Derivations of Relationships among Field Strength, Power in Transmitter-

[ANTRF]

Derivations of Relationships among Field Strength, Power in Transmitter-Receiver Circuits and Radiation Hazard Limits

Power in space couples into circuits, and vice versa, via antennas which couple energy between these two media by matching their (generally different) impedances. The relationships among the power in a circuit, the incident or radiated power in space around the circuit, and the characteristics of an antenna that couples the two are completely deterministic and are well-understood. Unfortunately, these relationships are often presented in engineering texts, data reports, data analyses and automated conversion calculators merely as formulae without references to sources of their derivations. While the use of formulae is an expedient way to perform calculations, a formula-based approach to an analysis can lead to calculation errors when the numerical inputs may not be legitimately used in that formula. This problem occurs, for example, when the origins of data inserted into a formula do not correlate to the assumptions behind the derivation of the formula.
This publication seeks to address the lack of a published comprehensive set of derivations of the relationships among power in space, power in circuits, and the characteristics of antennas that couple between them. It provides, in a form that may be easily referenced, derivations of the relationships between these physical quantities.


B.R.

ANTRF

[tt1dks]

this basic item can help us alots
thanks