Enhanced THz guiding properties of curved two-wire lines

Abstract

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.

A New Analytical Method for Studying Higher Order Modes of a Two-Wire Transmission Line

“…It has been demonstrated both experimentally and numerically that two-wire waveguide can be used at THz frequency region successfully with many advantages such as no dispersion, low loss, easy fabrication, and good coupling with common THz sources [3][4][5][6][7][8]. Besides, there have been lots of work based on this type of waveguide which shows its high importance in microwave and THz frequencies [9][10][11][12][13][14]. From the point of view of physics, theoretical studies on two-wire waveguide have been based on traditional electrostatic methods, such as image method, distributed parameter theory with equivalent L and C parameters, mapping approach, and approximate field analysis [15][16][17][18][19].…”