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Research project

B Hayden - Lead Niobate-based Tunable Dielectrics

Project overview

BaxSr1-xTiyMn1-yO3 BSTO thin films have been synthesized using a molecular beam epitaxy system. Novel coplanar waveguide tunable phase shifters have been developed using these Mn-doped perovskite films. The presented phase shifters operate with a phase shift angle of 12 degrees at 10GHz. at an applied bias of 10V on an area smaller than 1mm2. Insertion loss of ~3.2 dB is extracted from the S-parameter measurement. Small changes of composition lead to a significant variation of device phase shift, demonstrating the importance of synthesizing suitable structure BSTO film.


Lead researcher
Other researchers

Professor Kees De Groot


Research interests

  • Radio-Frequency and Microwave Devices
  • 2 dimensional Transition Metal Dichalcogenides  Transistors
  • Smart Radiative Cooling and RF control of smart glass using metal oxides such as Al-doped ZnO and W-doped VO2
Connect with Kees

Collaborating research institutes, centres and groups

Research outputs

Ali Mostaed, Ioanna Bakaimi, Brian Hayden, Derek C. Sinclair & Ian M. Reaney, 2020, Physical Review Materials, 4(9)
Type: article
Qi Luo, Steven Gao, Wenting Li, Mohammed Sobhy, Ioanna Bakaimi, C. H.Kees De Groot, Brian Hayden, Ian Reaney & Xuexia Yang, 2019, IEEE Transactions on Vehicular Technology, 68(4), 3574-3585
Type: article
Xingli He, Ioanna Bakaimi, Nur Zatil Ismah Hashim, Yudong Wang, Ali Mostaed, Ian M. Reaney, Qi Luo, Steven Gao, Brian E. Hayden & C. H. Kees De Groot, 2018
Type: conference
Ioanna Bakaimi, Xingli He, Samuel Guerin, Nur Hashim, Qi Luo, Ian M. Reaney, Steven Gao, Brian Hayden & Cornelis De Groot, 2018, Journal of Materials Chemistry C, 2018(6), 6222-6228
Type: article