Antenna Measurements
The majority of antenna measurements lie within two basic categories: impedance measurements and pattern measurements. The first category deals with one of the most important antenna parameters-the input impedance. The second category is a very broad and equally important one, with many subcategories, such as measurements of beamwidth, minor lobe level, gain, and polarization characteristics. Measurements of efficiency and noise may also be desired in some instances. As discussed in sec. 7.8, the antenna may affect the noise level of a receiving system in special cases. Consequently, the technique of antenna noise measurements is especially important in the lower atmospheric noise region of about 1 to 10 GHz. Therefore, the basic technique of antenna noise measurement and the effect of antenna noise on overall receiving system noise are described in the present chapter.
Antenna Measurements, Page 1 of 2
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