Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

A Printable Transparent Wi-fi Antenna

Technology Category/Market

Category – Advanced Material and Manufacturing, Information and Communications Technology

Applications –Advanced Materials, Wireless/ Communications systems, Automobiles

Industry –Manufacturing /Chemical, Information and Communications Technology

Market -The global advanced materials market size was accounted at USD 61.35 billion in 2022 and it is expected to reach around USD 112.7 billion by 2032.

Image Gallery

Problem Statement

  • Currently, ever-increasing number of devices in small spaces, all operating in same frequency band, has led to problems like interference, congestion, Wi-Fi fading, dead spots etc.
  • Hence, there is need to fabricate flexible transparent Wi-Fi antennas using high conductivity materials, preferably metals to provide a strong, stable wireless connection in often difficult to reach locations.


  • This invention discloses a printable, transparent and flexible antenna for Wi-Fi applications, radiating at  2.4 GHz and 5.8 GHz, using a printable nanocomposite ink, based on metallic NWs and conducting polymers.
  • Includes a method of preparing a nanocomposite ink comprising:
  1. 1 wt% PEDOT: PSS long chain polymer dispersed in water
  2. 5 wt% metallic nanowires in the solution
  • The prepared PEDOT :PSS is added to metallic nano wires at 12 vol% ratio
  • The metallic nanowires are sonicated to reduce dimensions <1/50th of apparent nozzle diameter.
  • Also, includes a method of fabricating the printable Wi-Fi antenna by the steps of:
  1. Printing two passes of the nanocomposite ink with 4.5 mg/ml concentration of metallic nanowires at 60oC
  2. Annealing the printed pattern (100oC /1hr) and connecting an adapter to antenna thereafter.

Key Features/Value Proposition

  • Dual band Wi-Fi antenna printed with optimized nano-composite ink comprising metallic nanowires and long chain polymer PEDOT: PSS exhibits improved sheet resistance, flexibility, omni– directional radiation, durability, thermal stability conductivity and transparency
  • Any metallic NW-based antenna can be fabricated especially 2D antenna configurations such as dipole, monopole, microstrip, patch, and for RFID antennas.
  • Requires less time, simple and has the potential for direct patterning

Questions about this Technology?

Contact for Licensing

Research Lab

Prof. Parasuraman Swaminathan

Department of Metallurgical and Materials Engineering

Prof. Debdutta Ray

Department of Electrical Engineering

Intellectual Property

  • IITM IDF Ref. 1796
  • IN 428191 (Granted)

Technology Readiness Level

TRL- 2

Technology Concept Formulated

error: Content is protected !!