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Control of the sensitivity of CRLH interdigital microstrip balanced structures using a co-design genetic algorithm approach

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Abstract

A fully automated tool for designing CRLH interdigital microstrip structures using a co-design synthesis computational approach is proposed and demonstrated experimentally. This approach uses an electromagnetic simulator in conjunction with a genetic algorithm to synthesize and optimize a balanced CRLH interdigital microstrip transmission line. The high sensitivity of a long balanced transmission line to fabrication tolerances is controlled by the use of a high precision 3D simulator. The 2.5D simulator used was found insufficient for a large number of unit cells. A 13 UC CRLH transmission line is designed with the proposed approach. The response sensitivity of the balanced transmission lines to the over/under-etching factor is highlighted by comparing the measurements of four lines with different factors. The effect of over/under-etching is significant for values larger than 10 μm.

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Authors and Affiliations

  1. Laboratoire de Conception et d’Integration des Systèmes (LCIS), Grenoble Institute of Technology, Valence, France

    R. Siragusa, E. Perret, P. Lemaître-Auger & S. Tedjini

  2. Poly-Grames Research Center, École Polytechnique de Montréal, Montréal, Canada

    H. V. Nguyen & C. Caloz

Authors
  1. R. Siragusa
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  2. E. Perret
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  3. H. V. Nguyen
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  4. P. Lemaître-Auger
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  5. S. Tedjini
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  6. C. Caloz
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Correspondence to R. Siragusa.

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Siragusa, R., Perret, E., Nguyen, H.V. et al. Control of the sensitivity of CRLH interdigital microstrip balanced structures using a co-design genetic algorithm approach. Appl. Phys. A 103, 709–714 (2011). https://doi.org/10.1007/s00339-010-6205-z

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  • DOI: https://doi.org/10.1007/s00339-010-6205-z

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