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Open AccessArticle
A Novel Feeding Technique for a Quadrifilar Helix Antenna
by
Alessandro Di-Carlofelice
Alessandro Di-Carlofelice
Prof. Alessandro Di Carlofelice graduated in Electronic Engineering at the University of Italy, in [...]
Prof. Alessandro Di Carlofelice graduated in Electronic Engineering at the University of L’Aquila, L’Aquila, Italy, in 2006 and earned a Ph.D in Microwave radiometry for remote sensing and bio-medical applications in 2011. In July 2006, he participated in the ESMO (European Student Moon Orbiter) program, supported by ESA, to design a microwave radiometer payload. In November 2006, he joined the EXOMARS program with Telespazio to perform detailed analyses and trade-offs of communication scenario options for the ROCC (Rover Operations Control Center) in support of rover mission operations. He tested hybrid subsystems (a Ku-band transmitter) at Thales Alenia Space (Sept. 2007 – Dec. 2007). In February 2011, he joined the Department of Electrical Engineering and Information Technology at the University of L’Aquila as a Postdoctoral Researcher. His research focuses on space systems for telecommunications and remote sensing. He is a member of SIEM (Italian Society of Electromagnetics).
,
Emidio Di-Giampaolo
Emidio Di-Giampaolo
Piero Tognolatti
Piero Tognolatti
Department of Industrial and Information Engineering and Economics, University of L’Aquila, I-67100 L’Aquila, Italy
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Electronics 2026, 15(1), 28; https://doi.org/10.3390/electronics15010028 (registering DOI)
Submission received: 7 November 2025
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Revised: 2 December 2025
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Accepted: 16 December 2025
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Published: 21 December 2025
Abstract
This paper proposes a novel method for feeding a half-turn quadrifilar helix antenna (QHA) operating in backfire mode. A self-phasing and self-supporting antenna is obtained using a specific method demonstrated numerically. Four straight parallel wires, by which a couple of short-circuited stubs are realized and connected in series with helix loops, constitute both the mast of the QHA and the feeding network. A prototype operating at 1 GHz is designed, realized, and measured. The results show a good axial ratio (measured cross-polar gain is about 25 dB below the co-polar one at the boresight) and good impedance matching over an adequately large frequency band.
Share and Cite
MDPI and ACS Style
Di-Carlofelice, A.; Di-Giampaolo, E.; Tognolatti, P.
A Novel Feeding Technique for a Quadrifilar Helix Antenna. Electronics 2026, 15, 28.
https://doi.org/10.3390/electronics15010028
AMA Style
Di-Carlofelice A, Di-Giampaolo E, Tognolatti P.
A Novel Feeding Technique for a Quadrifilar Helix Antenna. Electronics. 2026; 15(1):28.
https://doi.org/10.3390/electronics15010028
Chicago/Turabian Style
Di-Carlofelice, Alessandro, Emidio Di-Giampaolo, and Piero Tognolatti.
2026. "A Novel Feeding Technique for a Quadrifilar Helix Antenna" Electronics 15, no. 1: 28.
https://doi.org/10.3390/electronics15010028
APA Style
Di-Carlofelice, A., Di-Giampaolo, E., & Tognolatti, P.
(2026). A Novel Feeding Technique for a Quadrifilar Helix Antenna. Electronics, 15(1), 28.
https://doi.org/10.3390/electronics15010028
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