Meandered Variable Pitch angle Printed Quadrifilar Helix Antenna

Bhandari, B. N.; Gao, Steven; Brown, Tim

doi:10.1109/lapc.2009.5352390

Cited by 14 publications

(10 citation statements)

References 6 publications

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“…Other key parameters impacting QHA design and performances are the diameter d g of the ground plane and the wire radius for wire-supported QHA (or the strip width for printed QHA). Wire-supported QHA designs were reported in [2][3][4][5][6][7][8][9] while printed QHA were studied in [10][11][12][13][14][15].…”

Section: Qha Designmentioning

confidence: 99%

“…In the past years, the shapes of constitutive wires in CQHAs were described by sinusoidal [6,12,15], periodic triangular [20], periodic trapezoidal [20], rectangular [12,21], meandered [13,14], prefractal [22], non-linear functions [23] and more recently, by the combination of fractal and sine functions [24] (a review of the patents on CQHAs can be found in [25]). The axial height of the QHA can be also reduced by modifying the geometry/the shape at the center of the helical section [7,8].…”

Section: Quadrifilar Helix Antenna With Arbitrary Shapementioning

confidence: 99%

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Miniaturization of Compact Quadrifilar Helix Antennas for Telemetry, Tracking and Command Applications

Takacs¹,

Aubert²,

Belot³

et al. 2015

PIER C

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Abstract-This paper addresses the miniaturization of Quadrifilar Helix Antennas (QHAs) for space applications (VHF Telemetry, Tracking and Command). Several shape miniaturization techniques were presented, and the impact of height reduction is quantified in terms of radiation pattern, gain and phase center. Simulated and experimental results demonstrate that Compact Quadrifilar Helix Antennas (CQHAs) with a height reduced up to 70% reported to the reference QHA can be designed. By using an appropriate optimization method, the impact of the miniaturization on CQHA performances in terms of radiation pattern and polarization purity can be minimized. Moreover, the impact on the gain is quantified, and design rules are reported. Finally a closed-form expression for estimating the gain of CQHAs from the height reduction factor is found.

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Section: Qha Designmentioning

confidence: 99%

Section: Quadrifilar Helix Antenna With Arbitrary Shapementioning

confidence: 99%

Miniaturization of Compact Quadrifilar Helix Antennas for Telemetry, Tracking and Command Applications

Takacs¹,

Aubert²,

Belot³

et al. 2015

PIER C

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“…To overcome the problems of multipath fading and polarization mismatch between ground antenna receivers and satellites, circularly polarized (CP) antennas exhibiting an excellent axial ratio over the operating band and over a wide beamwidth are then required [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, conventional power dividers have large dimensions, and commercial 90 • hybrids couplers are not practical for BPQHAs [1,7]. Therefore, it is essential to design a simple and compact feeding network with a wide operating bandwidth for the BPQHA.…”

Section: Introductionmentioning

confidence: 99%

A Broadband Printed Quadrifilar Helical Antenna With a Novel Compact Broadband Feeding Network

Yang¹,

Yan²,

Xu³

et al. 2014

PIER C

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Abstract-A broadband printed quadrifilar helical antenna (BPQHA) integrated with a broadband feeding network for satellite communications is proposed. Using a multiple arm technique, satisfactory antenna characteristics over a wide bandwidth are realized. To feed the antenna, a novel compact broadband feeding network composed of a frequency independent 180 • out-of-phase power divider, two Wilkinson power dividers and two broadband 90 • phase shifters is designed. The measured boresight gain remains positive with a reflection coefficient lower than −11 dB over a bandwidth of approximately 26%. The axial ratio is below 1.7 dB and the half-power beamwidth is more than 120 • over the same bandwidth. Details of the proposed antenna design are provided and discussed, as well as the experimental results.

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“…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.

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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

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Meandered Variable Pitch angle Printed Quadrifilar Helix Antenna

Cited by 14 publications

References 6 publications

Miniaturization of Compact Quadrifilar Helix Antennas for Telemetry, Tracking and Command Applications

Miniaturization of Compact Quadrifilar Helix Antennas for Telemetry, Tracking and Command Applications

A Broadband Printed Quadrifilar Helical Antenna With a Novel Compact Broadband Feeding Network

Size Reduced Multi-Band Printed Quadrifilar Helical Antenna

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