ISSN:
1741-0444
Keywords:
Cataract formation
;
Measurement technique
;
Metal-framed spectacles
;
Microwave radiation hazards
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
Notes:
Abstract A novel measurement technique using a monopole antenna probe has been applied to a full-size, image-plane type model of a human to determine the microwave fields near the eyes and to evaluate the effect of scattering structures, such as metal-framed spectacles, on those fields. The measurement technique relies on a ‘subtraction’ technique to determine the changes in fields when a scattering structure is introduced, and allows a large number of measurements to be performed in a relatively short space of time and with a high degree of accuracy. Investigations conducted in an anechoic chamber yield angles of incidence, test frequencies and wave polarisation values that give details of shielding, enhancement and depolar-isation effects due to this particular scattering structure that appeared not to have been previously studied. It has been found that the introduction of a pair of metalframed spectacles can, in certain cases, cause an increase in field levels by up to approximately 20 dB, a significant perturbation of the incident microwave field which should be accounted for in the setting of safety standards relating to acceptable levels of incident power.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02446229
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