How is the etching method for RFID antenna making?

1.Gravure etching RFID antenna process (all shaft-to-axis production) (1) Design the antenna pattern according to the product requirements, including the antenna length and width and line spacing, and select the thickness of aluminum foil. (2) Manufacturing.

RFID antennas are divided into two kinds, one is the antenna of the electronic copy tag, which has copper wire winding, aluminum etching, DU copper etching, PCB board and other technologies

Distinguish according to industrial grade: PCB board "copper wire winding" copper etching DAO> aluminum etching Industrial grade from high to low cost also from high to low.

The other is the reader antenna, which is divided into high frequency and ultra-high frequency, and the main circuit of high frequency is generally a PCB antenna or in some need to be customized on site or in the metal environment, you can use HATU to make the antenna yourself, so that the antenna is automatically adjusted to the frequency or adapt to the metal environment.

UHF antennas generally have PCB antennas, ceramic antennas, and aluminum plate antennas, which depend on the requirements of distance and polarization direction.

RFID tag antenna is the transponder antenna of RFID tag, which is a communication induction antenna. Generally, it is an RFID transponder composed of a chip. RFID tag antennas are divided into metal etched antennas, printed antennas, copper-plated antennas, etc. due to different materials and manufacturing processes.

Principles of RFID technology.

In general, the RFID application system is mainly composed of two parts: a reader and an RFID card, as shown in Figure 1. Among them, the reader is generally used as a computer terminal to realize the data reading, writing and storage of RFID card, which is composed of a control unit, a high-frequency communication module and an antenna. The RFID card is a passive transponder, mainly composed of an integrated circuit (IC) chip and its external antenna, in which the RFID chip is usually integrated with RF front-end, logic control, memory and other circuits, and some even integrate the antenna together on the same chip

Figure 1 Schematic diagram of the RFID system.

The basic working principle of the RFID application system is that after the RFID card enters the RF field of the reader, the induced current obtained by its antenna is used as the power supply of the chip through the boost circuit, and the induced current with information is sent to the logic control circuit through the RF front-end circuit to detect the digital signal and send it to the logic control circuit for information processing; The information to be replied to is then obtained from memory, sent back to the RF front-end circuit via the logic control circuit, and finally sent back to the reader via the antenna. It can be seen that the antenna plays a key role in the process of data communication between RFID cards and readers. On the one hand, in order for a passive RFID card chip to start the circuit work, it needs to obtain sufficient energy in the electromagnetic field generated by the reader antenna through the antenna; On the other hand, the antenna determines the communication channel and communication mode between the RFID card and the reader.

RFID system antennas.

It is generally divided into two categories: electronic tag DU antenna design and ZHI reader antenna.

The design of the Tianquan line of the RFID system in different working frequency bands has its own characteristics. For the LF and HF frequency bands, the system works in an inductive coupling mode, and the working energy required by the electronic tag is obtained by the coupling coil of the reader through the inductive coupling mode to radiate the near field, which is generally a passive system, and the working distance is small, not more than 1 meter. The near-field of the reader does not actually involve the problem of electromagnetic wave propagation, and the antenna design is relatively simple.

Aluminum-etched or copper-etched antennas, or printed copper antennas.

Aluminum-etched copper etched antennas.

Printed copper antennas.

There are aluminum etching, copper etching, silver paste printing;

It is composed of a layer of aluminum foil and a layer of insulator PET.

There are more domestic aluminum, and foreign materials such as copper and gold plating.

Radio frequency identification (RFID) technology, also known as electronic tags and radio frequency identification, is a communication technology that can identify specific targets through radio signals and read and write relevant data without the need to establish mechanical or optical contact between the identification system and the specific target.

RFID technology: It is a non-contact RF technology, and each RF product has a unique number.

RFID technology is divided into low frequency, high frequency, and ultra-high frequency according to frequency! Take a look at the protocol!

The main process of the application of the Internet of Things technology RFID to the product is as follows:

1. Passive RFID electronic tags are attached to the products, and a lot of information is written on the labels.

2. The tag information can be read out by the passive RFID electronic tag reader.

3. As long as there is a qualified passive RFID electronic tag reader, the tag information can be read.

4. For secondary development, integrators can purchase qualified passive RFID electronic tag readers to read out the label information, and then integrate the system.

RFID Antenna Types There are 3 basic types of antennas in RFID: coil type, microstrip patch type, and dipole type.

The antennas of RFID systems can be roughly divided into:Electronic tag antennawithReader antennaThere are two categories, and these two types of antennas can be subdivided according to directionalityOmnidirectional antennaswithDirectional antennasetc., according to the difference in appearance, it can also be divided intoLinear antennaswithSurface antennasWait.

RFID reader antennaWhat you need to haveBroadband, circularly polarizedcharacteristics. In the low-frequency and high-frequency bands, electronic tags and readers are basically usedCoil antennas, generally using copper wires

However, due to the high frequency used in high frequency, the number of turns wound by the antenna will be much less than that of low frequency, which makes the production of high-frequency RFID antennas simpler and lower.

In the ultra-high frequency band, there are many etching processes, including copper etched antennas and aluminum etched antennas, and the process is also relatively mature. In the microwave band, the forms of antennas are more diverse, including:Symmetrical oscillator antennas, microstrip antennas, array antennas, broadband antennasWait a minute. ——rfidQuan Shunhong fuwit

RFID electronic tags of printed antennas are generally not suitable for washing, and the direct binding of printed antennas and chips is more fragile and will be disconnected in the process of washing, and washed labels are generally made into button types of ABS packages, like UT9147, or encapsulated with silicone.