NDLI: Low-loss broadband (DC to 220 GHz) S-CPW to S-CPS transition for S-CPS coplanar probing

Content Provider	IET Digital Library
Author	Saadi, A. A. Rovira, M. Margalef Vincent, L. Lepilliet, S. Gaquiere, C. Ferrari, P.
Abstract	The practical issue of probing coplanar stripline (CPS) structures is addressed in this Letter. A compact slow-wave coplanar waveguide (S-CPW) to slow-wave CPS (S-CPS) transition was designed and fabricated in a 55 nm BiCMOS process of STMicroelectronics. The signal strips of the slow-wave CPW and slow-wave CPS have been directly connected while the ground strips have been tied together through combination of transmission lines laid out on the top metal layer of the back-end-of-line of the technology. Thanks to its flexibility, the proposed transition can be resized to match with a wide range of slow-wave CPS slot. Tested from DC to 220 GHz, the back-to-back transition structure showed insertion loss lower than 1.4 dB and return loss better than 15 dB, respectively. To the best of author's knowledge, it is the first integrated slow-wave CPW/CPS transition introduced within the mentioned mm-wave band.
Starting Page	1137
Ending Page	1139
Page Count	3
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 21, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.2377
Journal	Electronics Letters
Publisher Date	2019-08-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Back-to-back Transition Structure BiCMOS Integrated Circuit BiCMOS Process Compact Slow-wave Coplanar Waveguide Coplanar Waveguide CPS Structures Field Effect MIMIC Field Effect MMIC Frequency 0 GHz to 220 GHz Ground Strips Insertion Loss Low-loss Broadband S-CPW Microwave IC Mixed Technology Integrated Circuit Mm-wave Band Probing Coplanar Stripline Structure S-CPS Coplanar Probing S-CPS Transition Signal Strips Size 55.0 Nm Slow Wave Structure Slow-wave CPS Slot Slow-wave CPS Transition Slow-wave CPW STMicroelectronics Strip Line Component Travelling Wave Tubes Waveguide And Microwave Transmission Line Waveguide Transitions
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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