Moreover, a specific antenna known as Van Veen Loop is used to measure the emissions of the electronic system or device on three different axes (X, Y, and Z). Loop antennas are the most frequently used magnetic field antennas in EMC testing. The magnetic field (H-field) is measured with either an electromagnetic interference receiver, spectrum analyzer, or measuring antenna. The testing labs use spectrum analyzers, measuring antennas, and electromagnetic interference receivers to measure radiated emissions. These emissions travel through the air either directly from devices or from their interconnected cables. Radiated emissions are any electromagnetic interference produced by electrical devices or systems. In this test, two types of EMC emission testing are examined: the conducted emission and the radiated emission. There are two categories of EMC testing methods:ġ. ![]() Those devices' electromagnetic emissions can interfere with aircraft navigation systems that ensure a safe landing. The following example illustrate the danger posed by electromagnetic emissions and how these affect victims:ĭuring an airplane flight, passengers are asked to turn off their electronic devices: It shows the danger you may face when an announcer asks you to turn off your tablet, laptop, and mobile phone. In simple words, the more immune a device is to electromagnetic interference, the less susceptible it is. Susceptibility is how vulnerable a device is to interference. There is an opposite relationship between immunity and susceptibility. It is basically defined as how resistant a device is. In an electromagnetic environment, immunity is the ability of the electronic device to function normally without getting affected by other electronic devices' emissions. Testing at this stage is generally known as Electromagnetic Interference (EMI).
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