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 contributionpeer-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
StatePublished - 2013
Externally publishedYes
Event2013 IEEE Antennas and Propagation Society International Symposium, APSURSI 2013 - Orlando, FL, United States
Duration: 7 Jul 201313 Jul 2013

Publication series

NameIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
ISSN (Print)1522-3965

Conference

Conference2013 IEEE Antennas and Propagation Society International Symposium, APSURSI 2013
Country/TerritoryUnited States
CityOrlando, FL
Period7/07/1313/07/13

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