Environmental characterization of industrial fabric for SoftWearAntenna

It was observed that changes in the environmental conditions have direct effect on the electrical parameters. High relative humidity increased the loss tangent. However, keeping the relative humidity constant while decreasing temperature, it was observed to decrease the loss tangent. It seems that the amount of water in the air controls the loss tangent; Decrease in temperature with constant relative humidity condenses some of the water vapor and thus the amount of water in the air is decreased. It was noticed that relative air humidity has a strong influence on permittivity. Increase in relative humidity was seen as an increase in permittivity and vice versa. Additionally, the temperature change affected the absolute value of permittivity. At lower temperatures the permittivity had lower values than at higher temperatures when the relative humidity remained fixed. Here, the absolute amount of water in the air seemed to be connected to this behavior as well.