Carbon nanotube thread as a material for flexible microwave absorbers

Abstract

Microwave absorption properties are studied for flexible materials based on periodic gratings made of carbon nanotube (CNT) threads. Resonant absorption is observed by free space measurements in the frequency range from 26.5 to 40 GHz. Materials comprised of CNT thread gratings with different periods, a metal backplate, and an intermediate dielectric layer exhibit significant reflection losses (less than −45 dB). The shifts of peaks on the absorption spectra caused by changes in the thickness and rotations of the samples indicate the high sensitivity of the obtained results.

Keywords:

• Carbon nanotube
• microwave absorption
• dielectric losses
• magnetic losses

Acknowledgments

This research was carried out using the resources of the Shared Research Facilities “Studies of Nanostructured, Carbon and Superhard Materials” at the Technological Institute for Superhard and Novel Carbon Materials.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

We are thankful for the financial support provided by the Russian Foundation for Basic Research (No. 20-07-01062). For the Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, the study was funded as part of a state assignment.

Notes on contributors

D. Zh. Kurzhumbaev

D. Zh. Kurzhumbaev: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing — original draft.

E. B. Mitberg

E. B. Mitberg: Investigation, Writing — review & editing.

D. S. Kalenov

D. S. Kalenov: Investigation, Methodology, Writing — review & editing.

M. P. Parkhomenko

M. P. Parkhomenko: Conceptualization, Methodology, Project administration, Supervision, Writing — review & editing.

I. S. Eremin

I. S. Eremin: Software, Validation.

S. A. Urvanov

S. A. Urvanov: Investigation, Resources.

A. R. Karaeva

A. R. Karaeva: Visualization, Writing - review & editing.

V. Z. Mordkovich

V. Z. Mordkovich: Conceptualization, Project administration, Resources, Supervision, Writing — review & editing.

S. V. von Gratowski

S. V. von Gratowski: Funding acquisition, Writing — review & editing.