Bandwidth Extension of GSCPW-to-Waveguide Transition in Multi-Layer Dielectric Substrate by Corrugation Structures in THz Band

This paper proposes the bandwidth extension of a grounded suspended coplanar waveguide (GSCPW)-towaveguide transition in a multi-layer dielectric substrate by use of corrugation structures in the THz band. A rectangular patch element is used to transmit to the waveguide. Concurrently, the corrugation structures are applied at the edges of the aperture on the middle layer to improve the transmission characteristics and extend the bandwidth. The bandwidths of S
11
below -10 dB and S
21
higher than -3 dB of the proposed multi-layer GSCPWto-waveguide transition were 58.9 GHz and 52.8 GHz, respectively. The corrugation structures can extend the bandwidth up to 12.2% compared to the transition without corrugation.