In What Way Does The Dielectric Constant (dc) Of The Media Affect The Measurement?
Answer»
ELECTROMAGNETIC energy is EMITTED from all radar devices. When the emitted signal reaches a POINT where there is a change in DC, usually the media surface, some of the signal is reflected back to the transmitter.
The amount of energy that is reflected back to the transmitter is proportional to the DC of the media. A rule-of-thumb is that the value of the dielectric constant represents the percentage of energy that is reflected.
Thus a DC of eight means that eight percent of the emitted energy is reflected back to the transmitter. FUNDAMENTALLY media with a higher DC PROVIDE stronger return signals and are therefore easier to measure.