"Folded" quadrifilar helix antenna

Petros, A.; Licul, S.

doi:10.1109/aps.2001.959527

Cited by 12 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Use of folded arms for a QHA was previously reported to improve impedance match and bandwidth and/or to reduce size [1] [5]. Further improvements to the folded QHA were developed under this task to extend the frequency coverage to include all GNSS and Iridium, and also to colocate it with a UHF monopole.…”

Section: Report Documentation Pagementioning

confidence: 99%

See 1 more Smart Citation

Novel Quadrifilar Helix Antenna Combining GNSS, Iridium, and a UHF Communications Monopole

Elliot¹,

Rosario²,

Davis³

2012

View full text Add to dashboard Cite

A GPS/GNSS/Iridium antenna co-located with a UHF communications monopole on a handset was developed to provide integrated communications and navigation capability. The GPS/GNSS/Iridium antenna is a folded Quadrifilar Helix Antenna (QHA) with novel features to improve frequency coverage compared to existing QHA designs. The GNSS frequencies covered include modernized GPS (L1, L2, L5), GLONASS, Galileo, and Beidou (Compass), spanning from 1164 to 1300 MHz and 1559 to 1611 MHz. The Iridium communications band (1611-1626 MHz) is also covered. This antenna can be co-located concentrically (co-axially) around a 225-400 MHz UHF monopole. Two QHA models were built and tested co-located with the UHF monopole on a handset box. I.

show abstract

Section: Report Documentation Pagementioning

confidence: 99%

“…The QHA in [3] is 3.07" long and 1.42" diameter and only covers L1/L2, not L5 nor other GNSS frequencies nor Iridium. The QHA designs reported in [4] and [5] cover only one narrow frequency band. A prior L1/L2 dual-band trap-loaded QHA [7][8] is about 5" long and covers only L1 and L2.…”

Section: Report Documentation Pagementioning

confidence: 99%

Novel Quadrifilar Helix Antenna Combining GNSS, Iridium, and a UHF Communications Monopole

Elliot¹,

Rosario²,

Davis³

2012

View full text Add to dashboard Cite

show abstract

“…Examples for SDARS -antennas were already proposed on different occasions last year, e.g. in [1] and [2].…”

Section: Sdars Antenna Investigations On Ground Planesmentioning

confidence: 99%

SDARS - Antennas: Environmental Influences, Measurement, Vehicle Application Investigations and Field Experiences

Daginnus¹,

Kronberger²,

Stephan³

et al. 2002

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…Several methods to reduce the axial length have already been developed and presented, using an integrated feeding network [5], introducing a dielectric rod inside the helix [6]- [8], employing variable pitch angles on the wires [9], winding the arms Manuscript according to a sinusoidal profile [10], [11], meandering the radiating elements [12]- [15], through the folding line technique or using coupled segment [16], [17], and via insertion of gaps [18]. The main limitation of these antennas is the narrow impedance bandwidth and therefore insufficiency to meet requirements of new antenna communication applications.…”

Section: Introductionmentioning

confidence: 99%

Size Reduced Multi-Band Printed Quadrifilar Helical Antenna

Rabemanantsoa

Sharaiha²

2011

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Josh Rabemanantsoa was born in Fianarantsoa, Madagascar. He received the Master degree in telecommunications from the University of Rennes 1, France, in 2005, where he is currently working toward the Ph.D. degree. His research interests include antennas for mobile communication systems Ala Sharaiha (SM'09) received the Ph.D. and Habilitation à Diriger la Recherche (HDR) degrees in telecommunication from the University of Rennes 1, France, in 1990 and 2001, respectively.Currently, he is a Professor at the University of Rennes 1, Rennes, and a Researcher in the Antennas and High Frequency Group, Institute of Telecommunication of Rennes, where he is responsible of a research theme concerning the new concepts and architecture of antennas design. Main research activities include broadband and UWB antennas, miniaturization, printed spiral and helical antennas, antennas for mobile communications, etc. He conducted and involved in more than 15 development projects for private companies and participates in the European Network of Excellence ACE (Antenna Center of Excellence) in the small antenna WP. He is the author and coauthor of 35 international papers, 105 conference presentations and holds ten European patents.Prof. Sharaiha is a reviewer for the IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, the IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, the IET Letters and the IET Microwave Antennas Propagation. He was the conference

show abstract

"Folded" quadrifilar helix antenna

Cited by 12 publications

References 2 publications

Novel Quadrifilar Helix Antenna Combining GNSS, Iridium, and a UHF Communications Monopole

Novel Quadrifilar Helix Antenna Combining GNSS, Iridium, and a UHF Communications Monopole

SDARS - Antennas: Environmental Influences, Measurement, Vehicle Application Investigations and Field Experiences

Size Reduced Multi-Band Printed Quadrifilar Helical Antenna

Contact Info

Product

Resources

About