Microwave and Wireless Communications Technology

Antenna Directivity and Gain 175

WAVEGUIDE

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DIPOLE

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Figure 9-3

Dipole element connected to a

waveguide.

ing on the application. For example, because most microwave dipoles are used to

illuminate a reflector antenna of some sort, the length of the dipole depends on the

exact illumination function required for proper operation of the reflector. Most, how-

ever, will be half-wavelength.

9-7 ANTENNA DIRECTIVITY AND GAIN

The dipole discussed in Section 9-6 illustrates two fundamental properties of the

type of antennas generally ...