M. Sc. Jochen Altholz
né Jebramcik
Scientific Assistant, Microwave Systems
Address:
Ruhr-University Bochum
Faculty of Electrical Engineering and Information Technology
Microwave Systems
Universitätsstraße 150
D-44801 Bochum
Room:
ID 04/343
Phone:
(+49)(0)234 / 32 - 29910
E-Mail:
jochen.altholz[at]rub.de
2025
[1]
K. Dausien, F. Schenkel, J. Altholz, L. Piotrowsky, N. Pohl, and J. Barowski, “An Overview on Millimeterwave FMCW Radar Techniques for Precise Ranging and Material Imaging,” in 2025 International Conference on Mobile and Miniaturized Terahertz Systems (ICMMTS), Dubai , Mar. 2025, Published. doi: 10.1109/icmmts62835.2025.10925997.
2024
[1]
J. Schorlemer, J. Altholz, J. Barowski, C. Baer, I. Rolfes, and C. Schulz, “A radar echo simulator for the synthesis of randomized training data sets in the context of AI-based applications,” Sensors, vol. 24, no. 3, Art. no. 836, Jan. 2024, doi: 10.3390/s24030836.
[2]
R. Schmitz, J. Schorlemer, J. Altholz, C. Baer, C. Schulz, and I. Ralfes, “Generative adversarial networks for augmentation of simulation scenarios in ground penetrating radar based demining,” in 2024 International Conference on Electrical, Computer and Energy Technologies (ICECET), Sidney, 2024, Published. doi: 10.1109/icecet61485.2024.10698343.
[3]
M. Funk, I. Barengolts, J. Altholz, J. Barowski, C. Schulz, and I. Rolfes, “Ultra-broadband material characterization in W- and D-band using a free-space setup,” in 2024 International Conference on Electromagnetics in Advanced Applications (ICEAA), Lissabon, Oct. 2024, pp. 288–290. doi: 10.1109/iceaa61917.2024.10701940.
[4]
T. Körner, J. Altholz, I. Rolfes, and J. Barowski, “A D-band radar-based channel measurement setup for joint communication and sensing,” in 2024 21st European Radar Conference (EuRAD), Paris, France, 2024, pp. 453–456. doi: 10.23919/eurad61604.2024.10734897.
[5]
S. Gerling, T. Körner, J. Altholz, C. Schulz, J. Barowski, and I. Rolfes, “A compact description of directive antennas in numerical microwave simulations based on complex source beams,” in Proceedings of the 2024 15th German Microwave Conference, Duisburg, Apr. 2024, pp. 101–104. doi: 10.23919/gemic59120.2024.10485312.
2023
[1]
I. Barengolts, J. Altholz, R. Schmitz, I. Rolfes, and J. Barowski, “Investigation on internal wall defects of pipes using FMCW radar imaging methods,” presented at the European Microwave Conference (EuMC), Berlin, Sep. 20, 2023, Published.
[2]
S. Gerling, T. Körner, J. Altholz, C. Schulz, J. Barowski, and I. Rolfes, “Efficient antenna pattern sampling using complex source beams for millimeter wave short range scenarios,” in European Microwave Conference 2023, Berlin, Oct. 2023, pp. 536–539. doi: 10.23919/eumc58039.2023.10290154.
[3]
K. Dausien, J. Altholz, I. Rolfes, and J. Barowski, “Ultra wide band FMCW transceiver modules for milimeter wave spectrum analysis,” in 2023 Sixth International Workshop on Mobile Terahertz Systems (IWMTS), Bonn, Aug. 2023, Published. doi: 10.1109/iwmts58186.2023.10207861.
[4]
J. Altholz, F. Schenkel, N. Pohl, I. Rolfes, and J. Barowski, “Model-based sensor fusion approach for FMCW radar sensors in non-destructive testing,” in European Microwave Conference 2023, Berlin, 2023, Published. doi: 10.23919/eumc58039.2023.10290699.
[5]
T. Körner, J. Altholz, S. Gerling, J. Barowski, C. Schulz, and I. Rolfes, “A fast physical optics framework for optimizing quasi optical millimeter wave measurement setups,” in European Microwave Conference 2023, Berlin, 2023, pp. 532–535. doi: 10.23919/eumc58039.2023.10290450.
