Coupling Properties of a Conical Tungsten-Wire Waveguide in the Terahertz Frequency Range

We present experimental and simulation studies of enhanced terahertz (THz) guiding properties of curved two-wire lines for several surface conditions. When a THz-wave propagates through curved two-wire lines, a rough wire surface with dielectric coating contributes to a lower bending loss compared to a smooth or rough wire surface without coating. Dielectric coating and rough surface confine the THz field to the wire surface making the bending loss low. The guiding property at a curve depth of 30 mm of a rough wire surface with 25-μm-thick coating is improved by 34% compared to that of a smooth wire without coating. Furthermore, computer simulation technology (CST) software visually shows the bending loss as same as the experimental studies.

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Characteristics of THz Pulse Propagation on Teflon Covered Two-Wire Lines

Jeon

2015

Journal of the Optical Society of Korea

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We report efficient direct coupling of THz dipole antenna pulses onto air spaced two-wire transmission lines and Teflon covered two-wire lines. The air spaced two-wire lines show TEM mode propagation with very small group velocity dispersion (GVD) and relatively low attenuation. The Teflon covered two-wire lines showed comparatively much higher attenuation and GVD. However, the Teflon covered two-wire lines show a very good guiding property when the lines are curved. Although the lines are circled only 5.0 cm in diameter, there is no additional attenuation compared to straight the lines.

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Coupling Properties of a Conical Tungsten-Wire Waveguide in the Terahertz Frequency Range

Cited by 4 publications

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Enhanced THz guiding properties of curved two-wire lines

Characteristics of THz Pulse Propagation on Teflon Covered Two-Wire Lines

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