The effect of antenna in the forward model of near field microwave imaging systems

Dalkilic, Akin
Alatan, Lale
A fast and accurate forward problem solver for near-field microwave imaging systems is developed by considering the electric field intensity as the measured quantity. Since the antenna port voltage values will be the real measured quantity in practical applications, the effects of transmitting/receiving antennas in the forward problem model is investigated.


Design of asymmetric coplanar strip folded dipole antennas /
Karaciğer, Kamil; Alatan, Lale; Department of Electrical and Electronics Engineering (2014)
This thesis includes the design, simulation, production and measurement of an asymmetric coplanar strip folded dipole antenna suitable to be used as an element in a linear array operating at S-band (2.7 GHz - 3.3 GHz). In this same manner, its usefulness as an array antenna is also explored in this thesis. This antenna element consists of a microstrip line feed, microstrip to coplanar stripline transition (BALUN) and asymmetric coplanar strip (ACPS) folded dipole. The planar folded dipole can be constructed...
The effects of mutual coupling between antenna elements of the performance adaptive arrays
Özkaya, Güney; Alatan, Lale; Department of Electrical and Electronics Engineering (2003)
Array processing involves manipulation of signals induced on various antenna elements. In an adaptive array system, the radiation pattern is formed according to the signal environment by using signal processing techniques. Adaptive arrays improve the capacity of mobile communication systems by placing nulls in the direction of interfering sources and by directing independent beams toward various users. Adaptive beamforming algorithms process signals induced on each array element that are assumed not to be a...
An approach for quantum capacitance of graphene, carbon nanotube, silicene and hexagonal boron nitride nanoscale supercapacitors by non-equilibrium Green's function method
Özdoğan, Cem; Kökten, Hatice (2022-01-01)
We introduce a comprehensive approach to calculate quantum capacitance of nanoscale capacitors as a function of applied potential difference to have resemblance to actual device operating conditions. Ab initio analysis based on the non-equilibrium Green's functions combined with density functional theory was applied for different elementary materials and geometries for the soundness of the approach. The results of planar single layer graphene, silicene, and hexagonal boron nitride and for tubular carbon nan...
Design of a dual polarized low profile antenna for microwave brain imaging
Üçel, Kaan; Alatan, Lale; Department of Electrical and Electronics Engineering (2022-5-9)
In this thesis, a low profile, low cost, wide band (0.9-2GHz) dual linearly polarized printed dipole antenna is designed to be used in microwave brain imaging systems. Dual polarization feature offers superior data acquisition through polarization diversity for better image quality. Starting from a simple printed dipole, antenna structure is modified step by step to meet these design requirements. Since a conductive surface in close vicinity of the antenna affects antenna performance, in order to obtain uni...
The Analysis of Inhomogeneous Barrier Height in In/SnTe/Si/Ag Diode
Güllü, Hasan Hüseyin; YILDIZ, DİLBER ESRA (2018-12-01)
SnTe thin film layer was fabricated by magnetron sputtering technique on n-Si substrate, and the electrical properties of the In/SnTe/Si/Ag diode structure was investigated by using temperature dependent forward bias current-voltage (I-V) measurements. The main diode parameters were calculated according to the thermionic emission (TE) model and they were found in an abnormal behavior with change in temperate in which zero-bias barrier height (Phi(B0)) increases and ideality factor (n) decreases with increas...
Citation Formats
A. Dalkilic and L. Alatan, “The effect of antenna in the forward model of near field microwave imaging systems,” 2019, Accessed: 00, 2020. [Online]. Available: