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Passive Intermodulation and Corona Discharge for Microwave Structures in Communications Satellites

Vicente Quiles, Carlos Pascual (2005)
Passive Intermodulation and Corona Discharge for Microwave Structures in Communications Satellites.
Technische Universität
Ph.D. Thesis, Primary publication

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Item Type: Ph.D. Thesis
Type of entry: Primary publication
Title: Passive Intermodulation and Corona Discharge for Microwave Structures in Communications Satellites
Language: English
Referees: Hinrichsen, Prof.Dr. V. ; Gimeno Martinez, Prof.Dr. B.
Advisors: Hartnagel, Prof.Dr. H. L.
Date: 24 August 2005
Place of Publication: Darmstadt
Date of oral examination: 29 June 2005
Abstract:

As times goes by, satellite communication systems demand for higher component integration. Besides, an increase of services is also required, what implies the use of larger bandwidths. To achieve these objectives, the size of microwave devices on the one hand incessantly decreases whereas, at the same time, the power levels increase. Both trends lead to a higher electromagnetic field density inside the components. This development leads to serious problems with respect to RF breakdown (Corona Discharge and Multipactor) caused by high electromagnetic field densities, and cross-talking interference (Passive Intermodulation) due to bandwidth requirements. In this work, Passive Intermodulation (PIM) at waveguide flanges and Corona Discharge in microwave components, e.g. filters, are investigated. In both cases, theoretical research is developed in order to understand the physical mechanisms lying behind both phenomena. Results are presented which are useful for providing particular guidelines to avoid both effects in Sat-Com applications. Systematic experimental research for both phenomena is also presented along the thesis.

Alternative Abstract:
Alternative AbstractLanguage

Moderne Kommunikationssysteme für Satelliten stellen immer höhere Anforderungen an die Kompaktheit. Zusätzlich werden immer mehr Dienste mit einer stetig steigenden Bandbreite benötigt. Um diese Anforderungen zu erfüllen werden die Abmessungen immer weiter verringert während die Signalleistungen immer weiter erhöht werden. Diese Entwicklungen führen zu hohen Dichten der elektromagnetischen Felder innerhalb der Komponenten und führen daher zu Problemen wie RF Durschlag (Corona Dicharge und Multipactor) und Nebensprechen aufgrund der hohen Bandbreiten. In dieser Arbeit werden Passive Intermodulation an Hohlleiterübergängen und Corona Discharge in Mikrowellenkomponenten, wie z.B. Filtern, untersucht. In beiden Fällen werden die theroretischen Grundlagen für die zugrundeliegenden physikalischen Mechanismen entwickelt. Die erarbeiteten Ergebnisse geben wertvolle Richtlinien für die Vermeidung der genannten Effekte in Anwendungen der satellitenkommunikation. Zusätzlich werden systematische experimentelle Forschungsarbeiten für beide Effekte in dieser Arbeit präsentiert.

German
URN: urn:nbn:de:tuda-tuprints-5988
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology
Date Deposited: 17 Oct 2008 09:22
Last Modified: 08 Jul 2020 22:52
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/598
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