Anechoic Chambers are mostly used for radiated emissions/RF disturbance and radiated immunity/susceptibility tests. On this post we are listing the four EMC tests that can be performed in anechoic chambers:
1. Radiated Emissions: RF disturbances emitted from the EUT is measured by using antenna, RF cable and measuring receiver. EUT is placed 1, 3 or 10 meter away from the measuring antenna.
2. Radiated RF Immunity: Electric field is generated and subjected to the EUT inside the anechoic chamber. Field level can be 3 V/m or can go up to 200 V/m, the level depends on the product or EMC standard you use.
3. Conducted Emissions: If you have no screened room (shielded enclosure) you can performe conducted emissions measurements inside an anechoic chamber since it is also a screened room. RF disturbances emitted from EUT’s ports are measured via AMN/LISN or ISN’s.
4. Conducted RF Immunity: Modulated RF signal is generated and injected to the EUT inside the anechoic chamber. The voltage that will be applied to EUT’s ports can be 3 V, or can go up to 30 V, the level depends on the product or EMC standard you use.