Non-foster circuit matching of a near-field resonant parasitic, electrically small antenna

Jeffrey S. Roberts, Richard W Ziolkowski

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

1 Scopus citations

Abstract

The impedance bandwidth of a near-field resonant parasitic (NFRP) element of an electrically small, metamaterial-inspired Egyptian Axe Dipole (EAD) antenna, can be altered significantly by embedding a non-Foster circuit element into it. The frequency agile behavior of the reactance component internal to the NFRP element of an EAD antenna with a center frequency of 300 MHz is established and a negative impedance converter (NIC) circuit is designed to mimic this behavior. Several other non-Foster circuits have been considered for the NIC implementation and will be discussed in our presentation. A Linvill-based design of the requisite NIC, which contains 4 bipolar junction transistors (BJTs), is presented here. ANSYS HFSS was used for the antenna simulation results; Agilent ADS was used for the circuit simulations. The co-designed, optimized results show an increase in the EAD fractional impedance bandwidth from 0.9% to 46.0%, a factor of over 50 times improvement.

Original languageEnglish (US)
Title of host publication2015 International Workshop on Antenna Technology, iWAT 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages89-91
Number of pages3
ISBN (Print)9781479977178
DOIs
StatePublished - Dec 23 2015
EventInternational Workshop on Antenna Technology, iWAT 2015 - Seoul, Korea, Republic of
Duration: Mar 4 2015Mar 6 2015

Other

OtherInternational Workshop on Antenna Technology, iWAT 2015
CountryKorea, Republic of
CitySeoul
Period3/4/153/6/15

Keywords

  • Electrically small antennas
  • metamaterials
  • negative impedance converters
  • non-Foster circuits

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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