Airlogic ABM-400 Manual de usuario descargar pdf (Pagina 51)

- 51 -

Figure11.

Estimated growth of global market for RFID systems[3]

Read Range:

Read Range is the farthest distance between reader and tag at which reader can read the tag.

Determinants of read range include frequency of operation, Electromagnetic Interference (EMI)

levels, power of the reader (which is usually limited by Federal mandates), tag functionality, size

of stored data, read time, relative velocity between the tagged object and the reader, and antenna

design. The major factor among these is the frequency of operation based on the read range

requirement

Frequency Range:

The frequency ranges are categorized as Low (LF), High (HF), Ultra High (UHF) and

Microwave frequency. The choice of frequency range depends upon the application /

performance requirements and the regulatory requirements. The actual frequency values vary as

per geographical regions. For US and Canada, 13.56 MHz is considered as HF and UHF ranges

from 902 MHz-928MHz. This variation in actual frequency range values for geographical

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 147 148

Sin comentarios

Airlogic ABM-400 Manual de usuario Pagina 51