Amplitude and phase control in SIW structures by tuning multilayered graphene

Area of Science:

• Materials Science
• Electrical Engineering
• Physics

Background:

• Graphene's unique 2D properties, including superior mechanical strength, high carrier mobility, and tunable conductivity, make it promising for microwave devices.
• Dynamic amplitude and phase control in substrate integrated waveguides (SIW) using multilayered graphene remains experimentally unproven.

Purpose of the Study:

• To propose and experimentally validate a novel multilayered graphene-based half-mode SIW (H-SIW) attenuator and phase shifter.
• To demonstrate the dynamic manipulation of amplitude and phase of microwave signals using graphene.

Main Methods:

• Fabrication of a H-SIW device incorporating multilayered graphene.
• Tuning graphene's sheet resistance by applying a bias voltage (0-6.2 V), altering conductivity between 1302 and 60 Ω/□.
• Simulating and measuring the device's performance for amplitude and phase shifting.

Main Results:

• The proposed device successfully manipulates microwave signals, achieving a dynamic amplitude range of 13 dB.
• A dynamic phase shift range of 45 degrees was achieved.
• Demonstrated tunable amplitude and phase without localized surface-mounted devices (SMD) or complex fabrication.

Conclusions:

• The study validates the dynamic control of microwave signal amplitude and phase in SIW devices using multilayered graphene.
• This approach offers a simplified and effective method for tunable microwave components.
• The findings pave the way for advanced, compact, and reconfigurable microwave systems leveraging graphene's properties.