In FDTD there are two kinds of farfield results, namely antenna gain and scatterer RCS. So what's the difference between positive and negative RCS (in dB)? Is it related with energy absorption?
Malcolm White
Negative numbers in dB just mean a ratio between 1 and 0. Positive numbers mean a ratio greater than 1.
RCS is usually in dB square metres so negative dB RCS is an RCS less than 1 square metre.
Read about dB (decibels) and learn how to use them.
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Kirill Zeyde
The unit of measurement for RCS is square meters. The decibel is normalization. It may be the same as mentioned above, or it may be different.
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