Papers by Duygu Nazan Gencoglan
Zenodo (CERN European Organization for Nuclear Research), Jun 30, 2023
A microstrip patch antenna loaded with Split Ring Resonator is proposed for 5G Communication syst... more A microstrip patch antenna loaded with Split Ring Resonator is proposed for 5G Communication systems. The overall dimension of the antenna is 50 mm x 40 mm x 1.6 mm. The designed antenna operates in n77, n78, and n79 bands of the fifth generation (5G) Communication system. The parameters of Return Loss, VSWR, Radiation Pattern and radiation efficiency are investigated in the sub 6 GHz range. The proposed antenna is fabricated and analyzed experimentally to verify the simulation results. Additionally, linear regression analysis is used to determine the relative permittivity of the substrate. Different substrate materials with the thickness of 1.6 mm are selected and the antenna is analyzed with these substrate materials. The dataset consists of the real and imaginary parts of the electric and magnetic field components with respect to the spatial coordinates. Coordinates are-40.625≤x≤40.625,-45.5≤y≤45.5, and-20.325≤z≤21.925. A total of 52780 instances are obtained by changing the substrate material. As a result of the linear regression analysis, the mean absolute error (MAE) is found to be 0.0748 and correlation coefficient to be 0.9758. Thus, the dielectric constant of the substrate material could be estimated by the proposed approach without using numerical or analytical models. In summary, multiple linear regression is a useful tool for designing SRR-loaded patch antennas for 5G communications and estimating antenna substrate materials. It allows for predictive modeling, variable selection, interpretability, and flexibility, which can help to optimize the antenna performance and substrate material selection for various 5G communication applications.
Çukurova Üniversitesi Mühendislik Mimarlık Fakültesi dergisi, Dec 31, 2019
In this paper, a modified bowtie antenna structure is proposed for Ultra-Wideband communication s... more In this paper, a modified bowtie antenna structure is proposed for Ultra-Wideband communication systems. This antenna is obtained by rounding and notching the edges of antenna arms. Antenna parameters for the designed structure are examined according to the restrictions specified by Federal Communications Commission. Thus, Return Loss (S 11), Voltage Standing Wave Ratio (VSWR), gain, radiation pattern and impedance are observed in the 3.1 GHz-10.6 GHz frequency range. Additionally, the effect of arm length and dielectric material on antenna performance are interpreted in the same range. According to obtained results, the proposed structure satisfies the bandwidth requirements for Ultra-Wideband systems. Gain and impedance variations are also in acceptable limits for Ultra-Wideband applications. The proposed antenna is analyzed through CST Microwave Studio program.
Çukurova Üniversitesi Mühendislik Fakültesi Dergisi, May 10, 2021
In this study, a dual-band patch antenna with improved gain and group delay characteristics is pr... more In this study, a dual-band patch antenna with improved gain and group delay characteristics is proposed for C-band and X-band applications in radar and satellite communications. In the study, conventional square patch antenna is modified by partially removing the ground plane and rounding the patch corners. The radius of the rounded patch corners is determined by parametric study to achieve the best antenna performance. According to this parametric study, the value of the radius is set to 2 mm. Antenna performance is analysed both in frequency and time domains. Return Loss, Voltage Standing Wave Ratio, gain, radiation pattern, and group delay are investigated via CST Microwave Studio program. Experimental study is also performed to verify the simulation results. The results show that the designed antenna with rounded patch corners and partial ground plane has dual band characteristic. The two resonance frequencies are 6.85 GHz and 9.1 GHz in the simulation results, and 6.56 GHz and 9.12 GHz in the measurement results. The antenna has maximum gain of 5.8 dB. Additionally, group delay variation is very small in the related frequency range. Thus, it is verified that, the proposed antenna has enhanced bandwidth, improved gain and more uniform group delay as compared to the conventional square patch antenna. The proposed dual-band antenna is a quite promising structure with its appropriate gain and uniform group delay characteristics for C-band and X-band applications in radar and satellite communications.
Majlesi Journal of Telecommunication Devices, Nov 15, 2017
Beveled edge rounded bowtie antenna is proposed for UWB applications in this paper. Beveling tech... more Beveled edge rounded bowtie antenna is proposed for UWB applications in this paper. Beveling technique is employed to increase the bandwidth of classical bowtie antenna. The simulated bandwidth is from 3 GHz to 11 GHz in order to observe the bandwidth enhancement in the frequency range of interest for UWB applications. Effective parameters of the antenna, including Return Loss (S11), Voltage Standing Wave Ratio (VSWR) and radiation pattern are examined for the proposed structure. Then behavior of the designed antenna is compared with the classical bowtie antenna and rounded bowtie antenna characteristics to verify the enhancement due to the beveled edge structure. Besides, it is demonstrated that the proposed antenna satisfies UWB requirements by providing return loss less than -10 dB and VSWR less than 2, respectively during the enhancement process. Beveled edge rounded bowtie antenna model is designed by using CST Microwave Studio Program which is an electromagnetic simulation auxiliary tool.
