RFID Application Overview and Testing Requirements
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
RFID allgemein verständlich Dipl.-Ing. Hardy Zissel
Leiter AutoID / RFID Testcenter, TH Wildau Tel.: +49 3375 508 453,
[email protected]
Ingenieurbüro Zissel, Königs Wusterhausen Tel.: +49 3375 209005,
[email protected]
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
Agenda 1. RFID Communication Systems, Standards, and Applications 2. RFID Signal Overview at UHF Frequency Band 3. RFID Signal Analysis (Reader/Interrogator and Tag) 4. RFID Measurement Solutions
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
What’s RFID?
Radio Frequency IDentification
•Definition of RFID devices –Portable size –Data storage memory in IC chip –Capable of contactless communication •RFID features –Communicates longer distances than barcode; tolerant of dirt and interference –Communicates more data in readable, rewriteable IC chip •Some advantages compared with barcode –Uses in automated check-out with lower costs –Eliminates human error factors for improved information quality –Enables individual item recognition for traceability and tracking
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
RFID Communication Definitions Forward link: transmission from Reader to Tag Reader (Interrogator)
(“base station”)
Tag
Return link: transmission from Tag to Reader (“mobile station”)
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
RFID Systems Description
Tags Readers/Interrogators
Hardy Zissel Matthias Weilhammer Thomas Giehm
• Wireless transducer with antenna • Tag physical design dependent on end-use
RFID Testing Requirements
RFID Tags - Active • Active • On-board power source and transmitter • Higher range ( Measure tag response and communication timing
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
VSA RFID Modulation Analysis
Traffic conditions
Demod bits
ASK Summary Hardy Zissel Matthias Weilhammer Thomas Giehm
Burst Summary RFID Testing Requirements
Signal Analysis for Standard Compliance
Easy identification of bursts in time domain
Demodulated bits Hardy Zissel Matthias Weilhammer Thomas Giehm
Demodulated waveform
Modulation depth and time domain analysis RFID Testing Requirements
Tag and RFID System Measurements
Clear burst identification with direction indicated
Detect bursts with length and interval timing Time length of entire CW power Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
Summary and Conclusions on RFID measurement requirements • RFID Communication Systems, Standards, and Applications – RFID tags respond to Reader/Interrogator’s signal power – Need measurements under multi-path, attenuated signal in the air
• RFID Signal Overview at UHF Frequency Band – Various standards with parameters like bit rate, tari, line coding – Pulse rise time and modulation quality need to be analyzed
• RFID Signal Analysis (Reader/Interrogator and Tag) – Reader/Interrogator : Standard compliance with FFT, Regulation test with Swept SA – Tag and RFID systems: Measure low level response with SA
• RFID Measurement Solutions – Signal Analyzer with Swept-SA and AutoTune plus FFT-based VSA Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
Thank You for Your Attention !
Hardy Zissel Matthias Weilhammer Thomas Giehm
RFID Testing Requirements
