Sub-millimeter Wave Propagation Characteristics in a Semiconductor slab Periodically Loaded with Magnetized Solid-State plasma

在室温和液氮温度下，对周期性加载n-InSb棒作为固体等离子体材料的1 mm厚介质波导的70 GHz毫米波传播特性进行了实验研究。将实验观察到的特性与FDTD分析得到的理论特性进行了比较。理论和实验之间有很好的定量一致性。结果表明，该结构是一种带阻滤波结构，其滤波特性可随等离子体密度和/或等离子体分布的变化或横向磁场的变化而很大程度地控制。实验还使用了526千兆赫的亚毫米波，使用了0.125毫米厚的介质导轨。对等离子体周期结构的毫米波和亚毫米波辐射特性进行了实验和理论研究。结果表明，辐射的大小和方向在很大程度上取决于外加的横向磁场。类似的等离子体周期结构在横向磁场中反射亚毫米波的研究也在进行中。对加载固体磁等离子体薄片的毫米波和亚毫米波像导中TE模的传输进行了FDTD分析。结果表明，传输功率分布存在位移的可能性。在70 GHz毫米波和526~671个亚毫米波频率下的实验结果与相应的理论结果相一致。证明了在70 GHz处存在Y型环行器的可能性。

Experimental studies were carried out on 70 GHz millimeter wave propagation characteristics of a dielectric guide of 1 mm thickness periodically loaded with n-InSb rods as solid plasma material both in room temperature and in liquid-nitrogen temperature. The experimentally observed characteristics were compared with theoretical ones obtained with FDTD analysis. Good quantitative agreements were seen between the theory and the experiments. The results show that the above-mentioned structure works as a band-rejection filter, and that its filter characteristics can be largely controlled with the variation of the plasma density and/or plasma distribution, or by the variation of a transversely applied magneic field. Experiments were also carried out with 526 GHz submillimeter wave using a dielectric guide of 0.125 mm thickness. Obtained results again showed good agreements with theoretical predictions.Millimeter wave and sub-millimeter wave radiation characteristics from a plasma periodical structure were also studied experimentally and theoretically. The results revealed that the magnitude and the direction of the radiation largely depend upon the applied transverse magnetic field. Studies on the reflection of sub-millimeter wave by a similar plasma periodic structure in a transversely applied magnetic field are also under way.An FDTD analysis was carried out on a TE mode propagation in millimeter wave and sub-millimeter wave image guide loaded with a thin solid magnetoplasma slab. Results show a possibility of displacement of the propagation power distribution. Experimental results at 70 GHz millimeter wave and 526 to 671 sub-millimeter wave frequencies were in agreement with the corresponding theoretical ones. Possibility of an Y-type circulator was demonstrated at 70GHz.