What are the methods for making antennas for RFID tags?

For RFID tags, the antenna is a crucial part that is closely related to the system frequency band requirements.

At present, RFID tag antennas can be roughly classified into the following categories based on antenna wire materials, material structures, and manufacturing processes: aluminum etched antennas, silver paste printed antennas, copper wire coil antennas, ceramic antennas, etc. The most commonly used antenna manufacturing processes are the top four

Copper wire coil winding method

The manufacturing process of copper wire winding RFID tag antennas is usually completed using an automatic winding machine, which directly wraps insulated paint on the base carrier film and uses copper wire with low melting point baking paint as the substrate of the RFID tag antenna. Finally, the wire and substrate are mechanically fixed with adhesive, and a certain number of turns are wound according to different frequency requirements. Suitable for new retail, epidemic prevention material management, asset management, commodity retail, product management, home school entrance and exit channels, library management system applications, enterprise parks, vertical shaft construction sites, personnel attendance of civil explosive enterprises, anti-counterfeit applications of consumables, tool washing management applications, large conference personnel channel systems, fixed asset management systems, medical logistics system management and applications, intelligent shelf management, jewelry inventory management

Aluminum etching method

Aluminum etching method, also known as etching corrosion method, first covers a base carrier with a layer of copper or aluminum with a thickness of about 20mm. In addition, a screen printing plate with an antenna pattern is made, and the anti-corrosion agent is printed on the surface of the copper or aluminum by screen printing to protect the copper or aluminum below from corrosion, while the rest is melted by the corrosive agent. However, due to the use of chemical erosion reactions in the etching process, there are problems such as long process flow, excessive waste and wastewater, which can easily cause environmental pollution. Therefore, the industry has been striving to find better alternative methods. Suitable for new retail, epidemic prevention material management, asset management, commodity retail, product management, home school entrance and exit channels, library management system applications, enterprise parks, vertical shaft construction sites, personnel attendance of civil explosive enterprises, anti-counterfeit applications of consumables, tool washing management applications, large conference personnel channel systems, fixed asset management systems, medical logistics system management and applications, intelligent shelf management, jewelry inventory management

Silver paste printing method

Directly printing or printing the antenna circuit on the substrate with special conductive ink or silver paste is more mature, such as gravure printing or screen printing. Screen printing has saved costs to some extent, but its ink uses conductive silver paste with a high silver content of about 70% to obtain antennas between 15-20 μ m, which belongs to thick film printing method and has high cost. Suitable for new retail, epidemic prevention material management, asset management, commodity retail, product management, home school entrance and exit channels, library management system applications, enterprise parks, vertical shaft construction sites, personnel attendance of civil explosive enterprises, anti-counterfeit applications of consumables, tool washing management applications, large conference personnel channel systems, fixed asset management systems, medical logistics system management and applications, intelligent shelf management, jewelry inventory management

Ceramic antenna method

A high-temperature resistant label (-40 ℃~200 ℃) made by soldering a chip onto a silver plated antenna coil, and then encapsulating and protecting the soldered coil with epoxy resin on a ceramic substrate with high dielectric constant. Suitable for inspection of large outdoor power equipment, large iron towers and poles, large and medium-sized elevators, pallet management, large pressure vessels, liquefied gas cylinders, factory equipment management, line inspection, metal bridge quality inspection, tunnel inspection, machine identification, vehicle license plates, metal container management, product tracking of various power household equipment, etc