Various usages of anechoic box for EMI design of electronics
Anechoic box can help EMI design of electronics over the development period.
Various usages of anechoic box to design EMI characteristics of electronics are introduced.
Features of typical tools for EMI design, and solutions with anechoic box are presented in the table.
|Typical tool for EMI design||Advantage||Disadvantage||Solution using anechoic box for left disadvantage|
|EMI rule checker||
||EMI characteristics of TEG that does not meet the rule can be measured with low cost.|
|Near field scanner||
||Correlation between far field and near field can be measured readily.|
|Electromagnetic field simulator||
||In recent year, there is a trend which aims to build design environment for zero trial, but it is not easy. First of all, it is considered necessary to stack a number of result comparison of the simulation and measured in the far field of primitive elements. Anechoic box with low cost is very useful.|
||Precompliance test with anechoic box minimizes the time and cost to use anechoic chamber in compliance test.|
Anechoic box is one of the very useful tool for EMI design of electronics, as shown in above table.
In summary, anechoic box can:
- Help to expand the rules in EMI rule checker.
- Validate correlation between far field and near field.
- Minimize the time and cost to use anechoic chamber in compliance test.
|Electromagnetic anechoic box|
|EMI measurement antenna|
|Jigs to mount antenna and EUT|
|Others(PC, I/F modules, cables, etc)|
|Signal analyzer [MSA538E]|
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