CV

Education

• 2019 –
  Ph.D., Graz University of Technology
  Electrical Engineering at Doctoral School “Information and Communication Engineering”
  Thesis title: “Analytical and Experimental Characterization of Millimeter-Wave Passive Components and Interconnections in Multilayer PCBs”

• 2016 – 2019
  M. Eng. in Communication Engineering and Informatics, the University of Electro-Communications, Tokyo
  Thesis title: “Development of quasi mm-wave Planar Antenna for System-in-Package”

• 2012 – 2016
  B. Eng. in Communication Engineering and Informatics, the University of Electro-Communications, Tokyo
  Thesis Title: “Study on Thru-Reflect-Line Calibration Technique for Measurement of Cryogenic Low-Noise-Amplifier”

Work experience

• 2022 –, Senior R\&D Engineer, Full-time
  • AT&S Austria Technologie & Systemtechnik Aktiengesellschaft, Leoben, Austria
• 2019 – 2023, University Project Assistant, Full-time
  • Institute of Microwave and Photonic Engineering, Graz University of Technology, Graz, Austria
• 2017 – 2018, R&D Engineer, Full-time Intern
  • AT&S Austria Technologie & Systemtechnik Aktiengesellschaft, Leoben, Austria
  • Funded by Vulcanus in Europe 2017, an exchange internship program between EU countries and Japan
• 2016 – 2016, RF Engineer, Full-time Intern
  • National Astronomical Research Institute of Thailand, Chiang Mai
  • Funded with a scholarship by Japan Student Services Organization

Awards and Achievement

• Dec. 2022
  • Asia-Pacific Microwave Conference 2022 Student Paper Award, link
• Mar. 2019
  • University Dean’s Award, link (in Japanese)
• Mar. 2019
  • Goethe Institut B2
• Mar. 2019
  • TOEIC Score 875/990
• Dec. 2018
  • German Speech Contest 3rd place, link (in Japanese)

Skills

• Languages
  • Japanese (Native), English (TOEIC 895), German (Goethe-Institut B2)
• Software Skills
  • Python (numpy, scipy, pandas, scikit-rf), MATLAB, R, \LaTeX, C#, C++, Microsoft Office
• RF Engineering
  • Microwave passive component design
  • 3D Simulation Software (Ansys HFSS and CST) and circuit simulator (AWR Microwave Office and ADS)
  • Analysis and Synthesis (MATLAB RF tool-box, Python scikit-rf and Python self-made RF library in GitHub)
  • Measurement and Calibration (Vector Network Analyzer, Spectrum Analyzer, and Far-Field Antenna Measurement)
• Misc.
  • Academic research, scientific writing, oral presentation, teaching, training, publishing.

Publications

Performance and Characterization of a Wide IF SIS-Mixer-Preamplifier Module Employing High-J c SIS Junctions

Takafumi Kojima, Matthias Kroug, Kazunori Uemizu, Yasutaka Niizeki, Hiroaki Takahashi, Yoshinori Uzawa"Performance and Characterization of a Wide IF SIS-Mixer-Preamplifier Module Employing High-J c SIS Junctions." IEEE Transactions on Terahertz Science and Technology, 2017.

New Embedded Inductors for Power Converter Applications

Unknown {G. Weidliner, H. Stahr, A. Zluc, I. Salkovic, M. Schober, H.Takahashi, G.Weis, C. Voclenberger, S. Suchovsky}"New Embedded Inductors for Power Converter Applications." In the proceedings of Micro/Nano-Electronics Packaging and Assembly, Design and Manufacturing Forum (MiNaPAD Forum 2020), 2018.

A Symmetric Wideband Doherty Power Amplifier for the n78 - 5G NR Frequency Band

Ioannis Peppas, Hiroaki Takahashi, Helmut Paulitsch, Wolfgang Bösch"A Symmetric Wideband Doherty Power Amplifier for the n78 - 5G NR Frequency Band." In the proceedings of 2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 2022.

