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Seyit Sencer Koç

Department of Electrical and Electronics Engineering
Scopus Author ID
The Fast Multipole Method for Sparse Solution of Linear Inverse Scattering Problems
Miran, Emre Alp; Koç, Seyit Sencer (2018-11-02)
The sparse solution for the linear inverse problems provide useful results for many fundamental engineering applications such as radar imaging. The studies in the literature has shown that the computational methods for the...
VHF suspended plate transmitter antenna design for DVB-T and DAB-T
Ali, Abdul; Ciydem, Mehmet; ALTINTAŞ, AYHAN; Koç, Seyit Sencer (2018-06-01)
This paper presents the design of stacked suspended plate transmitter antenna for digital video and audio broadcasting. Contrary to conventional dipole structures, we have designed the antenna in VHF band (174-254MHz) with...
UWB 3D Near-Field Imaging with a Sparse MIMO Antenna Array for Concealed Weapon Detection
Anadol, Erman; Seker, Ilgin; Camlica, Sedat; Topbas, Tankut Oguz; Koç, Seyit Sencer; Alatan, Lale; Öktem, Sevinç Figen; Aydın Çivi, Hatice Özlem (2018-04-18)
An ultra-wide-band (UWB) multiple-input multiple-output (MIMO) radar with a sparse array is designed and manufactured for three-dimensional near-field imaging applications such as concealed weapon detection. Contrary to ex...
An Efficient Semianalytical Method for Hypersingularity Treatment Over Curved Patches
Selcuk, G.; Koç, Seyit Sencer (2017-05-01)
In this communication, we propose an efficient method to evaluate hypersingular integrals defined on curved surfaces. First an exact expression for hypersingular kernel is derived by projecting the integral on curvilinear ...
Amplitude Tapering Scheme for Through-Element Coupled Antenna Arrays
Miran, Emre Alp; Koç, Seyit Sencer (2016-07-01)
A new approach is proposed to achieve appropriate amplitude distribution for series-fed linear microstrip patch antenna arrays. Through element coupled patches are further investigated to attain more control on the level o...
Interference Supression in GPS Receivers using Spatial Filtering
Erdem, Fatih; Dabak, Omer Can; Sonmez, Tolga; Alatan, Lale; Koç, Seyit Sencer (2016-05-19)
GPS receiver operation can be interrupted by intentional/unintentional jammers even with low power levels. As the jammers become more abundant, protection of critical systems gains importance. In this work, it is aimed to ...
Evaluation of Hypersingular Integrals on Curvilinear Surface Elements
Selcuk, Gokhun; Koç, Seyit Sencer (2016-04-15)
In this study finite part integrals are utilized for evaluation of hypersingular and nearly-hypersingular surface integrals on curvilinear elements. These integrals are related to the second derivative of the free space Gr...
Interference Suppression in a GPS Receiver with 4 Element Array Design and Implementation of Beamforming Algorithms
Dabak, Omer Can; Erdem, Fatih; Sonmez, Tolga; Alatan, Lale; Koç, Seyit Sencer (2016-04-14)
Global Positioning System (GPS) jammers add excessive noise to the received low power GPS signals and have capability to either weaken or completely destroy the positioning performance of GPS receivers for both civilian an...
Wavefront-ray grid FDTD algorithm
Ciydem, Mehmet; Koç, Seyit Sencer (2016-01-01)
A finite difference time domain algorithm on a wavefront-ray grid (WRG-FDTD) is proposed in this study to reduce numerical dispersion of conventional FDTD methods. A FDTD algorithm conforming to a wavefront-ray grid can be...
A Novel Numerical Method for Evaluation of Hypersingular Integrals in Electromagnetics
Selcuk, Gokhun; Demir, Oguz; Koç, Seyit Sencer (2015-11-28)
In this study we develop a numerical method for evaluation of hypersingular surface integrals, which arise in the solution of electric field integral equation (EFIE) via Nystrom method. Due to the divergent contribution of...