CHAPTER 4Transmission Lines and Impedance Matching
Transmission lines and waveguides are conduits for transporting RF energy between elements of a radio system. For example, in a typical station with a transmitter (or exciter) and a power amplifier, one transmission line carries exciter output to the amplifier input and a second line delivers transmitter output energy to the antenna. A third line may carry the incoming RF energy from a transmit/receive switch or separate receiving antenna to the station receiver. Still other lines may switch filters in and out, or pass transmitter RF through signal monitors, power meters, and other station accessories.
A good analogy for visualizing how transmission lines do their job is a forced hot water heating ...
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