Transfer Impedance

Are transfer impedance and shielding effectiveness really reciprocals? Despite common belief, these critical shield characterization parameters aren't directly related. Learn how triaxial and reverb chamber measurements differ fundamentally, and what these numbers actually tell you about shield quality.

When cables become the culprit in radiated emissions failures, an RF current probe can catch what near-field probes miss. This installment of EMC Bench Notes walks through measurement technique, transfer impedance math, and a downloadable E-field calculator for pass/fail estimation.

Current probes are transformers that translate magnetic fields into measurable voltages. This comprehensive guide explains the physics behind current probe measurements, from Faraday's law to transfer impedance calculations, with real EMC test results in all three detection modes.