![]() The free space loss FSP = Ps/Pr can be computed by combining Equation 1 with equation 2 and we get…Įquation 4:FSPL = (4πd/wavelength)^2 Equation 5:FSPL = (4πdf/c)^2 The free space loss FSP equation is the ratio of transmitted power to received power so… Equation 3:FSP = Ps/Pr so that the effective power received(Pr) is proportional to the square of wavelength used and the incident power (Pd) at the antenna thus… Equation 2: Pr = Pd x (Wavelength^2/4π) Now the ability of an antenna to absorb this radiated energy depends on its apature which also depends on the wavelength of the radiation. So the power per unit area at point d (Pd) away from the source producing power (Ps) is … Equation 1: Pd = Ps x (1/4πd^2) Second Loss Effect – Antenna Apature Which means the energy per unit area away from the transmitting source is inversely proportional to the square of the distance (d) between the source and the observer. First Loss Effect – Radiation LawĮlectromagnetic waves propagate energy according to the inverse square law. There are two main effects which lead to free space loss and non of them are influenced by the frequency of the radiation which is a commonly assumed. Here we describe the mechanisms involved and provide a means to calculate signal energy at a given distance from the source. The concept of free space loss refers to the natural way radio signal energy gets weaker the further away from the radio signal source you go.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |