The Compact B40 can connect up to two Pepperl+Fuchs RFID read/write devices and slots into both PLC-based automation setups and modern IT architectures. It features a multiprotocol Ethernet interface with an integrated switch, supporting both PROFINET and EtherNet/IP protocols out of the box. For teams working on IIoT and cloud-connected workflows, a built-in REST API provides direct access to tag data without the need for middleware or custom gateway solutions.

Commissioning and configuration are handled through an intuitive web interface, which covers all connected Pepperl+Fuchs readers and writers across the IPH (LF), IQH (HF), and IUH (UHF) product lines. Automatic time synchronisation via NTP and SNTP ensures that event timestamps remain accurate across distributed systems, a practical detail that matters when traceability and audit trails are involved.

On the physical side, the unit is built for tough environments. An IP67-rated encapsulated metal housing allows deployment in conditions ranging from -25 degrees Celsius to 70 degrees Celsius, making it suitable for factory floors, loading docks, and outdoor logistics operations where dust, moisture, and temperature swings are part of daily life.

One of the standout features of the Compact B40 is its compliance with the EU Cyber Resilience Act (CRA), which comes into effect in 2027. The device supports software updates through its web interface, ensuring that both IT and OT security requirements can be maintained over time. For businesses investing in industrial RFID infrastructure today, this forward-looking approach provides a degree of investment protection that is increasingly important as regulatory requirements tighten.

Pepperl+Fuchs highlights several key application areas for the new unit. In CNC machining centres, it enables reliable workpiece and tool identification. In material handling, intralogistics, and airport baggage systems, the multi-frequency support allows a single evaluation unit to work across different tag standards already deployed in the field. Retail and apparel businesses can use the REST API integration for inventory tracking, omnichannel fulfilment, Click and Collect operations, theft protection, and supply chain traceability.

The combination of multi-frequency support, dual industrial Ethernet protocols, IIoT connectivity, and CRA compliance positions the IDENTControl Compact B40 as a versatile option for organisations looking to consolidate their RFID infrastructure without sacrificing flexibility or future-proofing.

Read more at https://www.pepperl-fuchs.com/en/news/future-ready-identcontrol-compact-rfid-evaluation-unit-for-seamless-integration-into-plc-and-it-based-systems-gn10112

The post Pepperl+Fuchs IDENTControl launch Compact B40 CRA-Ready Multi-Frequency RFID Unit first appeared on RFID News.

How LF RFID Works

LF RFID systems operate within the 125 kHz to 134.2 kHz frequency band, with 125 kHz being the most widely adopted standard. At this frequency, electromagnetic waves have a relatively long wavelength, which gives LF RFID some distinctive physical characteristics.

The read range of LF RFID is typically limited to less than 10 centimetres. While this may seem like a limitation compared to HF or UHF alternatives, it is actually a deliberate advantage in many scenarios. A short, predictable read range means that tags are only detected when brought into close proximity with a reader, reducing the risk of unintended or accidental reads.

LF tags are predominantly passive, meaning they draw their operating power from the electromagnetic field generated by the reader. This eliminates the need for an on-board battery, keeping tags small, inexpensive, and virtually maintenance-free.

Why LF RFID Excels Near Metal and Water

One of the standout qualities of LF RFID is its resilience in challenging environments. Unlike higher-frequency RFID systems, which can suffer from signal reflection, absorption, or detuning when used near metal surfaces or in the presence of water, LF RFID performs reliably in both conditions.

The longer wavelength at 125 kHz is far less susceptible to interference from metals and liquids. This makes LF the preferred frequency for industrial settings, outdoor environments, and any application where tags may be exposed to moisture, mud, or metallic housings.

Key Applications of LF RFID

LF RFID technology is deeply embedded in several major sectors, each taking advantage of its ruggedness and dependable short-range performance.

Animal Tagging and Identification

LF RFID is the global standard for livestock and companion animal identification. Microchips implanted under the skin of pets, cattle, sheep, and horses operate at either 125 kHz or 134.2 kHz (the ISO 11784/11785 standard). These tiny glass transponders can last the lifetime of the animal, providing a permanent and tamper-proof form of identification. Farmers and veterinarians use handheld LF readers to scan animals quickly, supporting traceability, health records, and regulatory compliance.

