How does a passive radio-frequency identification (RFID) system work?

2025-04-27Cykeo News RFID FAQ 7520

A passive RFID system uses radio waves to wirelessly identify and track objects without requiring an internal power source in the tag. This technology is widely used in logistics, retail, and asset management due to its cost-effectiveness and simplicity. Here’s a detailed breakdown of its components and workflow.

1. Key Components of a Passive RFID System

RFID Tag:
- Contains a microchip (stores data like a unique ID) and an antenna.
- No battery—powered entirely by the reader’s radio waves.
RFID Reader:
- Generates an electromagnetic field to energize tags and receive their data.
- Example: Cykeo’s UHF Passive Readers operate at 860–960 MHz for long-range scanning.
Antenna:
- Integrated into the reader or standalone, it transmits and receives signals.
Software:
- Converts raw tag data into actionable insights (e.g., inventory counts, location tracking).

2. Step-by-Step Communication Process

Reader Activation:
- The reader emits radio waves via its antenna, creating an electromagnetic field.
Tag Power-Up:
- A passive tag entering this field harvests energy from the waves to power its microchip.
Data Transmission:
- The tag’s antenna reflects the reader’s signal, modulating it with the stored data (e.g., “Tag ID: 12345”).
Signal Decoding:
- The reader detects the modulated signal, decodes the data, and forwards it to the software.

3. Advantages of Passive RFID Systems

Cost-Effective:
- Tags cost 0.10–1.00 each, ideal for large-scale deployments.
Durability:
- No batteries mean tags last 10+ years in harsh environments.
Range:
- UHF passive tags can be read from 1–12 meters, depending on reader power and antenna design.

4. Common Applications

Inventory Management:
- Scan hundreds of tagged items in seconds during warehouse audits.
Retail Checkout:
- Automate payment processes with RFID-enabled product tags.
Asset Tracking:
- Monitor tools, equipment, or medical devices in real time.

5. Cykeo’s Role in Passive RFID Solutions

Cykeo’s readers support ISO 18000-6C/EPC Gen2 standards, ensuring global compatibility.
Their software suite includes CloudTrack, which visualizes tag data for analytics and reporting.

Case Study: 80% Faster Warehouse Audits

A European logistics company reduced inventory audit times from 8 hours to 90 minutes using Cykeo’s passive RFID system, tracking 20,000+ pallets monthly.

passive RFID components

CYKEO-70-20 Anti-Liquid Passive RFID Tags

CYKEO-PCB1504 Anti-Metal RFID Tags

CYKEO-PCB7020 On-Metal RFID Tags

CYKEO-60-25 Flexible Anti-Metal RFID Tag

CYKEO-70-15 RFID Laundry Tag

CYKEO-125-7 UHF RFID Book Tag

CYKEO-55-30 MEDICAL RFID LABEL WITH

CYKEO-88-28 UHF RFID Cable Tie Tag

CYKEO-73-20 UHF RFID Asset Tag

CYKEO-85-54 UHF RFID WHITE CARD

CYKEO-85-54 HF RFID Cards

CYKEO-68-26 Jewelry UHF RFID Tag

CYKEO-B5L iPhone RFID Reader

CYKEO-B4L Mobile Android RFID Reader

CYKEO-B9 UHF Bluetooth Handheld RFID Scanner

CYKEO-B4 Professional UHF Handheld RFID Reader

CYKEO-B2 RFID Handheld Scanner

CYKEO-B3 Pro Rugged RFID Reader Handheld

CYKEO-B3L Industrial UHF RFID Handheld Reader

CYKEO-C1 Industrial Forklift RFID Reader

CYKEO-R4 4-Port UHF RFID Fixed Reader

CYKEO-R4L 4-Port Fixed UHF RFID Reader

CYKEO-R8L 8-Port Fixed RFID Reader

CYKEO-R16L 16-port UHF RFID Fixed Reader

PgUp: RFID in Healthcare: The Silent Guardian Saving Lives and ResourcesPgDn: What are the benefits of using RFID tracking systems?

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