power passing splitter.Omni Antenna Communication Distance Equation

　　Set the transmission power to PT, the transmission antenna gain to GT, and the operating wavelength to λ. The receiving sensitivity is PR, and the receiving antenna gain is GR. If the distance between the receiving and transmitting antennas is R, the radio wave has the following relationship in the absence of environmental interference:

　　In the formula, L0 is the radio wave loss during propagation.

　　For example, let PT=10mW=-20dBW; PR=-50dBm=-80dBW

　　GR=GT=7dBi ; λ=0.157m (f0 =1910MHz)

　　When L0=0, R=?

　　20logR= PT - PR - 20log1/λ+ GR + GT

　　=-20+80-21.98-16.08+14=35.94dB

　　When a 1.9GHz radio wave penetrates a layer of wall, it loses approximately 10-15dB.

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