The rfid generally refers to the radio frequency identification. rfid electronic label (radio frequency label) price according to the type of label and application price from 1.5 yuan to 3 yuan. Generally speaking, high-end products using smart tags in more than 3 yuan.

The difference between active rfid and passive rfid

Firstly, the concept is different

1, active rfid, also known as active rfid, is defined by the electronic label power supply mode of the different categories of electronic labels, usually support long-distance identification. Electronic label can be divided into active electronic label, passive electronic label and semi-passive electronic label.
2, passive rfid, that is, passive radio frequency label using carrier wave work mode, has the anti-interference ability, the user can custom read and write standard data, in the special application platform efficiency is very convenient, read the distance up to 10 meters or more.

Secondly, the working principle is different

1, active electronic tag rfid is the tag work energy provided by the battery, battery, memory and antenna together constitute the active electronic tag rfid, different from the passive radio frequency activation method, before the battery replacement has been through the set frequency band outgoing information. In order to guarantee the recognition reliability and battery economy, the transmitting interval is generally 400 milliseconds ~800 milliseconds.
2, passive rfid tag performance by the tag size, modulation form, circuit Q value, device power consumption and modulation depth of the great impact. Passive rfid tag rfid 1024bits memory capacity, ultra-wide operating band, both in line with relevant industry regulations, but also flexible development applications, can read and write multiple tags at the same time. Passive RF tag design, no battery, memory can be repeatedly erased more than 100,000 times.

Third, the battery principle is different

1, active rfid tag by the built-in battery to provide energy, different tags use different amounts and shapes of batteries.

2, passive rfid tag does not contain battery, its electric energy from rfid reader to obtain. When the passive rfid tag is close to the rfid reader, the antenna of the passive rfid tag will convert the received electromagnetic wave energy into electric energy, activate the chip in the rfid tag and send out the data in the rfid chip.

Fourth, the price and life of different

1, passive rfid: the price is relatively cheap active rfid, and the life is relatively long (theoretical 10 years).
2, active rfid: high price, and the use of battery life is relatively short (1 year ~ 3 years).