Wideband Unidirectional Circularly Polarized Antenna With L-Shaped Radiator Structure

Bisharat, Dia’aaldin J.; Liao, Shaowei; Xue, Quan

doi:10.1109/lawp.2016.2552228

Cited by 44 publications

(21 citation statements)

References 11 publications

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“…Moreover, the hexagonal stub establishes a 90 • phase difference between E xoy and E yoz components needed for achieving circular polarization characteristics. It is well known that E-field components of the same magnitudes and a quadrature phase variance gives rise to CP radiation [36,37]. In the proposed antenna element, the hexagonal stub introduces a 90 • phase difference amongst the two (horizontal and vertical) electric field components.…”

Section: (2)mentioning

confidence: 99%

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

Kumar

Urooj

Malibari

2020

Sensors

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This article presents a compact, planar, quad-port ultra-wideband (UWB) multiple-input–multiple-output (MIMO) antenna with wide axial ratio bandwidth (ARBW). The proposed MIMO design consists of four identical square-shaped antenna elements, where each element is made up of a circular slotted ground plane and feed by a 50 Ω microstrip line. The circular polarization is achieved using a protruding hexagonal stub from the ground plane. The four elements of the MIMO antenna are placed orthogonally to each other to obtain high inter-element isolation. FR-4 dielectric substrate of size 45 × 45 × 1.6 mm3 is used for the antenna prototype, and a good agreement is noticed among the simulated and experimental results. The proposed MIMO antenna shows 3-dB ARBW of 52% (3.8–6.5 GHz) and impedance bandwidth (S11 ≤ −10 dB) of 144% (2.2–13.5 GHz).

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Section: (2)mentioning

confidence: 99%

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

Kumar

Urooj

Malibari

2020

Sensors

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“…. Other approaches employed a printed crossed dipole with parasitic loops, L‐shaped radiator, or squared rings to achieve wide AR BW of around 50%.…”

Section: Introductionmentioning

confidence: 99%

Compact broadband circularly polarized slot-patch antenna array

Tran

Nguyen

2018

Int J RF Microw Comput Aided Eng

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A simple design of circularly polarized slot-patch antenna array with broadband operation and compact size is presented in this article. The antenna element consists of a circular slot and a semicircular patch, which are etched on both sides of a substrate. For the gain and axial ratio (AR) bandwidth enhancement, its array antennas are implemented in a 2 × 2 arrangement and fed by a sequential-phase feeding network. The final 2 × 2 antenna array prototype with compact lateral dimension of 0.8λ L × 0.8λ L (λ L is the lowest frequency within AR bandwidth) yielded a measured impedance bandwidth of 103.83% (2.76-8.72 GHz) and a measured AR bandwidth of 94.62% (2.45-6.85 GHz). The peak gain values within the AR bandwidth are from 2.85 to 8.71 dBi. A good agreement between the simulated and measured results is achieved. This antenna array is suitable for multiservice wireless systems covering WiMAX, WLAN and C-band applications such as satellite communications. K E Y W O R D Sbroadband antenna, circular polarization, sequential-phase feeding network, slot antenna FIGURE 5 Simulated peak gains for single element and its 2 × 2 antenna array J J J J J J J J 0°90°F IGURE 6 Simulated current distributions on the array antenna for different phases at 5 GHz LE ET AL.

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“…For getting 3 dB ARBW of 3.7 GHz (3.75–8.45 GHz) L‐shaped microstrip perturbations with two metallic squares on the bottom of the superstrate were used in Ref . A square slot along with a tapered slot connecting ground and patch was used in Ref for achieving 3.7 GHz (2.25–5.95 GHz) wide 3 dB ARBW while in Ref , L‐shaped strips were used for achieving 3 dB ARBW of 3.9 GHz (5.2–9.1 GHz). An open‐loop patch and ground plane were used for achieving 4.14 GHz (4.28–8.42 GHz) wide 3 dB ARBW in Ref .…”

Section: Introductionmentioning

confidence: 99%

“…Circularly polarized microstrip antennas (CPMAs) with wide 3 dB axial ratio bandwidth (ARBW) are in demand these days, as they can be effectively deployed in communication systems due to their immunity toward polarization mismatch and multipath distortion effect. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Besides having a wide 3 dB ARBW sometimes, it is desirable to have an antenna with multiple circularly polarized (CP) bands for interference reduction between various frequency bands. Keeping this in mind, a variety of antenna designs having multiple CP bands were proposed in the available literature.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, a significant amount of work has been done in the direction of getting a CP band 1,2 and increasing the 3 dB ARBW of CPMAs. [3][4][5][6][7][8][9][10][11][12][13][14] In Ref 1, an asymmetric Ushaped slot was used for getting a CP band at 2.4 GHz, while in Ref 2, circular polarization at 8.6 GHz has been achieved by placing a chiral-shaped metamaterial in the presence of linear patch antenna. A meandering probe and stacked patch were used for exciting CP waves in Ref 3 for getting 3 dB ARBW of 930 MHz (5.05-5.98 GHz).…”

Section: Introductionmentioning

confidence: 99%

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Compact microstrip antennas with very wide ARBW and triple circularly polarized bands

Saxena

Kanaujia

Dwari

et al. 2017

Int J RF Microw Comput Aided Eng

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This article presents two compact circularly polarized microstrip antennas with a very wide 3 dB axial ratio bandwidth and triple circularly polarized bands. A hexagonal stub (circular polarization element) along with tuning element in the ground plane is used for achieving wide 3 dB ARBW in antenna-1, while a novel approach of using a parasitic strip around the circular polarization element is used in antenna-2 for introducing band elimination notches in the circularly polarized band of antenna-1. The antenna-1 has a 210 dB impedance bandwidth of 12.34% (3.8-4.3 GHz), 84.02% (4.9-12 GHz), and 3 dB ARBW of 79.94% (4.9-10.9 GHz). The antenna-2 displays circularly polarized band elimination notch characteristics with 210 dB impedance bandwidth of 24

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Wideband Unidirectional Circularly Polarized Antenna With L-Shaped Radiator Structure

Cited by 44 publications

References 11 publications

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

Compact broadband circularly polarized slot-patch antenna array

Compact microstrip antennas with very wide ARBW and triple circularly polarized bands

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