wireless communication, in particular to a full-capacitance type RFID antenna.
Background
Along with the progress of the times, the size of the traditional equipment is smaller and smaller as the performance is better, the RFID antenna on the market generally uses a single Kong Cihuan or double-hole magnetic ring, but cannot be controlled to be thinnest in thickness, the full-capacitance RFID antenna only needs to use a capacitor, the thickness can be perfectly made to be thinnest, and the feeder line length of the full-capacitance RFID antenna can reach 7 meters, so that the problem is solved.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the full-capacitance type RFID antenna which has the advantages that the full-capacitance type RFID antenna is thinner than the conventional RFID antenna and the feeder line is longer, the RFID antenna can be placed in a farther place, the length of the feeder line cannot be limited to be long, and the like, and the problems of insufficient field thickness and excessive distance between the antenna and equipment are solved.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a full-capacitance form RFID antenna, includes long feeder, antenna circuit board and antenna coil, be connected with antenna coil on the antenna circuit board, the last signal connection of antenna circuit board has radio frequency input, the radio frequency input signal connection has first frequency to match, the radio frequency input signal connection has second frequency to match, the signal connection has impedance matching between radio frequency input and first frequency to match and the second frequency to match, first frequency to match the signal connection has first coil interface, second frequency to match the signal connection has second coil interface, be provided with the radio frequency input interface on the radio frequency input, radio frequency input interface department is connected with the feeder, impedance to match the signal connection has impedance to match the electric capacity, first frequency to match the signal connection has first frequency to match the electric capacity, second frequency to match the signal connection has second frequency to match the electric capacity, antenna coil's both ends are connected with the coil interface respectively.
Further, the connection mode of the radio frequency input interface and the feeder line is welding.
Further, the connection mode of the antenna coil and the coil interface is welding.
Further, the first frequency matching capacitor and the second frequency matching capacitor are both high-voltage capacitors.
Further, the length of the feeder line is 7 meters.
Further, the first frequency matching capacitor and the second frequency matching capacitor are connected in series.
Further, the first coil interface and the second coil interface are respectively connected with one end of a wire.
(III) beneficial effects
Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:
1. this full capacitance form RFID antenna, through setting up impedance matching electric capacity, first frequency matching electric capacity, second frequency matching electric capacity, set up the RFID antenna as full capacitance type antenna, thickness is made thinnest that can be perfect, the volume and the size of antenna have been reduced, through setting up the feeder, the length of feeder is 7 meters, longer than the feeder of conventional RFID antenna, this device conventional RFID antenna is thinner and the feeder is longer, can make the RFID antenna place in the place that is farther, can not receive the restriction of feeder length, and adopt RFID identification technology, utilize radio frequency signal transmission characteristic, realize the automatic identification of treating the discernment article, this RFID antenna can keep the gain steady in the frequency band scope, so as to improve the reading effect of label information, through setting up high-voltage capacitor, the withstand voltage value of high-voltage capacitor is higher, can bear first frequency matching electric capacity, the higher pressure drop of second frequency matching electric capacity, through being established ties first frequency matching electric capacity and second frequency matching electric capacity, can divide the pressure drop.
2. By adopting the technologies of near field communication technology, LC resonant circuit and the like, the RFID antenna with only capacitance and PCB thickness is realized.
Drawings
FIG. 1 is a partial three-dimensional schematic of the present utility model;
FIG. 2 is a system block diagram of the present utility model;
FIG. 3 is a block diagram of one embodiment of the present utility model;
fig. 4 is a schematic diagram of the present utility model.
In the figure: 1 radio frequency input, 2 impedance matching, 3 first frequency matching, 4 second frequency matching, 5 first coil interface, 6 second coil interface, 7 feeder, 8 antenna circuit board, 9 antenna coil, 10 radio frequency input interface, 11 impedance matching capacitor, 12 first frequency matching capacitor, 13 second frequency matching capacitor, 14 coil interface.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, a full-capacitance RFID antenna in this embodiment includes a long feeder 7, an antenna circuit board 8 and an antenna coil 9, the antenna coil 9 is connected to the antenna circuit board 8, an electrical signal on the antenna circuit board 8 is connected to a radio frequency input 1, the electrical signal on the radio frequency input 1 is connected to a first frequency matching capacitor 3, the electrical signal on the radio frequency input 1 is connected to a second frequency matching capacitor 4, an electrical signal between the radio frequency input 1 and the first frequency matching capacitor 3 and the second frequency matching capacitor 4 is connected to an impedance matching 2, the electrical signal on the first frequency matching capacitor 3 is connected to a first coil interface 5, the electrical signal on the second frequency matching 4 is connected to a second coil interface 6, a radio frequency input interface 10 is provided on the radio frequency input 1, the feeder 7 is connected to the electrical signal on the radio frequency input interface 10, the impedance matching 2 is connected to an impedance matching capacitor 11, the electrical signal on the first frequency matching 3 is connected to a first frequency matching capacitor 12, the electrical signal on the second frequency matching 4 is connected to a second frequency matching capacitor 13, and two ends of the antenna coil 9 are respectively connected to a coil interface 14.
The connection mode of the radio frequency input interface 10 and the feeder 7 is welding, the connection mode of the antenna coil 9 and the coil interface 14 is welding, the radio frequency welding has excellent sealing performance, is more reliable and stable than an adhesion method, and has the advantages of high process efficiency, stable welding quality, 7 m of feeder 7, thinner conventional RFID antennas and longer feeder, and can be placed in a place farther without being limited by the length of the feeder.