2022
[1]
J. Schorlemer, J. Altholz, I. Rolfes, and J. Barowski, “Comparison of short-range SAR imaging algorithms for the detection of landmines using numerical simulations,” in 2021 18th European Radar Conference (EuRAD), Jun. 2022, pp. 393–396. doi: 10.23919/eurad50154.2022.9784532.
[2]
J. Schorlemer, J. Altholz, C. Baer, I. Rolfes, and C. Schulz, “A statistical FDFD simulator for the generation of labeled training data sets in the context of humanitarian demining using GPR,” in 2022 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Limoges, 2022, Published. doi: 10.1109/nemo51452.2022.10038521.
2021
[1]
J. Altholz, I. Rolfes, and J. Barowski, “Aperture synthesis method to investigate on the reflection properties of typical road surfaces,” in 2020 50th European Microwave Conference (EuMC 2020), Online, Feb. 2021, pp. 634–637. doi: 10.23919/eumc48046.2021.9338033.
[2]
O. Garten et al., “Considering non-surface scattering in physical optics approximations,” IEEE transactions on antennas and propagation / Institute of Electrical and Electronics Engineers, vol. 69, no. 8, pp. 4798–4807, Feb. 2021, doi: 10.1109/tap.2021.3060043.
[3]
J. Altholz, J. Wagner, N. Pohl, I. Rolfes, and J. Barowski, “Millimeter wave material measurements for building entry loss models above 100 GHz,” in EuCAP 2021, Online, 2021, Published. doi: 10.23919/eucap51087.2021.9411094.
2020
[1]
J. Altholz, I. Rolfes, N. Pohl, and J. Barowski, “Millimeterwave radar systems for in-line thickness monitoring in pipe extrusion production lines,” IEEE sensors letters / Institute of Electrical and Electronics Engineers, vol. 4, no. 5, Art. no. 6000504, 2020, doi: 10.1109/lsens.2020.2991778.
[2]
M. Elsaadouny, J. Barowski, J. Altholz, and I. Rolfes, “Investigation on the scattering characteristics and unsupervised clustering of 3D printed samples,” International journal of microwave and wireless technologies, vol. 12, no. 9, pp. 862–869, 2020, doi: 10.1017/s1759078720000823.
[3]
T. Bonfig, E. Körner, J. Altholz, L. Kroll, I. Rolfes, and J. Barowski, “Estimation of the relative permittivity from the molecular structure of polymers used in automotive industries,” Materials Research Express, vol. 7, no. 12, Art. no. 125301, Dec. 2020, doi: 10.1088/2053-1591/abcb3b.
2019
[1]
S. Gerling, J. Altholz, O. Garten, J. Barowski, and I. Rolfes, “Investigation on optical methods for multi scale electromagnetic simulations,” in GeMiC 2019, Stuttgart, 2019, pp. 28–31. doi: 10.23919/gemic.2019.8698120.
[2]
S. Gerling, O. Garten, J. Altholz, J. Barowski, and I. Rolfes, “Asymptotic simulation methods as forward models in multilayer material characterization applications,” in 2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP 2019), Bochum, 2019, pp. 109–111. doi: 10.1109/imws-amp.2019.8880112.
[3]
M. Elsaadouny, J. Barowski, J. Altholz, and I. Rolfes, “Investigation on scattering characteristics of a 3D-printed sample based on SAR processing,” in 2019 European Microwave Conference in Central Europe (EuMCE 2019), Prag, Oct. 2019, pp. 273–276. [Online]. Available: https://ieeexplore.ieee.org/document/8874825
[4]
J. Altholz, J. Barowski, J. Wagner, and I. Rolfes, “Radar based material characterization at 145 GHz utilizing an ellipsoidal reflector,” in 2019 49th European Microwave Conference (EuMC 2019), Paris, 2019, pp. 527–530. doi: 10.23919/eumc.2019.8910803.
[5]
J. Altholz, J. Barowski, and I. Rolfes, “Kalibrierung eines FMCW-Radarsensors für Materialmessungen in veränderlichen Abständen,” presented at the Kleinheubacher Tagung 2019, Miltenberg, Sep. 23, 2019, Published.
[6]
J. Altholz, I. Rolfes, and J. Barowski, “A novel calibration technique for FMCW radar systems enabling material characterization in variable distances,” in 2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP 2019), Bochum, 2019, pp. 106–108. doi: 10.1109/imws-amp.2019.8880110.
