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Istanbul Technical University Electromagnetic Research Group

Istanbul Technical University Electromagnetic Research Group. www.erg.itu.edu.tr. Information . Founded in 1990 Research on Reconstruction Methodologies Main Attention on Imaging of the Inaccessible Objects International Collaborations Numerous Publications. Research Subjects.

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Istanbul Technical University Electromagnetic Research Group

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  1. Istanbul Technical UniversityElectromagnetic Research Group www.erg.itu.edu.tr

  2. Information • Founded in 1990 • Research on Reconstruction Methodologies • Main Attention on Imaging of the Inaccessible Objects • International Collaborations • Numerous Publications

  3. Research Subjects • Scattering from rough surfaces • Scattering from bodies buried under a rough surface • Imaging of rough surfaces • Imaging of bodies buried under rough surfaces • Imaging of perfectly conducting objects • Imaging of dielectric objects • Surface impedance reconstruction • Detection and location of dielectric objects

  4. Projects RECONSTRUCTION OF GEOMETRICAL AND MATERIAL PROPERTIES OF THE OBJECTS BURIED UNDER A ROUGH SURFACE THROUGH ELECTROMAGNETIC WAVES (Supported by TUBITAK)

  5. Recent Publications • Ibrahim Akduman, Rainer Kress and Ali Yapar, “Iterative reconstruction of dielectric rough surface profiles at fixed frequency”, accepted by Inverse Problems • Yasemin Altuncu, Ali Yapar, and Ibrahim Akduman, “On the Scattering of Electromagnetic Waves by Bodies Buried in a Half-Space With Locally Rough Interface”, IEEE Transactions on Geoscience and Remote Sensing. • Ali Yapar, Hulya Sahinturk, Ibrahim AkdumanandRainer Kress, “One-Dimensional Pro¯le Inversion of a Cylindrical Layer with Inhomogeneous Impedance Boundary: A Newton-Type Iterative Solution” , accepted by IEEE Transactions on Geoscience and Remote Sensing. • Yasemin Altuncu, Ali Yapar and Ibrahim Akduman, “On the Scattering of Electromagnetic Waves by Bodies Buried in a Half-space with Rough Interface”, accepted by IEEE Transactions on Geoscience and Remote Sensing. • Ali Yapar, Ozgur Ozdemir, Hulya Sahinturk, and Ibrahim Akduman, “A Newton Method for the Reconstruction of Perfectly Conducting Slightly Rough Surface Profiles”, accepted by IEEE Transactions on Antennas and Propagation

  6. Laboratory Free Space Imaging System

  7. Laboratory (Free Space Imaging System) • Research and Experiment Areas • Design of High Resolution Microwave Imaging Systems • Development of Novel Computational Electromagnetic Methods and Applications • Electromagnetic Compability Tests (EMC) • Antenna Design and Measurements

  8. Laboratory (Free Space Imaging System) General Infrastructure Inn-co Controller Co 1000Agilent Tech. N5230A PNA Series Network Analyzer (10MHz-40GHz)Hewlett Packard E4431B ESG-D Series Signal GeneratorHewlett Packard 83732B Synthesized Signal GeneratorAgilent Tech. E7405A EMC Analyzer (100Hz-26.5GHz) 2x Schwarzbeck BBHA 9120D Horn Antenna2x Schwarzbeck BBHA 9120A Horn AntennaTurn Table8564E Spectrum Analyzer 85671A Phase Noise MeasUtil54616B/ABA Oscilloscope 2GS/s sample 54657A/ABA HP1B storage module 10098A Front panel+pouch ...

  9. Laboratory

  10. Laboratory

  11. Laboratory

  12. Laboratory

  13. Laboratory

  14. First Experiments • started to be made under a basic configuration • An empty copper cylinder • Frequency = 3 GHz • Diameter of cylinder (target) = 12 cm • Distance (From antennas to target) = 1m

  15. First Experimental Results The measured data for magnitude of the scattered field and the one for the analytical solution

  16. First Experimental Results The measured data for phase of the scattered field and the one for the analytical solution

  17. First Experimental Results The Reconstruction of the target

  18. CONTACT • Director Ibrahim Akduman, Ph.D.ProfessorPhone: +90 212 285 36 81 Fax: +90 212 285 36 79 E-mail: akduman@itu.edu.tr • Ali Yapar, Ph.D.Associate ProfessorPhone: +90 212 285 36 34 Fax: +90 212 285 35 65 E-mail: aliyapar@itu.edu.tr

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