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September 16, 2025

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## Introduction to RFID



**RFID**, or Radio Frequency Identification, is a transformative technology that has revolutionized data collection and asset tracking across numerous industries. At its core, **RFID** systems consist of tags, readers, and software that communicate via radio waves to identify and track objects automatically. Unlike barcodes, which require line-of-sight scanning, **RFID** enables non-contact, rapid data capture, making it indispensable in modern supply chain management, retail, healthcare, and beyond. The technology's ability to store and transmit data wirelessly has paved the way for innovations in automation, efficiency, and real-time visibility.

## How RFID Works


### Components of an RFID System
An **RFID** system comprises three primary components: tags, readers, and a backend system. **RFID** tags are embedded with microchips and antennas, storing unique identification data. These tags can be passive, drawing power from the reader's signal, or active, with their own power source for longer-range communication. Readers, equipped with antennas, emit radio waves to interrogate tags, capturing their data and transmitting it to software systems for processing. This seamless interaction allows for automated inventory checks, access control, and logistics tracking without human intervention.

### Frequencies and Applications
**RFID** operates across various frequency bands, each suited to specific applications. Low-frequency (LF) **RFID**, around 125 kHz, is ideal for access control and animal tracking due to its short range and resilience to interference. High-frequency (HF) **RFID**, at 13.56 MHz, is commonly used in smart cards and library systems, offering moderate range and data transfer speeds. Ultra-high-frequency (UHF) **RFID**, ranging from 860-960 MHz, provides long-range capabilities up to several meters, making it perfect for supply chain and retail inventory management. The choice of frequency depends on factors like read range, environment, and data requirements.


## Applications of RFID Technology

### Supply Chain and Logistics
In supply chain management, **RFID** has become a cornerstone for enhancing efficiency and transparency. Companies use **RFID** tags to track products from manufacturing to delivery, reducing errors, minimizing theft, and optimizing inventory levels. For instance, retailers like Walmart have implemented **RFID** to maintain real-time stock visibility, ensuring shelves are always stocked and r The Use of RFID for Human Identity Verification