Experimental Analysis of Radiated Emission Limits Regarding Test Facilities According to EN 55032

EN 55032 defines an open area test site (OATS) for radiated emission testing. There are two alternatives to OATS, which are semi anechoic chamber (SAC) or full anechoic room (FAR). SAC and FAR limit values for radiated emission test are different according to the standard. In this article, the consistency of the SAC and FAR limits are assessed by using comparison noise emitter (CNE). All tests are performed in the same chamber. Ferrite modification is applied to SAC in order to perform tests as a FAR. Thus, the number of variables which can affect the test results is kept at the minimum level. Measurements are performed in the frequency range of 30 MHz to 1 GHz. Measurements for CNE were made in two ways that are the antenna being constant at 1.55 meters and moving between 1 meter and 4 meters. Thereafter, margin levels were compared and the consistency of limit levels for SAC and FAR at the standard was analyzed.