Microwave Engineering is changing your life - how to improve energy efficiency?

  • Date: –15:00
  • Location: Ångströmlaboratoriet, Lägerhyddsvägen 1 Beurlingrummet (rum 10238), Lägerhyddsvägen 1, Polacksbacken
  • Lecturer: PhD Dragos Dancila
  • Organiser: Institutionen för teknikvetenskaper
  • Contact person: Dragos Dancila
  • Docentföreläsning

The Department of Engineering Sciences hereby invite all interested to a docent (associate professorship) lecture in subject Engineering Physics with specialization in Microwave Engineering

Abstract: Radio frequency (RF) and Microwave Engineering generally covers the behaviour of signals with frequencies in the range of 100 MHz to 1 THz. The vast majority of microwave applications are in the communication systems, radars, environmental sensors, and medical systems. The most widespread application today is the cell phone (GSM) and the Wireless Local Area Network (WLAN). High power RF applications using microwaves are gaining momentum, such as the Positron Emission Tomography (PET) using radioisotopes to determine the exact location and size of a tumour. The radioisotopes required are produced using a cyclotron powered by a high power RF source. In oncological treatment, Proton Therapy is using high power amplifiers in combination with linear accelerating cavities or cyclotrons to form a beam of protons to irradiate diseased tissue. On a larger scale, high power RF sources are crucial for the successful operation of the future ESS and the High-Luminosity Large Hadron Collider (HL-LHC) at CERN.

In this lecture, I will focus on solid-state power amplifiers as RF high power sources, a key element of a large number of microwave applications. This is because the ongoing research on semiconductor technology allows foreseeing that in the frequency range of 100 to 2000 MHz, solid-state power amplifier (SSPA) will be the dominant technology of the future, with SSPAs being more efficient, more reliable and cost effective RF power sources.

Finally, I will introduce my own research activities in this area and describe the various challenges we face today. I will provide some answers to the questions related to the increase in power of RF power sources using solid-state amplifiers and to the energy efficiency optimization for particle accelerator applications.

The lecture is an obligatory teaching test for those applying for admittance as docent (associate professor) and it should be possible for students and others with basic academic education in the relevant field to follow it. The lecture will last for 45 minutes and afterwards the audience may ask questions. The lecture will be given in English.

Chairperson: Professor Anders Rydberg

Representative of the Associate Professorship Board: Professor Hana Baránková