Question

Exercise and Homework 1: Free-Space Path Loss (rest of class) Conservation of energy is a law. At steady state, so is conservation of power - any power that goes into a region has to go out of it or be dissipated within it. (In general, power can also be stored, but one of the assumptions of "steady state" is that power is being stored at the same rate that it's being released.) 1. Assume you have something that radiates power equally in all directions (spherical symmetry). Assume also that it is in a lossless medium- power is not dissipated as it travels through space. Free space path loss is the reduction in radiation power density with distance. Assuming the wave spreads out spherically, evenly in all directions, what must be the equation for radiation path loss? 2. Use MATLAB to plot free space path loss vs. distance in dB (loss is referenced to initial signal strength).

Antenna Theory & Design question

Answer 1

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