ABSTRACT
The construction of typical waveguides, the applications, and the characteristics are summarized in Fig. 1. The applications of the waveguides and modes shown in Fig. 1 are as follows:
The parallel wire line is used for power lines, telephone lines, and a VHS TV feeder. In a high frequency, transmission loss is increased by radiation.
The coaxial line is used from low frequency to microwave because there is no radiation loss.
The strip line is used for small devices because it has no radiation loss and thin construction.
The microstrip line is used in low-frequency to millimeter wave components because it is easily made on a substrate as a planar circuit.
The waveguide is used for microwave and millimeter wave devices because it has small loss and is available to high power.
The ridge waveguide is available to the lower frequency of microwave and small-sized components.
