Loop antennas are low frequency loop-shaped antennas used for measuring electromagnetic fields. This loop design makes it practical for use in EMC applications where measuring radiated immunity or emissions is important.
In order to have a complete test setup it is useful to have an
RF preamplifier operating at the same frequency range as the loop antenna, as well as a
spectrum analyzer. With this test setup, analyzing test results for radiated emissions allows for meeting certain test standards specified by FCC, CISPR, MIL-STD, and EN.