CN214623697U

CN214623697U - High-frequency RFID (radio frequency identification) dual-channel reader-writer

Info

Publication number: CN214623697U
Application number: CN202120441644.XU
Authority: CN
Inventors: 钟石云; 俞海滨
Original assignee: Hangzhou Shengjia Intelligent Technology Co ltd
Current assignee: Hangzhou Shengjia Intelligent Technology Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-11-05
Anticipated expiration: 2031-03-01

Abstract

The utility model relates to a high frequency RFID binary channels read write line, including RFID module, carrier generator, be used for with appropriate and possibly changeable power level generate RF power the power amplifier, be used for guaranteeing the impedance match of the biggest whole power transmission, be used for extracting the subcarrier signal of load modulation and with its detection and the filter assembly of carrier wave and other noise separation; the RFID antenna is arranged between the impedance matching, detecting and filtering assembly, and a signal sent by the RFID module is transmitted to the carrier generator after being modulated; the RFID module is also separately connected with a security access module, the power amplifier (33) being used to generate RF power at a suitable and possibly variable power level.

Description

High-frequency RFID (radio frequency identification) dual-channel reader-writer

Technical Field

The utility model relates to an indoor location technique especially relates to high frequency RFID binary channels read write line.

Background

In some cases, it is necessary that the RFID reader can handle multiple protocols. For example iso14443 and iso 15693. iso15693 is a neighborhood based RFID standard for longer range, lower data rate neighborhood transactions. Therefore, it is necessary to set the antenna q to a higher level to achieve higher resonance and longer tag interaction distance. On the other hand, iso14443 is an RFID protocol with higher data rate and shorter reading distance for electronic passports, payment cards and the like. These are contactless cards, which operate in a so-called proximity mode. This has the advantage that eavesdropping by third parties is prevented. The lower antenna q associated with iso14443 also ensures a higher data rate than iso15693, which is more suitable for electronic passport and payment applications. A key aspect of electronic passports and payments is the need to ensure secure communication, which can be achieved through multi-channel authentication and various forms of encryption. When the self-service terminal in the market needs to process the two protocols at the same time, two different readers-writers are needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present invention provides a high frequency RFID dual channel reader/writer which is compatible with iso14443 and iso15693 and ensures the reading/writing capability of the stock and the payment security in the same reader/writer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the high-frequency RFID dual-channel reader-writer comprises an RFID module, a carrier generator, a power amplifier, a detection and filtering component and a detection and filtering component, wherein the detection and filtering component is used for ensuring impedance matching of maximum overall power transmission and extracting load-modulated subcarrier signals and separating the load-modulated subcarrier signals from carrier waves and other noises; the RFID antenna is arranged between the impedance matching, detecting and filtering assembly, and a signal sent by the RFID module is transmitted to the carrier generator after being modulated; the RFID module is also separately connected with a security access module, the power amplifier being used to generate RF power at a suitable and possibly variable power level.

Preferably, the RFID module integrates a microprocessor and an RFID chip.

Compared with the prior art, the beneficial effects of the utility model are that: the reader-writer can simultaneously process ISO15693 and ISO14443 protocols, and has a double radio frequency end and can bear 2 antennas.

Drawings

FIG. 1 is a high frequency RFID dual channel reader.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the drawings.

Example 1:

the high frequency RFID dual channel reader shown in fig. 1 is the system. The high-frequency RFID dual-channel reader-writer comprises an RFID module 31, a carrier generator 32, a power amplifier 33, an impedance matching 34 and a detection and filtering component 35. The RFID module 31 integrates a microprocessor and an RFID chip. The RFID module 31 is responsible for generating forward link modulation signals and receiving RFID tag load modulation signals. The power amplifier 33 is used to generate RF power at a suitable and possibly variable power level. Impedance matching 34 is used to ensure maximum overall power transfer. The detection and filtering component 35 is used to extract the load modulated subcarrier signal and separate it from the carrier and other noise. The carrier generator 32 is connected with an external power supply, the carrier generator 32 is sequentially connected with the power amplifier 33, the impedance matching 34, the detection and filtering component 35 and the RFID module 31, the RFID antenna 36 is arranged between the impedance matching 34 and the detection and filtering component 35, and signals sent by the RFID module 31 are transmitted to the power amplifier 33 after being modulated.

In FIG. 1, 3 external ports are shown, including an external power port 37, a USB connection port 38, and an RFID antenna 36. In some cases, the USB connection port 38 may be replaced with another form of external connection (e.g., Ethernet).

In some cases, it is necessary that the ZigBee coordinator can handle multiple protocols. For example: ISO14443 and ISO 15693. ISO15693 is a neighborhood-based RFID standard for longer range, lower data rate neighborhood transactions. Therefore, it is desirable to set RFID antenna 36 to a higher level to achieve higher resonance and longer tag interaction distance. On the other hand, ISO14443 applies an RFID protocol with higher data rate and shorter read distance. Compared with ISO15693, ISO14443 has better safety performance. The ISO15693 credentials may communicate using ISO14443 associated lower RFID antennas 36. Both standards use a common carrier frequency: 13.56 mhz. A disadvantage of this approach is that the read range of the RFID solution of the ISO15693 protocol will be shortened compared to other approaches. However a multi-protocol ZigBee coordinator capable of handling both protocols may be made possible. To achieve this, a security access module 30 needs to be added to the hierarchy. This module is able to handle the encryption keys and algorithms associated with the security features typically included in the RFID technology of the ISO14443 protocol.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. High frequency RFID binary channels read write line, its characterized in that: comprising an RFID module (31), a carrier generator (32), a power amplifier (33), an impedance match (34) to ensure maximum overall power transfer, a detection and filtering component (35) for extracting and separating load modulated subcarrier signals from carrier and other noise; the carrier wave generator (32) is connected with an external power supply, the carrier wave generator (32) is sequentially connected with the power amplifier (33), the impedance matching (34), the detection and filtering component (35) and the RFID module (31), an RFID antenna (36) is arranged between the impedance matching (34) and the detection and filtering component (35), and signals sent by the RFID module (31) are transmitted to the power amplifier (33) after being modulated; the RFID module (31) is also connected with a security access module (30) independently; the power amplifier (33) is used to generate RF power at a suitable and possibly variable power level.

2. The high-frequency RFID dual-channel reader-writer according to claim 1, characterized in that: the RFID module (31) integrates a microprocessor and an RFID chip.