CN203150692U - Large power radio frequency antenna accords with ISO14443TYPEB - Google Patents
Large power radio frequency antenna accords with ISO14443TYPEB Download PDFInfo
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- CN203150692U CN203150692U CN 201220660471 CN201220660471U CN203150692U CN 203150692 U CN203150692 U CN 203150692U CN 201220660471 CN201220660471 CN 201220660471 CN 201220660471 U CN201220660471 U CN 201220660471U CN 203150692 U CN203150692 U CN 203150692U
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Abstract
The utility model provides a large power radio frequency antenna accords with an ISO14443TYPEB protocol, the large power radio frequency antenna comprises the following components: several rectangular coupling coils used for radiating radio-frequency power and receiving return signal power; an antenna matching and resonance circuit used for coupling with multiple coils of a coupling coil to form the resonance circuit; a radio frequency cable used for transmitting signals, wherein the radio frequency cable makes a change on the antenna impedance to form the coupling with impedance with a radio frequency card reader. The large power radio frequency antenna has the advantages that conversion of radio frequency cable and antenna impedance is used for realizing optimum impedance matching with the radio frequency card reader, the output of a high-power radio frequency signal can be realized, the card reading distance of the card reader is enlarged, and the antenna can bear maximum radio-frequency power with 8W.
Description
Technical field
The utility model relates to wireless communication technology field, relates in particular to a kind of high-power RF antenna of the ISO14443TYPE of meeting B agreement.
Background technology
Radio-frequency card is the product that REID and ID card technique organically combine.It has solved and has passively contacted this difficult problem with exempting from, and has convenient, characteristics efficiently, is widely used in E-Payment, passage control, public transport charge, Car park payment, dining room and sells multiple occasions such as meal, work attendance and gate inhibition.
Radio-frequency card and bar code card, magnetic card, non-contact ID card relatively have high security, high reliability, convenient to use.This mainly is to be determined by its technical characterstic, and the standard of mainly following in the low coverage coupling is used is ISO/IEC14443.Send and receive mode different according to signal, defined two kinds of card types of Type A, Type B among the ISO/IEC14443.Type category-A communication standard is a kind of standard of extensively using at present, it is the MIFARE standard, adopt 100%ASK modulation, synchronous sequence and Miller (Miller) coded system through revising, what use is the discontinuous modulation system, and namely when expression information " 1 ", representing has signal to card, when expression information " 0 ", do not have signal to card, this is quite short at interval certainly, can not have influence on operate as normal.The advantage of this mode is that the information difference is obvious, and the chance that is interfered is few, is not easy misoperation, and shortcoming is to need the constant energizing quantity of energy to it's time to card to have energy hunting.Type category-B communication standard is then to adopt 10%ASK modulation, asynchronous sequential and non-return-to-zero (NRZ) coded system, used a kind of modulation system of amplitude modulation, the difference of information " 1 " and " 0 " is the power that is signal, this point is subjected to external interference easily, can adopt redundancy check to solve.Its advantage is continual signal transmission, the situation of energy hunting can not occur.Two kinds of technology are difficult to distinguish quality more as can be seen by top, also are that the ISO tissue has been determined one of reason of two kinds of standards.
Though the technical not significantly difference at application, but in the application aspect, the Type category-A has than the more manufacturer of Type category-B to be supported, the marketing aspect public transport of Type category-A is more successful than Type category-B, be the mainstream applications technology on the market, its follow-up support is better.On price, owing to the popularity of Type category-A and the low side design of chip itself, make the Type category-A that bigger advantage be arranged.
In addition, the radio-frequency antenna that meets the ISO/IEC14443TYPEB agreement in the market all is the small-power antenna, power is usually at 0.1W～0.2W, the Card Reader distance of corresponding read write line is all less than 10cm, existing read write line can't be applied directly to the application scenario that needs remote Card Reader, therefore limit the range of application of this type of read write line.
The utility model content
The utility model is at existing weak point that a kind of high-power RF antenna of the ISO14443TYPE of meeting B agreement is provided in the prior art, to have solved the application problem of high-power RF output under the 13.56MHz frequency range, this antenna can bear the radio-frequency power that is 8W to the maximum.
To achieve these goals, the utility model provides a kind of high-power RF antenna of the ISO14443TYPEB of meeting agreement, and described high-power RF antenna comprises following building block:
Several rectangle coupling coils are used for radiated radio frequency (RF) power and accept inverse signal power.
