Broad Bandwidth, Electrically Small, Non-Foster Element-Augmented Antenna Designs, Analyses, and Measurements

Ning ZHU  Richard W. ZIOLKOWSKI  

IEICE TRANSACTIONS on Communications   Vol.E96-B    No.10    pp.2399-2409
Publication Date: 2013/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.2399
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012)
Category: Antennas
active antennas,  broadband antennas,  electrically small antennas,  metamaterial-inspired antennas,  non-Foster elements,  

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Several broad bandwidth, electrically small, non-Foster element-augmented antennas have been designed, analyzed and measured. Both electric loop (protractor) and electric dipole (Egyptian axe) structures have been selected as the near-field resonant parasitic (NFRP) elements for these antenna designs. In order to increase their instantaneous 10dB bandwidth, negative impedance convertor (NIC)-based capacitor and inductor elements have been designed accordingly to be incorporated internally into those NFRP elements. Proper design and analysis procedures for these systems are introduced. The simulated performance characteristics of the resulting non-Foster element-augmented protractor and Egyptian axe dipole antennas are presented. Favorable comparisons with their experimentally measured values are demonstrated.