FDTD simulation in wireless sensor antenna application
In this paper an own developed FDTD simulation environment is employed for antenna analysis in a wireless sensor network for traffic monitoring. The analyzed antenna is part of a WSN node that is placed in the street. The node is protected by being placed in a plastic tube with a lid. Since this in-road implementation differs from the conventional use, properties of the applied commercially available antenna don’t match the ones specified by the manufacturer. For this reason it is necessary to investigate how much this specific installation influences radiation properties of the applied antenna configuration and perform parameter analysis. It is shown that the influence of surrounding material and the change of weather conditions (which are represented through the change of relative electric permittivity and specific electric conductivity) doesn’t affect significantly antenna operation in the applied design. Mounting of the antenna on PCB favorably affects matching properties of the antenna.