2018 Volume 16 Pages 274-278
We propose antennas that use carbon-nanotube-composite papers, i.e., “paper antennas.” We use metal molds to punch press antenna-shaped carbon-nanotube-composite papers in concrete. Carbon-nanotube-composite paper is a composite material that is made by mixing carbon nanotubes with pulp from ordinary paper, and it can be easily fabricated by using a technique that is similar to the techniques for making Japanese washi paper. We prepare 8 × 6 cm2 of rectangle-shaped carbon-nanotube-composite paper containing 200 mg of multi-wall carbon nanotubes and 1000 mg of raw pulp. Then, we obtain our “loop antenna paper” from the composite paper by punch pressing. Our antennas have a four-turned coil with 2-mm wide wire and a 1-mm wide gap between the wires. The measurements of our paper antenna showed 370 mH of inductance and 6.6 μF of capacitance at 100 Hz. In addition, we measured the electromagnetic induction in our paper antennas. We believe that our antennas can be utilized in contactless paper IC cards that will be used in an IoT-based future. [DOI: 10.1380/ejssnt.2018.274]
