Grounded CPW with a longitudinal slot at the bottom ground for loss reduction at the sub-THz band on glass IPD
Journal
2025 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2025 - Proceedings
Start Page
46
End Page
48
ISBN (of the container)
979-833150353-6
Date Issued
2026-02-03
Author(s)
Abstract
Grounded CPW with a longitudinal slot at the bottom ground under the signal trace is proposed to reduce the loss of the transmission line at the sub-THz band. Adding a slot under the signal trace redistributes the E-field to the gaps between the signal trace and the two side-grounds. With a larger area for E-field distribution, the loss can be reduced. The wider the slot, the lower the loss in simulation and measurement. At slot widths of 40 μm and 50 μm, the losses are reduced by 37% and 40% at 140 GHz as compared with the traditional GCPW. At 300 GHz, the losses are reduced by 27% and 34%.
Event(s)
2025 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2025
Subjects
coplanar waveguide (CPW)
slot
transmission line sub-THz band
Publisher
IEEE
Type
conference paper