Carbon Nanotube Thin Film Patch Antennas Viable for 5G, Drones, Sensors and IOT

Antennas made of carbon nanotube films are just as efficient as copper for wireless applications, according to researchers at Rice University’s Brown School of Engineering. They’re also tougher, more flexible and can essentially be painted onto devices.

The new antennas could be suitable for 5G networks but also for aircraft, especially unmanned aerial vehicles, for which weight is a consideration; as wireless telemetry portals for downhole oil and gas exploration; and for future “internet of things” applications.

The Rice lab of chemical and biomolecular engineer Matteo Pasquali tested antennas made of “shear-aligned” nanotube films. The researchers discovered that not only were the conductive films able to match the performance of commonly used copper films, they could also be made thinner to better handle higher frequencies.

At the target frequencies of 5, 10 and 14 gigahertz, the antennas easily held their own with their metal counterparts, he said. “We were going up to frequencies that aren’t even used in Wi-Fi and Bluetooth networks today, but will be used in the upcoming 5G generation of antennas,” he said.

recent improvements in fluid phase CNT processing have yielded macroscopic CNT materials with better alignment and conductivity that can match copper. Early work on carbon nanotube (CNT) antennas indicated that their performance could not match that of metals such as copper. There is currently a gap in the literature on CNT antennas for direct experimental measurements of radiation efficiency. In this study, we conducted radiation efficiency measurements of microstrip patch antennas made of shear-aligned CNT films. We measured a radiation efficiency of 94% at 10 GHz and 14 GHz, matching equivalent copper antennas. Furthermore, the minimum CNT film thickness required to match the performance of copper drops with increasing frequency due to reduced losses from the skin effect. These findings pave the way for applications of aligned CNT patch antennas in the aerospace industry, where low weight, mechanical durability, and temperature-independent performance are critically important.

4 thoughts on “Carbon Nanotube Thin Film Patch Antennas Viable for 5G, Drones, Sensors and IOT”

  1. I took a closer look and it appears you can only transmit with this since the VLF waves are a side effect of pulsing the piezo material at other frequencies, possibly similar to aliasing.

  2. I recently got into ham radio and SDR and am developing an interest in VLF transceivers for long distance low speed communication. There are a couple guys that recently were able to communicate at 8.97kHz around the world on 150 µW effective radiated power.

    I was looking around and exploring building my own PCB antenna and/or a wound antenna with about a mile of copper when I found a few articles referencing a new advancement using a piezo electric crystal. Apparently they are able to tune VLF frequencies with a solid 4″ crystal of lithium niobate.

    If they can do VLF which starts at about 10km wavelength for 30kHz on such a tiny crystal they might be able to use the same idea to do 5G which is a millimeter wave on something in the micrometer or even nanometer range. That might allow a really really really tiny chip that could tune 5G.

    If anyone is interested here are some links regarding the VLF stuff and the crystal antenna:

    New lithium niobate crystal antenna

    VLF amateur success

    Tuning a bowl of custard to HF

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