Design and Implementation of a VHF Plasma Antenna

In recent years، the plasma antenna is a new technology for replacing the metal antennas that have been designed with better performance. In the steady state، the radiation pattern of a plasma antenna will be similar to the case of metallic antennas with the same form، size and performance at the same frequency and power. By sweeping the parameters in the plasma tube، we can change the operating frequency without changing in the antenna length. The most of designs have been investigated only on the basis of the practical experiment. In this paper، a step by step procedure is presented for the design and simulation of a plasma antenna andits material. Also، a new design for the coupler shows that in addition to transmit and receiving signal with the inner coupler، there is no electromagnetic interference (EMI) due to the outer shell. Based on the design procedure، the simulation and implementation of the antenna is performed and tested in VHF band. The measurement results are compatible with the simulation excellently.