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By National Council on Radiation Protection and Measurements

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Read or Download A Practical Guide to the Determination of Human Exposure to Radiofrequency Fields : Recommendations of the National Council on Radiation Protection A (NCRP Report No. 119) PDF

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Additional resources for A Practical Guide to the Determination of Human Exposure to Radiofrequency Fields : Recommendations of the National Council on Radiation Protection A (NCRP Report No. 119)

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Since the magnitude of the reflected wave is smaller than the magnitude of the incident wave, there are no nodes. There are, however, maxima and minima that occur a t specific values of z. The maximum values are spaced one-half wavelength apart, and the minimum values are also spaced one-half wavelength apart. 21. An i m p r t a n t quantity called the standing-wave ratio (often designated by s) is defined as the ratio of the maximum value of the sinusoidal magnitude of a wave a t any position to the corresponding minimum value a t any position.

BASIC CONCEPTS field, E, H or k, is parallel to the long axis of the body. The polarization is called E polarization, if E is parallel to the long axis, H if H is parallel to the long axis and K if k is parallel to the long axis of the body. 30. 30. Illustration of the definition of polarization of the incident fields with respect to an irradiated object. 31. Definition of polarizationsfor objectsthat do not have circular symmetry about the long axis. 3 DOSIMETRY 1 55 soid has three semiaxes with lengths a, b and c, where a > b > c.

12, the magnitude of the phase velocity is equal to the distance traveled Az divided by the time it took to travel the distance Az: 28 / 2. 12. A traveling wave at two instants of time, tl and t p Fig. 13. The time variation of an electric field at a point in space. A detector fixed a t one point in space would be subject to a function that oscillated with time as the wave passed by. This is similar to an individual standing on the beach and watching a wave go by. The value of the crest of the wave is called the peak value or amplitude of the wave.

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