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Frequenz

Journal of RF-Engineering and Telecommunications

Editor-in-Chief: Jakoby, Rolf

12 Issues per year


IMPACT FACTOR 2016: 0.462

CiteScore 2016: 0.43

SCImago Journal Rank (SJR) 2016: 0.183
Source Normalized Impact per Paper (SNIP) 2016: 0.333

Online
ISSN
2191-6349
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Volume 68, Issue 1-2 (Jan 2014)

Issues

Determination of Effective Constitutive Properties of Metal Powders at 2.45 GHz for Microwave Processing Applications

M. Jaleel Akhtar
  • Corresponding author
  • Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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  • Other articles by this author:
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/ Nilesh K. Tiwari
  • Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Jutika Devi
  • Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Morsi Mahmoud / Guido Link / Manfred Thumm
Published Online: 2014-01-07 | DOI: https://doi.org/10.1515/freq-2013-0083

Abstract

A reflection-transmission based rectangular waveguide approach for measuring the effective constitutive properties of metal powders at 2.45 GHz is presented. The measured effective dielectric properties of these metal powders are quite important for sintering of metal powders using microwaves, which is a new area of research. The proposed method is based on placing the metal powders of varying density into a standard glass tube, which is then positioned inside a specially designed waveguide holder for measuring the scattering coefficients at 2.45 GHz using a vector network analyser. The effective constitutive properties of the metal powders are obtained in terms of the measured scattering coefficients using the proposed two step approach. In order to validate the accuracy of the measured material properties, an electromagnetic core-shell model of the metal powders is developed. Finally, the effective dielectric properties of Cu and stainless steel powders are measured and compared with the values obtained using the electromagnetic model.

Keywords: artificial dielectrics; effective constitutive properties; dielectric measurements; metal powders; microwave sintering; microwave non-destructive testing

About the article

Received: 2013-06-25

Published Online: 2014-01-07

Published in Print: 2014-01-31


Citation Information: Frequenz, ISSN (Online) 2191-6349, ISSN (Print) 0016-1136, DOI: https://doi.org/10.1515/freq-2013-0083.

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©[2014] by Walter de Gruyter Berlin Boston. Copyright Clearance Center

Citing Articles

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[1]
Ashis K. Mandal and Ranjan Sen
Materials and Manufacturing Processes, 2017, Volume 32, Number 1, Page 1
[2]
Azizurrahaman Ansari, Abhishek Kumar Jha, and M.J. Akhtar
Powder Technology, 2015, Volume 286, Page 459

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