From the point of view of antenna performance evaluation, it is essential to measure the strength of E or H components near the antenna. This then makes it possible to find the current or the charge distribution along the antenna. With this as a basis, it is possible to find the radiation pattern of the antenna and its input impedance. The measurement of E, H, or S in the near field (with the phase information conserved) permits us, with some complex calculations, to find the antenna's radiation pattern in the far field. From the point of view of shielding, absorbing, or EMF attenuating materials investigations, the E, H, and S measurements are sufficient as well.

Chapter Contents:

• 3.1 E, H, and S Measurement
• 3.2 Temperature Rise Measurements
• 3.3 SAR Measurement
• 3.4 Current Measurements

Inspec keywords: antenna radiation patterns; field strength measurement; electric current measurement; loop antennas; biological effects of fields; temperature measurement

Other keywords: antenna performance evaluation; EMF measurement methods; antenna radiation pattern; EMF attenuating materials; field strength measurement; charge distribution

Subjects: Thermal variables measurement; Voltage measurement; Single antennas; Current measurement; Health Physics