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Reconfigurable small antenna for mobile phone using MEMS tunable capacitor
KTH, School of Electrical Engineering (EES), Signal Processing.
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2013 (English)In: 2013 Loughborough Antennas and Propagation Conference, LAPC 2013, IEEE , 2013, 354-357 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we present a tunable PIFA which can be used in a mobile terminal. A NanoMechâ„¢ process enabled MEMS digital variable capacitor has been used as a capacitive load to the antenna. The antenna occupies a volume of just 1.3 cc and is targeted to be placed at the bottom corner of the device. With the help of tunability the antenna is able to cover from 704-960MHz in the low-band and 1710-2170MHz in the high-band, thus covering a wide range of frequency bands required for GSM/WCDMA/LTE systems. The MEMS device has an equivalent series inductance of less than 0.1nH hence the variation in the capacitance value with respect to frequency is less than 10%up to 5GHz. Further, the equivalent series resistance (ESR) of the digital variable capacitor is <0.4 across the whole frequency range of interest, hence causing very low insertion loss to the antenna. The tunable antenna is characterized by measuring it in 3D anechoic chamber. The measured total efficiency of the antenna varies from -4 to -2dB for 700MHz-960MHz and -3dB to -2dB for 1710-2170MHz.

Place, publisher, year, edition, pages
IEEE , 2013. 354-357 p.
Keyword [en]
MEMS, PIFA, tunable antenna
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-143813DOI: 10.1109/LAPC.2013.6711919ISI: 000333336400076Scopus ID: 2-s2.0-84893685556ISBN: 978-147990091-6 (print)OAI: oai:DiVA.org:kth-143813DiVA: diva2:710987
Conference
2013 Loughborough Antennas and Propagation Conference, LAPC 2013; Loughborough, Leicestershire; United Kingdom; 11 November 2013 through 12 November 2013
Note

QC 20140409

Available from: 2014-04-09 Created: 2014-03-31 Last updated: 2014-05-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • 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
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  • asciidoc
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