Holeless Low Loss Terahertz Transmission Line

This paper proposes a hole-less, low-loss terahertz transmission line, constructed of a conductor backed-CPW (CBCPW) and periodically branched edge, operating within a bandwidth of DC-500 GHz. The wave leakage is constrained by the periodic stubs of the transmission line, thus reducing the overall loss. It propagates the TEM mode ranging from DC to 500 GHz. The impedance is set at 50 ohms, eliminating the need for additional transition and streamlining the fabrication process. A prototype spanning from DC to 500 GHz with a total length of 2 mm was simulated for validation purposes. The results demonstrate that the
$\vert \mathrm{S}_{11}\vert$
is below -20 dB, while the comprehensive
$\vert \mathrm{S}_{21}\vert$
is roughly around -7.45 dB.