I am often surprised at the number and stature of engineers and researchers in the wireless industry who believe this to be true, though. The received power, P r, then goes up by the square of the wavelength! Clearly it is always desirable to use as low a frequency as possible, correct?Īt least it's evident that propagation is frequency dependent!
It is evident from Equation (1) that, all other variables held constant, as the transmission frequency is reduced, the wavelength, λ, increases. Λ - The wavelength of the carrier (i.e., the center frequency of the radiated signal)ĭ - The distance between the transmitting and receiving antennas. G t - The gain of the transmitting antenna. Where the (λ/4πd) 2 term is sometimes referred to as the path loss or free space loss. This article is available in PDF format for easy printing
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