The difference between passive electronic tags and active electronic tags

80% of the current market is passive electronic tags, and less than 20% is active electronic tags. Electronic tags can be divided into active electronic tags (Activetag) and passive electronic tags (Passivetag). Active electronic tags have a built-in battery, while passive radio frequency tags do not have a built-in battery. For active electronic tags, they can be subdivided into active electronic tags (Activetag) and semi-passive electronic tags (Semi-passive tag) according to the power supply of the battery inside the tag.

Working Principle

Active electronic tags are also called active tags. The working power of the tag is completely supplied by the internal battery. At the same time, the energy supply of the tag battery is also partially converted into electronic tags and reading The radio frequency energy required for device communication.

The battery power supply in the semi-passive RF tag only provides auxiliary support to the circuits in the tag that require power supply to maintain data or the voltage required for the tag chip to work. It supplies power to the tag circuits that consume very little power. Before the tag enters the working state, it has been in a dormant state, which is equivalent to a passive tag. The battery inside the tag consumes very little energy, so the battery can last for several years, or even up to 10 years; when the tag enters the reading area of ??the reader When it is stimulated by the radio frequency signal emitted by the reader and enters the working state, the energy support for information exchange between the tag and the reader is mainly the radio frequency energy supplied by the reader (reflection modulation method), and the role of the internal battery of the tag is mainly to compensate The radio frequency field strength at the location of the tag is insufficient, and the energy of the battery inside the tag is not converted into radio frequency energy.

Passive electronic tags (passive tags) do not have built-in batteries. When they are outside the reading range of the reader, the electronic tag is in a passive state. When it is within the reading range of the reader, the electronic tag The power required for its operation is extracted from the radio frequency energy emitted by the reader. Passive electronic tags generally use reflection modulation to transmit electronic tag information to the reader.

Features

1. Active tags are powered by batteries, have a longer read/write distance (about 100 meters to 1500 meters), and are larger in size than passive tags. The more expensive tags, also known as active tags, generally have a longer reading distance and require battery replacement when the energy is exhausted. For example: CY-RMZ-206, CY-RMZ-208, CY-RMZ-210

2. After receiving the microwave signal from the reader, the passive electronic tag converts part of the microwave energy into direct current. It works by itself, is generally maintenance-free, has low cost and has a long service life. It is smaller and lighter than active tags, and has a shorter reading and writing distance (about 1mm~30mm). It is also called passive. Label. For example: CY-RMZ-209

Compared with active systems, passive systems have slight limitations in reading distance and adapting to the speed of object movement.