Simultaneous Occupational Exposure to FM and UHF Transmitters

• Autorzy: Valic B. , Kos B. , Gajsek P.
• Języki publikacji: EN

Abstrakty

EN

Occupational exposure caused by large broadcasting transmitters exceeds current reference levels. As it is common for different radio and TV transmitters to share the location, we analysed combined exposure on a 40-m high mast. The frequency modulation (FM) transmitter, located between the 10th and 30th metre, had the power of 25 kW, whereas an ultra-high frequency (UHF) transmitter of 5 kW occupied the top 8 m of the mast. Measured and calculated values of the electric field strength exceeded the reference levels up to 10 times; however, the results for the specific absorption rate (SAR) values show that the reference levels are very conservative for FM exposure, i.e., basic restrictions are not exceeded even when the reference levels are exceeded 10 times. However, for UHF exposure the reference levels are not conservative; they give a good prediction of real exposure.

Słowa kluczowe

EN

occupational exposure; simultaneous exposure; measurements; numerical calculation; SAR; FM; UHF; FDTD

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 2012
• Tom: Vol. 18, No. 2
• Strony: 161--170
• Opis fizyczny: Bibliogr. 14 poz., tab., wykr.

Twórcy

autor

Valic B.

• Institute of Non-Ionizing Radiation, Ljubljana, Slovenia

autor

Kos B.

• Faculty of Electrical Engineering, University of Ljubljana, Slovenia

autor

Gajsek P.

• Institute of Non-Ionizing Radiation, Ljubljana, Slovenia

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