Accurate EMC Testing with RadiSense Field Probes
In EMC testing, fields don’t behave predictably due to reflections, which are frequency dependent. Even in an anechoic chamber where theE-field is directed straight at the field probe or EUT, reflections arrive from multiple angles. Because of this complex and often non-ideal field behaviour, it becomes essential to consider how measurement equipment responds to these fields coming from different directions. According to the of the uses 16-point calibration these reflections may vary minus zero up to 6 dB. This means the reflection might be as strong as the direct signal! Imagine if the e-field probe has a deviation where those reflections are measured at twice the actual value.
In EMC measurements, one often overlooked however crucial parameter is the (an)isotropy of the e-field probe. This refers to the ability of an E-field probe to read the same electric field strength regardless of how the probe is oriented in space. In our white paper we explain that a perfectly isotropic probe will deliver identical readings even if you rotate it around all axes, making the measured field “spherical” (360° around). The RadiSense provides a superbly low anisotropic error over its entire frequency range, especially at high frequencies. This way every field strength reading remains reliable and accurate regardless how the e-field probe is positioned and how the field reaches the probe.
Each RadiSense® probe is engineered for accuracy through advanced multi-antenna design and symmetrical geometry. This results in measurements of actual field strength with the most accuracy. As a result, engineers can trust every reading to represent actual electromagnetic conditions in the test environment.
Anisotropy
Anisotropy plays a key role in precision. A low anisotropy value means that the probe delivers the same accuracy, regardless of where the signal originates. This characteristic is critical for complex EMC test setups where reflections and interference can distort results.
All our field probes are verified through ISO/IEC 17025-traceable calibration at the Raditeq accredited calibration lab. In addition to the accredited calibration, we also supply anisotropy measurement data according to the IEEE1309. This is to further validate and to ensure reliability for long-term use of our field probes.