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Activities

Upcoming Activity (See Below For More Details)

7 April 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.5)

Speaker:  Dr. Mehmet Çiydem, Engitek Ltd.

Location: Middle East Technical University, Ankara, Turkey

 

 

January 2017

February 2017

  • 24 February 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.1)

Speaker: Assoc. Prof. Fatih Dikmen, Gebze Technical University

Topic: “Construction of Efficient Wave Scattering Algorithms in 2D with Integral Equation Formulations”

Location: Middle East Technical University, Ankara, Turkey

Abstract: Boundary integral equations emerging for solutions of homogeneous Helmholtz equation under Dirichlet and Neumann boundary conditions will be under consideration. They model 2D monochromatic electromagnetic wave scattering phenomena, polarization of which are classified according to the transverse 2D plane as TM and TE. The scatterer is a perfectly conducting obstacle with smooth boundary, and excited by incident electromagnetic waves of the mentioned polarizations above, which are considered in both EFIE and MFIE. The issues and notions for implementation of an efficient algorithm to obtain the solution with high accuracy and with guaranteed convergence will be discussed.

Bio: Assoc. Prof. Fatih Dikmen is currently holding his tenure position in Gebze Technical University, Electronics Engineering Department, after his entitlement for the degree in October 2015.  He earned the bachelor of science degree from İstanbul Technical University, Electrical Engineering Department, in 1993.  He was graduated from the institution that he is working for now, but as a research assistant and with the name then, Gebze Institute of Technology, Electronics Engineering Department, as master of science in 1998 and as a PhD in 2004.  In the next 18 months, he participated at Bilkent University, Computational Electromagnetics Research Group as a postdoc researcher before starting his lecturer career back in Gebze in 2006, which lasted till 2016 before earning his current position.  His research interests and objectives are directed to semi-analytical methods, as well as direct numerical methods in computational electromagnetics.  The talk is a review of his current research supported by TUBİTAK 3001 project grant which he is a director of and is a collaborative work with CEMMETU, under supervision of its director Assoc. Prof. Özgür Ergül.  He likes to name his newborn research group as LABNUANCE (Laboratory for Numerical and Analytical Computations in Electromagnetics).

March 2017

  • 3 March 2017 (15:00):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.2)

Speaker: Prof. Ayhan Altıntaş, Bilkent University

Topic: “Design and Implementation of an Electromagnetic Wireless Passive Structural Health Monitoring System”

Location: Middle East Technical University, Ankara, Turkey

Abstract: Structural health monitoring (SHM) is an area which aims to ensure prevention or detection of damage in structures and protection of human life via observation of certain damage indicators. In SHM, one of the most important damage indicators is the strain forming on the steel reinforcing bars (rebars) embedded inside the concrete. This strain can slowly develop over time, or, can suddenly occur due to an overload such as an earthquake. In this study, a novel wireless passive sensing system is presented for detecting and measuring the level of strain and relative displacement in structures.

Bio: Prof. Ayhan Altıntaş received BS and MS degrees from Middle East Technical University, Ankara, Turkey, and Ph.D. degree from Ohio State University, all in electrical engineering, in 1979, 1981, and 1986, respectively. He is a professor of  Electrical and Electronics Engineering and is the director of Communication and Spectrum Management Research Center (ISYAM) at Bilkent University. He is the recipient of IEEE Third Millennium Medal 2000, Alexander von Humboldt Research Fellowship 1998, TÜBİTAK (Scientific and Technical Research Council of Turkey) Research Award 1996. At present, he is the President of URSI National Committee. Dr. Altıntaş’s research interests are in electromagnetics, antennas and propagation.

  • 10 March 2017 (15:00):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.3)

Speaker: Prof. Gökhan Çınar, Eskişehir Osmangazi University

Topic: “Wiener-Hopf Analysis of Baltic HVDC Submarine Power Cable Measurement”

Location: Middle East Technical University, Ankara, Turkey

Abstract: In this talk, the Wiener-Hopf analysis of TEM wave reflection along a coaxial waveguide with a step discontinuity on the outer wall will be presented. The proposed geometry is a basic model of the Baltic HVDC submarine power cable measurement, which was done recently in Sweden. The analysis is carried out rigorously by applying direct Fourier transform and reducing the problem into the solution of a modified Wiener-Hopf equation of the second type. The solution for the field terms are determined in terms of infinite number of unknown coefficients which satisfy an infinite set of linear algebraic equations. These unknown coefficients are solved numerically and the effect of area ratio on the reflection coefficient is determined.

