1-61
Figure 1-76.—Faraday rotation.
Q-59. Ferrite devices are useful in microwave applications because they possess what properties?
Q-60. Which of the two types of electron motion (orbital movement and electron spin) is more important
in the explanation of magnetism?
Q-61. The interaction between an external field and the binding force of an atom causes electrons to do
what?
Q-62. The resonant frequency of electron wobble can be changed by variation of what force?
Q-63. Rotating the plane of polarization of a wavefront by passing it through a ferrite device is called
what?
SUMMARY
This chapter has presented information on waveguide theory and application. The information that
follows summarizes the important points of this chapter.
WAVEGUIDES are the primary methods of transporting microwave energy. Waveguides have
fewer losses and greater power-handling capability than transmission lines. The physical size of the
waveguides becomes too great for use at frequencies less than 1000 megahertz. Waveguides are made in
three basic shapes, as shown in the first illustration. The wide, or "a," dimension determines the frequency
range of the waveguide, and the narrow, or "b," dimension determines power-handling capability as
shown in the second illustration. Waveguides handle a small range of frequencies both above and below