Access Control

Proximity cards and key fobs used in building access systems are among the most familiar LF RFID applications. Technologies such as HID Prox and EM4100 operate at 125 kHz, enabling employees and residents to unlock doors by holding a card near a wall-mounted reader. The short read range is ideal here, as it ensures that only the card presented at the reader is authenticated, preventing cross-reads from nearby cardholders.

Automotive Immobilisers

Nearly every modern vehicle uses an LF RFID transponder embedded in the ignition key or key fob as part of its immobiliser system. When the key is inserted or brought close to the steering column, the vehicle’s reader energises the transponder and verifies its unique code. If the code does not match, the engine will not start. This passive, battery-free approach to vehicle security has dramatically reduced car theft rates worldwide since its widespread adoption in the late 1990s.

LF RFID: Still Relevant in a High-Frequency World

Despite the growth of NFC, UHF, and other wireless technologies, LF RFID continues to thrive in niches where its core strengths matter most. Its tolerance of metal and water, combined with a reliable and secure short-range read, makes it difficult to replace in animal identification, physical access control, and automotive security.

For organisations evaluating RFID solutions, understanding where LF fits into the broader frequency landscape is essential. It may not offer the speed or range of its higher-frequency counterparts, but when the application demands ruggedness, simplicity, and close-range precision, 125 kHz technology delivers.

The post What is LF RFID? Understanding 125 kHz Technology first appeared on RFID News.

The new rules establish a binding obligation for all dogs and cats kept within the EU, including privately owned pets, to be identified using implanted RFID transponders compliant with ISO 11784 and ISO 11785 standards. These passive LF (Low Frequency) transponders operate at 134.2 kHz and use FDX-B (Full Duplex B) encoding to transmit a unique 15-digit identification code when scanned. The microchips, roughly the size of a grain of rice, are injected subcutaneously by a veterinarian and require no battery, drawing their power from the electromagnetic field generated by the RFID reader during scanning.

Once microchipped, each animal must be registered in interoperable national databases. Microchip identification numbers and associated database information will be stored in a single index database managed by the European Commission, creating an EU-wide traceability infrastructure for companion animals. This centralised approach replaces the previously fragmented patchwork of national systems that varied widely in scope and enforcement.

The regulation introduces a phased implementation timeline. Sellers, breeders and shelters will have four years from the date the legislation enters into force to comply with the microchipping and registration requirements. For private pet owners who do not intend to sell their animals, the deadline extends to 10 years for dog owners and 15 years for cat owners, acknowledging the practical challenges of retroactively chipping millions of existing household pets.

Animals imported from non-EU countries for commercial sale must be microchipped before entering the EU and subsequently registered in a national database. Pet owners travelling into the EU with their animals will be required to pre-register their microchipped pet in a recognised database at least five working days before arrival, unless the animal is already registered in an EU member state.

Beyond microchipping, the regulation addresses broader animal welfare concerns. It bans the breeding of dogs and cats with exaggerated physical characteristics that pose significant health risks, such as overly short legs or flat faces. Practices including ear-cropping and tail-docking are also prohibited under the new framework. The rules set minimum welfare standards for kennels and shelters, and aim to tackle the illegal pet trade, which is estimated to be worth 1.3 billion euros annually across the EU.

The legislation now requires formal approval from EU Member States before entering into force, which is widely expected to be a formality given the broad political consensus behind the measures. Public support for the rules has been substantial, with surveys indicating strong citizen backing for harmonised EU-level animal welfare standards.

For the RFID industry, the regulation represents a significant expansion of the LF animal identification market across Europe, driving demand for ISO-compliant transponders, readers and the backend database infrastructure needed to support interoperable registration systems at a continental scale.

Read more at https://www.europarl.europa.eu/pdfs/news/expert/2026/4/press_release/20260423IPR41833/20260423IPR41833_en.pdf

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The researchers attached RFID tags to 167 buff-tailed bumblebees before releasing them one kilometre from their nests. Using RFID readers positioned at the nest entrances, the team monitored which bees successfully returned over a three-day observation window. This method of RFID-based animal tracking allowed precise, automated data collection that would have been nearly impossible through visual observation alone.

The results were striking. Bumblebees in the control group, which had no exposure to prallethrin, returned to their nests at a rate of 37%. Those exposed to the insecticide for just one minute showed similar return rates. But after ten minutes of exposure, the return rate dropped to just 17%. Most alarming of all, bees subjected to twenty minutes of exposure managed only a 5% return rate.

