1) Hasar, U. C., Ali, H., Kaya, Y., & Stoyanov, I. (2024). Simpler Reference-Plane-Invariant Method for Permittivity Extraction of Medium-or Low-Loss Dielectric Samples Using One-Port Measurements. IEEE Access.
2) Hasar, U. C., Kaya, Y., Korkmaz, H., & Iliev, T. (2024). De-Embedding Technique for Parameter Extraction of Biaxial Bianisotropic Metamaterial Slabs. IEEE Access.
3) Hasar, U. C., & Ozturk, H. (2024). Feasible Extraction Method for Permittivity Determination of Reflection-Asymmetric Structures. IEEE Transactions on Microwave Theory and Techniques.
4) Alahmed Albasry, F., Ozturk, G., Hasar, U. C., & Corapsiz, M. F. (2024). Ultra-Thin Metasurface Polarization Converter with Linear and Circular Polarization Features for RCS Applications. Arabian Journal for Science and Engineering, 1-11.
5) Hasar, U. C., & Ozturk, H. (2024). Non-Iterative and Stable Permittivity Extraction of Solid Dielectrics Using a New Formalism Based on Frequency-Domain and Time-Domain Analyses. IEEE Transactions on Antennas and Propagation.
6) Hasar, U. C., Ozturk, H., Korkmaz, H., Nayyeri, V., & Ramahi, O. M. (2024). De-embedding method for a sensing area characterization of planar microstrip sensors without evaluating error networks. Scientific Reports, 14(1), 10062.
7) Hasar, U. C., & Ozturk, H. (2024). Thickness-Independent Reference-Plane-Invariant Noniterative Permittivity Extraction of Low-Loss Solid Dielectric Samples by Combined Use of Frequency-and Time-Domain Analyses. IEEE Transactions on Microwave Theory and Techniques.
8) Hasar, U. C., Hasar, H., Ozturk, H., Korkmaz, H., Kaya, Y., Ozkaya, M. A., ... & Ramahi, O. M. (2024). Simple and inexpensive microwave setup for industrial based applications: Quantification of flower honey adulteration as a case study. Scientific Reports, 14(1), 8847.
9) Hasar, U. C., Ozturk, H., Nayyeri, V., & Ramahi, O. M. (2024). Methodology for Diagnosis of Defect or Damage in Reflection-Symmetric Multilayer Structures Using Analysis of Late-Time Natural-Mode Amplitudes. IEEE Transactions on Instrumentation and Measurement.
10) Hasar, U. C., & Ozturk, H. (2024). De-embedding technique relying on a new formalism for two-port network characterization using raw S-parameter measurements. Measurement, 225, 113942.
11) Ozturk, G., Hasar, U. C., Ertugrul, M., Tutar, F., Corapsiz, M. F., Kurt, M., ... & Alfaqawi, M. S. (2023). An efficient cost effective wide-angle metasurface-based linear and circular polarization converter for X-, Ku-and K-band applications. Optics & Laser Technology, 163, 109404.
12) Hasar, U. C., Ozturk, H., Korkmaz, H., Tasdemir, A., Bute, M., Nis, A., ... & Ozkaya, M. A. (2023). Detection and quantification of alkali-silica-reaction (ASR) gel in cement-based mortars using microwave spectral and temporal transmission properties. Measurement, 214, 112800.
13) Korkmaz, H., Hasar, U. C., & Ramahi, O. M. (2023). Thin-film MXene-based metamaterial absorber design for solar cell applications. Optical and Quantum Electronics, 55(6), 530.
14) Hasar, U. C., Ozturk, G., Kaya, Y., Barroso, J. J., Ertugrul, M., Ramahi, O. M., & Alfaqawi, M. S. (2023). Temporal Reflection Response of Plane Waves Within an N-Layer Structure Involving Bianisotropy. IEEE Transactions on Antennas and Propagation.
15) Hasar, U. C., Ozturk, H., Korkmaz, H., Ozkaya, M. A., & Ramahi, O. M. (2023). Determination of propagation constant and impedance of non-reciprocal networks/lines using a generalized line-line method. Measurement, 113021.
