Ultracompact all-dielectric superdirective antennas: Theory and experiment

A. E. Krasnok, P. A. Belov, D. S. Filonov, C. R. Simovski, A. P. Slobozhanyuk, Yu S. Kivshar

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

We demonstrate a simple way to achieve superdirectivity of electrically small antennas based on a spherical dielectric particle with a notch. We predict this effect theoretically for nanoantennas excited by a point-like emitter located in the notch, and then confirm it experimentally at microwaves for a ceramic sphere excited by a small wire dipole. We explain the effect of superdirectivity by the resonant excitation of high-order multipole modes of electric and magnetic fields which are usually negligible for small perfect spherical particles.

Original languageEnglish
Title of host publication2013 IEEE Antennas and Propagation Society International Symposium, APSURSI 2013 - Proceedings
Pages138-139
Number of pages2
DOIs
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventIEEE International Symposium on Antennas and Propagation/USNC-URSI National Radio Science Meeting - Orlando, United States
Duration: 7 Jul 201313 Jul 2013

Publication series

NameIEEE Antennas and Propagation Society International Symposium
ISSN (Print)1522-3965

Conference

ConferenceIEEE International Symposium on Antennas and Propagation/USNC-URSI National Radio Science Meeting
Abbreviated titleAPSURSI
CountryUnited States
CityOrlando
Period07/07/201313/07/2013

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