Asymmetric Ultra-Wideband Microstrip-to-Coplanar Stripline Transition

Gwan Hui Lee; Wahab Mohyuddin; Hyun Chul Choi; Kang Wook Kim

doi:10.1109/LMWC.2018.2822723

Asymmetric Ultra-Wideband Microstrip-to-Coplanar Stripline Transition

Gwan Hui Lee, Wahab Mohyuddin, Hyun Chul Choi, Kang Wook Kim

School of Electronics Engineering

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

A new design method for an asymmetric microstrip-to-coplanar stripline (CPS) transition based on the analytical electromagnetic model is presented. The cross section at each stage of the transition is analyzed through conformal transformation, and the corresponding line impedance is calculated. Then, the ground linewidth on the substrate bottom is adjusted to form an optimal Klopfenstein impedance taper. To demonstrate the design method, a transition between a 50-Ω microstrip line and a high-impedance CPS line (147 Ω) was implemented. Good transition performance with more than 10-dB return loss and less than 1-dB insertion loss was obtained for frequency ranges of 6-40 GHz.

Original language	English
Pages (from-to)	386-388
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	28
Issue number	5
DOIs	https://doi.org/10.1109/LMWC.2018.2822723
State	Published - May 2018

Keywords

Asymmetric
balun
coplanar stripline (CPS)
Klopfenstein
microstrip line (MSL)
Schwarz-Christoffel
transition

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10.1109/LMWC.2018.2822723

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title = "Asymmetric Ultra-Wideband Microstrip-to-Coplanar Stripline Transition",

abstract = "A new design method for an asymmetric microstrip-to-coplanar stripline (CPS) transition based on the analytical electromagnetic model is presented. The cross section at each stage of the transition is analyzed through conformal transformation, and the corresponding line impedance is calculated. Then, the ground linewidth on the substrate bottom is adjusted to form an optimal Klopfenstein impedance taper. To demonstrate the design method, a transition between a 50-Ω microstrip line and a high-impedance CPS line (147 Ω) was implemented. Good transition performance with more than 10-dB return loss and less than 1-dB insertion loss was obtained for frequency ranges of 6-40 GHz.",

keywords = "Asymmetric, balun, coplanar stripline (CPS), Klopfenstein, microstrip line (MSL), Schwarz-Christoffel, transition",

author = "Lee, {Gwan Hui} and Wahab Mohyuddin and Choi, {Hyun Chul} and Kim, {Kang Wook}",

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PY - 2018/5

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AB - A new design method for an asymmetric microstrip-to-coplanar stripline (CPS) transition based on the analytical electromagnetic model is presented. The cross section at each stage of the transition is analyzed through conformal transformation, and the corresponding line impedance is calculated. Then, the ground linewidth on the substrate bottom is adjusted to form an optimal Klopfenstein impedance taper. To demonstrate the design method, a transition between a 50-Ω microstrip line and a high-impedance CPS line (147 Ω) was implemented. Good transition performance with more than 10-dB return loss and less than 1-dB insertion loss was obtained for frequency ranges of 6-40 GHz.

KW - Asymmetric

KW - balun

KW - coplanar stripline (CPS)

KW - Klopfenstein

KW - microstrip line (MSL)

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JO - IEEE Microwave and Wireless Components Letters

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Asymmetric Ultra-Wideband Microstrip-to-Coplanar Stripline Transition

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Keywords

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