Noise suppression sheet characteristics evaluation system
(For near-field, Electric wave absorption material measurement system)
Anechoic chamber is not required,　Radiation suppression ratio measurement system
(Rrs measurement system)
IEC standard No. : IEC62333-1, IEC62333-2

It can be measured without anechoic chamber.
It is compact size at 1.2m height, 60cm width, 60cm length.

* Feature
･ The measurement based on 3m-method and 10m-method is possible without anechoic chamber (0.5~26.5GHz).
･ The specimen exchange is easy because the system is vertical.
･ Attenuation can be a little, and it measure it only with the network analyzer.
･ The radiation electric wave from the measurement specimen is changed to the plane wave with a dielectric lens.
･ As the measurement in the short distance is possible, there is little attenuation, and it does notrequired the amplifier.
･ Therefore, there is little influence such as foreign waves, and anechoic chamber is not required.
･ As it can measure it by plane wave in the short distance, the measurement that followed 3m-method and 10m-method is possible by proofreading it beforehand .
･You can observe the place of the radiation of an unnecessary electric wave of the measurement sample, in far field, by moving the measurement sample in the XY stage.

*This measurement system was announced at the conference, as follows.
・ Hirosuke Suzuki, Tomio Hotchi, Masato Inoue, Shigeru Takeda
" Radiation Suppression Ratio Measurment of Noise Suppression sheet by Compact 3m Method "
paper#137 EMC Zurich 2007 24-28 Sept.2007
・ Hirosuke Suzuki, Tomio Hotchi, Masato Inoue, Shigeru Takeda
" EMI Evaluation of a Cell phone without an Anechoic Chamber "
MO-IF-3-3 EMC-in-Singapore 2008, 19-22 May 2008