Air-filled cavity-backed 28 GHz Antenna array implemented by 2.5D PCB process and Network Analysis

H. Takahashi, S. Sattler, E. Schlaffer, B. Reitmaier, H. Sarbandifarahani, H. Paulitsch, W. Bösch"Air-filled cavity-backed 28 GHz Antenna array implemented by 2.5D PCB process and Network Analysis." In the proceedings of 2021 51st European Microwave Conference (EuMC), 2022.

Determination of Quasi-Coaxial Via Capacitance using Conformal Mapping Technique

Hiroaki Takahashi, Ioannis Peppas, Erich Schlaffer, Helmut Paulitsch, Wolfgang Bösch"Determination of Quasi-Coaxial Via Capacitance using Conformal Mapping Technique." In the proceedings of 2022 14th German Microwave Conference (GeMiC), 2022.

Embedding of High Power RF Transistor Dies in PCB Laminate

Ioannis Peppas, Hiroaki Takahashi, Jim Yip, Erich Schlaffer, Helmut Paulitsch, Wolfgang Bösch"Embedding of High Power RF Transistor Dies in PCB Laminate." In the proceedings of 2022 52nd European Microwave Conference (EuMC), 2022.

OFDM Symbol-timing and Carrier-frequency Offset Estimation Based on Singular Value Decomposition

Ziad Hatab, Hiroaki Takahashi, Michael Gadringer, Wolfgang Bosch"OFDM Symbol-timing and Carrier-frequency Offset Estimation Based on Singular Value Decomposition." In the proceedings of 2022 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom), 2022.

Development of a Sealed 3D Printed Dielectric Filled Waveguide Filter with Embedded Lattices

Luke Robins, Arash Arsanjani, Hiroaki Takahashi, Reinhard Teschl, Wolfgang Bösch"Development of a Sealed 3D Printed Dielectric Filled Waveguide Filter with Embedded Lattices." In the proceedings of 2022 Asia-Pacific Microwave Conference (APMC), 2022.

Experimental Characterization of Microvias Using TRL Calibration with Uncertainty Analysis

Hiroaki Takahashi, Ziad Hatab, Erich Schlaffer, Helmut Paulitsch, Wolfgang Bösch"Experimental Characterization of Microvias Using TRL Calibration with Uncertainty Analysis." In the proceedings of 2022 Asia-Pacific Microwave Conference (APMC), 2022.

Low-return Loss Design of PCB Probe-to-Microstrip Transition for Frequencies up to 150 GHz

Ziad Hatab, Ahmad Alterkawi, Hiroaki Takahashi, Michael Gadringer, Wolfgang Bösch"Low-return Loss Design of PCB Probe-to-Microstrip Transition for Frequencies up to 150 GHz." In the proceedings of 2022 Asia-Pacific Microwave Conference (APMC), 2022.

Numerical Investigation of D- band Rectangular Dielectric Waveguides and their Bending Effects

Hiroaki Takahashi, Michael Gadringer, Siegfried Krainer, Helmut Paulitsch, Wolfgang Bösch"Numerical Investigation of D- band Rectangular Dielectric Waveguides and their Bending Effects." In the proceedings of 2022 Asia-Pacific Microwave Conference (APMC), 2022.

The Advantages of Air Cavity-Backed Transmission Lines and Antennas for mmWave Applications

B Kaltalioglu, H Takahashi, A Alothman, C Vockenberger"The Advantages of Air Cavity-Backed Transmission Lines and Antennas for mmWave Applications." Microwave Journal, 2023.

A Quasi-TEM Approach for Designing Microvias for PCB Layer Transition with Minimal Return Loss

Ziad Hatab, Hiroaki Takahashi, Ahmad Alterkawi, Michael Gadringer, Wolfgang Bösch"A Quasi-TEM Approach for Designing Microvias for PCB Layer Transition with Minimal Return Loss." In the proceedings of 2023 53rd European Microwave Conference (EuMC), 2023.

Experimental analysis of grounded coplanar waveguide structures based on different PCB processes with uncertainty analysis

Hiroaki Takahashi, Ziad Hatab, Erich Schlaffer, Helmut Paulitsch, Wolfgang Bösch"Experimental analysis of grounded coplanar waveguide structures based on different PCB processes with uncertainty analysis." IEICE Electronics Express, 2023.