Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Low cost precision reflectometer
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2006 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This Master Thesis contains an evaluation of the six-port reflectometer (SPR), an alternative method for measuring reflection. This technique allows the measurement ofcomplex reflection using only scalar detectors. Obtaining both amplitude and phase information gives the possibility to make corrections for systematic errors such as feeder cable loss and directivity error.

The report contains a literature study including the six-port reflectometer technique as well as a historical overview of reflection measurement techniques. Further more it contains simulation results of parts of the design as well as of the complete system. The calibration algorithm of the SPR is presented step by step with an improvement made in order to reduce the number of calculations. Measurement results of the reflection measurements are presented as a comparison to the result obtained from a network analyzer.

The simulations showed high accuracy when simulating variations in the return loss of the loads as well as variations of the input signal frequency. The simulations also gave some indications on how to affect the accuracy of the reflection measurements.

Measurements showed high accuracy when measuring unknown loads with changing return loss. Variations of the input power also yielded a good result. Measurements performed with the input signal frequency variated failed to show the same high accuracy as in the simulations. However, there are some improvements suggested to increase the accuracy in a presumptive product.

Abstract [sv]

Det här examensarbetet innehåller en utvärdering av sexports reflektometern (SPR), en alternativ metod för att mäta reflektion. Den här tekniken tillåter mätning av komplex reflektion med hjälp av enbart skalära detektorer. Erhållandet av både amplitud och fas ger möjligheten att kompensera för systematiska fel som kabelförluster och direktivitetsfel.

Rapporten innehåller en litteraturstudie som omfattar sexports reflektometertekniken samt en historisk översikt av olika tekniker för att mäta reflektion. Rapporten innehåller även simuleringsresultat från enskilda delar av designen samt från hela systemet. Kalibreringsalgoritmen presenteras steg för steg tillsammans med en förbättring som gjorts för att minska antalet beräkningar. Mätresultaten från reflektionsmätningarna presenteras som en jämförelse med resultaten från en nätverksanalysator. Simuleringarna visade hög noggrannhet under variation av lasternas reflektionsförluster och insignalens frekvens. Simuleringarna gav också en indikation på hur man kan påverka noggrannheten i reflektionsmätningarna.

Mätningarna visade hög noggrannhet vid variation av lasternas reflektionsförluster. Variationer i insignalens effekt gav också goda resultat. Mätningar genomförda med variation i insignalens frekvens resulterade inte i samma höga noggrannhet som under simuleringarna. Det finns emellertid vissa förslag på förbättringar för att öka noggrannheten i en potentiell framtida produkt.

Place, publisher, year, edition, pages
2006. , 45 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-97118ISRN: LITH-ITN-ED-EX--06/023--SEOAI: oai:DiVA.org:liu-97118DiVA: diva2:650013
Subject / course
Electrical Engineering
Supervisors
Examiners
Available from: 2013-09-19 Created: 2013-09-04 Last updated: 2013-09-19Bibliographically approved

Open Access in DiVA

fulltext(1562 kB)466 downloads
File information
File name FULLTEXT01.pdfFile size 1562 kBChecksum SHA-512
0da0dc7907de4763efb857f56b52a348adade8cb1b92ec071ad239c6df78f33c6de23fe833efcf5e4bb1ea126081e3ca819f889fc73bfb272832776384483ad8
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Busck, Fredrik
By organisation
Department of Science and TechnologyThe Institute of Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 467 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 62 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf