UHF RFID Tag
UHF RFID Tag is used in many industries from luxury garments and fashion to wine bottles and pharmacological products. Providing massive data in real time it is also powerful for traceability and inventory management.
Printed flexible meander monopole antennas reported in literature offer moderate to high antenna gain and small linear dimensions. In this work we developed a screen-printed passive RFID temperature sensor tag with such an antenna.
Read Range
A tag’s read range is the distance over which the chip emits a signal that can be detected by a reader. It depends on several factors, including the size and shape of the tag’s antenna and the materials it is made from. In general, a larger tag with a more complex antenna has greater read range than a smaller, simpler tag.
Depending on the application, different reading ranges are necessary. For instance, some tags require a higher read range to identify the item correctly. Others can be read from a much wider range, such as to track items in an outdoor environment that might be affected by weather conditions like temperature changes, wind and precipitation.
When comparing the performance of a UHF RFID tag, it is important to RFID Card consider the reading range as well as other factors. The tag’s reliability is just as important as its readability, and other factors might prevent a chip from being picked up at all, which can have a significant impact on the success of an application.
A simple way to measure the performance of an RFID tag is to compare the resonant frequency of its antenna with a reference. This can be accomplished by bending the antenna in two directions. The resonant frequency of the antenna is proportional to its electrical length, so a tag with a longer electrical length has a larger resonant frequency.
Read Speed
The ability to read tags over a greater distance enables new applications such as automated payment collection, park access control and keeping track of expensive race tickets. It also allows RFID systems to be implemented in situations where the transponder is obscured or light conditions are not optimal.
This increased read range is made possible by the fact that UHF RFID uses radio waves, rather than a direct line of sight, for communication with the reader. The RF waves penetrate the item being tagged and reflect off the surface, returning to the reader where the signal is demodulated to extract the tag information.
The maximum read distance is dependent on the antenna design, the item material (different dielectric properties require different antenna designs), the location of the tag in the item and its proximity to metal or liquid filled containers. The sensitivity of the tag IC and memory usage is also a factor.
In order to achieve a maximum reading distance, the antenna and IC impedances should be conjugate matched (i.e. (Z_ant) = (Z_IC). This can be achieved by using a series inductor on the IC or by impedance matching on the antenna itself. We have experimented with both options and found that a 10 nH series inductor provides the best results. The results are shown in Figure 4e.
Energy Efficiency
UHF RFID technology enables massive data collection on items within the supply chain. The system can be used for traceability, inventory management, and a wide range of other business applications. It also helps companies reduce overhead and increase operational efficiency. It is a very useful tool for e-commerce businesses and it can be applied to a wide variety of products from luxury garments and fashion clothing to wine bottles and pharmaceuticals.
Energy efficiency is a key factor for UHF RFID tags. They need to be able to operate for long periods of time, even when exposed to high temperatures. To achieve this, they need to be able to harvest energy from multiple sources and convert it into usable electricity. They also need to be able to maintain an internal voltage, which is the difference between the supply and demand sides of the circuit.
In order to improve the energy efficiency of UHF RFID tags, researchers have been exploring different power management techniques. This research involves two steps: the first step UHF RFID Tag involves simulation models that are designed and evaluated to determine the performance of different power storage structures. The second step involves the evaluation of different implementation variants using the model results from the previous step. The experimental results show that the proposed energy storage architectures can improve tag lifetime by up to 44% compared with the manufacturer given and guaranteed system performance parameters of state-of-the-art higher class systems.
Security
Depending on your needs, there are many different ways to add security to your UHF RFID system. This can include security measures like loss-identification and protection, memory locking, or privilege management for user data. Authentication is another key security measure. It requires that the tag and reader prove they can talk to each other before the tag tells the interrogator any information. This protects against skimming and eavesdropping.
Theft is a major issue at unsecured venues, and criminals are always looking for new tricks to steal credentials or credit card numbers. An active UHF RFID tag that’s encoded with a badge or wristband prevents this, and makes it nearly impossible for thieves to duplicate the credentials.
There are also other ways to improve the security of your RFID system, such as requiring that someone physically press a switch to activate the tag. This prevents skimmers from accessing the data on a tag without consent and helps ensure that your employees and customers are only getting the information they’re supposed to be getting. This is especially important in the retail and supply chain industries where privacy of personal information is critical.