Type of RFID antenna

1、 RFID antenna type

According to the difference between the shape of RFID antenna and RFID antenna, RFID antenna can be divided into two types: omnidirectional antenna and RFID antenna, which can also be divided into two types: omnidirectional antenna and RFID antenna.

RFID reader antenna needs to have the characteristics of broadband and circular polarization. In the low-frequency and high-frequency bands, the coil antenna is basically used for electronic tags and readers, and copper wire is generally used. However, due to the high frequency of high-frequency use, the number of turns of the antenna will be much less than that of low-frequency, which makes the production of high-frequency RFID antenna simpler and cheaper.

In UHF frequency band, etching process is widely used, including copper etching antenna and aluminum etching antenna, and the process is also relatively mature. In the microwave band, the forms of RFID antenna are more diversified, including symmetrical dipole antenna, microstrip antenna, array antenna, broadband antenna and so on. Different frequency bands and different application fields have different requirements for the structural form of RFID antenna.

2、 Objectives of RFID antenna design

1. The size of the antenna shall be as small as possible;

2. The antenna provides as large a signal as possible to the chip;

3. The directivity of RFID antenna coverage shall be as large as possible;

4. The polarization energy of the antenna matches the interrogation signal of the reader / writer;

5. The price of antenna shall be as low as possible, etc.

3、 Three main processes of RFID antenna manufacturing

In order to meet the different requirements of RFID performance parameters in different application scenarios, the manufacturing processes of various rfid antennas have emerged. At present, the most commonly used RFID antenna manufacturing processes mainly include coil winding method, etching method and printing method.