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Inkjet-Printed Graphene-Based 1 × 2 Phased Array Antenna.

Mahmuda Akter Monne1, Peter Mack Grubb2, Harold Stern3

  • 1Materials Science Engineering and Commercialization, Texas State University, San Marcos, TX 78666-4684, USA.

Micromachines
|September 23, 2020
PubMed
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Researchers developed a low-cost, flexible phased array antenna (PAA) using inkjet-printed graphene. This technology integrates antenna and transistor circuits on flexible substrates, enabling new applications in electronics.

Area of Science:

  • Materials Science
  • Electrical Engineering
  • Antenna Technology

Background:

  • Flexible phased array antennas (PAAs) are crucial for various applications but face challenges in integrating antenna and electronic circuits on flexible substrates.
  • The bendability and oxidation of radiating elements and electronic components hinder the development of robust flexible PAA systems.

Purpose of the Study:

  • To develop a low-cost, fully inkjet-printed flexible phased array antenna (PAA) system.
  • To address the integration and material stability challenges in flexible electronics for PAAs.

Main Methods:

  • Developed a graphene ink from graphene flakes for inkjet printing.
  • Utilized inkjet printing to fabricate the radiating elements and field-effect transistors (FETs) for the PAA.
Keywords:
field effect transistorgraphenegraphene inkinkjet printingphased array antennatrue-time delay

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  • Conducted bending and oxidation tests to assess the durability of printed graphene thin films.

    • Main Results:

    • Successfully designed and fabricated a 1x2 element graphene-based phased array antenna (PAA) entirely via inkjet printing on a flexible Kapton® substrate.
    • Graphene-based FETs were employed as switches in the true-time delay line of the PAA.
    • The fabricated PAA demonstrated azimuth steering capabilities for angles including -26.7°, 0°, 13°, and 42.4° with measured patterns matching simulations.

    Conclusions:

    • Inkjet-printed graphene is a viable material for fabricating flexible phased array antennas (PAAs) and associated electronics.
    • The developed method offers a low-cost, room-temperature fabrication process for conformal electronic systems.
    • This research paves the way for advanced flexible electronic devices and antennas.