RANGE CALCULATION Description - Microchip …

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9144C-RKE-07/15DescriptionFor restricted-power UHF* communication systems, as defined in FCC Rules and Regula-tions Title 47 Part 15 Subpart C intentional radiators* , communication RANGE capability is a topic which generates much interest. Although determined by several factors, communica-tion RANGE is quantified by a surprisingly simple equation developed in 1946 by Friis of Denmark. This paper begins by introducing the Friis Transmission Equation and examining the terms comprising it. Then, real-world-environment factors which influence RF commu-nication RANGE and how they affect a Link Budget* are investigated.

Range Calculation [APPLICATION NOTE] 3 9144C–RKE–07/15 Higher received-power levels are represented by decibel numbers which are less negative.

  Ranges, Calculation, Range calculation