13.56 MHz Antennas

What are 13.56 MHz antennas?

A 13.56MHz antenna is an antenna specifically designed for use in the 13.56MHz frequency band, a band commonly used in radio frequency identification (RFID) systems and near-field communication (NFC).

A 13.56MHz antenna is a transducer that converts high-frequency current from a transmitter into electromagnetic waves in space for transmission, and at the same time converts electromagnetic waves intercepted from space into high-frequency current for delivery to a receiver. In RFID systems, this antenna is used to communicate with the RF card to read and write data.

 

13.56 MHz antenna working principle

The working principle of a 13.56 MHz antenna is based on electromagnetic induction. When the RFID reader transmits 13.56 MHz electromagnetic waves, the coil inside the RFID tag induces current from these waves, which activates the tag and exchanges data with it.

 

13.56 MHz antenna structure composition

The 13.56 MHz antenna is usually composed of the following two parts.

Transmitter circuit

Including the EMC filter circuit, resonance and impedance matching circuit, and coil. The EMC filter circuit is used to filter out the high harmonics higher than 13.56 MHz to ensure the purity of communication; the resonance and impedance matching circuit is used to adjust the resonance frequency and impedance of the antenna to optimize the signal transmission; the coil can be a PCB coil or a coil made of copper wire winding.

Receiver circuit

It consists of capacitors and resistors to stabilize the reference voltage of the card reader chip and introduce the received signals into the chip for data processing.

 

13.56 MHz antenna technology standard

In 13.56 MHz RFID systems, commonly used technical standards include ISO14443A and ISO14443B. These standards define different types of protocols and communication rates and usually utilize 423 KHz subcarrier technology.

 

13.56 MHz antenna applications

13.56 MHz antennas are widely used in a variety of proximity wireless communication scenarios, including various RFID systems and NFC applications.

Retail and logistics management

In retail stores, warehouses, and other places, 13.56 MHz antennas are used to read information on merchandise tags to realize inventory management and tracking.

Access control and security systems

In an access control system, a 13.56MHz antenna is used to recognize an employee’s ID card or access card to control the access authority.

Smartphone payment

In NFC smartphone payment, a 13.56MHz antenna is used to communicate with the payment terminal to realize a fast and secure payment function.

Medical equipment

In medical equipment, 13.56MHz antennas are used for data transmission of non-contact medical sensors to ensure data accuracy and security.

Second-generation ID card

13.56 MHz antenna is used to read the information inside the ID card.

etc.

 

What are the types of 13.56 MHz antennas?

13.56 MHz antennas can be categorized into various types according to their design, purpose, and shape, such as loop antennas, PCB antennas, flexible PCB antennas, etc.

 

Who manufactures 13.56 MHz antennas?

C&T RF Antennas Inc. manufactures indoor-outdoor 13.56 MHz antennas for your choice. Contact us for off-the-shelf 13.56 MHz antennas or design customizations.