Compact Printed Quadrifilar Helical Antenna With Iso-Flux-Shaped Pattern and High Cross-Polarization Discrimination

Hebib, Sami; Fonseca, Nelson J. G.; Aubert, Hervé

doi:10.1109/lawp.2011.2159189

Cited by 32 publications

(18 citation statements)

References 14 publications

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“…This is in fact not a new finding and it has been reflected in several papers such as [6][7][8]. However, the ignorance of this issue in several other papers [9][10][11][12][13][14][15][16][17][18][19][20][21][22] is the motivation of this research to prevent from further errors. Above all, while looking for a wideband microstrip antenna in the recently published papers, I encountered to a significant solution, an octave-bandwidth antenna consisting of two inverted Uslots and two probes [9].…”

Section: Introductionmentioning

confidence: 85%

“…However, the issue is more important when the antennas are miniaturised, since the coupling between the ports is increased, such as for the QHAs with meandered or folded arms, the conical QHAs with folded arms, etc. [12][13][14][15][16][17][18][19][20]. In this paper, two structures are re-examined; multi-fed spiral antennas with folded arms [21,22] in section 3 and quadrifilar square helical antennas (QSHAs) with folded arms [4] in section 4.…”

Section: Introductionmentioning

confidence: 99%

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On the Precise Examination of Multi-Port Antennas; Corrections and Criticisms to Some Recently Reported Results

Fartookzadeh¹

2019

Preprint

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In this paper, precise examination of multi-port antennas with large mutual coupling between the ports is studied. For this purpose, some vital parameters such as active reflection coefficients and realised gain are emphasized. The main motivation of this research is the ignorance of this issue in several recently published papers. Hence, corrections and criticisms to some recently reported results are presented. At first, a microstrip patch consisting of two inverted U-slots is re-examined, which has been proposed in a recently published paper for wideband applications. However, the authors did not present satisfactory results to indicate the performance of the proposed structure. In reverse, some important parameters such as the antenna gain appear to be incorrectly reported. In this paper, the characteristics of the antenna are compared with a simple 50 Ω microstrip line excited by two probes, indicating no significant differences. In the remainder of this paper, some corrections are provided on two examples of wide-beam circularly polarised multi-fed antennas for satellite applications. The first example is the multi-fed spiral antennas with folded arms, which have been proposed as the widebeam antennas at 435 MHz. It is indicated that the antenna height should be increased for better performance. The second example is the quadrifilar square helical antennas with folded arms, which have been proposed as the widebeam antennas for 435 MHz with minor responses at 145 MHz. Some corrections are presented on the previously reported minor responses at 145 MHz.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

On the Precise Examination of Multi-Port Antennas; Corrections and Criticisms to Some Recently Reported Results

Fartookzadeh¹

2019

Preprint

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“…Based on the optimization algorithm and on the design methodology reported in [1] an air supporting wire CQHA was firstly studied. In order to facilitate the manufacturing this CQHA is derived from a first order modified Von Koch profile (beta=72°) combined with a sinusoidal profile (amplitude to period ratio k=0.4).…”

Section: B Cqhamentioning

confidence: 99%

Miniaturization of Quadrifilar Helix Antennas for space applications

Takacs

Idda

Aubert

et al. 2012

2012 15 International Symposium on Antenna Technology and Applied Electromagnetics

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This paper addresses the miniaturization of Quadrifilar Helix Antennas (QHA) for space applications. A new miniaturization technique based on an original combination of a modified fractal shape and a sinusoidal profile is proposed. Experimental and numerical (simulation) results show that the height of Compact QHA (CQHA) may be 70% shorter than the height of classical QHA without significant degradation of antenna performances

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“…Quadrifilar helix antenna (QHA) [2][3][4][5][6][7] is a typical solution to meet circular polarization and wide spatial coverage requirements. However, the gain requirement at low elevation angle is satisfied at the expense of high profile.…”

Section: Introductionmentioning

confidence: 99%

Compact Wide-Beam Circularly Polarized Antenna With Stepped Arc-Shaped Arms for CNSS Application

Wang¹,

Zhang²,

Fan³

et al. 2017

PIER C

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Abstract-A single-feed circularly polarized wide-beam antenna is proposed for Compass Navigation Satellite System (CNSS) application. The antenna consists of four stepped arc-shaped arms, which are applied to generate circularly polarized radiation. To broaden the beamwidth, each arm is split up into two horizontal arc-shaped parts and one vertical part. The proposed antenna is simulated, fabricated and tested. The measured results show that the 10-dB return loss band of the proposed antenna is from 2.37 GHz to 2.65 GHz and the 3-dB axial ratio band from 2.42 GHz to 2.55 GHz, covering the receiving band (2.49175 GHz ± 4.08 MHz) of CNSS. Its 3-dB AR beamwidth is 181 • at 2.491 GHz. For the horizontal radiation pattern of the proposed antenna at 5 • elevation angle, the RHCP gain is greater than −1.1 dBic, and the out-of-roundness is 1 dB. Additionally, the proposed antenna has a size of 0.37λ 0 × 0.37λ 0 × 0.11λ 0 with respect to 2.491 GHz.

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Compact Printed Quadrifilar Helical Antenna With Iso-Flux-Shaped Pattern and High Cross-Polarization Discrimination

Cited by 32 publications

References 14 publications

On the Precise Examination of Multi-Port Antennas; Corrections and Criticisms to Some Recently Reported Results

On the Precise Examination of Multi-Port Antennas; Corrections and Criticisms to Some Recently Reported Results

Miniaturization of Quadrifilar Helix Antennas for space applications

Compact Wide-Beam Circularly Polarized Antenna With Stepped Arc-Shaped Arms for CNSS Application

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