Progress towards an electrically small antenna with high efficiency and large bandwidth simultaneously with high directivity and a large front-to-back ratio

Richard W. Ziolkowski, Ming Chun Tang, Ning Zhu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Non-Foster element-augmented, electrically small electric and magnetic antennas have been designed, characterized numerically, fabricated and tested. Internal non-Foster elements, which produce specifically tailored broad bandwidth inductive and capacitive devices, are introduced into the near-field resonant parasitic (NFRP) components of their narrow bandwidth counter-parts. This internal non-Foster element approach leads to nearly complete matching of the entire system to a 50 Ω source without any matching network and high radiation efficiencies over a FBW10dB bandwidth that surpasses the fundamental passive bound. By including additional parasitic elements, one can also enhance the directivity of the original passive NFRP antenna. Further augmenting such a parasitic element with a non-Foster element, one can additionally achieve a large directivity bandwidth. A 300 MHz design with ka = 0.94 is reported which simultaneously achieves high radiation efficiencies (>81.63%), high directivities (> 6.25 dB) and large front-to-back-ratios (> 26.71 dB) over a 10.0% fractional bandwidth.

Original languageEnglish (US)
Title of host publication2013 International Workshop on Antenna Technology, iWAT 2013
Pages175-178
Number of pages4
DOIs
StatePublished - Jun 21 2013
Event2013 International Workshop on Antenna Technology, iWAT 2013 - Karlsruhe, Germany
Duration: Mar 4 2013Mar 6 2013

Publication series

Name2013 International Workshop on Antenna Technology, iWAT 2013

Other

Other2013 International Workshop on Antenna Technology, iWAT 2013
CountryGermany
CityKarlsruhe
Period3/4/133/6/13

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Ziolkowski, R. W., Tang, M. C., & Zhu, N. (2013). Progress towards an electrically small antenna with high efficiency and large bandwidth simultaneously with high directivity and a large front-to-back ratio. In 2013 International Workshop on Antenna Technology, iWAT 2013 (pp. 175-178). [6518326] (2013 International Workshop on Antenna Technology, iWAT 2013). https://doi.org/10.1109/IWAT.2013.6518326