fspl
Losses in the path of signal propagation in free space.
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Arguments
Input arguments
# R — signal propagation distance, m
+
vector
Details
Signal propagation distance in meters, given as a real length vector .
| Типы данных |
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# lambda — wavelength, m
+
vector
Details
The wavelength in meters, given as a real length vector . Wavelength is the propagation speed divided by the frequency of the signal.
| Типы данных |
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Examples
Calculation of losses on the signal propagation path in free space
Details
We calculate the losses along the signal propagation path in free space (in dB) of the radar signal with the frequency 10 GHz at a distance 10 km.
import EngeePhased.Functions: fspl
fc = 10.0e9
c = 299792458.0
lambda = c / fc
R = 10e3
L = fspl(R, lambda)132.44778322188336Additional information
Losses on the signal propagation path in free space
Details
Losses on the signal propagation path in free space, measured in dB, are
This formula assumes that the target is in the far zone of the transmitting element or antenna array. In the near zone, the loss formula on the signal propagation path in free space is invalid and may lead to less losses 0 dB, which is equivalent to signal amplification. For this reason, for range values losses are set equal 0 dB.