PhD Position in Establishing Reliable On-Wafer Characterization Techniques for Downscaled Millimeter-Wave and Sub-Terahertz Transistors

Wednesday 15 Dec 21

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The Electromagnetic Systems Section at the Department of Electrical Engineering, Technical University of Denmark (DTU Electrical Engineering) and the Ferdinand-Braun Institut gGmbH, Leibniz-Institut für Höchstfrequenztechnik (FBH) invite applications for a PhD position in “Establishing Reliable On-Wafer Characterization Techniques for Downscaled Millimeter-wave and Sub-Terahertz Transistors”. The successful candidate will be employed by FBH, while simultaneously being enrolled in the PhD program at DTU. The successful candidate will be primarily based at FBH in Berlin, Germany.     

The terahertz region of the electromagnetic spectrum below optical frequencies is currently not yet exploited, but allows for a multitude of applications such as wireless cognition, sensing, imaging, high-capacity communication and high-accuracy positioning. To exploit this frequency region, FBH is developing Indium-Phosphide-based heterojunction bipolar transistors (InP-HBTs) for (sub-)THz electronics using in house semiconductor technologies. In the framework of the PhD position reliable on-wafer characterization techniques for these InP-HBTs have to be established.  

The project includes three overall objectives:

  • To perform a thoroughly analysis of the deteriorating electromagnetic effects associated with present on-wafer characterization techniques for down-scaled InP-HBTs at millimeter-wave and sub-terahertz frequencies.
  • To develop novel on-wafer calibration and de-embedding strategies for accurate and trustworthy characterization of these InP-HBTs.
  • To develop improved high-frequency models to support the InP (sub-)THz electronic development.

You must have a two-year master's degree (120 ECTS points) in electrical engineering or physics or a similar degree with an academic level equivalent to a two-year master's degree.

The successful candidate will need to have a strong background in RF & microwave techniques and knowledge of high-frequency semiconductor devices. Candidates with experience in one or more of the following areas will be preferred:

  • RF & microwave measurements
  • Electromagnetic field simulations
  • Modeling of high-frequency transistors

Approval and Enrolment
The PhD position is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see DTU's rules for the PhD education.

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

The Ferdinand-Braun-Institut gGmbH, Leibniz-Institut für Höchstfrequenztechnik is a leading international research institute that studies diode lasers, LEDs and microwave devices. On the basis of III/V semiconductors, it researches and implements components and systems for applications in communications, traffic and production technology, medicine and biotechnology. It covers the entire value chain from design to ready-for-delivery systems.

Salary and appointment terms
The candidate will be employed by FBH. Employment, remuneration and social benefits are based on the collective agreement for the public sector in Germany (TVöD Bund).

Further information
Further information may be obtained from Associate Professor Tom K. Johansen ( from DTU Electrical Engineering or Dr. Ing. Thomas Flisgen (, Group Leader Electromagnetic Simulations, FBH. 

You can read more about DTU Electrical Engineering at For more details about FBH, visit:

Application procedure
Your complete online application must be submitted no later than 23 January 2022 (Danish time). Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online", fill out the online application form, and attach all your materials in English in one PDF file. The file must include:

  • A letter motivating the application (cover letter)
  • Curriculum vitae
  • Grade transcripts and BSc/MSc diploma including official description of grading scale

You may apply prior to ob­tai­ning your master's degree but cannot begin before having received it.

Applications received after the deadline will not be considered.

All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply.

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DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear vision to develop and create value using science and engineering to benefit society. That vision lives on today. DTU has 12,900 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. DTU has campuses in all parts of Denmark and in Greenland, and we collaborate with the best universities around the world.