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Design, simulation, and fabrication of broadband coaxial matched loads for the frequency range from 0 to 110 GHz

Published online by Cambridge University Press:  12 March 2014

Andreas Tag ,
Jens Leinhos ,
Gerd Hechtfischer ,
Martin Leibfritz  and
Thomas Eibert
Andreas Tag*
Affiliation:
Institute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 9, 91058 Erlangen, Germany
Jens Leinhos
Affiliation:
Rohde & Schwarz GmbH & Co. KG, Mühldorfstrasse 15, 81671 Munich, Germany
Gerd Hechtfischer
Affiliation:
Rohde & Schwarz GmbH & Co. KG, Mühldorfstrasse 15, 81671 Munich, Germany
Martin Leibfritz
Affiliation:
Rohde & Schwarz GmbH & Co. KG, Mühldorfstrasse 15, 81671 Munich, Germany
Thomas Eibert
Affiliation:
Insitute for High-Frequency Engineering, Technische Universität München, Arcisstrasse 21, 80333 Munich, Germany
*
Corresponding author: A. Tag Email: [email protected]
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Abstract

Combining a theory for reflection-free termination of coaxial lines together with a novel manufacturing method results in 1-mm coaxial matched loads with an excellent absorption behavior over the frequency range from 0 to 110 GHz. Three different electromagnetic (EM) simulation approaches verify the capability of these matched loads to achieve reflection coefficients smaller than −43 dB over the entire frequency range. Matched loads with a maximum reflection coefficient of only −32 dB have been produced. An excellent performance was achieved by exponentially tapering the outer conductor over the region of a coaxial ceramic substrate coated by a thin-film resistance and by compensation for EM wave propagation inside the resistive coating.

Keywords

Microwave measurementsModelingSimulation and characterizations of devices and circuits
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 3-4: European Microwave Week 2013 , June 2014 , pp. 297 - 304
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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