An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio

Richard W Ziolkowski, Ming Chun Tang, Ning Zhu

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

4 Citations (Scopus)

Abstract

Non-Foster element-augmented, electrically small electric and magnetic antennas have been designed, characterized numerically, fabricated and tested. Specifically tailored broad bandwidth inductive and capacitive devices were introduced into the near-field resonant parasitic (NFRP) components of their narrow bandwidth counter-parts. This internal non-Foster element approach led to nearly complete matching of the entire system to a 50 ω source without any matching network and high radiation efficiencies over a 10dB fractional bandwidth that surpasses the fundamental passive bound. By including additional resonant parasitic elements, one can also enhance the directivity. Further augmentation of those parasitic elements with a non-Foster device leads to a large directivity bandwidth. A 300 MHz design with ka = 0.94 is reported which simultaneously achieves high radiation efficiencies (>81.63%), high directivity (> 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 Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings
Pages885-887
Number of pages3
StatePublished - 2013
Event2013 21st International Symposium on Electromagnetic Theory, EMTS 2013 - Hiroshima, Japan
Duration: May 20 2013May 24 2013

Other

Other2013 21st International Symposium on Electromagnetic Theory, EMTS 2013
CountryJapan
CityHiroshima
Period5/20/135/24/13

Fingerprint

Antennas
Bandwidth
Radiation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Ziolkowski, R. W., Tang, M. C., & Zhu, N. (2013). An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio. In 2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings (pp. 885-887). [6565884]

An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio. / Ziolkowski, Richard W; Tang, Ming Chun; Zhu, Ning.

2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings. 2013. p. 885-887 6565884.

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

Ziolkowski, RW, Tang, MC & Zhu, N 2013, An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio. in 2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings., 6565884, pp. 885-887, 2013 21st International Symposium on Electromagnetic Theory, EMTS 2013, Hiroshima, Japan, 5/20/13.
Ziolkowski RW, Tang MC, Zhu N. An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio. In 2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings. 2013. p. 885-887. 6565884
Ziolkowski, Richard W ; Tang, Ming Chun ; Zhu, Ning. / An efficient, electrically small antenna with large impedance bandwidth simultaneously with high directivity and large front-to-back ratio. 2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings. 2013. pp. 885-887
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