Conductive cylindrical surface waveguides

surface waveguide;transmission line;surface waves;waveguide theory

Erickson, Katherine ; Bernhard ; Jennifer T.

关键词: surface waveguide;    transmission line;    surface waves;    waveguide theory;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/30914/Erickson_Katherine.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Cylindrical surface waveguides are extremely useful for transporting a surface wave in one dimension with low attenuation when the medium surrounding the surface waveguide has low attenuation.Additionally, surface waveguides guide a pure low-order mode with no cutoff frequency and low distortion, while higher-order modes are quickly attenuated. In this work, we develop simulations and conduct experiments to design a large-radius surface waveguide which can be measured with existing lab equipment.Additionally, we develop and examine the effects of small, simply-shaped couplers, which are highly inefficient at launching surface waves. We also measure the effects of bends on a large-radius surface waveguide (approximately 24% of a wavelength).We study the propagation of the surface wave with a surrounding medium of air and of sand, which is a lossy medium.