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The effect of shorting post on axe-shaped circular antenna miniaturization
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. Zhejiang University, China.
2009 (English)In: PIERS 2009 Beijing: Progress in Electromagnetics Research Symposium, Proceedings I and II, Electromagnetics Academy , 2009, 1407-1410 p.Conference paper, Published paper (Refereed)
Abstract [en]

An edge shorted axe-shaped circular antenna is studied for miniaturization. The effect of the location and number of shorting post on the resonance frequency, impedance match and radiation pattern are studied. By inserting a shorting post near the edge of circular axe- shaped patch, the antenna size (resonates at 1.36 GHz) is reduced about 72% compared to the antenna without shorting post (resonates at 2.58 GHz) and 91% compared to the conventional circular antenna (resonates at 4.6 GHz). The effects of the distance between feeding point and shorting post, the number of shorting posts and the post radius are analyzed. The results show that by putting a shorting post near the edge of the axe-shaped circular patch, the resonant frequency is lower than a post near the center. Meanwhile, the feed should be excited near the shorting post for better impedance match. The effect of increasing the number of shorting post is also studied. If the number of shorting posts is increased to 3, the resonant frequency shifts to 1.48 GHz, which is higher than that with only one shorting post. However, the design offers stable return loss and broadside radiation pattern.

Place, publisher, year, edition, pages
Electromagnetics Academy , 2009. 1407-1410 p.
Series
Progress in Electromagnetics Research Symposium, ISSN 1559-9450 ; 2
Keyword [en]
Impedance matching (electric), Miniature instruments, Natural frequencies, Tools, Antenna miniaturization, Broadside radiations, Circular Patch, Feeding points, Impedance match, Resonance frequencies, Resonant frequency shift, Shorting posts, Antennas
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-164530ISI: 000268101100303Scopus ID: 2-s2.0-84898965454ISBN: 9781618390554 (print)OAI: oai:DiVA.org:kth-164530DiVA: diva2:806727
Conference
Progress in Electromagnetics Research Symposium 2009, PIERS 2009 Beijing, 23 March 2009 through 27 March 2009, Beijing, China
Note

QC 20150421

Available from: 2015-04-21 Created: 2015-04-17 Last updated: 2015-04-21Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
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  • en-US
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  • nn-NB
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  • Other locale
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Output format
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