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  • Shah, UmerKTH,Mikrosystemteknik,RF MEMS (author)

Basic Concepts of Moving-Sidewall Tuneable Capacitors for RF MEMS Reconfigurable Filters

  • Article/chapterEnglish2011

Publisher, publication year, extent ...

  • The European Microwave Association,2011
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-50164
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50164URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-271584URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:kon swepub-publicationtype

Notes

  • QC 20111213
  • Not duplicate with DiVA 461175.QC 20200422. QC 20220211
  • This paper presents for the first time MEMS tuneablefilters, where the reconfiguration of the filter is achieved bymoving the sidewalls of a 3D micromachined transmission line.The sidewalls of the transmission line are moved by MEMSelectrostatic actuators completely integrated into the groundlayers of a thick-film coplanar waveguide. Multi-step actuatorshave been utilized for achieving a tuning range of up to 2.41 forthe tuneable capacitance elements. Two different 3Dtransmission line metallization schemes and two differentconcepts for tuning the capacitive load have been investigatedfor constructing filters based on this novel tuning mechanism.Measurements of fabricated devices have revealed that 3Dtransmission lines with top metallization only, and capacitorsavoiding the routing of the RF signal over mechanical-springmeanders achieve the best results. A successfully implementedfilter based on this configuration is shown, with a passbandinsertion and return loss of 5 and 12 dB, respectively, at a centerfrequency of 20 GHz. Various MEMS actuators designs withspring constants from 3.5 to 95 N/m have been implemented,resulting in actuation voltages of 15.4 to 73 V. The self-actuationpower simulated in a non-linear Agilent Advanced DesignSystem model has been estimated to 40 and 50 dBm for the softand the stiff spring actuators, respectively. The fabrication isdone by a single-mask silicon-on-insulator RF MEMS process.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Sterner, MikaelKTH,Mikrosystemteknik,RF MEMS(Swepub:kth)u1ylclf0 (author)
  • Oberhammer, JoachimKTH,Mikrosystemteknik,RF MEMS(Swepub:kth)u12600dy (author)
  • Sterner, MartinKTH,Mikrosystemteknik(Swepub:kth)u1vwe7hg (author)
  • KTHMikrosystemteknik (creator_code:org_t)

Related titles

  • In:6th European Microwave Integrated Circuits (EuMIC) Conference: The European Microwave Association, s. 526-529, s. 1087-1090
  • In:2011 41ST EUROPEAN MICROWAVE CONFERENCE: The European Microwave Association, s. 526-529, s. 1087-10909782874870224

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By the author/editor
Shah, Umer
Sterner, Mikael
Oberhammer, Joac ...
Sterner, Martin
About the subject
ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
and Electrical Engin ...
and Other Electrical ...
ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
and Electrical Engin ...
Articles in the publication
2011 41ST EUROPE ...
By the university
Royal Institute of Technology

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