16) Hasar, U. C., Ozturk, H., Ertugrul, M., Barroso, J. J., & Ramahi, O. M. (2023). Artificial Neural Network Model for Evaluating Parameters of Reflection-Asymmetric Samples From Reference-Plane-Invariant Measurements. IEEE Transactions on Instrumentation and Measurement.
17) Hasar, U. C., Kaya, Y., Ozturk, H., Ertugrul, M., & Ramahi, O. M. (2023). Parameter extraction method for reflection-asymmetric bianisotropic metamaterial slabs using one-port measurements. Measurement, 211, 112625.
18) Hasar, U. C., Ozbek, Y., Ozturk, H., Korkmaz, H., & Hudlička, M. (2023). Application of the Kalman Filter/Smoother for accurate material characterization of planar dielectric samples by using free-space measurements at sub-THz frequencies. Measurement, 211, 112577.
19) Hasar, H., Hasar, U. C., Ozturk, H., Izginli, M., Aslan, N., Oztas, T., ... & Ramahi, O. M. (2023). Permittivity Extraction of Soil Samples Using Coaxial-Line Measurements by a Simple Calibration. IEEE Transactions on Geoscience and Remote Sensing.
20) Majeed, K., Niazi, S. A., Altintas, O., Baqir, M. A., Karaslaan, M., & Hasar, U. C. (2022). Multiband polarization-insensitive cartwheel metamaterial absorber. Journal of Materials Science, 1-10.
21) Hasar, U. C., Kaya, Y., Ozturk, G., Ertugrul, M., & Korasli, C. (2022). Broadband, Stable, and Noniterative Dielectric Constant Measurement of Low-Loss Dielectric Slabs Using a Frequency-Domain Free-Space Method. IEEE Transactions on Antennas and Propagation, 70(12), 12435-12439.
22) Hasar, H., Hasar, U. C., Kaya, Y., Ozturk, H., Izginli, M., Oztas, T., ... & Ramahi, O. M. (2022). Honey–Water Content Analysis by Mixing Models Using a Self-Calibrating Microwave Method. IEEE Transactions on Microwave Theory and Techniques, 71(2), 691-697.
23) Hasar, U. C., Ozturk, H., Korkmaz, H., Izginli, M., Karaaslan, M., & Bute, M. (2022). General line-line method for propagation constant measurement of non-reciprocal networks. Measurement, 200, 111618.
24) Hasar, U. C., Ozturk, G., Kaya, Y., Bute, M., Karaaslan, M., Barroso, J. J., ... & Ertugrul, M. (2022). Feasible extraction method for electromagnetic properties of multilayer metamaterials with short-circuit termination. IEEE Transactions on Antennas and Propagation, 70(11), 10650-10659.
25) Hasar, U. C., Eren, N. A., Ozturk, H., Izginli, M., Korkmaz, H., Cevik, A., ... & Irshidat, M. R. (2022). Mechanical and Electromagnetic Properties of Self-Compacted Geopolymer Concretes With Nano Silica and Steel Fiber Additives. IEEE Transactions on Instrumentation and Measurement, 71, 1-8.
26) Coskun, A., Hasar, U. C., Ozmen, A., & Ertugrul, M. (2022). Easy‐to‐Implement Ultra‐Thin, Wide‐Band, and Multi‐Functional Polarization Converter for K and Ka Band Applications. Advanced Theory and Simulations, 5(4), 2100543.
27) Hasar, U. C., Ozturk, H., Korkmaz, H., Izginli, M., & Karaaslan, M. (2022). Improved line–line method for propagation constant measurement of reflection-asymmetric networks. Measurement, 192, 110848.
28) Ismail, I., Zulkimi, M. M. M., Mustaffa, M. S., Hamidon, M. N., Ertugrul, M., Yesilbag, Y. O., ... & Hasar, U. C. (2022). Effect of Mn and Zn doping on natural resonance frequency of strontium U-type hexaferrite and its performance as electromagnetic wave absorbers. Journal of Alloys and Compounds, 898, 163246.