Crucially, the insecticide did not appear to kill the bees outright. Mortality rates stayed consistent across all groups, which points to a specific impairment of navigation rather than general toxicity. The bees were alive but simply could not find their way home.

Senior Research Fellow Olli Loukola stressed the wider implications: “Returning to the nest is essential to survival of the entire colony.” When foraging bees fail to return, the colony loses its food supply. Over time, this weakens the population and reduces the number of new queens produced, threatening the long-term survival of local bumblebee populations.

The use of RFID technology in this study highlights the growing role of radio frequency identification in ecological and environmental research. Small, lightweight RFID transponders operating at low frequency (LF) are increasingly used to track insects, birds, and other small animals in field conditions. The technology provides reliable identification without the need for visual contact, making it ideal for monitoring wildlife behaviour over extended periods.

In Finland, Thermacell devices are already restricted to immediate residential areas such as gardens and patios, and are prohibited for use indoors or in natural environments. However, the researchers argue that these restrictions may not go far enough. They are calling for a broader reassessment of the ecological safety of household insecticides that affect pollinators.

The study was published in the journal Biology Letters.

Read more at https://www.utu.fi/en/news/press-release/insecticide-in-insect-repellents-impairs-bumblebees-ability-to-navigate

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The Core Principle: Electromagnetic Coupling and Backscatter

At its heart, RFID is built on a simple principle from physics: electromagnetic induction and, at higher frequencies, radiative coupling. If you have ever used a wireless phone charger, you already have an intuition for how passive RFID works. A wireless charger uses a coil to generate an alternating magnetic field, and a receiving coil in your phone converts that field back into electrical current. RFID uses the same underlying mechanism, but instead of just transferring power, the tag also modulates the signal to send data back to the reader.

In a passive RFID system, the reader transmits a carrier signal from its antenna. When this signal reaches a passive tag, the tag’s antenna absorbs enough energy from the electromagnetic field to power up its integrated circuit. The chip then modulates the impedance of its antenna, which alters the reflected signal in a process known as backscatter. The reader detects these tiny variations in the reflected signal and decodes them into meaningful data. There is no battery on the tag. The entire transaction is powered by the reader’s transmitted energy field.

This is where the parallel with wireless charging becomes particularly clear. Both technologies rely on resonant coupling between two antennas tuned to the same frequency. The difference is purpose: wireless charging maximises power transfer efficiency, while RFID optimises for data communication with just enough harvested energy to wake the chip.

Active vs Passive RFID: Two Fundamentally Different Approaches

RFID splits into two broad categories based on how the tag gets its power: active and passive. Understanding the distinction is essential because it determines read range, cost, battery life, and suitable applications.

Passive RFID tags contain no onboard power source. As described above, they harvest energy from the reader’s RF field, use it to power their IC, and respond via backscatter modulation. Because they rely entirely on the reader for power, their read range is limited by how much energy the reader can deliver to the tag. Passive tags are cheap to manufacture, often costing just a few pence each in volume, and they have an effectively unlimited operational lifespan since there is no battery to deplete. This makes them ideal for high-volume applications such as retail inventory, supply chain tracking, and access control.

Active RFID tags, by contrast, carry their own battery. This onboard power source means the tag can transmit its own signal rather than relying on backscatter. The result is significantly greater read range, often 100 metres or more compared to a few metres for most passive systems. Active tags can also support more complex sensors, larger memory, and continuous broadcasting (known as beaconing). The trade-off is cost and maintenance. Active tags are more expensive, physically larger, and their batteries eventually need replacing, typically after three to five years depending on beacon rate and environmental conditions.

There is also a middle ground: Battery-Assisted Passive (BAP) tags, sometimes called semi-passive tags. These contain a battery that powers the IC, but they still communicate via backscatter rather than active transmission. This gives them better read range and sensitivity than purely passive tags while keeping the communication method simple.

Frequency Bands: LF, HF, and UHF

RFID operates across several frequency bands, and the choice of frequency has a profound impact on read range, data rate, penetration through materials, and susceptibility to interference. The three primary bands are Low Frequency (LF), High Frequency (HF), and Ultra-High Frequency (UHF).

Low Frequency (LF) – 125 kHz to 134.2 kHz

LF RFID uses near-field inductive coupling. The tag and reader antennas behave like the primary and secondary windings of a transformer, with energy transferred through the magnetic component of the electromagnetic field. Because the wavelength at 125 kHz is extremely long (approximately 2,400 metres), the tag is always in the near field of the reader antenna, and propagation behaves according to magnetic field coupling rather than wave propagation.

