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Antenna robustness modelling
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Mid Sweden University , 2007. , p. 171
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 19
Keywords [en]
antenna, robust, Monte Carlo, methodology, bootstrap
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-8886ISBN: 978-91-85317-46-2 (print)OAI: oai:DiVA.org:miun-8886DiVA, id: diva2:216076
Public defence
2007-05-29, Sundsvall, 13:15 (English)
Opponent
Supervisors
Available from: 2009-05-06 Created: 2009-05-06 Last updated: 2011-04-12Bibliographically approved
List of papers
1. Robustness comparison of bow-tie and dipole antennas
Open this publication in new window or tab >>Robustness comparison of bow-tie and dipole antennas
2005 (English)In: IEE Proceedings - Microwaves Antennas and Propagation, ISSN 1350-2417, E-ISSN 1359-706X, Vol. 151, no 6, p. 525-529Article in journal (Refereed) Published
Abstract [en]

The paper describes the application of a computer intensive methodology to evaluate antenna susceptibility to random physical damage for a dipole and a bow-tie antenna. For each randomly generated damage pattern antenna parameters are simulated and a statistical comparison is performed. Computer intensive statistical methods like the Bootstrap, used here for postprocessing, make fewer initial assumptions than classical statistical methods when modelling a problem, and are robust against small deflections from these assumptions. The bias-corrected and accelerated (BCa) Bootstrap method is used for confidence interval estimates. The dipole antenna is found to be more robust to numbers of small (similar to 100th of a wavelength) circular holes penetrating the structure than the bow-tie antenna.

Keywords
antennas, bootstrap, robustness
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-2672 (URN)10.1049/ip-map:20040914 (DOI)000225963600011 ()2076 (Local ID)2076 (Archive number)2076 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved
2. Bow-tie and dipole antenna feed robustness mechanisms
Open this publication in new window or tab >>Bow-tie and dipole antenna feed robustness mechanisms
2006 (English)In: IEEE Antennas and Wireless Propagation Letters, ISSN 1536-1225, E-ISSN 1548-5757, Vol. 5, no 1, p. 163-167, article id 872410Article in journal (Refereed) Published
Abstract [en]

In a previous paper, (Olsson, Sidén, and Koptioug, "Robustness comparison of bow-tie and dipole antennas," IEE Proceedings Microwaves, Antennas and Propagation, vol. 151, no 6, Dec. 2004, pp. 525-529), it was shown that the dipóle antenna is more robust than the bow-tie antenna, with same radiator aperture area, to numbers of small randomly positioned holes penetrating the structures. In present paper it is shown that for a small number of holes the bow-tie antenna is more robust due to lower hit probability in high current density areas. The results show that the bow-tie feed is more robust for a small amount of damage, whereas the strip dipole feed (of width w and thickness t, with w ≫ t) is more robust in general terms, and particularly for larger number of damages.

Keywords
Antenna, Antenna feeds, Antenna tolerance analysis, Dipole antennas, Robustness
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-3629 (URN)10.1109/LAWP.2006.872410 (DOI)000243815900044 ()2-s2.0-34249903693 (Scopus ID)4190 (Local ID)4190 (Archive number)4190 (OAI)
Note

VR-Materials Science

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved
3. Comparative robustness study of planar antennas
Open this publication in new window or tab >>Comparative robustness study of planar antennas
2007 (English)In: IET Microwaves, Antennas & Propagation, ISSN 1751-8725, E-ISSN 1751-8733, Vol. 1, no 3, p. 674-680Article in journal (Refereed) Published
Abstract [en]

Is it possible to produce a planar dipole-like antenna with a reduced conductive area without any loss in either robustness or performance? The objective is to reduce the amount of expensive conductor to be used when applying a meshing technique to the printing of antennas. In this context, robustness means that the characteristics are maintained when the antenna is damaged, for example if it is scratched. This is particularly important for radio frequency identification tags in logistic systems. A general antenna robustness evaluation methodology, based on numerical simulations of a large number of randomly damaged antennas, is used for the antenna comparisons. The antenna performance degradation, based on the return loss (S11) at 868MHz, is monitored for some basic planar antennas. Finally, we show that it is possible to produce robust low-cost antennas using wire replacements for the solid planar antennas and thus, provided that the robustness requirement is moderate, replace the solid antenna with a thin conductor analogue.

Keywords
Antennas, robustness, RFID
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-3630 (URN)10.1049/iet-map:20060155 (DOI)000247853300021 ()2-s2.0-34249880500 (Scopus ID)4191 (Local ID)4191 (Archive number)4191 (OAI)
Projects
STC - Sensible Things that Communicate
Note

VR-

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved
4. Robustness of printed patch antenna
Open this publication in new window or tab >>Robustness of printed patch antenna
2007 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 55, no 10, p. 2709-2717Article in journal (Refereed) Published
Abstract [en]

We address the question of robustness of damaged microstrip antennas, the damage being either penetrating, caused by fragment impact, or floating, caused by manufacturing imperfections. A simple analytic expression is derived to facilitate the prediction of robustness. To verify this expression a Monte Carlo method, based on a general 3D electromagnetic solver, is used to evaluate the robustness of the antennas. The simulations are verified by measurements and supplementary simulations in an alternative electromagnetic solver, using the finite difference time domain method (FDTD). The agreement between the simulated results and the analytic expression is found to be good in a qualitative comparison.

Keywords
Antennas
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-3631 (URN)10.1109/TAP.2007.905950 (DOI)000250178500009 ()2-s2.0-35348842141 (Scopus ID)4192 (Local ID)4192 (Archive number)4192 (OAI)
Projects
STC - Sensible Things that Communicate
Note

VR-Materials Science

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved

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