Design of Transfer Impedance Measurement Fixture of EMI Gaskets Up to 18 GHz

Mingjie Sheng; Zhongyuan Zhou; Jinjing Ren; Yixing Gu; Yang Xiao; Qi Zhou; David Pommerenke

doi:10.1109/TMTT.2023.3253172

Design of Transfer Impedance Measurement Fixture of EMI Gaskets Up to 18 GHz

Mingjie Sheng, Zhongyuan Zhou^*, Jinjing Ren, Yixing Gu, Yang Xiao, Qi Zhou, David Pommerenke

^*Corresponding author for this work

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

Abstract

To achieve the transfer impedance measurement of electromagnetic interference (EMI) gaskets, a fixture useful up to 18 GHz is developed based on the SAE ARP1705C standard. The radial size of the coaxial section of the fixture is shaped from the perspective of its characteristic impedance and suppression of higher-order modes. Subsequently, a parametric analysis is performed to examine the sensitivity of critical dimensions, and the study analyzes the key factors affecting the voltage standing wave ratio (VSWR) of the fixture and its 50~Ω resistor. Based on the preceding analysis, two solutions are proposed to improve the VSWR: reducing the length of the 50~Ω resistor and modifying the shape of the coaxial outer conductor. The ultimate outcome of the transfer impedance measurement fixture yields a VSWR lower than 2.6:1, up to 18 GHz. The functionality of the fixture is demonstrated through the measurement of two gaskets, showcasing its practical utility in engineering applications.

Original language	English
Pages (from-to)	3874-3881
Number of pages	8
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	71
Issue number	9
DOIs	https://doi.org/10.1109/TMTT.2023.3253172
Publication status	Published - 1 Sept 2023

Keywords

Coaxial outer conductor design
electromagnetic interference (EMI) gasket
SAE ARP1705C
transfer impedance
voltage standing wave ratio (VSWR)

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2023.3253172

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title = "Design of Transfer Impedance Measurement Fixture of EMI Gaskets Up to 18 GHz",

abstract = "To achieve the transfer impedance measurement of electromagnetic interference (EMI) gaskets, a fixture useful up to 18 GHz is developed based on the SAE ARP1705C standard. The radial size of the coaxial section of the fixture is shaped from the perspective of its characteristic impedance and suppression of higher-order modes. Subsequently, a parametric analysis is performed to examine the sensitivity of critical dimensions, and the study analyzes the key factors affecting the voltage standing wave ratio (VSWR) of the fixture and its 50~Ω resistor. Based on the preceding analysis, two solutions are proposed to improve the VSWR: reducing the length of the 50~Ω resistor and modifying the shape of the coaxial outer conductor. The ultimate outcome of the transfer impedance measurement fixture yields a VSWR lower than 2.6:1, up to 18 GHz. The functionality of the fixture is demonstrated through the measurement of two gaskets, showcasing its practical utility in engineering applications.",

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author = "Mingjie Sheng and Zhongyuan Zhou and Jinjing Ren and Yixing Gu and Yang Xiao and Qi Zhou and David Pommerenke",

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AU - Sheng, Mingjie

AU - Zhou, Zhongyuan

AU - Ren, Jinjing

AU - Gu, Yixing

AU - Xiao, Yang

AU - Zhou, Qi

AU - Pommerenke, David

PY - 2023/9/1

Y1 - 2023/9/1

N2 - To achieve the transfer impedance measurement of electromagnetic interference (EMI) gaskets, a fixture useful up to 18 GHz is developed based on the SAE ARP1705C standard. The radial size of the coaxial section of the fixture is shaped from the perspective of its characteristic impedance and suppression of higher-order modes. Subsequently, a parametric analysis is performed to examine the sensitivity of critical dimensions, and the study analyzes the key factors affecting the voltage standing wave ratio (VSWR) of the fixture and its 50~Ω resistor. Based on the preceding analysis, two solutions are proposed to improve the VSWR: reducing the length of the 50~Ω resistor and modifying the shape of the coaxial outer conductor. The ultimate outcome of the transfer impedance measurement fixture yields a VSWR lower than 2.6:1, up to 18 GHz. The functionality of the fixture is demonstrated through the measurement of two gaskets, showcasing its practical utility in engineering applications.

AB - To achieve the transfer impedance measurement of electromagnetic interference (EMI) gaskets, a fixture useful up to 18 GHz is developed based on the SAE ARP1705C standard. The radial size of the coaxial section of the fixture is shaped from the perspective of its characteristic impedance and suppression of higher-order modes. Subsequently, a parametric analysis is performed to examine the sensitivity of critical dimensions, and the study analyzes the key factors affecting the voltage standing wave ratio (VSWR) of the fixture and its 50~Ω resistor. Based on the preceding analysis, two solutions are proposed to improve the VSWR: reducing the length of the 50~Ω resistor and modifying the shape of the coaxial outer conductor. The ultimate outcome of the transfer impedance measurement fixture yields a VSWR lower than 2.6:1, up to 18 GHz. The functionality of the fixture is demonstrated through the measurement of two gaskets, showcasing its practical utility in engineering applications.

KW - Coaxial outer conductor design

KW - electromagnetic interference (EMI) gasket

KW - SAE ARP1705C

KW - transfer impedance

KW - voltage standing wave ratio (VSWR)

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Design of Transfer Impedance Measurement Fixture of EMI Gaskets Up to 18 GHz

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Keywords

ASJC Scopus subject areas

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