Method to Change the Through-Hole Structure to Broaden Grounded Coplanar Waveguide Bandwidth

Jiangmiao Zhu; Zhaotong Wan; Kejia Zhao

doi:10.3390/s23094342

Method to Change the Through-Hole Structure to Broaden Grounded Coplanar Waveguide Bandwidth

Sensors (Basel). 2023 Apr 27;23(9):4342. doi: 10.3390/s23094342.

Authors

Jiangmiao Zhu¹, Zhaotong Wan¹, Kejia Zhao²

Affiliations

¹ Faculty of Information Technology, Beijing University of Technology, Beijing 100024, China.
² National Institute of Metrology, Beijing 100029, China.

Abstract

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.

Keywords: COMSOL Multiphysics; S-parameters; broadband grounded coplanar waveguide; through-hole array.

Grants and funding

This research was funded by National key research and development program “basic scientific research conditions and major scientific instruments and equipment research and development” key special project “broadband sampling oscilloscope” (2022YFF0707104). This research was funded by National key research and development program “National Quality Infrastructure System” key special projects “research and application of key RF parameter measurement standards for microelectromechanical systems” (2022YFF0605902).