A Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna

Nasimuddin, Nasimuddin; Anjani, Y. S.; Alphones, Arokiaswami

doi:10.1109/tap.2015.2438397

Cited by 95 publications

(56 citation statements)

References 30 publications

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“…As given in Table 2, a comparison is made between the proposed antenna and previous antennas in terms of antenna size, 3-dB AR beamwidth and average gain at 5 • elevation angle. The proposed antenna and the antennas in [1,4,12,13] have a 3-dB AR beamwidth of more than 120 • at both XZplane and Y Z-plane. The profiles of the antennas in [12,13] are lower than that of the proposed antenna, but the average gain of the proposed antenna at 5 • elevation angle is −0.5 dBic, which is larger than those of the antennas in [1,12,13].…”

Section: Experimental Results and Comparisonmentioning

confidence: 99%

“…Using two pairs of radiators in square contour, 3 dB AR beamwidths of 126 • [13] and 175 • [14] are obtained, respectively. However, gains in [9][10][11][12][13][14] at 5 • elevation angle are all less than −3 dBic. In order to improve the gain at low elevation angle, some techniques have been put forward in [1,[15][16][17].…”

Section: Introductionmentioning

confidence: 93%

“…However, these antennas are bulky because they use power divider [8] and metallic cavities [9,10]. Besides, microstrip antennas with a three-dimensional square ground [11] and four unequal circular patches integrated symmetrically onto corners [12] are proposed, whose 3-dB AR beamwidths are improved up to 113 • and 180 • , respectively. But height of antenna [11] is more than 0.45 wavelength.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Experimental Results and Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Wang¹,

Zhang²,

Fan³

et al. 2017

PIER C

View full text Add to dashboard Cite

show abstract

“…However, this approach enlarges the antenna dimension with a complexity structure and relative narrow HPBW. Several researches on low profile wide ARBW CP antennas were reported including an asymmetric microstrip antenna with integrated circular and stubpatches [3,4]. In [5], a planar CP antenna combining two pairs of linear dipoles in a square contour is proposed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Circularly Polarised Antenna With Wide Power and Axial-Ratio Beamwidth by Using Tilted Dipoles

Wang¹,

Chen²,

Wu³

et al. 2017

PIER Letters

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Abstract-A novel circularly polarised antenna with wide 3 dB axial-ratio beamwidth (ARBW) and half power beamwidth (HPBW) is proposed in this letter. By using two pairs of tilted dipoles, the ARBW of the antenna is significantly enhanced to about 160 • and 162 • in the XZ-and Y Z-planes, respectively. Meanwhile, its HPBW is also broadened to above 116 • in the dual planes. A prototype is manufactured and measured to validate the method. The measured results show that |S 11 | < −10 dB reaches about 38.8% (1.37 GHz-2.03 GHz), and the AR at broadside bandwidth is 14% (1.51 GHz-1.74 GHz). The gain of the antenna also keeps above 4.19 dBic. Meanwhile, acceptable agreements can be obtained between the simulated and measured results. As such, the proposed CP antenna with wide beamwidth can be used in various navigation systems.

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“…In recent years, several techniques have been proposed to widen the 3-dB AR beamwidth in [3][4][5][6][7][8][9][10][11], such as using the ground plane with small size, dielectric materials with high permittivity and metallic cavity. In [9], based on a patch antenna, a conducting wall and a ground with pyramidal structure were employed to obtain a 130 • AR beamwidth at central frequency.…”

Section: Introductionmentioning

confidence: 99%

Wide-Beamwidth Circularly Polarized Antenna and Its Application in a Sequential-Rotation Array With Enhanced Bandwidth

Jiang¹,

Zhang²,

Zhang³

et al. 2016

PIER C

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Abstract-A wide-beamwidth circularly polarized (CP) asymmetric microstrip antenna is proposed by etching four novel unequal fan-shaped notches at the vertexes of the square radiator. A bandwidth of 1.5% and beamwidth of 156 • are well achieved for an axial-ratio ≤ 3 dB (3-dB AR) at the central frequency of 1.575 GHz. To widen the bandwidth, the asymmetric microstrip antenna is further expanded with the construction of a 2 × 2 antenna array using sequentially rotated feeding technique. Moreover, by properly optimizing the distance between each two neighboring elements and the radii of the fan-shaped notches, the 3-dB AR bandwidth of the sequential-rotation array (SRA) is approximately extended to 7.8% with a wide-beamwidth at the central frequency of 1.6 GHz. In addition, the gain variation within the bandwidth is less than 1 dB. Finally, a laboratory model of the SRA has been fabricated, and acceptable agreement of the simulated and measured results makes it a good candidate for applications where wide-bandwidth, wide-beamwidth and small gain variation are needed.

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A Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna

Cited by 95 publications

References 30 publications

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

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

A Novel Circularly Polarised Antenna With Wide Power and Axial-Ratio Beamwidth by Using Tilted Dipoles

Wide-Beamwidth Circularly Polarized Antenna and Its Application in a Sequential-Rotation Array With Enhanced Bandwidth

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