UHF RFID Tag – The Fastest Growing Segment of the RFID Industry

UHF RFID Tag – The Fastest Growing Segment of the RFID Industry


UHF RFID Tag – The Fastest Growing Segment of the RFID Industry

UHF is the fastest growing segment of the RFID industry. It’s used in healthcare, retail, and supply chain management.

The tag’s antenna is tuned to perform better on specific materials. This can affect its RSSI (Return Signal Strength Indicator) and read range. Printed antennas using meander monopoles have been shown to achieve good performance.


UHF RFID Tags have a much greater read range than Low Frequency (LF) and High Frequency (HF) tags, opening up new possibilities for tracking assets. Tags can also be paired with sensors to monitor environmental factors such as temperature and humidity.

A key to maximizing the range of detection for these types of sensors is the design and fabrication of the antenna on the RFID tag itself. This is because RFID sensor tags have to be integrated with objects that typically have a wide variety of surface materials. Many of these surfaces may interfere with the transmission and reception of radio signals in different ways, which could limit or inhibit a tag’s read range.

To address this challenge, we have developed printed and flexible UHF-RFID tag antennas with different geometries. We have analyzed the performance of these printed antennas with respect to bending and other material properties. The results show that these printed antennas are functional when bent, and they retain their resonant frequencies up to a radius of 24 mm in two orthogonal directions.

Additionally, we have paired these printed UHF RFID Tag and flexible RFID tag antennas with a simple thermal-reflective sensor on the RFIC to demonstrate its ability to sense temperature changes. The sensor measurements aligned well with a wired reference thermocouple. The sensitivity of the RFID tag to temperature depends on the material in which it is embedded.


UHF RFID Tags have long read range capabilities, enabling organizations to track inventory and assets across multiple locations. They provide a massive data set that helps streamline supply chain processes, leading to increased decision-making and cost savings.

The RFIC and antenna pair are key to the performance of the UHF RFID Tag. They are tested by analyzing the Return Signal Strength Indicator (RSSI) and the read range. The RSSI value measures the power of the transmitted signal from the tag, while the read range indicates how far the RFIC can be read by an RFID interrogator antenna.

Asset tracking is a vital element in any supply chain, providing valuable information on condition and location of physical assets. This enables companies to optimize asset management by automating processes and eliminating human error.

When an item is scanned by an RFID reader, the system will register the tag and send the associated data to the host system. This provides a significant efficiency boost over manual methods, including using barcode scanners and a spreadsheet to manually track items as they move through the warehouse or distribution process.

Many UHF RFID tags have special features that make them more suited to particular environments or applications. These features can help businesses narrow down the type of tag that will work best for their UHF RFID Tag needs. For example, some UHF RFID tags have resistance to extreme temperatures, making them ideal for use in freezers and cold temperature environments. Others are designed to mount on metal surfaces, such as firearms or IT assets.

Inventory Management

UHF RFID tags provide the most powerful inventory management capabilities of any RFID technology. With their ability to read many tags simultaneously, they allow for rapid product identification and scanning, reducing labor costs and speeding up processes. Additionally, their broader range makes them ideal for use in warehouses and other large, open spaces.

The RFIC of a passive RFID tag contains an antenna and microchip that stores data, including a unique identifier. When an RFID reader transmits a signal, the tagged item responds with its stored information. The reader then captures the tagged data and transmits it to a host system.

Unlike barcode labels, which can be damaged when wet, passive RFID tags are resistant to water and other liquids. This allows them to be used on objects with long lifecycles such as clothing, tools and electronics.

Some specialized applications require RFID tags to be autoclavable, which involves sterilizing the item after use. These are typically used in healthcare and manufacturing, where regular RFID tags would not be able to withstand the heat. Fortunately, manufacturers produce autoclavable RFID tags that are designed to withstand this process.

Asset Management

Using RFID tags to track inventory can save valuable work time. If workers have to spend hours searching for equipment, they can’t perform their jobs as efficiently as possible. This can result in costly delays, missed deadlines and customer commitments. Additionally, these inefficiencies can lead to internal theft and supply chain disruptions.

RFID technology allows for bulk counting and a real-time view of inventory in seconds. DT Research rugged tablets that integrate UHF RFID readers enable businesses to easily and accurately manage inventory, eliminating the need for manual counts. This helps reduce cycle times for inventory and expedites the process of delivering products to customers. It also allows for reduced shrinkage in the retail industry and provides a more secure supply chain.

UHF RFID readers have a much higher operating frequency than traditional barcode scanners, and the signal can travel through obstacles such as metal, liquid or plastic. This is why they are often used in manufacturing, shipping and vehicle tracking applications.

To ensure maximum performance, the antenna design of the RFID tag is critical. Printed antennas on flexible substrates like those described in this work (red circles) have small D/(lambda), which allows them to achieve moderate gain. Typical dipole antennas, on the other hand, have large diameter relative to their operating wavelength, making them less suitable for integration on small packages.