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An EMC antenna is an important tool in EMC testing that is used to measure radiated emissions and radiated immunity. EMC antennas are used for EMC measurements in rugged environments that involve frequent handling and rapid replacement. EMC antennas with broad bandwidths have a broad frequency spectrum covered in the performance of immunity measurements and EMC radiated emissions. EMC antennas have two types of measurements, radiated immunity and radiated emissions.
Antenna Factor is the ratio of the electric field E to the voltage V induced across the terminals of an antenna. Additionally, Antenna Factor (AF) is when radiated emissions testing is used to convert a voltage level fed by a transducer. Made to quantify bandwidth, the AF EMC antenna parameter also quantifies the value of incident electric fields while the companion parameter, TAF, determines the value of the electric field at a known distance from the generating antenna. The transducer is converted to the input terminals of an EMI analyzer into field-strength units of the electromagnetic field producing the voltage.
The Antenna Factor, (AF), is the antenna specification that is most often used. In regards to the antenna factor, there is a relationship between electric field power and the power density of the incident as well as the electric field strength. Transmit Antenna Factor, or TAF refers to the means of input voltage to the antenna that provides a certain value of the electric or electromagnetic field at a specific distance from the antenna. The transmit antenna factor relates the value of the electromagnetic field or the electricity generated by the antenna as a basis of its input.