Abstract:

The reconfiguration characteristic of plasma antennas is studied. Firstly, the model to describe the interaction between plasma and electromagnetic waves is established by combining the Boltzmann equation with Maxwell equations. This model is calculated numerically by the finite difference time domain (FDTD) method and the correctness is validated. Secondly, the reconfiguration model of plasma antennas is established under the two dimensional cylindrical coordinate. Based on this model, the near field of plasma antennas is obtained. Also, the effect of plasma parameters on the far field radiation pattern and the impedance characteristic are simulated and analyzed. Results show that the radiation characteristics of plasma antennas change with the transformation of plasma parameters. And plasma antennas have a certain reconfiguration characteristic.