In general, the path loss, as a deterministic parameter, is defined in the following way. A transmitter transfers Pj (W) into the port of an antenna with gain Gx, and the perfectly co-polarised receiving antenna with gain Gr delivers power Pr (W) into a perfectly matched load at its port. The path loss L is defined from the Friis transmission equation.
Appendix A: Field strength and path loss, Page 1 of 1
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