Assembled Dual-Band Broadband Quadrifilar Helix Antennas With Compact Power Divider Networks for CNSS Application

Chu, Qing‐Xin; Lin, Wei; Lin, Wei; Pan, Ze-Kun

doi:10.1109/tap.2012.2223443

Cited by 66 publications

(19 citation statements)

References 17 publications

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“…A compact feed network proposed in our previous work [20] is used to feed the proposed antenna. Two Wilkinson power dividers are used as the feed network, providing sequential PD of 90 • and same amplitude.…”

Section: Realization Of the Feed Networkmentioning

confidence: 99%

Wide Beamwidth Quadifilar Helix Antenna With Cross Dipoles

Lin¹,

Chu²

2013

PIER C

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A simple and novel method for increasing the gain at low elevation angle and widening the beamwidth of quadrifilar helix antenna (QHA) is presented. By adding cross dipoles as a reflector, the right hand circular polarization (RHCP) gain at 5 • elevation angle (θ = 85 •) increases by about 1.4 dB. Parametric studies are performed to explore the performance improvements. An antenna for CNSS (Compass Navigation Satellite System, 2.492 GHz) application is realized based on the studies. The RHCP gain at 5 • elevation angle is about 0.6 dB, and 3 dB beamwidth is greater than 220 •. 10 dB impedance bandwidth is more than 24%, and 3 dB axial ratio bandwidth is more than 32%. Measured results are presented to validate the proposed method.

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Section: Realization Of the Feed Networkmentioning

confidence: 99%

Wide Beamwidth Quadifilar Helix Antenna With Cross Dipoles

Lin¹,

Chu²

2013

PIER C

Self Cite

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“…Quadrifilar helix antenna (QHA) has a wide range of applications and is deployed on various space and terrestrial communication platforms . It is used for global positioning system (GPS), radio frequency identification (RFID), and low earth orbit (LEO) satellites .…”

Section: Introductionmentioning

confidence: 99%

Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights

Ahmad

Khan

Amin³

et al. 2019

Int J Communication

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Quadrifilar helix antenna (QHA) has its applications in satellite communications. This paper presents the performance optimisation of input and radiation characteristics of QHA in the presence of infinite and finite metallic ground planes. For the infinite ground plane, it has been observed that input parameters such as impedance and voltage standing wave ratio (VSWR) are stable, and the antenna has broader half power beamwidth (HPBW). Smaller metallic platforms that act as finite ground planes produce better 3-dB axial ratio beamwidth and boresight axial ratio. Deployment of QHA on smaller metallic platforms such as nanosatellites and CubeSats enhances the circularly polarised beamwidth of the antenna with improved boresight axial ratio. However, on large low earth orbit (LEO) satellites, stable input characteristics and broader HPBW have been achieved at the cost of narrow circularly polarised beamwidth and degraded boresight axial ratio.KEYWORDS helix antenna, satellite antennas, satellite communication, RF measurements, wire antennas, wideband antennas 1 | INTRODUCTION Quadrifilar helix antenna (QHA) has a wide range of applications and is deployed on various space and terrestrial communication platforms. 1-5 It is used for global positioning system (GPS), 5 radio frequency identification (RFID), 6 and low earth orbit (LEO) satellites. 7 In authors' opinion, further study is required on the QHA deployment over terrestrial and satellite platforms.In literature, the effect of ground plane on the QHA radiation characteristics is explained based on two theories: image theory and uniform theory of diffractions. Image theory explains the performance of QHA above large infinite ground planes that is helpful in examining QHA for large platforms. 8 If the ground plane is a perfect electric conductor, it will reflect radiations caused by any antenna installed over it. The image theory assumes that this reflected signal is originated by another antenna placed at the mirror image of the real antenna. This assumption helps to analyse ground reflections as the superposition of two radiation sources. Uniform theory of diffraction (UTD) is applicable to the finite ground plane models to describe the diverging behaviour of QHA from an expected response. 9,10 UTD is derived from the geometrical theory of diffraction (GTD) that has a significant impact on the high frequency computational This work was supported by COMSATS University Islamabad, Lahore Campus, Lahore Pakistan.

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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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Assembled Dual-Band Broadband Quadrifilar Helix Antennas With Compact Power Divider Networks for CNSS Application

Cited by 66 publications

References 17 publications

Wide Beamwidth Quadifilar Helix Antenna With Cross Dipoles

Wide Beamwidth Quadifilar Helix Antenna With Cross Dipoles

Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights

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

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