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At present, the working frequency of the global UHF RFID system is between 860-960mhz, which is because the RFID system will be applied all over the world. However, there is no common frequency applicable to the RFID system in the world, and the specific provisions on frequency are different all over the world. Therefore, the frequency problem is an important problem for RFID system. Frequency problems mainly include the range of working frequency, transmission power, frequency modulation technology, channel width and so on.

The frequency band is 869mhz, which allows short-distance use, such as post, conference, etc. Frequency bands 888-889 and 902-928 are widely used in RFID systems. In addition, their cordless telephone networks are divided into three regions (1 region in Europe and 2 regions in Africa) and the International Telecommunication Union (ITU), respectively.

Then, the UHF RFID products of oplid Technologies Co., Ltd. include high-performance integrated reader / writer head, multi-channel processor, reader / writer antenna, UHF module, handheld mobile terminal, RFID tag (high-performance universal type, special environment tolerance type, precision identification type, etc.), and its working frequency generally ranges from 860MHz to 928mhz, supporting regional standards such as China, North America and Europe, Comply with the wireless protocol EPC global class 1 Gen2 / iso-18000-6c (multi protocol compatibility).

The characteristics of UHF RFID card is as follows:

1. UHF RFID cards can transmit energy through the electric field. The energy of the electric field does not decline rapidly, but the reading area is not well defined. The reading distance of this frequency band is relatively far, and the passive can reach about 10m. Energy exchange and data transmission are mainly carried out through capacitive coupling,

2. UHF radio waves cannot pass through many materials, especially suspended particles such as water, dust and fog. Appropriate electronic labels should be selected for corresponding scenes, such as anti metal, special environment, anti-interference, high temperature resistance and other characteristics.

3. The antenna of electronic tag is generally in the shape of strip and tag. The antenna has two designs: linear and circular polarization to meet the corresponding application requirements.

4. This frequency band has a good reading distance, but it is difficult to define the reading area, which needs to be analyzed in practical application scenarios.

5. It has a high transmission rate and can read electronic labels in batches in a very short time.

UHF RFID card + smart channel door has the function of anti string reading. Opirfid Technologies Co., Ltd. independently innovates the industrial anti string reading algorithm technology. The anti string reading identification method based on RFID signal phase adopts deep neural network to carry out offline training and online identification of RFID phase, so as to realize the accurate classification of business tags and string reading tags, and solve the problem of string reading in the application process of UHF reader/writer; Automatic data collection, with independent and innovative industrial anti string reading algorithm technology, unmanned and automatic collection of multi tag information, long-distance and dynamic reading of passing articles, vehicles and personnel, support 5km / h high-speed operation, batch identification and reading of multiple tags, and use them with RFID cards.

The application fields of UHF RFID electronic cards mainly include: supply chain management and application, production line automation management and application, air parcel management and application, container management and application, railway parcel management and application, logistics management application, etc., as well as more solutions and application scenarios for logistics intelligence, equipment intelligence and manufacturing process intelligence.