Information that is useful in constructing test sites used to perform radiated emission measurements in the frequency range of 30 MHz to 18 GHz is provided. Final validity of a test site can only be determined by performing normalized site attenuation and/or site voltage standing-wave ratio measurements as described in ANSI C63.4.

This guide provides information on construction of radiated emission test facilities in the frequency range of 30 MHz to 40 GHz. Standardized site validation methods above 18 GHz remain unavailable at present, however the changes in this edition are considered appropriate guidance for use up to 40 GHz. In general, the construction techniques described apply either below 1 GHz, or for 1 GHz and above. This guide does not address construction code compliance issues. Parties responsible for the design and construction of test sites are advised to consult with the various authorities having jurisdiction (AHJ) to determine the building, HVAC, plumbing, electrical...

To account for the frequency ranges and differing measurement needs as described in 1.1, this document provides construction guidance focused on two applications: a) At 1 GHz and below, the test site can be either an open-area test site (OATS) or a semi-anechoic chamber (SAC); b) At 1 GHz and above, the test site can be an OATS with absorber material on a portion of the ground plane, a SAC with absorber on a portion of the ground plane, or a SAC with absorbers on all conductive surfaces; the latter test site is called a fully anechoic room (FAR). Common construction techniques are also described that apply for all the above test facilities.