The first frequency matching capacitor 12 and the second frequency matching capacitor 13 are high-voltage capacitors, the first frequency matching capacitor 12 and the second frequency matching capacitor 13 are connected in series, the high-voltage capacitor is a capacitor with a withstand voltage value as high as 1KV, a series compensation station can be formed by using the high-voltage capacitor, the conveying capacity of a power transmission line is improved, and the voltage drop on the first frequency matching capacitor 12 and the second frequency matching capacitor 13 is higher, so that three series connection are used for voltage division.
The first coil interface 5 and the second coil interface 6 are respectively connected with one end of a wire, the impedance matching capacitor 11, the first frequency matching capacitor 12 and the second frequency matching capacitor 13 are adjusted to enable the RFID antenna parameter to be 13.56MHz@50Ω, the coil inside the RFID electronic tag obtains energy from the 13.56MHz magnetic field induction emitted by the RFID radio frequency RFID reader, the energy is supplied to the RFID electronic tag chip after rectification and filtering, and the RFID reader is always in the high frequency signal of 13.56MHz, and the RFID electronic tag chip is basically a non-wear point.
Working principle: according to the full-capacitance type RFID antenna, one end of a wire is connected with the first coil interface 5 and the second coil interface 6 respectively, so that the wire and the first coil interface 5 and the second coil interface 6 are combined into an LC series circuit, the two ends of an antenna coil 9 are welded by the coil interface 14 respectively, then the impedance matching capacitor 11, the first frequency matching capacitor 12 and the second frequency matching capacitor 13 are adjusted, the RFID antenna parameter is 13.56MHz@50Ω, the RFID antenna works through a wireless electromagnetic wave scattering technology, firstly, electromagnetic waves are emitted to an RFID tag, chip information on the RFID tag can be read through the electromagnetic waves, then the tag answers, and identification information is returned to the RFID antenna, and the tag can be identified after the antenna receives the answer.
In summary, 1. This full capacitance form RFID antenna, through setting up 11 impedance matching electric capacity, 12 first frequency matching electric capacity, 13 second frequency matching electric capacity, set up the RFID antenna as full capacitance type antenna, can be perfect with thickness to be thinnest, reduce the volume and the size of antenna, through setting up feeder 7, the length of feeder 7 is 7 meters, longer than conventional RFID antenna feeder, this device conventional RFID antenna is thinner and the feeder is longer, can make the RFID antenna place in the place that is farther, can not receive the restriction of feeder length, and adopt RFID identification technology, utilize radio frequency signal transmission characteristic, realize the automatic identification of article to be identified, this RFID antenna can keep the gain steady in the frequency band scope, in order to improve the reading effect of label information, through setting up high-voltage capacitor, high-voltage withstand value of high-voltage capacitor is higher, can bear the higher pressure drop of first frequency matching electric capacity 12, second frequency matching electric capacity 13, through connecting first frequency matching electric capacity 12 and second frequency matching electric capacity 13 in series, can divide the pressure drop.
2. By adopting the technologies of near field communication technology, LC resonant circuit and the like, the RFID antenna with only capacitance and PCB thickness is realized, and the problems of insufficient field thickness and too far distance between the antenna and equipment are solved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a full-capacitance form RFID antenna, includes long feeder (7), antenna circuit board (8) and antenna coil (9), its characterized in that: the antenna circuit board (8) is connected with an antenna coil (9), the antenna circuit board (8) is connected with a radio frequency input (1) through an electric signal, the radio frequency input (1) is connected with a first frequency matching capacitor (3), the radio frequency input (1) is connected with a second frequency matching capacitor (4), the electric signal between the radio frequency input (1) and the first frequency matching capacitor (3) and the second frequency matching capacitor (4) is connected with an impedance matching capacitor (2), the first frequency matching capacitor (3) is connected with a first coil interface (5) through an electric signal, the second frequency matching capacitor (4) is connected with a second coil interface (6) through an electric signal, the radio frequency input interface (10) is arranged on the radio frequency input (1), the radio frequency input interface (10) is connected with a feeder line (7), the impedance matching capacitor (11) is connected through an electric signal, the first frequency matching capacitor (3) is connected with a first frequency matching capacitor (12), the second frequency matching capacitor (4) is connected with a second frequency matching capacitor (13) through an electric signal, and two ends of the antenna coil (9) are connected with coil interfaces (14) respectively.
2. A full capacitance form RFID antenna as claimed in claim 1, wherein: the radio frequency input interface (10) and the feeder line (7) are connected in a welding mode.
3. A full capacitance form RFID antenna as claimed in claim 1, wherein: the antenna coil (9) and the coil interface (14) are connected in a welding mode.
4. A full capacitance form RFID antenna as claimed in claim 1, wherein: the first frequency matching capacitor (12) and the second frequency matching capacitor (13) are both high-voltage capacitors.
5. A full capacitance form RFID antenna as claimed in claim 1, wherein: the length of the feeder line (7) is 7 meters.
6. A full capacitance form RFID antenna as claimed in claim 1, wherein: the first frequency matching capacitor (12) and the second frequency matching capacitor (13) are connected in series.
7. A full capacitance form RFID antenna as claimed in claim 1, wherein: the first coil interface (5) and the second coil interface (6) are respectively connected with one end of a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321525622.7U CN220155742U (en) | 2023-06-15 | 2023-06-15 | Full-capacitance RFID antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321525622.7U CN220155742U (en) | 2023-06-15 | 2023-06-15 | Full-capacitance RFID antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220155742U true CN220155742U (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321525622.7U Active CN220155742U (en) | 2023-06-15 | 2023-06-15 | Full-capacitance RFID antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220155742U (en) |
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2023
- 2023-06-15 CN CN202321525622.7U patent/CN220155742U/en active Active
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