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开发了外场相关性很高的小型微波暗室,采用改进的铁氧体材料作为吸波体,同时采用双层结构提高其吸波特性.试制出低频吸波特性良好的铁氧体材料,开发出铁氧体与介电体双层结构的吸波体,在30MHz～1GHz带宽范围内得到微波暗室所需的-15dB以下的反射系数。用开发的薄型宽带双层结构吸波体试制了小型微波暗室(7m×3m×3m),与外场试验进行了比较。结果表明,两者实测环境衰减特性完全一致,误差小,重复性好。
A small microwave anechoic chamber with high correlation in the field was developed, an improved ferrite material was used as the absorber, and a double-layer structure was used to improve its absorbing properties. A ferrite material with good low- Developed the ferrite and dielectric double-layer structure of the absorber, in the 30MHz ~ 1GHz bandwidth microwave anechoic chamber below the required -15dB reflection coefficient. A small microwave anechoic chamber (7m × 3m × 3m) was fabricated by using the developed thin broadband double-layer structure absorber, which was compared with the field test. The results show that the measured environmental attenuation characteristics of the two are exactly the same, the errors are small and the repeatability is good.