Radiated Immunity — What It Tests & Why
Every product lives in a sea of RF — phones, radios, Wi-Fi, industrial transmitters. Radiated immunity proves your product keeps working when that field hits it.
Products operate surrounded by intentional radio transmitters — two-way radios, cellular handsets, Wi-Fi, broadcast, industrial and medical RF equipment. Radiated immunity (susceptibility) testing verifies that a product continues to function correctly when illuminated by such a field, rather than glitching, mis-reading sensors, or resetting.
The victim is rarely the digital core — it's usually a high-impedance analog node (sensor input, reset, feedback) or a cable acting as a receiving antenna. RF picked up on a cable is carried into the board and demodulated at any nonlinear junction (a diode, an ESD cell, a transistor input), turning an 80% AM carrier into a 1 kHz disturbance right in your signal band.
We follow the EMC-track arc: understand the stress, learn the standard and chamber, trace the coupling, then fix at the input, cable, grounding and firmware levels — finishing with a bench pre-compliance workflow. Cross-links to the Radiated Emissions and Pre-Compliance courses appear throughout.