LF signals penetrate water and animal tissue reasonably well, which is why this frequency band has been the standard for animal identification and livestock tagging for decades. It is also widely used in access control and vehicle immobiliser systems. The downside is short read range (typically under 10 cm) and slow data transfer rates. The low carrier frequency simply cannot support high bandwidth.

High Frequency (HF) – 13.56 MHz

HF RFID also operates primarily through inductive coupling, but at a much higher carrier frequency. The wavelength at 13.56 MHz is about 22 metres, so the tag is still typically within the near field of the reader, but the shorter wavelength allows for smaller, more efficient antennas and higher data transfer rates than LF.

The 13.56 MHz band is globally allocated for industrial, scientific, and medical (ISM) use, making it one of the most universally available RFID frequencies. It forms the basis for several important standards, including ISO 15693 for vicinity cards and ISO 14443 for proximity cards.

NFC: The HF Subset Everyone Knows

Near Field Communication, or NFC, operates at 13.56 MHz and is technically a subset of HF RFID. What distinguishes NFC is its standardised communication protocols (defined in the NFC Forum specifications and built on ISO 14443 and FeliCa) and its support for peer-to-peer communication. While traditional HF RFID is strictly a reader-to-tag relationship, NFC devices can operate in three modes: reader/writer mode, card emulation mode, and peer-to-peer mode.

This flexibility is what makes NFC so versatile. Your smartphone can read an NFC tag (reader/writer mode), emulate a contactless payment card (card emulation mode), or exchange data with another NFC device (peer-to-peer mode). The intentionally short read range of NFC, typically 4 cm or less, is a feature rather than a limitation. It provides an implicit layer of security since you must physically bring the two devices close together to establish communication.

Ultra-High Frequency (UHF) – 860 MHz to 960 MHz

UHF RFID represents a fundamentally different approach to the RF link. At these frequencies, the wavelength is approximately 33 cm, meaning the tag is typically in the far field of the reader antenna. Communication relies on radiative coupling and backscatter rather than inductive coupling. The reader transmits a continuous wave, and the tag modulates its radar cross-section by switching its antenna between matched and mismatched impedance states. The reader then detects these amplitude or phase changes in the reflected signal.

This far-field operation is what gives UHF RFID its impressive read ranges, commonly 5 to 12 metres with standard passive tags and commercial readers. Data rates are also substantially higher than LF or HF, enabling rapid inventory of hundreds of tags per second. The RAIN RFID alliance, which promotes the GS1 UHF Gen2 standard (ISO 18000-63), has driven massive adoption of UHF RFID in retail, logistics, healthcare, and manufacturing.

However, UHF has its challenges. Water absorbs UHF energy and metals reflect it, causing multipath interference and detuning of tag antennas. Significant engineering goes into designing UHF tags that perform reliably on or near metal and liquid surfaces, using techniques such as raised antenna designs, spacer layers, and impedance-matching strategies.

The specific frequency allocation within the UHF band varies by region. In Europe, ETSI regulations permit operation between 865.6 MHz and 867.6 MHz, while the FCC in the United States allows 902 to 928 MHz. This regional variation must be accounted for when deploying global RFID systems.

Inside an RFID Reader: Antenna, Decoder, and Controller

An RFID reader is more than just an antenna. It is a carefully engineered system comprising several key components working together.

The antenna is the most visible part. In UHF systems, this is typically a circularly polarised patch antenna designed to maintain consistent read performance regardless of tag orientation. In HF and LF systems, the antenna is usually a coil or loop antenna optimised for magnetic coupling. Reader antennas come in various form factors, from handheld devices to fixed portal readers used in warehouse dock doors.

Behind the antenna sits the RF front end, which handles signal generation, amplification, and reception. The transmitter generates the carrier signal at the required frequency and power level, while the receiver must detect the extremely weak backscatter signal from the tag. The difference in power between the transmitted signal and the received backscatter can be 60 dB or more, making receiver sensitivity and noise floor critical design parameters.

The decoder, or baseband processor, extracts the data from the demodulated backscatter signal. It handles the protocol-specific encoding schemes. For example, UHF Gen2 uses a combination of PIE (Pulse Interval Encoding) for the reader-to-tag link and FM0 or Miller encoding for the tag-to-reader link. The decoder must also manage the anti-collision algorithms that allow a single reader to communicate with multiple tags simultaneously without data collisions.

