Fresnel Zone(pronounced 'fre-nel' the "s" is silent) The area around the visual line-of-sight that radio waves spread out into after they leave the antenna. This area must be clear or else signal strength will weaken.
Fresnel Zone is an area of concern for 2.4 GHz wireless systems. Although 2.4 GHz signals pass rather well through walls, they have a tough time passing through trees.
The main difference is the water content in each. Walls are very dry: trees contain high levels of moisture. Radio waves in the 2.4 GHz band absorb into water quite well.
This is why microwaves -- which also use the 2.4GHz band -- cook food. Water absorbs the waves, and heat from the energy cooks the food.
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »List of Free Shorten URL Services
A URL shortener is a way to make a long Web address shorter. Try this list of free services. Read More »Top 10 Tech Terms of 2015
The most popular Webopedia definitions of 2015. Read More »
The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »Computer Architecture Study Guide
This Webopedia study guide describes the different parts of a computer system and their relations. Read More »What Are Network Topologies?
Network Topology refers to layout of a network. How different nodes in a network are connected to each other and how they communicate is... Read More »