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

  • Datum: –15.00
  • Plats: Ångströmlaboratoriet Beurlingrummet (rum 10238), Lägerhyddsvägen 1, Polacksbacken
  • Föreläsare: PhD Dragos Dancila
  • Arrangör: Institutionen för teknikvetenskaper
  • Kontaktperson: Dragos Dancila
  • Docentföreläsning

Institutionen för teknikvetenskaper inbjuder härmed alla intresserade till docentföreläsning i ämnet teknisk fysik med inriktning mot mikrovågsteknik.

Föreläsningen, som är ett lärarprov för den som ansökt om att bli antagen som docent, ska kunna följas av studenter och andra med kunskaper på grundutbildningsnivå inom ämnet, men kan även vara av intresse för en bredare publik. Föreläsningen varar 45 minuter med efterföljande frågestund och diskussion, och kommer att ges på engelska.

Sammanfattning

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.

Ordförande: professor Anders Rydberg

Docenturnämndens representant: professor Hana Baránková

Välkomna!