An innovative design of anechoic chamber for the EM radiation measurement at low frequencies

An innovative design of anechoic chamber is proposed, which provides a good electromagnetic (EM) performance in the test zone at the frequency range as low as 400 MHz. In contrast to the conventional designs that need either a long taper chamber or a large size rectangular chamber, such as 12m * 5m * 5m, the proposed design may potentially cut the size in half and retain the uniformity of field distribution within the test zone. The design concept, chamber structure and its investigation in terms of EM characteristics will be presented to validate the superiority of design concept.