Sensors, Vol. 23, Pages 4342: Method to Change the Through-Hole Structure to Broaden Grounded Coplanar Waveguide Bandwidth

Sensors, Vol. 23, Pages 4342: Method to Change the Through-Hole Structure to Broaden Grounded Coplanar Waveguide Bandwidth

Sensors doi: 10.3390/s23094342

Authors: Jiangmiao Zhu Zhaotong Wan Kejia Zhao

A grounded coplanar waveguide (GCPW), as a millimeter wave special transmission line, can be used to calibrate broadband oscilloscope probes. A method to change the through-hole structure to widen the GCPW is investigated in this paper. The effect of the through-hole array on the band-width of the GCPW is investigated and verified using COMSOL Multiphysics simulation software. Finally, the S-parameters of the fabricated GCPWs are measured by a vector network analyzer, and the results show that they have an insertion loss > −3 dB and return loss < −10 dB in the frequency range of DC to 60 GHz, which satisfies the design requirements.