A Metasurface-Based Wide-Bandwidth and High-Gain Circularly Polarized Patch Antenna

Kedze, Kam Eucharist; Wang, Heesu

doi:10.1109/tap.2021.3098574

Cited by 41 publications

(23 citation statements)

References 39 publications

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“…Other implementations rely on Metasurfaces (MTSs) placed on the top of a LP radiator with the aim of converting the radiated field into a CP one [16]- [18]. A slightly different approach is represented by a single antenna or an array that is already able to radiate a CP field whose performance in terms of bandwidth or gain are enhanced by a metasurface [19]- [23].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna

Genovesi

Dicandia

2022

IEEE Access

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A metasurface (MS) based on loop elements operating in the near field of a linearly-polarized microstrip antenna is employed to realize a circularly polarized radiated field. The properties of the loop unit cell are highlighted with the help of the Characteristic Mode Analysis that is employed for investigating the achievable linear to circular polarization conversion bandwidth and providing the guidelines for the design of the final antenna. A finite structure comprising 4×4 unit cells is tailored for achieving a circularly polarized far field within the whole X-band adopted for satellite communications (7.25 GHz-7.75 GHz, 7.9 GHz-8.4 GHz). A simple but effective single-port excitation scheme is adopted, and the overall performance are assessed by measurements on the fabricated prototype. The good agreement between simulated and measured results confirms the reliability of the proposed approach as well as the meaningful insight provided by Characteristic Modes Theory.

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Section: Introductionmentioning

confidence: 99%

Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna

Genovesi

Dicandia

2022

IEEE Access

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“…An H-shaped patch array (4 × 4) metasurface demonstrates a CP bandwidth of 14.3% and a pro le of 0.071λ 0 [11]. In order to enhance the radiation gain, an air layer [14] or a foam substrate [15] was placed between the metasurface and the feed structure. Nevertheless, this strategy leads to an increase in the pro le height and the structural complexity of the antenna.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Broadband Circularly Polarized Metasurface Antenna Aperture Coupled by Shorted Annular-Ring Slot

Liu

Yang

Chen

et al. 2022

International Journal of Antennas and Propagation

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A low-profile (LP) metasurface antenna is proposed for broadband circularly polarized (CP) operations. The metasurface radiator, formed by a 5 × 5 array of square patches, has a microstrip line fed at its bottom through a shorted annular-ring slot centered on the ground plane. First, the characteristic mode analysis (CMA) methodology is employed to examine the intrinsic modes of the metasurface. Subsequently, a pair of mutually orthogonal modes is selected and excited by the feeding structure with a 90° phase difference to produce CP radiation. For the purpose of verification, a prototype antenna is developed, and the obtained data reveal that the antenna exhibits an impedance bandwidth of 43.9% ranging from 4.8 to 7.5 GHz (S11<−10 dB). The 3-dB axial ratio bandwidth is 22.2% in the range of 5.6–7 GHz, among which a satisfactory left-handed CP radiation is achieved, and the maximum gain in the broadside direction reaches 9.3 dBic at 6.9 GHz.

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“…Some other structures, such as, phase-shifting surfaces [7][8][9][10], phase correcting surfaces [11] and phase gradient metasurfaces [12], have attracted more attention because they can make the lens design less bulky. In Ref.…”

Section: Introductionmentioning

confidence: 99%

A single‐layer circularly polarized planar lens antenna at millimetre‐wave

Sadeghi-Marasht

Rahimi

Sharawi

et al. 2022

IET Microwaves Antenna & Prop

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This paper proposes a novel single‐layer planar lens antenna with the capability of keeping circular polarization (CP) of the incoming CP wave and enhanced gain for millimetre‐wave applications. Because of the symmetric design of the lens unit cell, a 90‐degree phase difference between two modes of the incoming CP wave can be maintained with high amplitude. Furthermore, the phase variations created by the designed unit cells change the phase of the incoming wave and result in antenna gain enhancement. Two different feeding antennas, a CP patch antenna and a 2 × 2 CP antenna array, are used as the feeding section to evaluate the performance of the proposed lens. Maximum gains of 19.2 dBiC and 23.4 dBiC with −10 dB impedance bandwidths of 3.5% and 2.9% at Ka‐band are reported for the proposed lens fed by these two CP antennas, respectively, while keeping the axial ratio value below 3 dB. The substrate material of the proposed lens design is RO4003 C with the total dimensions of 9.79λ0 × 9.79λ0 × 0.047λ0 (where λ0 is the free space wavelength at 28 GHz). The measurements conducted on the fabricated prototypes agree very well with the simulation and analysis results.

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A Metasurface-Based Wide-Bandwidth and High-Gain Circularly Polarized Patch Antenna

Cited by 41 publications

References 39 publications

Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna

Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna

A Low-Profile Broadband Circularly Polarized Metasurface Antenna Aperture Coupled by Shorted Annular-Ring Slot

A single‐layer circularly polarized planar lens antenna at millimetre‐wave

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