Bio: Gökhan Çınar received BS and MS degrees in electronics and telecommunication engineering from Istanbul Technical University in 1998 and 2001, respectively. He received his Ph.D. degree in electronics engineering from Gebze Institute of Technology in 2004. He held the assistant and associate professorship positions at Gebze Institute of Technology between 2004 and 2015. He started working at Electrical and Electronics Engineering department of Eskişehir Osmangazi University in 2015 where he was entitled as a full professor in 2016. He was with the Linnaeus University, Sweden between September 2009 and December 2010 as a visiting research for a collaboration, which is still going on, on electromagnetic modeling of submarine power cables and flow acoustics. His research interests include mathematical modeling in general and rigorous methods applied to electromagnetic and acoustic scattering problems, such as Wiener-Hopf and mode-matching techniques.

  • 17 March 2017 (15:00):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.4)

Speaker: Asst. Prof. Hüseyin Arda Ülkü, Gebze Technical University

Topic: “Quantum Corrected Plasmonic Field Analysis using Time Domain Surface Integral Equation Solvers

Location: Middle East Technical University, Ankara, Turkey

Abstract: When two structures are within sub-nanometer distance of each other, quantum tunneling effect becomes relevant. These effects cannot be accurately modeled by classical electromagnetic solvers. In this study, an auxiliary tunnel that connects the structures is introduced to model the quantum tunneling effect. The quantum model of the tunnel is obtained using density functional theory (DFT) computations, which account for the atomic structure of materials. The plasmonic fields on the resulting connected structure are analyzed using a time domain surface integral equation solver. Time domain samples of the dispersive medium Green function and the dielectric permittivities are computed from the analytical inverse Fourier transform applied to the rational function representation of their frequency domain samples. Numerical results, which demonstrate the effect of the quantum correction on the transient electromagnetic interactions, will be presented.

Bio: Hüseyin Arda Ülkü received the B.S., M.S., and Ph.D. degrees in Electronics Engineering from Gebze Technical University (GTU), Kocaeli, Turkey, in 2006, 2008, and 2011, respectively. Between 2007 and 2016, he was a Research and Teaching Assistant with the Electromagnetic Fields and Microwave Division, Department of Electronics Engineering, GTU, where he is an Assistant Professor since 2016. Between 2011 and 2015, he was a Postdoctoral Fellow with the Division of Computer, Electrical, and Mathematical Sciences and Engineering (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. His research interests include the field of computational electromagnetics with a focus on time-domain integral equations.

April 2017

  • 7 April 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.5)

Speaker: Dr. Mehmet Çiydem, Engitek Ltd.

Topic: “Mobile Base Station Communication Antennas”

Location: Middle East Technical University, Ankara, Turkey

  • 14 April 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.6)

Speaker: Prof. Özlem Aydın Çivi, Middle East Technical University

Topic: Reconfigurable Reflectarrays: Design, Analysis and Fabrication 

Location: Middle East Technical University, Ankara, Turkey

  • 21 April 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.7)

Speaker: Assoc. Prof. Hüsnü Emrah Ünalan, Middle East Technical University

Topic: TBD

Location: Middle East Technical University, Ankara, Turkey

 —

This seminar is postponed to a later date.

Topic: “Multiphysics Modeling in Computational Electromagnetics: Challenges and Opportunities” 

Location:  Middle East Technical University, Ankara, Turkey

Funder:  IEEE Antennas and Propagation Society

This seminar is postponed to a later date.

Topic: “The Fascinating World of Computational Electromagnetics” 

Location:  Bilkent University, Ankara, Turkey

Funder:  IEEE Antennas and Propagation Society

  • 28 April 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.8)

Speaker: Prof. İrşadi Aksun, Koç University

Topic: “Understanding Surface Plasmon Polaritons (SPP) via Critical Study of Dispersion Relation – Complete Picture and Correct Interpretation”

Location: Middle East Technical University, Ankara, Turkey

May 2017

  • 2 May 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.9)

Speaker: Prof. Ibrahim Tekin, Sabancı University

Topic: “High Isolation Full Duplex Communication Antennas”

Location: Middle East Technical University, Ankara, Turkey

  • 12 May 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.10)

Speaker: Assoc. Prof. Alpan Bek, Middle East Technical University

Topic: TBD

Location: Middle East Technical University, Ankara, Turkey

  • 18 May 2017 (13:40):  IEEE AP/MTT/EMC/ED Turkey 2017 Seminar Series (S.11)

Speaker: Assoc. Prof. Mustafa Seçmen, Yaşar University

Topic: “Multipaction Effect and Analysis”

Location: Middle East Technical University, Ankara, Turkey

June 2017

July 2017

August 2017

September 2017

Location:  Middle East Technical University, Ankara, Turkey

Topic:  “Advanced Antenna Systems for 21st Century Satellite Communication Payloads” 

Location:  Middle East Technical University, Ankara, Turkey

Funder:  IEEE Antennas and Propagation Society

October 2017

Topic: “Design of Millimeterwave Multifunction Integrated Circuits for Data Communication and Remote Sensing Applications” 

Location:  Middle East Technical University, Ankara, Turkey

Funder:  IEEE Microwave Theory and Techniques Society

November 2017

December 2017