Architecture of Exposure Systems in the Range of the Microwaves for Biological Applications

Great effort is now devolved to the study of the biological effects induced by exposure to the electromagnetic fields. Using flat strip lines and slotted cables, we realised an emitting system to irradiate a spatial region with opportune sizes and shapes. The first system provides the use of a flat strip line 8 m long, supplied by a microwave signal at the frequency in the range 900-960 MHz to reproduce a typical frequency range used by the TACS-GSM radio mobile systems. The second system, provides the use of a slotted cable 6 m long, supplied by the same microwave signal. The effective electric field emitted has been measured in a box close to the emitting system. The analysis shows that: most of the values, 88.5%, measured close to the flat strip line in a total volume whose dimensions are 800times20times6 centimetres are distributed in the range of level 1,6divide3,0 V/m; also most of the values, 77.0%, measured close to the slotted cables in a total volume whose dimensions are 600times6times10 centimetres are distributed in the range of level 1,0divide3,0 V/m. Then, the e. e. f. values produced by the strip line are distributed more uniformly than that of the slotted cable in a wider volume.