The reduction of interference from large reflecting surfaces

Jull, E.V.; Ebbeson, Gordon R.

doi:10.1109/tap.1977.1141640

Cited by 31 publications

(5 citation statements)

References 7 publications

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“…Based on the transmission-line theory, the detailed analysis model and design equations of the meander-line polarizer can be found in [3] and [4]. Similar works were demonstrated in [5] and [6]. This kind of polarizer has wide bandwidth and low insertion loss.…”

Section: Introductionmentioning

confidence: 68%

A Thin Reflective Diffraction Grating Employing Resonant Structures

Thain

Jaber²,

Herve

et al. 2015

IEEE Trans. Antennas Propagat.

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Reflective diffraction gratings consist of a periodic threedimensional structure that produces appropriate constructive and destructive interference in order to redirect an incoming wave as a function of frequency. Depending upon the angle of incidence, the thickness required for this structure can range from a fraction of a wavelength to several wavelengths. While such a thickness does not present a problem for optical applications, it can make the diffraction grating very bulky for radio applications, notably in the lower frequency bands. This communication presents a new thin diffraction grating, employing resonant structures, whose thickness is only 1/34th of a wavelength. Simulations and measurements are presented for a thin diffraction grating, designed to operate in the VHF band in unfavorable outdoor conditions. Abstract-A new single-layer linear-to-circular polarizer is presented in this communication. A novel hybrid meander line and loop configurationis employed to transform linearly polarized field to circularly polarized field over a wide frequency band. Numerical simulations indicate that the proposed polarizer is robust under oblique and deflected illuminations. A prototype of the proposed polarizer is designed and fabricated. Measured results show that the band of axial ratio less than 3 dB ranges from 18 to 29 GHz with about 3-dB insertion loss.

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Section: Introductionmentioning

confidence: 68%

A Thin Reflective Diffraction Grating Employing Resonant Structures

Thain

Jaber²,

Herve

et al. 2015

IEEE Trans. Antennas Propagat.

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“…Despite being a relatively new topic, there are older references in the LIS literature [ 13 ]. The term LIS has gained evidence and prominence and become a relevant bet for the technological industry and also academic research as a promising alternative to improve spectral efficiency (since it can act passively, without energy expenditure), decrease the bit error probability, and allow the erasure of channels for eavesdroppers using beamforming techniques, allowing a more elaborate approach of physical layer security.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Analysis of a Mu-MIMO LIS-Aided Communication Systems under Nakagami-m Fading Channels

Ferreira,

Fraidenraich,

de Figueiredo

et al. 2024

Sensors

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This study evaluates the performance of large intelligent surface (LIS) technology in the context of a multi-user MIMO mobile communication system (Mu-MIMO) proposed for the sixth generation (6G). LIS employs digitally controlled reflectors to enhance Signal-to-Interference plus Noise Ratio (SINR) and establish line of sight (LoS) connectivity in non-LoS environments, improving transmission security. Analytical expressions are derived to assess LIS performance metrics, including distribution parameters, bit error probability, and secrecy outage probability, considering the presence of eavesdroppers and environmental fading. The study highlights the potential of LIS technology to enhance the confidentiality and reliability of digital communication systems in next-generation networks.

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“…Moreover, RAM based solutions are not rigid and susceptible to degradation in harsh environments. Another technique, which circumvents the heating problem and can have a rigid metallic profile, is based on diffraction gratings [1,4] where the reflected power is redirected eliminating both specular reflection [5][6][7] and backscattering [8]. At difference with RAM solutions, gratings absorb only a small amount of the incident energy and can be used in high power systems.…”

Section: Introductionmentioning

confidence: 99%

Wideband backscattering reduction at terahertz using compound reflection grating

2017

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Backscattering reduction is usually achieved by using either absorbers or diffractions gratings at the expense of a narrow bandwidth. In this paper, we propose a different strategy based on a metallic compound reflection grating (CRG). We demonstrate that this structure allows a strong and broadband (fractional bandwidth, FBW ≈57%) backscattering reduction in the terahertz (THz) range by efficiently transferring the incident energy to the diffracted modes. The design is analyzed in terms of equivalent circuit and numerical simulations and the results are corroborated by a manufactured prototype operating at 0.35 THz.

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The reduction of interference from large reflecting surfaces

Cited by 31 publications

References 7 publications

A Thin Reflective Diffraction Grating Employing Resonant Structures

A Thin Reflective Diffraction Grating Employing Resonant Structures

Secrecy Analysis of a Mu-MIMO LIS-Aided Communication Systems under Nakagami-m Fading Channels

Wideband backscattering reduction at terahertz using compound reflection grating

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