A Simple Polarization-Insensitive and Wide Angular Stable Circular Ring Based Undeca-Band Absorber for EMI/EMC Applications

Shukoor, Mohammad Abdul; Dey, Sukomal; Koul, Shiban K.

doi:10.1109/temc.2021.3075730

Cited by 37 publications

(14 citation statements)

References 30 publications

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“…From the current profile shown in Figure 11A and D, a 180 phase difference between the top and bottom currents results in magnetic or dipole resonance. 24 But, the currents at 46.1 GHz and 54.6 GHz for both FSS and ground are parallel, resulting in electric resonances. These multiple plasmonic resonances are solely responsible for these linear-cross and…”

Section: Surface Current Distribution Analysismentioning

confidence: 99%

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

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A novel broadband linear‐circular and linear‐cross polarization converter for K to Ka‐band applications is demonstrated in this work. The proposed structure primarily consists of an inductive grid in orthogonal with an H‐shaped dipole as top Frequency Selective Surface (FSS) and a modified horizontal dipole as bottom FSS; a 1 mm thin FR‐4 substrate is separating both. During transmission, it can convert the linearly polarized EM wave to a circular one, with Axial Ratio (AR) ≤ 3 dB from 13.08 to 25.13 GHz with 63.07% Fractional Bandwidth (FBW). In addition, this polarizer can work in reflection mode also when the bottom FSS is replaced by a Perfect Electrical Conductor (PEC), demonstrating the linear‐circular polarization with AR (≤3 dB) from 16.94 to 18.64 GHz (RHCP/LHCP) and 24.5–40.32 GHz (LHCP/RHCP) with FBW 9.56% (Ku‐band), and 48.81% (K‐ and Ka‐band), respectively. Besides, linear‐circular conversion, it performs linear‐cross conversion in reflection mode with polarization conversion ratio (PCR) above 90% from 19.71–22.22 GHz, 43.57–48.81 GHz, 53.50–55.32 GHz with 13.89%, 11.34%, 3.32%, FBW, respectively. The equivalent circuit model of the proposed converter is extracted. Surface current distribution profiles at multiple plasmonic resonances are investigated to understand the reason behind the multi‐polarization conversion. The performance is angular stable up to 45° for both transverse electric (TE) and transverse magnetic (TM) incidences for reflection as well as transmission modes. The unitcell is compact with periodicity 0.114λL × 0.114λL and a thickness of 0.044λL, where λL is the free‐space wavelength of the lowest frequency. This design's novelty lies in dual‐mode stable angular performance in both reflection and transmission cases. Also, highly miniaturized architecture and circular rotation switching in the consecutive bands make this design suitable for real‐time scenarios.

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Section: Surface Current Distribution Analysismentioning

confidence: 99%

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

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“…RCS reduction of the metallic object is challenging in defense and military applications. In the literature, different RCS reduction methods such as using microwave absorbers, 29 polarization converters, 2 and metallic paints coating 30 is proposed. This work explains the RCS reduction using the linear to cross reflective polarization converter.…”

Section: Radar Cross Reduction Analysis Of the Proposed Designmentioning

confidence: 99%

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

Shukoor

Dey

2022

Int J RF Mic Comp-Aid Eng

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A novel interdigital capacitance (IDC) frequency selective surface (FSS) based linear-cross reflective polarizer for K-and Ka-band applications is demonstrated in this work. The suggested device includes an IDC-loaded dipole printed on a thin FR-4 grounded dielectric substrate. From 17.02 to 37.30 GHz, it shows linear-cross conversion with a minimum 90% polarization conversion ratio (PCR) of 20.28 GHz bandwidth (74.7% fractional bandwidth [FBW]) for a y/x polarized incident electromagnetic (EM) wave. Along with linear-cross conversion, this polarizer also performs linear-circular conversions with axial ratio ≤ 3 dB in two frequency bands (Ku band-right circular, 15.13-16.15 GHz; Ka-band-left circular, 38.52-39.78 GHz) with 6.52%, and 3.14% FBW, respectively. The design performance is stable up to 45 for both transverse electric (TE) and transverse magnetic (TM) modes. The polarizer unitcell has structural dimensions 0.177 Â 0.177 Â 0.061λ 3 L , where λ L corresponds to the freespace wavelength of the lowest working frequency. The polariser's transmission line equivalent circuit model is extracted, and a good match is observed with the EM solver response. The broadband behavior of FSS and the ground plane is better understood by looking at surface current patterns at resonant frequencies. The proposed design's radar cross-section (RCS) analysis is compared to perfect electric conductor for the bistatic condition. The design novelty lies in its compact architectural volume of the unitcell 1.911 λ 3 L =1000 À), low-profile, broadband PCR response with superior angle stability, dualpolarization conversion with circular rotation switching makes it a good option for real-time applications.

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“…Electromagnetic (EM) absorbers are used to convert energy in EM waves into other forms of energy and in a variety of applications, such as EM interfaces, EM compatibility [1,2], and anechoic chambers [3]. For EM absorber applications, one can use absorbing structures such as a Jaumann absorber [4], a wedge-tapered absorber [5], or plasma [6].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Polarization-Independent, Wide-Angle, Broadband Metasurface Absorber Using Resistor-Loaded Split-Ring Resonators

et al. 2022

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Metasurface (MS) absorbers with polarization-insensitivity and wide-angle reception features have attracted much attention due to their unique absorption property. A polarization-insensitive broadband MS absorber structure, having wide-angle reception based on square split-ring resonators (SSRRs) and loaded with lumped resistors, is proposed in this paper. The proposed MS unit cell consists of a fixed-thickness FR4 dielectric substrate and a variable air-thickness substrate. The simulation results show that the proposed MS absorber is stable across a wide angular range for both normal and oblique incidences. Furthermore, the simulated results show that some parameters, such as unit-cell geometry and lumped resistors, can be varied to improve the performance of the MS absorber. The experimental results indicate that the proposed MS absorber can be achieved an absorption higher than 90% across the frequency range from 1.89 GHz to 6.85 GHz with a relative bandwidth of 113%, which is in agreement with simulation results. Thus, the proposed MS absorber can be more suitable in RF energy harvesting or wireless power transfer applications.

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A Simple Polarization-Insensitive and Wide Angular Stable Circular Ring Based Undeca-Band Absorber for EMI/EMC Applications

Cited by 37 publications

References 30 publications

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

Novel broadband angular stable linear‐circular and linear‐cross polarizer based on inductive grid loaded H‐dipole in both reflection and transmission modes

A novel broadband l inear‐cross and l inear‐circular reflective polarizer based on interdigital capacitance loaded dipole for radar cross‐section applications

Design and Analysis of Polarization-Independent, Wide-Angle, Broadband Metasurface Absorber Using Resistor-Loaded Split-Ring Resonators

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