Applied Sciences
This study introduces innovative designs for frequency-reconfigurable antennas that utilize ring ... more This study introduces innovative designs for frequency-reconfigurable antennas that utilize ring resonators combined with either PIN diodes or RF switches. These designs enhance the versatility, adaptability, and overall performance of the antennas in wireless communication systems. By controlling the switches and ring resonator, the antenna’s resonant frequencies and bandwidths can be adjusted, allowing for compatibility with various communication standards and frequency ranges. The proposed antenna exhibits four distinct operational states, each characterized by different resonance frequencies and operating frequency bands. Return loss, radiation pattern, radiation efficiency, and surface current distribution are analyzed for each state. State-1 (ON-ON) and State-2 (OFF-ON), which are characterized by resonance frequencies of 2.4 GHz and 3.33 GHz respectively, offer ranges suitable for Wi-Fi, Bluetooth, ISM, and IoT applications. State-3 (ON-OFF), with a resonance frequency of 3.0...
Applied Sciences
This paper presents a novel frequency reconfigurable antenna design for sub-6 GHz applications, f... more This paper presents a novel frequency reconfigurable antenna design for sub-6 GHz applications, featuring a unique combination of antenna elements and control mechanisms. The antenna is composed of an outer split-ring resonator loaded with an inner spiral resonator, which can be adjusted through the remote control of PIN diode or Single Pole Double Throw (SPDT) switches. The compact antenna, measuring 22 × 16 × 1.6 mm3, operates in broadband, or tri-band mode depending on the ON/OFF states of switches. The frequency reconfigurability is achieved using two BAR64−02V PIN diodes or two CG2415M6 SPDT switches acting as RF switches. SPDT switches are controlled remotely via Arduino unit. Additionally, the antenna demonstrates an omni-directional radiation pattern, making it suitable for wireless communication systems. Experimental results on an FR-4 substrate validate the numerical calculations, confirming the antenna’s performance and superiority over existing alternatives in terms of c...
International Journal of Electronics
European Journal of Science and Technology, 2021
In this study, a matematerial structure, which consists of rectangular split ring resonator array... more In this study, a matematerial structure, which consists of rectangular split ring resonator arrays, is investigated numerically and experimentally in the frequency range from 1 GHz to 5GHz. FR-4 material is used as the substrate material due to its low cost. During the numerical analysis (simulation analysis), a parametric study is performed to determine the optimal dimension of the unit cell structure. S11 (reflection coefficient), S21 (transmission coefficient), and n (refractive index) are examined in the frequency range of interest. As a result of the parametric study, the value of n is obtained as approximately zero. By increasing the split ring width, nearzero index is observed at higher frequencies. Hence, it is also deduced that the metamaterial structure behaves as a super lens antenna at the related frequency. Numerical analysis is performed via CST Microwave Studio (MWS). The simulation results are confirmed with experimental results obtained by network analyzer.
In this paper, thin dipole is investigated in the 3.1-10.6 GHz Ultra-Wide Band frequency range. T... more In this paper, thin dipole is investigated in the 3.1-10.6 GHz Ultra-Wide Band frequency range. The study includes the design of the half wave dipole antenna with different dipole radii to improve the antenna characteristics. Antenna parameters including return loss, VSWR, -10 dB bandwidth and radiation pattern are examined according to FCC regulations and UWB system requirements in this range. Additionally, two optimization techniques, Genetic Algorithm, and Particle Swarm Optimization are applied to obtain the best dipole radius. CST Microwave Studio, an electromagnetic simulation program, is used for the design of the antenna structure and the simulation purposes. The simulation is performed transient mode. The results show that the antenna performance can be improved by selecting the suitable antenna dimensions. Additionally, Genetic Algorithm and Particle Swarm Optimization techniques are compared in terms of time consuming to obtain the best VSWR and return loss values. The re...
Frequenz, 2020
In this study, estimation of Ultra-Wideband (UWB) characteristics of microstrip elliptic patch an... more In this study, estimation of Ultra-Wideband (UWB) characteristics of microstrip elliptic patch antenna is investigated by means of k-nearest neighborhood algorithm. A total of 16,940 antennas are simulated by changing antenna dimensions and substrate material. Antennas are examined by observing Return Loss and Voltage Standing Wave Ratio (VSWR) characteristics. In the study, classification of antennas in terms of having UWB characteristics results in accuracies higher than 97%. Additionally, Consistency based Feature Selection method is applied to eliminate redundant and irrelevant features. This method yields that substrate material does not affect the UWB characteristics of the antenna. Classification process is repeated for the reduced feature set, reaching to 97.44% accuracy rate. This result is validated by 854 antennas, which are not included in the original antenna set. Antennas are designed for seven different substrate materials keeping all other parameters constant. Comput...
Sakarya University Journal of Science, Aug 30, 2021
This study presents an origami inspired sub-6 GHz accordion monopole antenna for 5G applications.... more This study presents an origami inspired sub-6 GHz accordion monopole antenna for 5G applications. Parametric study is performed by varying monopole height, fold width and bevel angle to examine the antenna performance in the 1 GHz - 6 GHz frequency range. The proposed antenna is designed with the values that yield the best performance in accordance with the results of parametric study. Antenna behavior is then evaluated in terms of Return Loss, gain and radiation pattern. The proposed antenna operates in 1.22 GHz - 6 GHz frequency range which covers almost the entire sub-6 GHz range with an approximate impedance bandwidth of 132%. Hence, the designed antenna structure has a good performance in the sub-6 GHz and it is a promising design for 5G applications.
2016 24th Signal Processing and Communication Application Conference (SIU), 2016
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Papers by Duygu Nazan Gencoglan