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Doctoral Candidate in Quasioptical and On-Wafer Sub Millimeter Wave Metrology

Aalto University is a community of bold thinkers where science and art meet technology and business. We are committed to identifying and solving grand societal challenges and building an innovative future. Aalto has six schools with nearly 11 000 students and a staff of more than 4000, of which 400 are professors. Our campus is located in the Helsinki metropolitan area in Espoo, Finland.

Doctoral Candidate in Quasioptical and On-Wafer Sub Millimeter Wave Metrology

The THz and Millimeter wave Techniques group is in search of a doctoral student for research and development of measurement techniques in support of future European Space Agency (ESA) missions. The research program is an integral part of MilliLab; an ESA External Laboratory on Millimeter Wave Technology and leverages a team of researchers and experts from Aalto University, VTT Technical Research Centre of Finland, and Chalmers University. Future ESA missions require submillimeter wave devices that cannot be sufficiently qualified with today’s techniques and this research program is directed towards this critically needed development.

Research background
Many ESA missions utilize satellite-mounted radiometers that observe various aspects of the Earth and its atmosphere. Radiometer operating frequencies are being pushed continually upwards to assess specific molecular and morphological signatures of interest in the atmosphere. The focus of this research is to develop measurement techniques for device qualification, in particular on-wafer and quasioptical measurements in the 325 GHz – 500 GHz band. At these high frequencies, the standard on-wafer calibration techniques (e.g. Through-Reflect-Line) can be confounded by coupling and radiation errors. Further, calibration techniques that are robust to coupling/radiation errors (e.g. LRRM) are difficult to implement at high frequencies. Additionally, the devices/antennas in the 325 GHz – 500 GHz band are sufficiently small to fit in a cryostat and thus laboratory-based, quasioptical cryogenic testing is feasible. However, calibration techniques for quasioptical measurements are underdeveloped.

Research position details
This Doctoral Candidate position covers two key development areas: (1) design, simulation, fabrication and testing of calibration structures for on-wafer probing in the 325 GHz – 500 GHz. Structures will be designed and simulated in HFSS in collaboration with VTT, fabricated by industrial partners, and tested at both Aalto and Chalmers. (2) Design, simulation, and testing of quasioptical system and associated calibration methods for non-contact testing of cryogenically cooled devices. The candidate will assemble and maintain both a cryogenic system and quasioptical system and develop non-contact methods to ascertain scattering parameters and impedance of a cooled device under test.

Research group
In Aalto: This research position will be supported by the Millimeter Wave and THz Techniques research group at Aalto, which is led by Professor Zachary Taylor. The Millimeter wave and THz techniques group is a key member of MilliLab Finland; one of only eleven ESA centers of excellence. MilliLab has facilities in both Aalto University and neighboring VTT and the doctoral candidate will have access to state-of-the-art RF engineering facilities and use of vector network analyzer extenders from 50 GHz – 1100 GHz.
Collaborators: This work is in collaboration with Prof. Helena Rodilla at Chalmers University and numerous researchers at VTT Technical Research Centre of Finland. These collaborators and their facilities ensure that the doctoral candidate will have experienced support, in addition to that by the researchers and other doctoral students of the Aalto THz group, on every aspect of the research project.

Requirements
• Master degree in electrical engineering, physics, or related topics is favorable
• Comfortable with both theory and experiments. Experimental experience a plus.
• High level competency in MATLAB
• Good command of English
• Experience with Electromagnetic simulation software a plus

Outcomes and opportunities afforded by this research program
• High level competence with the electromagnetic theory and simulation
• High level competence in interdisciplinary lab work
• Travel abroad to train in THz techniques
• Eminently employable in microwave research or industrial settings
• Exposure and networking with international collaborators

Salary and contract terms
Starting salary for a Doctoral Candidate is approximately 2500 €/month, depending on experience and qualifications. Salary will increase according to responsibilities and performance over time. The contract includes occupational health benefits, holiday bonus, and Finland has a comprehensive social security system. Preferable starting time is in March, 2020, but is negotiable.

Ready to apply?
Please send your application through the "Apply now!" link below and include the following attachments
• Application cover letter
• Course transcripts of Bachelor and Master degrees with grades
• Curriculum Vitae (with the list of publications if you have)
• Description of Master’s thesis project
• References

Deadline for applications is February 17 but we will start reviewing candidates immediately. Applications will be considered until the position is filled.

More information
For additional information, please contact Professor Zachary Taylor, [email protected] For additional information on recruitment process, please contact HR Coordinator Annika Salmelin, [email protected]

About Finland
Aalto University is an international community: more than 30% of our academic personnel are non-Finns. Finland is a great place for living with or without family – it is a safe, politically stable and well organized Nordic society. Finland is consistently ranked high in quality of life and was just listed as the happiest country in the world: http://worldhappiness.report/news/finland-again-is-the-happiest-country-in-the-world/. For more information about living in Finland: https://www.aalto.fi/services/about-finland

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