November 09, 2017

Electrochromic Thin Films WO3-LiNbO3-NiO Broadband Microwave Characterization at Various Temperatures

  • Bulja S.
  • Cahill R.
  • Kopf R.
  • Norooziarab M.

This paper describes, for the first time, dielectric characterization of an electronically tunable electrochromic (EC) thin film material using a temperature- controlled microstrip line method between 7C to 50C in a broad frequency band of 1-67 GHz. The two ends of the microstrip line, directly exposed to the tunable EC material, are connected to two broadband CPW to microstrip line transitions. The transitions allow the application of a dc bias voltage for electric stimulation of the material and facilitate on-wafer RF measurements using a standard CPW probe station. In addition, SiO2 is used as a known material to evaluate dielectric extraction algorithm and to establish an understanding of wave propagation mechanism in thin film microstrip lines (TFMLs). This information can help the designer to properly exploit the potentials of the newly introduced tunable material. Finally, the experimental results suggest a broader operating temperature range for this first generation of tunable EC material compared to some liquid crystals such as K15

View Original Article

Recent Publications

January 01, 2019

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

January 01, 2019

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

January 01, 2019

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...