A Dual Circularly-Polarized Multilayer Reflective Surface Based on Loaded Ring Slots

Martinez-Lopez, Lourdes; Martinez-Lopez, Rosalba; Rodriguez-Cuevas, Jorge; Martynyuk, Alexander E.; Martinez-Lopez, Jose I.

doi:10.1109/access.2021.3049252

Cited by 8 publications

(4 citation statements)

References 25 publications

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“…To date, several systems based on metasurfaces have been proposed to control the polarisation of an EM wave both in terms of Linear-to-Linear (LP-to-LP) and Linear-to-Circular (LP-to-CP) conversion [11]. With this regard, polarization control can be achieved via resonating [12], anisotropic [13], chiral [14] and artificial magnetic conductor [15] elements, both in transmission and reflection modes [16]. Notably, LP-to-LP [17] and LP-to-CP [18] ultra-wideband conversions have been demonstrated relying on anisotropic metasurfaces.…”

Section: Introductionmentioning

confidence: 99%

Plasma-Based Reflective Surface for Polarization Conversion

Magarotto

Schenato

Carlo

et al. 2023

IEEE Trans. Antennas Propagat.

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This study analyses, for the first time, the use of reflective surfaces based on magnetized plasmas for polarisation conversion. The feasibility of this concept has been assessed via a theoretical model. Moreover, the numerical design of a plasma-based reflective surface is presented. The latter enables linear-to-linear and linear-to-circular polarisation conversion over a broad frequency range, from 7.5 GHz to 13 GHz. To this end, the applied magnetic field intensity has to be tunable over 55-140 mT, and its direction steerable towards three mutual orthogonal axes. At the same time, the plasma density has to be controlled up to 2 × 10 18 m −3 . These requirements are consistent with the plasma technology at the state-of-the-art.

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Section: Introductionmentioning

confidence: 99%

Plasma-Based Reflective Surface for Polarization Conversion

Magarotto

Schenato

Carlo

et al. 2023

IEEE Trans. Antennas Propagat.

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“…Compared to dual-linearly polarized (dual-LP) RA, studies of dual-CP RA are still relatively insufficient despite its significant value in multiple fields. Existing RA designs that achieves dual-CP radiations in the same frequency band are mainly two types, [14][15][16][17][18][19][20][21][22] and the major difference is whether the LHCP and RHCP beams are independent with each other. For designs with coupled left-/right-handed circularly polarized (LHCP/RHCP) beams, [15][16][17] the coherence of the beams surely simplifies the design complexity of the unit cell, but meanwhile limits the application flexibility of the RA.…”

Section: Introductionmentioning

confidence: 99%

“…For designs with coupled left-/right-handed circularly polarized (LHCP/RHCP) beams, [15][16][17] the coherence of the beams surely simplifies the design complexity of the unit cell, but meanwhile limits the application flexibility of the RA. For designs with decoupled LHCP/RHCP beams, 14,[18][19][20][21][22] the unit cell can achieve independent phase modulation for LHCP and RHCP incident waves based on either the multifunctional-layer 14,22 or the single-functionallayer [18][19][20][21] concept. By separating the modulation of the fundamental phase and the geometric phase of the unit cell, extra degrees of design freedom are introduced, and thereby independent beam control of different polarizations can be obtained.…”

Section: Introductionmentioning

confidence: 99%

A wideband low‐profile dual‐circularly polarized reflectarray with decoupled LHCP/RHCP beams

Fan

Lin

Yang

et al. 2023

Micro & Optical Tech Letters

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This letter presents the design principle and experimental verification of a Ku‐band wideband low‐profile dual‐circularly polarized (dual‐CP) reflectarray (RA) with independent control of left‐/right‐handed circularly polarized (LHCP/RHCP) beams. Both the dynamic phase (DP) and Berry phase (BP) compensating methods are employed in the design of the unit cell, achieving independent LHCP/RHCP phase modulation based on the single‐functional‐layer concept. A single‐layer unit cell is designed, offering a ‐bit dual‐CP phase shift which facilitates the independent control of LHCP/RHCP beams. A prototype with asymmetrical dual‐CP beams is fabricated and tested. For LHCP and RHCP excitation, beam directions of () and () are realized, respectively, with sidelobe levels and cross‐polarizations both under −15 dB. The prototype exhibits a wide axial ratio (AR) bandwidth of over 36% with AR dB. The overlapped 1‐dB gain and AR dB bandwidth is 19.5% under LHCP input and 12.2% under RHCP input, with maximum aperture efficiency of 41.3% and 34.6%, respectively. The proposed dual‐CP RA exhibits broad band, pure chirality, high gain, low profile and independent polarization control, with single‐layer construction which is of low cost and easy processing.

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“…The use of septum polarizers in millimeter systems was proposed in Reference 73. The research 74 presents a design of a multilayer circular polarizer with independent phase‐shift properties. A design of a microwave polarizer in a square waveguide with three adjustable posts was proposed in Reference 75.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling and optimization of new Ku‐band tunable square waveguide iris‐post polarizer

Piltyay

Bulashenko

Sushko

et al. 2021

Int J Numerical Modelling

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A novel design of the polarizer based on a square waveguide with four posts and four irises for Ku‐band 10.7–12.8 GHz is proposed. The main advantage of the developed polarizer design is the option to tune its polarization characteristics by variation of the posts height. The equivalent circuit of the polarizer has been obtained using scattering and transfer matrices technique. Using this model, the polarization and matching characteristics of the suggested polarizer were optimized simultaneously using the trust region method. This method is reliable and robust since it provides good convergence properties. The novelty of this study lies in the use of a new waveguide polarizer structure based on a combination of irises and posts. Posts enable fine‐tuning of the polarizer performance, while irises promote wide operating frequency band. The following simulated characteristics of the optimal polarizer design were obtained: VSWR for the main modes of horizontal and vertical polarization is less than 1.47, the differential phase shift is within 90° ± 2.6°, the axial is less than 0.46 dB, and the XPD is higher than 32 dB in the operating frequency range. A developed polarizer can be applied in antenna feeds for satellite communication and radar systems.

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A Dual Circularly-Polarized Multilayer Reflective Surface Based on Loaded Ring Slots

Cited by 8 publications

References 25 publications

Plasma-Based Reflective Surface for Polarization Conversion

Plasma-Based Reflective Surface for Polarization Conversion

A wideband low‐profile dual‐circularly polarized reflectarray with decoupled LHCP/RHCP beams

Analytical modeling and optimization of new Ku‐band tunable square waveguide iris‐post polarizer

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