Composition of UHF RFID electronic tag

Electronic tags can be divided into electronic tag chips and tag antennas. The antenna function is the electromagnetic wave emitted by the mobile phone reader into the space and the energy emitted by the chip is emitted in the form of electromagnetic waves.
The chip adjusts and decodes the signal received by the tag, and encodes and modulates the signal that the electronic tag needs to return.
The UHF electronic tag chip is the core part of the electronic tag, and its functions include tag information storage, tag receiving signal processing and tag transmitting signal processing.
The chip is divided into radio frequency, analog front end, digital control and storage unit according to function and structural characteristics.
In UHF electronic tags, the area of the tag mainly depends on the area of its antenna. Generally in the UHF frequency band, the most commonly used is the dipole antenna .
The dipole antenna is composed of straight wires of the same thickness and length at both ends arranged in a straight line. The signal is fed in from the two ends in the middle, and a certain current distribution is generated on the two arms of the dipole. The electromagnetic field is excited in the space around the antenna.
Dipole antennas can also be divided into half-wave dipole antennas, double-wire folded dipole antennas, three-wire folded even ring antennas and double dipole antennas.


Post time: Jul-30-2020