研究目的
Studying the radiation characteristics of an antenna with nonsymmetric current on the surface of an open gyrotropic cylindrical waveguide filled with cold magnetoplasma.
研究成果
The presence of a gyrotropic cylinder significantly affects the radiation pattern of the antenna, especially in the lower-hybrid frequency range, by shifting its lobes towards the waveguide axis. In the upper-hybrid frequency range, the influence is less pronounced. The findings are useful for designing radiation systems with controllable characteristics.
研究不足
The study is limited to specific frequency ranges of a magnetoplasma and does not explore the effects of varying the waveguide's physical dimensions extensively.
1：Experimental Design and Method Selection:
The study uses a full-wave approach based on an expansion of the total field in terms of the discrete- and continuous-spectrum waves of the waveguide.
2：Sample Selection and Data Sources:
An infinitely long cylindrical waveguide filled with a cold collisionless magnetoplasma is considered.
3：List of Experimental Equipment and Materials:
The setup involves a cylindrical waveguide and a time-harmonic source with specified electric-current density.
4：Experimental Procedures and Operational Workflow:
The radiation pattern is calculated for different azimuthal distributions of the current.
5：Data Analysis Methods:
The radiation field in the far zone is analyzed using large-argument approximation of the Hankel function and steepest-descent path integration.
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