Finally, the controller manages the overall reader operation, handles communication with host systems (via Ethernet, USB, serial, or wireless interfaces), and implements the higher-level application logic. In modern readers, this is often a capable embedded processor running a real-time operating system.

The Physics of Energy Harvesting

One of the most remarkable aspects of passive RFID is the tag’s ability to harvest enough energy from the reader’s field to power a silicon integrated circuit. At UHF frequencies, a typical passive tag IC requires between 15 and 30 microwatts to operate. The tag antenna must capture this power from the incident RF field while simultaneously modulating the backscatter signal for data transmission.

The tag IC contains a charge pump rectifier circuit that converts the received AC signal into DC voltage to power the chip’s digital logic. As reader-to-tag distance increases, the available power drops according to the inverse square law in the far field (for UHF) or the inverse cube law in the near field (for LF and HF). This power budget is ultimately what limits the read range of passive RFID systems.

Advances in IC fabrication technology have steadily reduced the power requirements of RFID chips, which directly translates into improved read range and reliability. Modern UHF RFID ICs from manufacturers like Impinj, NXP, and EM Microelectronic achieve sensitivity levels below -22 dBm, a figure that seemed unreachable a decade ago.

Bringing It All Together

RFID is not a single technology but a family of technologies united by a common principle: using radio frequency electromagnetic fields to identify and track objects without physical contact or line of sight. Whether it is an LF tag embedded in a cow’s ear, an NFC chip in a smartphone enabling a contactless payment, or a UHF label on a pallet racing through a distribution centre, the underlying physics of electromagnetic coupling, energy harvesting, and backscatter modulation remain consistent.

Understanding these fundamentals is what separates those who deploy RFID effectively from those who treat it as a black box. The choice of frequency band, active versus passive architecture, antenna design, and reader configuration all flow from the physics. Get those foundations right, and RFID delivers the kind of reliable, scalable automatic identification that drives modern supply chains, security systems, and connected products.

The post What is RFID and How Does It Work? A Technical Deep Dive first appeared on RFID News.

The contract was awarded following a rigorous formal procurement process that stretched over more than a year. Five companies submitted bids, including the previous incumbent provider that had served Sweden’s electronic monitoring needs for roughly 25 years. The fact that SuperCom displaced a supplier with that kind of tenure speaks volumes about where the technology evaluation landed.

Under the agreement, SuperCom will roll out its PureSecurity Electronic Monitoring Suite across several public safety programs. These include GPS tracking of offenders, home detention monitoring, indoor facility monitoring using RF-based beacon technology, and potential future expansion into alcohol monitoring.

The PureSecurity platform is built around a suite of purpose-designed hardware and cloud software. At the core sits the PureOne tracking bracelet, an all-in-one GPS device featuring multi-constellation positioning, BLE connectivity, and advanced tamper detection. For indoor environments where GPS signals fall short, the system uses PureBeacon, a lightweight RF device that provides reliable location verification inside buildings and correctional facilities. The platform ties everything together through PureMonitor, a cloud-based management layer that handles scheduling, geo-fence alerts, reporting, and real-time tracking data.

SuperCom has deep roots in RFID and identification technology, having operated in the space since 1988. The company’s electronic monitoring solutions draw on that heritage, combining RF and GPS tracking with encrypted communications and energy-efficient device architecture designed to maximize battery life in the field.

Sweden itself has been a pioneer in electronic monitoring within Europe, with probation programs dating back to 1994. SuperCom first entered the Swedish market with a $7 million contract in 2018, followed by additional projects including a juvenile monitoring program in 2022. This latest award cements the company’s position as the country’s primary EM technology partner.

CEO Ordan Trabelsi noted that SuperCom has now secured more than 15 national projects and expansions across Europe in recent years. The Sweden contract also includes scope for meaningful additional revenue if the government adds programs over the contract period.

For the broader electronic monitoring sector, the win underscores a continued shift toward integrated, multi-mode tracking platforms that combine GPS, RF, and cellular connectivity in a single ecosystem. As governments demand more capable and reliable supervision tools, suppliers with proven field deployments and scalable technology stacks are pulling ahead.

The post SuperCom Wins $17 Million National Electronic Monitoring Contract in Sweden first appeared on RFID News.