Mert Kalfa

Mert Kalfa
Bilkent University · Department of Electrical & Electronic Engineering

Doctor of Philosophy

About

20
Publications
473
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
57
Citations
Additional affiliations
December 2020 - present
Huawei
Position
  • Principal Investigator
December 2020 - present
Bilkent University
Position
  • Research Associate
July 2010 - December 2020
ASELSAN Inc.
Position
  • Engineer

Publications

Publications (20)
Article
Advances in machine learning technology have enabled real-time extraction of semantic information in signals which can revolutionize signal processing techniques and improve their performance significantly for the next generation of applications. With the objective of a concrete representation and efficient processing of the semantic information, w...
Article
The current state-of-the-art error control of Multilevel Fast Multipole Algorithm (MLFMA) is valid for any given error threshold at any frequency, but it requires a multiple-precision arithmetic framework to be implemented. In this work, we use asymptotic approximations and curve-fitting techniques to derive accurate closed-form expressions for the...
Article
We introduce and demonstrate a new error control scheme for the computation of far-zone interactions in the multilevel fast multipole algorithm (MLFMA) when implemented within a multiple-precision arithmetic (MPA) framework. The proposed scheme provides the optimum truncation numbers as well as the machine precisions given the desired relative erro...
Conference Paper
Slotted waveguide array antennas offer low cross-polarization and high power handling capacity, and they are low-profile which enables them to be used in conformal and structurally-integrated antenna solutions. Hence, they are excellent candidates for phased array antennas in radar applications, especially in air platforms. Aerodynamics and radar c...
Article
A method of moments/Green's function (MoM/GF) technique in the space domain is used for the rigorous and fast analysis of cylindrically conformal slotted sectoral waveguide arrays (SSWGAs) in the presence of multilayered cylindrical dielectric radomes. Representing the slots by fictitious magnetic currents via the equivalence principle, the geometr...
Conference Paper
An accelerated method for characterizing active reflection coefficients in electrically large uniform active phased arrays is presented. The proposed method only requires the S-parameters related to the center and few edge elements, which dramatically reduces the total number of measurements to be performed with a 2-port vector network analyzer (VN...
Conference Paper
form only given. Slotted waveguide antenna arrays with dielectric covers are widely used in both military and civil applications due to their low-profile, high power handling capacity, and the ability to conform to the host platform. Conformity is especially required for air platforms where aerodynamics and radar cross section (RCS) of the vehicle...
Conference Paper
form only given. The design and analysis of dielectric-covered slotted waveguide arrays are of great interest in many military and civil applications, because of their low-profile, high efficiency and high power handling capabilities. Regarding the efficient and accurate analysis of such antennas, integral equation (IE) based methods that utilize t...
Article
Closed-form Green's function (CFGF) representations are developed for tangential magnetic current sources to calculate the mutual coupling between apertures on perfectly conducting circular cylinders covered with dielectric layers. The new representations are obtained by first rewriting the corresponding spectral domain Green's function representat...

Network

Cited By

Projects