By UBK-InfotechRFID Cards Explained: Uses, Benefits, Types, and Prices
An RFID card is a type of smart card that uses Radio-Frequency Identification (RFID) technology to store and transmit data. These cards are embedded with a small electronic chip and antenna, which communicate with an RFID reader using radio waves.
In simple terms, it refers to a contactless identification card used for tasks like logging attendance, opening doors, making payments, or tracking inventory.
How RFID Technology Works in Cards
RFID cards function by interacting with a compatible RFID reader. Here’s a simplified breakdown:
- Antenna: The card’s antenna picks up radio signals from the reader.
- Chip: The embedded chip processes this signal and sends back the relevant information.
- Reader: The RFID reader receives this data and performs an action (e.g., granting access, recording entry).
RFID systems operate at various frequencies:
- Low Frequency (LF): It needs touch, suitable for access cards.
- High Frequency (HF): Up to 1 meter range, common in RFID smart cards.
- Ultra High Frequency (UHF): Longer range 8-12 meters, often used in logistics and inventory systems.
Types of RFID Cards
1. Based on Power Source
- Passive RFID Cards: Do not have their own power supply. They are powered by the reader’s electromagnetic field. Most ID and access cards fall under this category.
- Active RFID Cards: Equipped with an internal battery for extended range and functionality. Typically used in specialized environments like vehicle tracking.
2. Based on Functionality
- Read-Only Cards: These contain fixed data that cannot be modified.
- Read/Write Cards: Users can update or overwrite the data on these cards, offering flexibility for changing user credentials or usage patterns.
3. RFID Smart Cards
RFID smart cards take it a step further by including microprocessors. These can store and process data, support encryption, and handle secure transactions. They're widely used for payment systems, public transport, and high-security access control.
Applications of RFID Cards
RFID cards have become indispensable in various sectors due to their versatility:
- Education: Used for student attendance, library management, and cashless canteens.
- Corporate Offices: Employee access control, time tracking, and secure entry.
- Transportation: Metro cards, highway toll payments, and vehicle tracking.
- Healthcare: Patient ID cards, medication tracking, and access to medical records.
- Events & Hospitality: Guest access cards, event registration, and cashless transactions.
Benefits of Using RFID Cards
Implementing RFID cards in an organization brings multiple advantages:
- Contactless Convenience: No need for physical contact — users just wave the card near a reader.
- Fast Processing: Speeds up check-ins, transactions, and entry points.
- High Security: Encryption and limited access features reduce the risk of unauthorized use.
- Durability: RFID cards are more robust than traditional cards, with better resistance to wear and tear.
- Real-Time Data: Instant updates and tracking allow for accurate monitoring and reporting.
RFID Card Price
The price of passive RFID cards is ₹8 – ₹25 per card. Bulk pricing and project-specific requirements can significantly influence the final cost.