Digital Signal Processing Reference
In-Depth Information
Miniaturised transponder formats are possible (animal ID) due to the use of ferrite
coils in the transponder.
Low absorption rate or high penetration depth in non-metallic materials and water
(the high penetration depth is exploited in animal identification by the use of the
bolus, a transponder placed in the rumen).
6.78MHz
Can be used for low cost and medium speed transponders.
Worldwide ISM frequency according to ITU frequency plan; however, this is not
used in some countries (i.e. licence may not be used worldwide).
Available power is a little greater than that for 13.56MHz.
Only half the clock frequency of that for 13.56MHz.
13.56MHz
Can be used for high speed/high end and medium speed/low end
applications.
Available worldwide as an ISM frequency.
Fast data transmission (typically 106 kbits/s).
High clock frequency, so cryptological functions or a microprocessor can be
realised.
Parallel capacitors for transponder coil (resonance matching) can be realised on-
chip.
27.125MHz
Only for special applications (e.g. Eurobalise)
Not a worldwide ISM frequency.
Large bandwidth, thus very fast data transmission (typically 424 kbits/s)
High clock frequency, thus cryptological functions or a microprocessor can be
realised.
Parallel capacitors for transponder coil (resonance matching) can be realised on-
chip.
Available power somewhat lower than for 13.56MHz.
Only suitable for small ranges.
5.2
European Licensing Regulations
5.2.1
CEPT/ERC REC 70-03
This new CEPT harmonisation document entitled 'ERC Recommendation 70-03 relat-
ingtotheuseof short range devices (SRD)' (ERC, 2002) that serves as the basis for
new national regulations in all 44 member states of CEPT has been available since
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