Extending the Bandwidth of a Superdirective First-Order Probe for Spherical Near-Field Antenna Measurements

Oleksiy S. Kim

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

1 Downloads (Pure)

Abstract

A superdirective array of electrically small dipole radiators can effectively be used as a compact and lightweight first-order probe (a directive antenna radiating predominantly spherical modes with the azimuthal index |µ| = 1) in spherical near-field antenna measurements at low frequencies. This contribution shows that a very narrow frequency bandwidth peculiar to superdirective antennas can be extended to practical values by the proper design of the array elements as well as by relaxing the maximum directivity condition, while keeping |µ| = 1 modes dominating in the radiation spectrum of the antenna. The resulting probe has the relative bandwidth of 3% and directivity above 9 dBi; its height is 0.5λ over a 1λ circular ground plane.
Original languageEnglish
Title of host publicationProceedings of the 2015 International Symposium on Antennas and Propagation
PublisherInstitute of Electronics, Information and Communication Engineers
Publication date2015
Pages603-605
Publication statusPublished - 2015
EventInternational Symposium on Antennas and Propagation : Advancing Antenna and Propagation Research for a Connected World - Hobart, Australia
Duration: 9 Nov 201512 Nov 2015
http://isap2015.org/

Conference

ConferenceInternational Symposium on Antennas and Propagation
CountryAustralia
CityHobart
Period09/11/201512/11/2015
Internet address

Cite this

Kim, O. S. (2015). Extending the Bandwidth of a Superdirective First-Order Probe for Spherical Near-Field Antenna Measurements. In Proceedings of the 2015 International Symposium on Antennas and Propagation (pp. 603-605). Institute of Electronics, Information and Communication Engineers.