Figure 1. Left: model of the steel lattice mast with FM dipoles located close to the ladder (first two configurations). Right: model of the steel pole with FM dipoles located on the steel platform (last two configurations). From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 8. SAR values in the vertical cross section in the middle of the human model for the exposure on the steel lattice mast with 4 dipoles (left) and close to the steel pole with 2 dipoles (right). The scale is normalized to 10 W kg<sup>−1</sup>. The squares (indicated by arrows) mark the location of the highest values of the SAR in the wrist. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 7. Comparison of the values of the electric field at the line at the height of 1.5 m above the standing point in the direction from the FM antennas to the human model for the configuration with two dipole antennas. The values are presented with different lines: in one case (no man), it is calculated without the presence of the human body and in three cases with the human body located on at different distances from the FM antennas. The position of the human body is marked with arrows. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 6. Electric field strength in horizontal cross section of the steel pole with 4 dipole antennas 1.5 m above the ground. A: free space (without the human model), B: human model at the distance of 0.4 m from antennas, C: human model at the distance of 0.6 m from antennas, D: human model at the distance of 1.1 m from antennas. The scale is normalized to 1 kV m<sup>−1</sup> and shown in logarithmic scale. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 5. Electric field strength in horizontal cross section of the steel pole with 2 dipole antennas 1.5 m above the ground. A: free space (without the human model), B: human model at the distance of 0.4 m from antennas, C: human model at the distance of 0.6 m from antennas, D: human model at the distance of 1.1 m from antennas. The scale is normalized to 1 kV m<sup>−1</sup> and shown in logarithmic scale. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 4. Comparison of the values of the electric field on the vertical line close to the ladder outside the steel lattice mast (i.e. in front of workers body) where the FM transmitter is located for the configuration with two dipole antennas. The values are presented with different lines: in one case (no man), it is calculated without the presence of the human body and in three cases with the human body located on the ladder at different heights above the ground. The position of the human body is marked with arrows. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 3. Electric field strength in the vertical cross section of the steel lattice mast with 4 dipole antennas. A: free space (without the human model), B: human model at the lower position (H = 2.4 m), C: human model at the middle position (H = 3.6 m), D: human model at the top position H = 4.8 m). The scale is normalized to 1 kV m<sup>−1</sup> and shown in logarithmic scale. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 2. Electric field strength in the vertical cross section of the steel lattice mast with 2 dipole antennas. A: free space (without the human model), B: human model at the lower position (H = 2.4 m), C: human model at the middle position (H = 3.6 m), D: human model at the top position H = 4.8 m). The scale is normalized to 1 kV m<sup>−1</sup> and shown in logarithmic scale. From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.
Figure 9. Safety factor S for different heights of the ungrounded model on the steel lattice mast with 4 dipoles. Safety factor for the whole body SAR<sub>wb</sub>S<sub>wb</sub> and for the maximum value of the 10 g averaged SAR<sub>10g</sub>S<sub>max 10 g</sub> show similar tendency to have the lowest value when the human model is positioned closest to the source (dipoles). From: Radiofrequency Exposures of Workers on Low-Power FM Radio Transmitters Ann Work Expo Health. 2017;61(4):457-467. doi:10.1093/annweh/wxx012 Ann Work Expo Health | © The Author 2017. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.