Sensors & Electronics
Electronics & Sensors
Semi-Passive RF Tag Summary (293)
Semi-passive Tag Background:
Semi-passive tags have a small on-board battery that augments the backscatter data exchange. These tags have communication range of ~100 meters, the capability to perform monitoring and control, and perform diagnostics. These tags also have a low data bandwidth. These tags can not initiate communications, they must be read.
Application Dependent Customizable Features:
- Frequency band — 915MHz (ISM1) and 2450MHz (ISM2)
- Power management — not required — the battery is not normally being used
- Battery sizes
- Variety of sensor capability — temperature, humidity, shock, tamper, etc.
- Encryption algorithms less important since tag does not transmit, it only controls reflection of RF back to reader
PNNL applications developed include:
