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A novel electromagnetic structure, sine waveguide, is introduced. Its electromagnetic characteristics at terahertz range will be reported in this paper. From our calculations, this electromagnetic structure possesses quite low transmission loss compared to the rectangular waveguide. So it can be regarded as a good terahertz wave transmission line. As a periodical structure, it possesses filter characteristics,...
The design and simulated performance of a traveling-wave tube (TWT) constructed by combining a folded-waveguide (FW) slow-wave circuit with arrays of 2-D photonic crystals (PhC) are presented. Numerical results reveal that the Pierce interaction impedance of the FW circuit with PhCs is similar to the circuit without PhC arrays. The gain, output power, and efficiency of TWTs with and without PhCs are...
In this paper, the electromagnetic scattering from a conducting circular cylinder coated with an elliptic dielectric cylinder is derived rigorously by using the mode-matching technique. The effects of dielectric loss on scattering cross section are presented here by numerical techniques.
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