29) Abuhussain, M., & Hasar, U. C. (2022, March). Design of chebyshev bandpass waveguide filter for e-band based on csrr metamaterial. In Proceedings of the International Conference on Intelligent Vision and Computing (ICIVC 2021) (pp. 356-365). Cham: Springer International Publishing.
30) Hasar, U. C., Kaya, Y., Izginli, M., Ozturk, H., Barroso, J. J., Ramahi, O. M., & Ertugrul, M. (2022). Determination of Propagation Constants and Wave Impedance of Non-Reciprocal Networks From Position-Insensitive Waveguide Measurements. IEEE Transactions on Microwave Theory and Techniques, 70(5), 2723-2731.
31) Hasar, U. C., Ozturk, H., Korkmaz, H., Izginli, M., Alfaqawi, M. S. S., & Ramahi, O. M. (2022). Determination of error-corrected full scattering parameters of a two-port device from uncalibrated measurements. Measurement, 190, 110656.
32) Hasar, U. C., Kaya, Y., Ozturk, H., Izginli, M., Ertugrul, M., Barroso, J. J., & Ramahi, O. M. (2022). Improved method for permittivity determination of dielectric samples by free-space measurements. IEEE Transactions on Instrumentation and Measurement, 71, 1-8.
33) Hasar, H., Hasar, U. C., Kaya, Y., Oztas, T., Canbolat, M. Y., Aslan, N., ... & Ramahi, O. M. (2022). Broadband Soil Permittivity Measurements Using a Novel De-Embedding Line–Line Method. IEEE Geoscience and Remote Sensing Letters, 19, 1-5.
34) Hasar, U. C., Ozturk, G., Kaya, Y., & Ertugrul, M. (2021). Calibration-free time-domain free-space permittivity extraction technique. IEEE Transactions on Antennas and Propagation, 70(2), 1565-1568.
35) Hasar, U. C., Izginli, M., Ozturk, H., Korkmaz, H., Cevik, A., & Irshidat, M. R. (2021). Surface curing effect on reflection response of hardened cementitious mortar samples. Measurement, 185, 110026.
36) Hasar, U. C., Kaya, Y., Izginli, M., Ozturk, H., Ertugrul, M., & Ramahi, O. M. (2021). Coupling analysis between resonating metamaterial slabs using scattering parameters. Measurement, 182, 109562.
37) Hasar, U. C., Ozturk, G., Kaya, Y., Barroso, J. J., & Ertugrul, M. (2021). Simple and accurate electromagnetic characterization of omega-class bianisotropic metamaterials using the state transition matrix method. IEEE Transactions on Antennas and Propagation, 69(10), 7064-7067.
38) Hasar, U. C., Kaya, Y., Ozturk, H., Izginli, M., Barroso, J. J., Ramahi, O. M., & Ertugrul, M. (2021). Complex permittivity and thickness evaluation of low-loss dielectrics from uncalibrated free-space time-domain measurements. IEEE Transactions on Geoscience and Remote Sensing, 60, 1-10.
39) Hasar, H., Hasar, U. C., Kaya, Y., Ozturk, H., Izginli, M., Ozbek, I. Y., ... & Ertugrul, M. (2021). Prediction of water-adulteration within honey by air-line de-embedding waveguide measurements. Measurement, 179, 109469.
40) Hasar, U. C., Kaya, Y., Ozturk, G., Ozturk, H., Izginli, M., & Ertugrul, M. (2021). New formalism for characterization of simple non-reciprocal networks free from singularity-point problem. Measurement, 177, 109309.
41) Hasar, U. C., Kaya, Y., Ozturk, G., & Ertugrul, M. (2021). Effect of sample deformation in longitudinal axis on material parameter extraction by waveguides. Measurement, 176, 109175.
42) Sener, E., Bayram, O., Hasar, U. C., & Simsek, O. (2021). Structural and optical properties of RF sputtered ZnO thin films: Annealing effect. Physica B: Condensed Matter, 605, 412421.
