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Enhanced Graphene Based Electronically Tunable Phase Shifter.

Muhammad Yasir1, Fabio Peinetti2, Patrizia Savi2

  • 1Division of Microrobotics and Control Engineering, Department of Computing Science, University of Oldenburg, 26129 Oldenburg, Germany.

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|October 28, 2023
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Summary
This summary is machine-generated.

This study presents a tunable microwave phase shifter using graphene. Applying DC voltage to graphene pads tunes conductivity, achieving a 59-degree phase shift with minimal amplitude change.

Keywords:
graphenephase shifterthick filmstunable devices

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Microwave Engineering

Background:

  • Microwave phase shifters are crucial components in various electronic systems.
  • Graphene's unique electronic properties offer potential for tunable microwave devices.

Purpose of the Study:

  • To design and demonstrate an enhanced tunable microwave phase shifter.
  • To utilize graphene's tunable conductivity for phase shifting applications.

Main Methods:

  • The phase shifter design incorporates three short-circuited stubs and a tapered line.
  • Graphene pads connected to the stubs allow for conductivity modulation via DC voltage.
  • Analytical models, circuit, and full-wave simulations were used for optimization.
  • Prototype fabrication and measurement were conducted to validate performance.

Main Results:

  • A dynamic phase variation of 59 degrees was achieved.
  • The amplitude variation was maintained below 1 dB during phase tuning.
  • Optimization of physical parameters maximized reactance variation.

Conclusions:

  • The proposed graphene-based microwave phase shifter demonstrates effective tunable performance.
  • This technology holds promise for advanced microwave and RF applications.