Simulation of plasma filled hemispherical cavity as dielectric resonator antenna

6th International Workshop & Summer School on Plasma Physics 2014

Trenchev, G.^1 ; Kissóvski, Zh^1

Faculty of Physics, Sofia University St. Kliment Ohridski, 5 James Boucher Blvd, Sofia, Bulgaria^1

关键词: Communication technologies;    Dielectric resonator antennas;    Hemispherical cavities;    Hemispherical dielectric resonator antennas;    High radiation efficiency;    Mobile communications;    Operating characteristics;    Weakly ionized plasma;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/768/1/012008/pdf
DOI  :  10.1088/1742-6596/768/1/012008

来源: IOP

【 摘 要 】

Plasma antennas are becoming an increasingly interesting research topic because of their uncommon characteristics. They are highly configurable, can be turned on and off rapidly, and exhibit lower thermal noise compared to metal antennas. In recent years, research has been conducted on cylindrical plasma columns sustained by DC, RF or microwave field, and their application as leaky wave antennas or as regular monopole antennas. Dielectric resonator antennas (DRA) with high dielectric permittivity are known for their small size and excellent operating characteristics for modern mobile communications (WiMAX, LTE). Hemispherical dielectric resonator antennas are characterized by simple shape, high radiation efficiency and wide bandwidth. Hemispherical DRA with a low density weakly ionized plasma as dielectric material will combine the positive features of plasma and dielectric antennas, and is particularly interesting, as antennas of this type have not been studied yet. The hemispherical plasma antenna is simulated with Ansoft HFSS in the microwave S-band. Obtained radiation pattern and bandwidth show the advantages of hemispherical plasma antennas for future communication technology.