|
Factors Affecting Performance
Because power levels are low and reader fields are narrow, signals must be as unencumbered as possible. Nearby equipment of all types are the source of interference signals; i.e., motors, conveyors, robots, manufacturing equipment, wireless LAN’s, cordless phones, computers – actually, any device with a microchip and a power cord or cable (antenna-like structure) will emit RF energy which can interfere with the ability of the reader to receive a clean signal.
Protecting the Reader – Three Approaches Can Be Used
- Immunize the reader - Reduce sensitivity to unwanted incoming signals, especially higher harmonics of lower frequency clock rates.
- Reduce the sources of interference - Move them further away or eliminate them entirely if practical. Shield the nearby equipment at least addressing the interrogation frequency of the reader.
- Reduce RF emissions from readers - Shield readers from rebroadcasting tag back scatter signals. This cleans up the local reader network environment from unwanted signals; and, also introduces security against unwanted scrutiny.
RFID shielding attenuation of unwanted interference signals
Our family of RFID specific frequency-tuned shielding solutions addresses the greatest needs encountered at tag reader sites.
|
|
|
