High Power Multipactor Suppression in X-Band Waveguide

A. Gregory, Z. C. Shaw, D. Wright, J. Mankowski, J. Dickens, A. Neuber

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The multipactor effect is detrimental in space-based RF systems through detuning, heating, and causing permanent component damage. Studying thresholds and suppression of multipactor utilizing surface geometries in structures akin to WR-90 waveguide are of specific interest in the presented work. Operating in the dominant TE10 mode, a copper stepped impedance transformer transitions the waveguide to a 1.5 mm height, providing a frequency-gap product conducive for multipactor ignition. The stepped impedance transformer housing is designed as a plug-and-play system, allowing for quick swapping different stepped impedance transformer heights or materials. Input power is injected into the test gap from a coaxial magnetron, operating at 9.4 GHz with a peak power of 250 kW and 2.5 μs pulse width.The setup will enable the measurement of base thresholds for a machined and polished copper surface (material that has undergone a simple cleaning process only), as well as thresholds for multipactor suppression geometries. The testing apparatus details, including the phase-sensitive diagnostics, are presented

Original languageEnglish
Title of host publication2021 IEEE Pulsed Power Conference, PPC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665433471
StatePublished - 2021
Event2021 IEEE Pulsed Power Conference, PPC 2021 - Denver, United States
Duration: Dec 12 2021Dec 16 2021

Publication series

NameIEEE International Pulsed Power Conference
ISSN (Print)2158-4915
ISSN (Electronic)2158-4923


Conference2021 IEEE Pulsed Power Conference, PPC 2021
Country/TerritoryUnited States


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