• Stulle, F.; Bergoz, J.; Glock, H. W.: Measurement of Coupling Impedances using a Goubau Line. In: Proceedings IBIC 2016 - Barcelona, SpainJACoW, 2017. - ISBN 978-3-95450-177-9, p. WEPG41/1-4
    http://ibic2016.vrws.de/papers/wepg41.pdf

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Abstract:
Longitudinal coupling impedances can be deduced from S-Parameter measurements performed on a Goubau Line. The Goubau Line, also known as single wire line, is a variant of the coaxial wire method. Both setups use a wire for mimicking the particle beam. Coaxial tapers at the wire ends adapt the wave impedance to the 50 􀈳 impedance of coaxial cables, sources and receivers. But for guiding the electromagnetic wave, the Goubau Line relies on the realistic boundary conditions imposed by an insulated wire instead of using a coaxial shield. Equations for the deduction of longitudinal coupling impedances are reviewed and applied to Goubau Line measurements. Goubau Line measurements and CST Studio simulations are compared, showing good agreement.