An Isolated H-Plane Terahertz Waveguide T-Junction With Corrugated Microstrip Loads

In this letter, a broadband and isolated H-plane terahertz waveguide T-junction is presented for terahertz power combination applications. Thereinto, the high isolation characteristic is realized by inserting two corrugated microstrip loads via anti-symmetric probes. In addition, a simple and robust rectangular matching structure is utilized to achieve broadband impedance matching. The entire power divider is manufactured in three metal blocks to avoid high-loss H-plane splitting and to simplify load assembly. The measured results show that the average insertion loss is 1 dB, the input return loss is better than -15 dB, and the output isolation is above 13 dB over the frequency range of 270-400 GHz.