This is a highly technical (but very readable) paper detailing the principles of electromagnetism and RF signal propagation. The paper includes an overview of Maxwell's wave equations and a derivation of the Fresnel Zone formulae from a Pythagorean representation of out-of-phase multipath signal waveforms. The paper is intended for RF communication engineers and experienced WLAN designers who seek to understand the underlying physics behind 802.11 wireless network.
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