43) Hasar, U. C., Ozturk, G., Barroso, J. J., Gurbuz, T. U., Kaya, Y., & Ertugrul, M. (2021). Graphical method for examining complex natural frequencies of dispersive materials. IEEE Microwave and Wireless Components Letters, 31(5), 421-424.
44) Hasar, U. C., Ozturk, G., & Ertugrul, M. (2021). Natural mode series expansion of transient transmission field through an N-layer structure. IEEE Transactions on Antennas and Propagation, 69(6), 3436-3442.
45) Igman, E., Bayram, O., Mavi, A., Hasar, U. C., & Simsek, O. (2021). Photovoltaic performance of non-covalent functionalized single-layer graphene in dye-sensitized solar cells (DSSCs). Journal of Materials Science, 56, 4184-4196.
46) Hasar, U. C., Ozturk, H., Kaya, Y., Izginli, M., & Ertugrul, M. (2021). Parameter Retrieval of Samples on a Substrate From Reflection-Only Waveguide Measurements. IEEE Microwave and Wireless Components Letters, 31(3), 320-323.
47) Hasar, U. C., & Bute, M. (2020). Parameter retrieval of bianisotropic metamaterials without application of the passivity principle. IEEE Transactions on Electromagnetic Compatibility, 63(3), 951-955.
48) Hasar, U. C., Kaya, Y., & Ertugrul, M. (2020). Measurement of propagation characteristics of nonreciprocal networks/lines using a line–line method. IEEE Transactions on Electromagnetic Compatibility, 63(4), 1240-1247.
49) Hasar, U. C., Kaya, Y., Ozturk, G., & Ertugrul, M. (2020). Propagation constant measurements of reflection-asymmetric and nonreciprocal microwave networks from S-parameters without using a reflective standard. Measurement, 165, 108126.
50) Ozturk, G., Hasar, U. C., Bute, M., & Ertugrul, M. (2020). Determination of constitutive parameters of strong-coupled bianisotropic metamaterials using oblique incidence scattering parameters. IEEE Transactions on Antennas and Propagation, 69(2), 918-927.
51) Hasar, U. C., Ozturk, G., Bute, M., Ertugrul, M., & Barroso, J. J. (2020). Analysis of solution pattern of natural frequencies by a graphical method. IEEE Transactions on Antennas and Propagation, 69(2), 1209-1212.
52) Hasar, U. C., Ozturk, G., Bute, M., & Ertugrul, M. (2020). Method for electromagnetic property extraction of sublayers in metal-backed inhomogeneous metamaterials. IEEE Access, 8, 151705-151718.
53) Bayram, O., Igman, E., Guney, H., Demir, Z., Yurtcan, M. T., Cirak, C., ... & Simsek, O. (2020). Graphene/polyaniline nanocomposite as platinum-free counter electrode material for dye-sensitized solar cell: its fabrication and photovoltaic performance. Journal of Materials Science: Materials in Electronics, 31, 10288-10297.
54) Hasar, U. C., Öztürk, H., & Ertugrul, M. (2020). Constitutive Parameter Extraction of Isotropic Inhomogeneous Metamaterials Involving Coupling. EMO Bilimsel Dergi, 9(2), 17-22.
55) Hasar, U. C., & Bute, M. (2020). Method for retrieval of electromagnetic properties of inhomogeneous reciprocal chiral metamaterials. IEEE Transactions on Antennas and Propagation, 68(7), 5714-5717.
56) AbuHussain, M., & Hasar, U. C. (2020). Design of X-bandpass waveguide Chebyshev filter based on CSRR metamaterial for telecommunication systems. Electronics, 9(1), 101.
57) Hasar, U. C., Bozdag, F., Bute, M., Ozturk, H., & Cevik, A. (2020). Sample placement effect during curing on microwave reflection properties of early age engineered cementitious mortar specimens. IEEE Transactions on Instrumentation and Measurement, 69(8), 5763-5771.