Lees, H.Headland, D.Withayachumnankul, W.2022-12-132022-12-132022International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 2022, vol.2022-August, pp.1-297817281942712162-20272162-2035https://hdl.handle.net/2440/137064All-silicon substrateless waveguides offer exceptionally low-loss and low-dispersion for integrated terahertz systems. On this platform, we present a scheme for realising broadband arbitrary ratio power division. Effective medium techniques are employed to generate power division with ratios from 50%/50% to 95%/5% across the 220–330 GHz band with average efficiency above 88%.en©2022 IEEEConference paper10.1109/irmmw-thz50927.2022.98955652022-12-13625286Lees, H. [0000-0002-1741-175X]Headland, D. [0000-0003-1527-180X]Withayachumnankul, W. [0000-0003-1155-567X]