Antenna match and resonant circuit are used for being complementary with the multi-turn coupling coil and forming tuning circuit.
The radio frequency cable is used for transmitting signal, and the radio frequency cable carries out conversion to form and the radio-frequency card reader impedance matching to described antenna impedance.
Described several rectangle coupling coils are being parallel to antenna match and resonant circuit junction.
In the preferred embodiment that the utility model provides, comprise two rectangle coupling coils in the wherein said high-power RF antenna, described two rectangle coupling coils are connected in parallel on the junction with antenna-matching circuit.
In the preferred embodiment that the utility model provides, the shape of wherein said two rectangle coupling coils is respectively 31cm * 45cm and 28cm * 42cm.
In the preferred embodiment that the utility model provides, comprise three rectangle coupling coils in the wherein said high-power RF antenna, described three rectangle coupling coils are connected in parallel on the junction with antenna-matching circuit.
In the preferred embodiment that the utility model provides, the shape of wherein said three rectangle coupling coils is respectively 29cm * 43cm, 30cm * 44cm and 31cm * 45cm.
In the preferred embodiment that the utility model provides, wherein said rectangle coupling coil adopts the multiply copper cash as base material, and the diameter of multiply copper cash can adopt specifications such as 1.25cm, 0.5cm, 0.75cm.
In the preferred embodiment that the utility model provides, wherein said antenna match and resonant circuit are condenser network.
In the preferred embodiment that the utility model provides, wherein said antenna resonant frequency is set in 13.56MHz.
Compared with prior art, the high-power RF antenna that the utility model provides has the following advantages: utilize the conversion of radio frequency cable and antenna impedance, realization is mated with the optimum impedance that frequency read/write carries out, realize output high-power RF signal, increase the Card Reader distance of read write line, this antenna can bear the radio-frequency power that is 8W to the maximum.
Description of drawings
Fig. 1 is the structure chart of first embodiment of the present utility model.
Fig. 2 is the structure chart of second embodiment of the present utility model.
Embodiment
The high-power RF antenna that meets ISO14443TYPE B agreement that the utility model provides utilizes the conversion of radio frequency cable and antenna impedance, realization is mated with the optimum impedance that rfid interrogator carries out, realize output high-power RF signal, increase the Card Reader distance of read write line.
The high-power RF antenna that meets the ISO14443TYPEB agreement that the utility model provides by the following examples is described in further detail, in order to the content of the invention better is described, but the content of embodiment does not limit the protection range of the invention.
Embodiment 1
As shown in Figure 1, radio-frequency antenna is made up of with resonant circuit (3), radio frequency cable (4) four parts the first rectangle coupling coil (1), the second rectangle coupling coil (2), antenna match.The first rectangle coupling coil (1), the second rectangle coupling coil (2) are the agent structures of antenna, equally also be radiated radio frequency (RF) power and the parts that receive inverse signal power, the first rectangle coupling coil (1) is of a size of the rectangle frame structure of 31cm * 45cm, and the second rectangle coupling coil (2) is of a size of the rectangle frame structure of 28cm * 42cm.The first rectangle coupling coil (1), the second rectangle coupling coil (2) all adopt the multiply copper cash of 1.25cm diameter as base material.
The first rectangle coupling coil (1), the second rectangle coupling coil (2) are tuning coils, the first rectangle coupling coil (1), coupling second square coil (2) are being parallel to antenna match and resonant circuit (3) junction, can regard the first rectangle coupling coil (1), the second rectangle coupling coil (2) as a whole coupling coil.Antenna match and resonant circuit (3) are condenser network, mate with tuning coil, and the first rectangle coupling coil (1), the second rectangle coupling coil (2) form tuning circuit with antenna match and resonant circuit (3).When antenna resonant frequency is adjusted to 13.56MHz, the return loss of antenna is-5.5dB.Be that 3 meters radio frequency cables (4) of 0.5cm carry out conversion to antenna impedance by diameter, to realize carrying out the optimum impedance coupling with frequency read/write.
Embodiment 2
As shown in Figure 2, radio-frequency antenna is made up of the 3rd coupling coil (5), the 4th coupling coil (6), the 5th coupling coil (7), antenna match and resonant circuit (3) and radio frequency cable (4) five parts.The 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) are the agent structures of antenna, also are radiated radio frequency (RF) power and the parts that receive inverse signal power.The 3rd coupling coil (5) is of a size of the rectangle frame structure of 29cm * 43cm, and the 4th coupling coil (6) is of a size of the rectangle frame structure of 30cm * 44cm, and the 5th coupling coil (7) is of a size of the rectangle frame structure of 31cm * 45cm.The 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) all adopt the multiply copper cash of 0.5cm diameter as base material.
