1 RFID – R adio F requency ID entification Overview: 1. Basics about RFID 2. Terms of radio transmission (Frequency, Wave length, Signal, Power) 3. Antenna characteristics 4. Mounting hints for Hamster-R and antennas 5. Communication with Hamster-R 6. Software demonstration 7. Outlook automatic functions
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RFID – Radio Frequency IDentification - Quest Tech · RFID – Radio Frequency IDentification Overview: 1. Basics about RFID 2. Terms of radio transmission (Frequency, Wave length,
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RFID – Radio Frequency IDentification
Overview:1. Basics about RFID
2. Terms of radio transmission (Frequency, Wave length, Signal, Power)
3. Antenna characteristics
4. Mounting hints for Hamster-R and antennas
5. Communication with Hamster-R
6. Software demonstration
7. Outlook automatic functions
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RFID SystemsPassive systems
- inductive, electromagnetic field- no power supply- for very short distances- typical application: "intelligent labels"
Active systems
- Radio transmission- Power supply needed- for middle distances- typical application: HAMSTER-R
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RFID ComponentsEach RFID System consists of:
Host Reader Antenna Transponder
PC Hamster-Port Hamster-R
Radio Transmission(max. 70-100m)
Network Cable(max. 100m)
Antenna Cable(max. 10m)
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Wave length [Meter]
Distance between two peaks.
Frequency / Wave lengthFrequency [Herz]
How many peaks pass a fix point in one second.
Examples
0.125 m2.4 GHzWireless LAN
0.167 m1.8 GHzGSM Mobile Phone
0.345 m868 MHzHamster-R RFID
Wave lengthFrequencyApplication
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Direct waveReflected wave
Reflections / Signal superpositionReflections can produce unforeseeable results. Mostly they are helpful and increase the change to find a datalogger.
Recommendation:Use always two antennas to prevent problems.
Resulting wave
Resulting wave Resulting wave
no significant signal change singnal improvment signal reduction