17 Microwave Applicators
Radiofrequency and microwave energy can be transferred through space by simple propagation between a transmitter and a receiver or they can be guided through some form of channel. Common channels include transmission lines and wave-guides. Transmission lines will be discussed in more detail later in Chapter 26; however it is appropriate to explore the properties of wave guides here.
17.1 Wave-Guides
In general, a wave-guide consists of a tube of uniform cross section through which light may travel. Light is an electro-magnetic wave which can travel very long distances very fast (Metaxas and Meredith 1983, Meredith 1994, Cronin 1995). Radio waves, microwaves and visible light waves are commonly used for data communication. ...
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