Pair of diagonal slots loaded low‐profile circularly polarised patch antenna with wide 3 dB axial ratio beamwidth

Ray, Mrityunjoy Kumar; Mandal, Kaushik

doi:10.1049/iet-map.2019.0392

Cited by 5 publications

(4 citation statements)

References 17 publications

(25 reference statements)

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“…Initially, a conventional approach involving a crossed-shaped slot [28] at the center of the patch is conceived to design a planar circular-shaped CP antenna, as shown in Fig. 1(a).…”

Section: Design Strategies and Working Principle Of The Proposed Cp A...mentioning

confidence: 99%

Axial ratio beamwidth enhancement of a low-profile circularly polarized antenna using defected ground structures

Ray

Mandal

Moloudian

et al. 2023

Int. J. Microw. Wireless Technol.

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This article explores the possibilities of incorporating a defected ground structure (DGS) for widening the 3 dB axial ratio beamwidth (ARBW) of a simple low-profile planar circularly polarized (CP) antenna. Two pairs of DGSs are etched symmetrically along the diagonals of the ground plane to overcome the limited 3 dB ARBW performance of a crossed-slotted circular-shaped planar CP antenna. Here, one pair of DGSs is orthogonal to another pair of DGSs. The distance between the pairs of DGSs plays a key role in enhancing the 3 dB ARBW by 40.62%. A gap of 0.18λ0 is considered between the DGSs to maintain the symmetrical electric field distribution in the substrate. It also helps to reduce orthogonal current components and provides uniformly distributed patch surface currents. These phenomena collectively help the proposed CP antenna to exhibit right-handed circular polarization radiation with the 3 dB ARBW of 186° and 188° in the E-plane and H-plane, respectively. The measured results yield impedance bandwidth (S11 ≤ −10 dB) of 2.6% (2.283–2.342 GHz), CP bandwidth of 0.9% (2.294–2.315 GHz), gain higher than 4.8 dBic, and total antenna efficiency more than 64% across the entire CP band.

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“…Initially, a conventional approach involving a crossed-shaped slot [28] at the center of the patch is conceived to design a planar circular-shaped CP antenna, as shown in Fig. 1(a).…”

Section: Design Strategies and Working Principle Of The Proposed Cp A...mentioning

confidence: 99%

Axial ratio beamwidth enhancement of a low-profile circularly polarized antenna using defected ground structures

Ray

Mandal

Moloudian

et al. 2023

Int. J. Microw. Wireless Technol.

Self Cite

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show abstract

“…Due to this the reported design has larger patch area and lower gain as well. Using diagonal slots on thinner substrate circular or rectangular patches, CP design offering higher AR beam width is reported [38][39][40]. However, those designs offer single band CP response with lower AR BW and thus cannot find applications in frequency and polarization agile systems.…”

Section: Parametric Design Formulation For Modified ψ-Shape Msamentioning

confidence: 99%

Dual Band Circularly Polarized Modified Ψ-Shape Microstrip Antenna

Deshmukh¹,

Odhekar²

2021

PIER C

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Single patch designs of a microstrip antenna with a U-slot or a pair of rectangular slots (E-shape) provide a single band circularly polarized response, and hence they are not useful in frequency and polarization agile applications. In this paper, a modified design of a Ψ-shape microstrip antenna is proposed for dual band and dual sense circularly polarized response. Use of unequal length rectangular slots in the modified patch optimizes the inter-spacing between the modified TM 21 and TM 22 resonant modes, surface current distributions and impedance levels at them to yield dual band circularly polarized response. An impedance bandwidth of 1992 MHz (37.05%) is obtained which completely covers the axial ratio bandwidth of 11.84 and 5.67%, in the two bands with a frequency ratio of 1.3 in between them, thereby satisfying the requirements of frequency agile systems. Over the impedance and axial ratio bandwidth, the antenna exhibits nearly broadside radiation pattern with a gain of around 7 dBi. A design methodology based on the simple parametric formulation is presented, which helps in realizing a similar antenna in the specific frequency band. The proposed antenna can find applications in frequency and polarization agile systems where the signal loss due to the interference and jamming can be reduced.

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“…The generation of CP radiation depends on the insertion of appropriate fractional slotted area in the antenna. It is observed that an antenna with a <1% (≈ 0.7%) fractional slotted area [17] radiates linearly polarized waves. However, the 3-dB ARBW of CP radiation is tuned with the placement of slotted structure in the antenna.…”

Section: Antenna Configuration and Design Analysismentioning

confidence: 99%

“…Strips based scheme on slotted patch is examined to study a CP antenna for beamwidth enhancement [16]. A critical study on the slotted fractional part concerning the patch is investigated for beamwidth clarification of CP antenna [17]. In [18], the beamwidth of CP antenna is presented as function of mutual coupled field between slotted structures.…”

Section: Introductionmentioning

confidence: 99%