RFID radio frequency antenna is the key link to the Internet of Things

As an important part of the RFID system, the RFID radio frequency antenna wirelessly connects tags and readers to realize data transmission and interaction. The relevant knowledge of RFID radio frequency antenna will be introduced in detail and its key role in realizing Internet of Things connection will be revealed.

1. Definition and types of RFID radio frequency antennas

The type classification in this article mainly discusses antennas in the RFID industry, which may be different from the frequency classification in other industries. RFID radio frequency antenna is a device used for wireless communication with RFID tags. Its working principle is based on radio frequency (Radio Frequency) technology. According to different frequencies and application scenarios, RFID radio frequency antennas can be divided into low frequency (LF), high frequency (HF), ultra-high frequency (UHF) and other types.

rfid radio frequency antenna

Low frequency (LF) radio frequency antenna: operating frequency is 125 kHz to 134 kHz, has short communication distance, and is suitable for close range reading and identification. High frequency (HF) radio frequency antenna: operating frequency is 13.56 MHz, suitable for medium-distance communication, with high data transmission rate and anti-interference ability. Ultra-high frequency (UHF) radio frequency antenna: operating frequency is 860 MHz to 960 MHz, has long communication distance, and is suitable for centralized reading and identification of a large number of tags.

In addition to frequency classification, RFID Antennas can also be classified according to their polarization methods and materials. Two common classification methods are circularly polarized antennas and linearly polarized antennas, as well as PCB plate antennas and ceramic antennas.

Circularly Polarized Antenna: Circularly polarized antenna is a type of antenna widely used in RFID systems. It sends and receives electromagnetic waves rotating in all directions, providing omnidirectional coverage. This kind of antenna is suitable for applications that require simultaneous identification of multiple tags, such as inventory management and logistics. Linearly Polarized Antenna: A linearly polarized antenna is a directional antenna. The electromagnetic waves it sends and receives are polarized in a specific plane, usually horizontally or vertically. The main features of linearly polarized antennas are their longer read range and more sensitive signal. This kind of antenna is suitable for applications that require long-distance reading, such as Access Control systems and vehicle traffic management.

rfid antenna

PCB Plate Antenna: PCB Plate Antenna is a common RFID antenna type that is made of conductive materials and manufactured through Printed Circuit Board (PCB) technology. This kind of antenna usually has a thin structure and is arranged on the circuit board of the RFID Reader or electronic device, providing easy integration and manufacturing cost advantages. It is commonly used in various application scenarios, such as smart cards, tags and handheld devices. Ceramic Antenna: Ceramic antennas are made of ceramic materials and have the advantages of high temperature resistance and dimensional stability. This kind of antenna usually has high performance and stability and is not sensitive to temperature and humidity changes. Ceramic antennas are widely used in industrial fields, such as automobile manufacturing, aerospace, and environmental monitoring, to meet harsh working conditions and long-term use requirements.

2. The role and function of RFID radio frequency antenna

Transmit radio frequency signals: The RFID radio frequency antenna sends radio frequency signals to the surroundings, activates nearby RFID tags, and collects their information to achieve rapid tag identification and data collection.

Establish communication with tags: RFID radio frequency antennas and RFID tags communicate through wireless radio frequency signals. The antenna emits electromagnetic waves that interact with the integrated circuit in the tag to realize data transmission and exchange.

Receive and decode signals: The RFID radio frequency antenna receives the signal sent by the tag and decodes it into readable data for subsequent processing and analysis.

Adjust the communication range and angle: The antenna structure and antenna array design of the RFID radio frequency antenna can affect the communication range and angle, thereby achieving precise positioning and identification in different application scenarios.

rfid retail antenna

3. Application scenarios of RFID radio frequency antennas

Logistics and supply chain management: RFID radio frequency antennas can be used in warehousing and logistics links to achieve fast and accurate goods entry, exit and inventory management.

Retail Industry and inventory management: RFID radio frequency antennas can be used in shopping malls, supermarkets and other retail links to achieve product tag reading and product inventory management.

Intelligent transportation and vehicle management: RFID radio frequency antennas can be used in vehicle traffic management, electronic toll collection, Library-self-service-borrowing-and-returning-machine-source-manufacturer-UHF-touch-screen-borrowing-and-returning-machine.html target='_blank'>self-service parking and other scenarios to improve traffic efficiency and convenience.

As a key link to the Internet of Things, RFID radio frequency antennas play an important role in realizing logistics, supply chain and intelligent Internet of Things.