The 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) are tuning coils, the 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) are being parallel to antenna match and resonant circuit (3) junction, can regard the 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) as a whole coupling coil.Antenna match and resonant circuit (3) are condenser network, mate with tuning coil, and the 3rd coupling coil (5), the 4th coupling coil (6) and the 5th coupling coil (7) form tuning circuit with antenna match and resonant circuit (3).When antenna resonant frequency is adjusted to 13.56MHz, the return loss of antenna is-5.5dB.Be that 3 meters radio frequency cables (4) of 0.5cm carry out conversion to antenna impedance by diameter, to realize carrying out the optimum impedance coupling with frequency read/write.
Because present embodiment adopts the three-winding pattern, so the radio-frequency antenna structure that present embodiment provides is better than the antenna structure that embodiment 1 provides.
More than specific embodiment of the utility model is described in detail, but it is as example, the utility model is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and substituting also all among category of the present utility model.Therefore, not breaking away from impartial conversion and the modification of doing under the spirit and scope of the present utility model, all should be encompassed in the scope of the present utility model.
Claims (8)
1. a high-power RF antenna that meets the ISO14443TYPEB agreement is characterized in that, described high-power RF antenna comprises following building block:
Several rectangle coupling coils are used for radiated radio frequency (RF) power and accept inverse signal power;
Antenna match with and resonant circuit, be used for and the multi-turn coupling coil is complementary and forms tuning circuit;
The radio frequency cable is used for transmitting signal, and the radio frequency cable carries out conversion to form and the radio-frequency card reader impedance matching to described antenna impedance;
Described several rectangle coupling coils are being parallel to antenna match and resonant circuit junction.
2. according to the described high-power RF antenna of claim 1, it is characterized in that comprise two rectangle coupling coils in the described high-power RF antenna, described two rectangle coupling coils are connected in parallel on the junction with antenna-matching circuit.
3. according to the described high-power RF antenna of claim 2, it is characterized in that the shape of described two rectangle coupling coils is respectively 31cm * 45cm and 28cm * 42cm.
4. according to the described high-power RF antenna of claim 1, it is characterized in that comprise three rectangle coupling coils in the described high-power RF antenna, described two rectangle coupling coils are connected in parallel on the junction with antenna-matching circuit.
5. according to the described high-power RF antenna of claim 4, it is characterized in that the shape of described three rectangle coupling coils is respectively 29cm * 43cm, 30cm * 44cm and 31cm * 45cm.
6. according to the described high-power RF antenna of claim 1, it is characterized in that described rectangle coupling coil adopts the multiply copper cash as base material.
7. according to the described high-power RF antenna of claim 1, it is characterized in that described antenna match and resonant circuit are condenser network.
8. according to the described high-power RF antenna of claim 1, it is characterized in that described antenna resonant frequency is set in 13.56MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660471 CN203150692U (en) | 2012-12-05 | 2012-12-05 | Large power radio frequency antenna accords with ISO14443TYPEB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660471 CN203150692U (en) | 2012-12-05 | 2012-12-05 | Large power radio frequency antenna accords with ISO14443TYPEB |
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| Publication Number | Publication Date |
|---|---|
| CN203150692U true CN203150692U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220660471 Expired - Lifetime CN203150692U (en) | 2012-12-05 | 2012-12-05 | Large power radio frequency antenna accords with ISO14443TYPEB |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050499A (en) * | 2014-06-24 | 2014-09-17 | 中国科学院微电子研究所 | High-frequency radio frequency identification label |
| CN106125025A (en) * | 2016-06-13 | 2016-11-16 | 公安部第研究所 | Energy test analog card resonant frequency calibrating installation |
-
2012
- 2012-12-05 CN CN 201220660471 patent/CN203150692U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050499A (en) * | 2014-06-24 | 2014-09-17 | 中国科学院微电子研究所 | High-frequency radio frequency identification label |
| CN104050499B (en) * | 2014-06-24 | 2017-02-08 | 中国科学院微电子研究所 | High-frequency radio frequency identification label |
| CN106125025A (en) * | 2016-06-13 | 2016-11-16 | 公安部第研究所 | Energy test analog card resonant frequency calibrating installation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |