Verification method for quasi-test site used in measuring radiated electromagnetic disturbance from EUT unable for conventional test site

In this paper, regarding the measurement of radiated emissions from 30 MHz to 1 GHz, it has been studied that the method to verify whether it can be applied as a quasi-test site in the place that is not conventionally used as a test site, assuming the inside of the factory of electronic and electrical equipment manufacturers. We proposed a method for evaluating the site insertion loss (SIL) of a quasi-test site using the site attenuation (SA) evaluation method of a test site specified in CISPR 16-1-4. As the results of the evaluation using an ideal semi-anechoic chamber (SAC) with no reflection of surrounding obstacles, for the
$\Delta \text{SIL}$
at the limited height scanning of the receiving antenna between 1 m – 2 m, it was found that the deviation from
$SA_{SAC}$
was within 2.2 dB. In addition, it was found that at least more than five measuring points between 1 m – 2 m would be needed for the deviation within 2.4 dB. It is shown that the measurement of
$\Delta SIL$
can verify the characteristics of the quasi-test site where the measurement environment is limited such as FIS (factory inspection site) with a simple procedure.