RF power density measurements for RF energy harvesting in automobile factories

This paper presents RF power density measurements carried out at an automobile manufacturing plant in the UK. This measurement campaign was carried out in order to quantify the amount of ambient RF power available within the plant. Due to the location of the plant, low power density measurements were recorded in the base-station downlink. The dominant frequencies at the plant were GSM-1800 and 3G. Average input RF power density for horizontal and vertical polarizations showed few variations in amplitude compared to the maximum hold technique for the frequency band surveyed. The measurement campaign showed that at some locations at the plant, the input RF power density for 3G mobile transmit band was more than the base-station downlink.