802.11 Basics and RF Fundamentals

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Community Manager

Attached is a presentation from Airheads Vegas 2012 and Airheads Bangkok 2012, summarizing 802.11 basics. An earlier version was also presented at Airheads Dallas 2011.  


For more details, take a look at the 4 part online video series on RF fundamentals below. 

Components: Transmitter, Antenna, Receiver, Isotropic Radiator, Intentional Radiator, EIRP

Characteristics: Amplitude, Frequency, Wavelength, Polarization

Behavior: Wave Propagation, RF Power, Path Loss, dBm vs. mW, Absorption, Reflection, Scattering, Diffraction, Multipath, In/Out Phase, Attenuation, Amplification

802.11 Overview: 2.4 and 5GHz channels, 802.11h (DFS & TPC), 11a/b/g vs. 11n, MIMO



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Back to basics: DSS with 802.11 Prime and 802.11b by RevolutionWiFi @ NSA Podcast Show




Great blog entry on RF basics and more: 


Part 1

RF Basics

So, what types of antennas are there and what are the differences?

What blocks WiFi?


Part 2

Understanding RF Interference and What It Does to WiFi

Mapping Your Wireless Landscape

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