Circular wire-bundle superscatterer

Sergei Kosulnikov*, Dmytro Vovchuk, Roman E. Noskov, Andrey Machnev, Vitali Kozlov, Konstantin Grotov, Konstantin Ladutenko, Pavel Belov, Pavel Ginzburg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Scattering cross-section is one of the main properties, characterizing an object in wireless applications. Resonant phenomena increase the electromagnetic visibility of a scatterer while keeping its footprint small. However, the single-channel limit or Chu-Harrington limit imposes a tight upper bound on a scattering cross-section of subwavelength objects. Being derived for a dipolar response, this limitation can be bypassed if several resonances of a structure are spectrally co-located and contribute constructively to the scattering. Subwavelength structures, obeying this design concept though hardly achievable in practical implementations, are called superscatterers. Here we demonstrate a superscatterer realization, based on a circular bundle of vertically aligned metal wires, optimized to demonstrate 5 multipoles, resonating at nearly the same frequency. As a result, the scattering cross-section becomes 12 times larger than object's geometrical cross-section. Owing to the multipolar multiplexing within the structure, the scattering is 7 times larger than the dipole single-channel limit. Additionally, as a result of the constructive interference of several multipoles, scattering directivity up to 10 dB is observed. Wire-bundle superscatterers may become an attractive architecture for many applications, including compact directive antennas, radar chaff and beacons, long-range RFID tags, and many others.

Original languageEnglish
Article number108065
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
StatePublished - Mar 2022


FundersFunder number
Office of Naval ResearchN62909–21–1–2038
U.S. Navy
Ministry of Science and Technology, Israel
PAZY Foundation


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