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Ultra-wideband coplanar waveguide-to-asymmetric coplanar stripline transition from DC to 165 GHz

Published online by Cambridge University Press:  08 June 2018

Yunfeng Dong*
Affiliation:
Electromagnetic Systems Group, Department of Electrical Engineering, Technical University of Denmark, Oersteds Plads Building 348, 2800 Kgs. Lyngby, Denmark
Tom K. Johansen
Affiliation:
Electromagnetic Systems Group, Department of Electrical Engineering, Technical University of Denmark, Oersteds Plads Building 348, 2800 Kgs. Lyngby, Denmark
Vitaliy Zhurbenko
Affiliation:
Electromagnetic Systems Group, Department of Electrical Engineering, Technical University of Denmark, Oersteds Plads Building 348, 2800 Kgs. Lyngby, Denmark
*
Author for correspondence: Yunfeng Dong, E-mail: yundon@elekro.dtu.dk

Abstract

This paper presents an ultra-wideband coplanar waveguide (CPW)-to-asymmetric coplanar stripline (ACPS) transition based on aluminum nitride (AlN) substrate. The concepts of designing CPW, ACPS, and CPW-to-ACPS transition are explained. In order to suppress parasitic modes, vias going through AlN substrate are added along the ground traces. The signal trace is tapered out and chamfered to reduce the reflection caused by the termination of ground trace. The CPW-to-ACPS transition is designed, fabricated, and measured in a back-to-back configuration. The fabricated CPW-to-ACPS transition can provide a bandwidth of 165 GHz with an associated insertion loss of 3 dB.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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