[7]
O. Garten, J. Altholz, J. Barowski, and I. Rolfes, “Erweiterung der physikalischen Optik für geschichtete Medien,” presented at the Kleinheubacher Tagung, Miltenberg, Sep. 23, 2019, Published.
[8]
M. El Saadouny, J. Barowski, J. Altholz, and I. Rolfes, “Millimeter wave SAR imaging for the non-destructive testing of 3D-printed samples,” in 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA), Granada, Oct. 2019, pp. 1283–1285. doi: 10.1109/iceaa.2019.8879272.
[9]
J. Barowski, J. Altholz, I. Alawneh, F. Sheikh, T. Kaiser, and I. Rolfes, “A compact measurement setup for in-situ material characterization in the lower THz range,” in 2019 Second International Workshop on Mobile Terahertz Systems (IWMTS), Bad Neuenahr, Sep. 2019, Published. doi: 10.1109/iwmts.2019.8823700.
[10]
J. Barowski, J. Altholz, J. Wagner, N. Pohl, and I. Rolfes, “Spatial identification of dielectric properties using synthetic aperture radar,” in 2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP 2019), Bochum, 2019, pp. 139–141. doi: 10.1109/imws-amp.2019.8880121.
2018
[1]
C. Baer et al., “Humanitarian microwave detection of improvised explosive devices in Colombia,” in 2018 International Conference on Electromagnetics in Advanced Applications (ICEAA 2018), Cartagena de Indias, 2018, pp. 372–375. doi: 10.1109/iceaa.2018.8520508.
[2]
J. Altholz, J. Barowski, and I. Rolfes, “Characterization of layered dielectric materials using ultra-wideband FMCW-radar measurements,” in 2018 Asia-Pacific Microwave Conference (APMC 2018), Kyoto, 2018, pp. 1327–1329. doi: 10.23919/apmc.2018.8617322.
[3]
J. Altholz, J. Barowski, and I. Rolfes, “Charakterisierung dünner dielektrischer Schichten mittels FMCW-Radar im Zeitbereich,” presented at the Kleinheubacher Tagung 2018, Miltenberg, Sep. 24, 2018, Published.
2017
[1]
C. Baer, S. Gutierrez, J. Altholz, J. Barowski, F. Vega, and I. Rolfes, “Ground penetrating synthetic aperture radar imaging providing soil permittivity estimation,” in 2017 IEEE MTT-S International Microwave Symposium (IMS 2017), Honolulu, Hawaii, 2017, pp. 1367–1370. doi: 10.1109/mwsym.2017.8058868.
[2]
D. Pohle, J. Barowski, J. Altholz, and I. Rolfes, “Surface reconstruction using thinned random arrays in mm-wave FMCW SAR imaging,” in 2017 14th European Radar Conference (EURAD 2017), Nürnberg, 2017, pp. 303–306. doi: 10.23919/eurad.2017.8249207.
[3]
J. Altholz, J. Barowski, D. Pohle, C. Baer, and I. Rolfes, “A simulation concept based on the FDFD method for ground penetrating radar used in humanitarian demining,” in 2017 14th European Radar Conference (EURAD 2017), Nürnberg, 2017, pp. 37–40. doi: 10.23919/eurad.2017.8249141.
[4]
J. Altholz, J. Barowski, C. Baer, and I. Rolfes, “Implementierung eines schnellen numerischen GPR-Simulators zur stochastischen Analyse von improvisierten Sprengsätzen in Kolumbien,” in Tagungsprogramm, Zusammenfassung der Beiträge, Kleinheubacher Tagung 2017, 2017, pp. 40–41. [Online]. Available: https://www.kh2017.de/KH2017_book_of_abstracts.pdf
[5]
J. Altholz, J. Barowski, C. Baer, and I. Rolfes, “An FDFD-based simulation concept for stochastic investigations on improvised explosive devices in Colombia,” in Mine Detection Symposium 2017, 2017, Published.
2015
[1]
J. Altholz, J. Barowski, and I. Rolfes, “Entwicklung einer elektronisch schwenkbaren Antenne auf Basis einer planar gespeisten sphärischen Linse für Radarmessungen,” Book of Abstracts. URSI, Miltenberg, pp. 31–32, Sep. 28, 2015.
