Electric Field Probes in Air
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NPL supplies systems to establish known electric field strengths for the calibration of small E-field probes in air. For frequencies from 100 kHz to 1 GHz, the field is generated inside a small TEM or Crawford cell.
The field are generated inside waveguides for frequencies between 1 GHz and 2.6 GHz. The probe is mounted on a manual rotation stage, so that each of the three sensors in the probe can be aligned with the field polarisation. There is a precision linear translation stage to allow the probe to be accurately inserted into the TEM cell or waveguide. The calibrated probe can be used as a reference to calibrate larger EMC and hazard monitors in a GTEM cell.
System
| TEM cell | (100 kHz to 1 GHz) |
| Waveguide System IEC R9 | (0.75 GHz to 1.12 GHz) |
| Waveguide System IEC R14 | (1.12 GHz to 1.70 GHz) |
| Waveguide System IEC R22 | (1.17 to 2.60 GHz) |
On-site installation and staff training for these systems is also available.