To be sufficiently lossy, RAM can be neither a good electrical conductor nor a good electrical insulator as neither type actually absorbs any power. Sections of RAM may be temporarily removed to install equipment but they must be replaced before performing any tests. To work effectively, all internal surfaces of the anechoic chamber must be entirely covered with RAM. One of the most effective types of RAM comprises arrays of pyramid shaped pieces, each of which is constructed from a suitably lossy material. The grey paint helps to protect the delicate radiation-absorbent material. Note the orange caution cones for size reference. Introduction A large drive-in RF anechoic test chamber. Many measurements in electromagnetic compatibility (EMC) and antenna radiation patterns require that spurious signals arising from the test setup, including reflections, are negligible to avoid the risk of causing measurement errors and ambiguities. The more effective the RAM, the lower the resulting level of reflected RF radiation. In materials science, radiation-absorbent material ( RAM) is a material which has been specially designed and shaped to absorb incident RF radiation (also known as non-ionising radiation), as effectively as possible, from as many incident directions as possible. ( August 2021) ( Learn how and when to remove this template message)Īn RF anechoic chamber used for EMC testing. Statements consisting only of original research should be removed. Please improve it by verifying the claims made and adding inline citations. This article possibly contains original research.
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