Low-Profile Compact Dual-Band Unit Cell for Polarizing Surfaces Operating in Orthogonal Polarizations

Tang, Wenxing; Mercader-Pellicer, Salvador; Goussetis, George; Legay, Hervé; Fonseca, Nelson J. G.

doi:10.1109/tap.2016.2647691

Cited by 50 publications

(29 citation statements)

References 15 publications

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“…The goal is to maximize the transmission at two frequencies and shape the AR response according to the project specifications. Multi-layer FSS-based structures have been proposed operating either in reflection [19]- [23] or transmission [24], [25]. In [25], the entries of ECMs are obtained by performing optimizations in Keysight Advanced Design System (ADS) [28].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band, Orthogonally-Polarized LP-to-CP Converter for SatCom Applications

Mastro¹,

Ettorre²,

Grbic³

2020

IEEE Trans. Antennas Propagat.

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A systematic design of dual-band, orthogonallypolarized linear-to-circular polarization (LP-to-CP) converters is proposed. This class of polarization converters can transform linearly-polarized waves into right-and left-hand circularlypolarized (RHCP and LHCP) waves in two separate non-adjacent frequency bands. The reported polarizer is made of three cascaded bianisotropic sheet admittances, spaced by two isotropic dielectric slabs. The electromagnetic problem is studied by means of impedance boundary conditions. A transmission-matrix analysis of periodically-loaded transmission-lines is employed in design. An analytic model is developed and closed-form expressions are derived for the frequency response of each sheet admittance. This method avoids the use of multi-parameter optimization procedures. An example of a dual-band, orthogonally-polarized LP-to-CP converter is proposed for satellite communication applications in the K/Ka-band. The polarizer separately performs LP-to-LHCP and LP-to-RHCP conversions over the transmitting and receiving channels of the K/Ka-band. The design is validated with a prototype. Under normal incidence, the polarizer exhibits axial ratios (ARs) lower than 3 dB over the 18-22.2 GHz (∼21%) and 28.7-30.4 GHz (∼6%) bands. The total transmission is above-1 dB within the same two bands. The performance is stable for scanning angles up to ±45 •. For a 45 • angle of incidence, the AR is lower than 3 dB in the bands 17-22 GHz (∼25.6%) and 28.6-30 GHz (∼4.7%) with a total transmission higher than-1.2 dB.

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Section: Introductionmentioning

confidence: 99%

Dual-Band, Orthogonally-Polarized LP-to-CP Converter for SatCom Applications

Mastro¹,

Ettorre²,

Grbic³

2020

IEEE Trans. Antennas Propagat.

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“…So far, research efforts have mainly concentrated on the development of PCB polarizing screens. Recent proposals consist on PCB screens with wideband operation [19] or multiband behaviour [20], [21]. Very few examples consider cells with 3-D topologies, some of them are discussed next.…”

Section: Introductionmentioning

confidence: 99%

All-Metal 3-D Frequency-Selective Surface With Versatile Dual-Band Polarization Conversion

Jiménez

Menargues²,

Garcia-Vigueras

2020

IEEE Trans. Antennas Propagat.

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A dual-band periodic structure is here proposed, which allows for versatile frequency selectivity and polarization conversion functionality. The structure is a monolithic fullmetal piece, and it is built from the arrangement of unit-cells consisting of waveguide sections at cutoff loaded with compound perforations. The topology of such unit-cells enables the efficient and independent interaction with vertical and horizontal electric field components illuminating the periodic structure. A circuit model is proposed to characterize the cells and understand their behaviour. Three different examples of cells are designed to illustrate the structure versatile functionality. One of these examples is manufactured, consisting of a dual-band structure that converts linear polarization into circular with orthogonal senses of rotation at each band. The experimental results are in good agreement with the theoretical predictions, thus validating the underlying operation mechanism and its practical feasibility.

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“…Metasurface (MS) has been increasingly adopted as an alternative to parabolic reflectors for polarisation conversion [1][2][3][4][5][6][7][8]. MS-based polarisation converters are utilised in a number of applications, including telecommunication satellites [1], radar or space antennas [2].…”

Section: Introductionmentioning

confidence: 99%

Broadband linear‐to‐circular polarisation conversion using the diamond‐shaped reflecting metasurface

Chaihongsa

Kuse

Furuya

et al. 2020

IET Microwaves, Antennas & Propagation

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To overcome the narrow axial ratio (AR) bandwidth inherent in conventional linearly to circularly polarised converters, this research proposes a metasurface (MS) with a diamond‐shaped configuration that can mitigate the effect of surface wave (SW) along the MS edge and achieve a wider 3 dB AR bandwidth. The diamond‐shaped MS structure is realised by slanting a square MS by 45°, and it consists of constituent unit cells of rectangular and arbitrary shapes. The rectangular unit cells are positioned 45° to the square dielectric substrate, and the unit cells along the MS edge are partially cut into arbitrary shape to be perfectly aligned along the edge. The 3 dB AR bandwidths and degradation of the MS are characterised by SW and magnetic current distribution. Simulations are carried out and an MS prototype is fabricated to verify the results. The effects of partially cut unit cells (PCUCs) along the MS edge on the SW are characterised. The simulation and measured 3 dB AR bandwidths of the diamond‐shaped MS are 37.6 and 28.8%, respectively. The novelty of the proposed diamond‐shaped MS polarisation converter lies in the implementation of arbitrary‐shaped PCUCs and the use of the diamond‐shaped configuration in place of conventional square geometry to realise wider AR bandwidth.

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Low-Profile Compact Dual-Band Unit Cell for Polarizing Surfaces Operating in Orthogonal Polarizations

Cited by 50 publications

References 15 publications

Dual-Band, Orthogonally-Polarized LP-to-CP Converter for SatCom Applications

Dual-Band, Orthogonally-Polarized LP-to-CP Converter for SatCom Applications

All-Metal 3-D Frequency-Selective Surface With Versatile Dual-Band Polarization Conversion

Broadband linear‐to‐circular polarisation conversion using the diamond‐shaped reflecting metasurface

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