Elimination of the multiple-solutions ambiguity in permittivity extraction from transmission-only measurements of lossy materials
✍ Scribed by U. C. Hasar
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 212 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A simple yet powerful method is proposed for removing the multiple solutions problem in the complex permittivity, ϵ, determination from measured transmission scattering (S‐) parameter measurements of lossy materials. The method uses amplitude‐only measurements at two slightly separated frequencies to estimate an accurate initial guess. For this purpose, we derive a one‐variable objective function for fast evaluation, which lends itself to measurement automation. The method provides an estimation for real and imaginary parts of the ϵ, which can be utilized as a measure for checking the correctness of initial ϵ estimate. The method is very useful for band‐limited measurements. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 337–341, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24048