UHF RFID Reader
Ultra-high frequency RFID (Radio Frequency Identification Technology) readers use radio-frequency waves to wirelessly transfer data between an RFID reader and an RFID tag or label. This allows businesses to identify, categorize and track assets faster and more accurately.
GB/T 29768-2013 and GB/T 35786-2017 standards relating to the electronic identification of motor vehicles have stringent RF performance requirements. This article presents a high-performance UHF RFID reader RF front end solution based on Analog Devices products.
Read Range
A UHF RFID Reader is a radio frequency identification device that operates in the Ultra-High Frequency (UHF) range of 840 MHz to 960 MHz. They are used to communicate with and identify objects or items using the EPC Gen 2 protocol. UHF readers are more advanced than LF or HF RFID readers and offer increased read range.
Various factors can impact the read range of a UHF RFID tag. Tag size, materials and placement are key components to consider when evaluating the performance of a specific tag. Tags designed for use on metal or in water may perform differently than tags designed for wood, for example.
The orientation of the tag with respect to the antenna on the reader also impacts read range. Orientation sensitive tags require the reader and tag antennas to be in the same orientation for best results.
Environmental factors such as water, metal, florescent lighting and competing frequencies (other radio waves) can affect read ranges. It is important to test your system in the environment where it will be used to determine what types of interference are affecting read range and then make adjustments and retest. This testing will help ensure the UHF RFID Reader can reliably detect the tags that it is designed to identify. Achieving a consistent and optimal read range is an essential step to successfully managing high-value inventory.
Anti-Collision
RFID tags use radio waves to communicate with the reader. These tags can be located in a wide range of locations and do not need line-of-sight like barcodes or magnetic stripes. The read range can vary from inches to over 120 feet depending on the tag and reader. This technology is RFID Wristband used in a variety of applications including inventory management, asset tracking, supply chain logistics and retail.
One challenge of RFID is the possibility of collisions between readers and tags. These can occur when multiple readers are trying to identify a single tag. The solution to this problem is anti-collision features that prevent the same tag from being identified by multiple readers at the same time. This can be done by identifying the strongest tag signal and blocking all other signals. Another option is to limit the number of frames sent per second by each reader.
A new anti-collision protocol is being proposed that focuses on decreasing the energy consumption of each tag. It does this by analyzing the frame size update strategy of the state-of-the-art Aloha-based protocols. This results in a new protocol called the Energy-Aware Slotted Aloha (EASA) that decreases the number of frames transmitted and the average energy consumed per tag. This new EASA protocol was evaluated and compared with several state-of-the-art Aloha-based anti-collision protocols in relation to energy efficiency, and simulation results showed that it achieved a 6% average improvement in energy consumption.
Detection Range
The detection range refers to how far the RFID reader can detect a response signal from a passive or active tag. Several factors affect the detection range, including a tag’s size and materials, its location within a system, and the strength of the query signal from the reader.
The most common RAIN RFID systems operate in the 860 – 960 MHz frequency range. This frequency band is divided into two primarily subsets: 433 MHz for active tags, and 860-960 MHz for passive and semi-passive tags.
UHF RFID is one of the fastest growing technologies in asset management, and can offer many advantages to businesses looking to digitize their processes. With a UHF RFID reader and RFID tags, companies can streamline their operations to save time and money while improving accuracy and security.
NT 905 PX is a long range UHF RFID Reader that has the ability to sense EPC Gen 2 (ISO 18000-6C) compliant tags and cards at a distance up to 5 Meters under ideal conditions. Its rugged design makes it an ideal solution for demanding applications like in manufacturing, logistics, mining and vehicle tracking and locating.
This robust, compact handheld UHF RFID Reader is designed to work with a variety of mobile computers and tablets for use in the field. It’s comfortable to hold and is compatible with thick work gloves. Featuring an extended battery life and multiple communication interfaces, it’s perfect for mobile use in challenging environments.
Memory
RFID is used as a tracking and inventory management technology for many applications, from the retail industry to unmanned warehouses. It is also used to help prevent theft and fraud in a variety of settings, from luxury goods to automobiles. The technology can speed up and automate a number of business processes and increase accuracy and efficiency in a wide range of areas, including manufacturing and distribution.
Passive UHF RFID chips compliant with EPC Global Class 1 Gen 2 standards have become a popular choice for a variety of industrial tracking and inventory management systems. These UHF RFID Reader passive RFID chips operate in the 860 MHz to 960 MHz frequency range and come in various configurations, with different features and capabilities. Knowing the type of chip you have in your UHF RFID reader is essential to maximize compatibility with existing tracking and inventory management systems, as well as to ensure that the system is secure.
Most Gen 2 RFID tags have four banks of non-volatile memory – a Reserved Memory bank, an EPC Memory bank, a Tag Identification (TID) Memory bank, and a User Memory bank. Each memory region is 16 bits long and accessed in parts, called words. The reserve memory contains the RFID Tag’s Access and Kill passwords, which enable it to be locked in both read and write modes.