Conformal Frequency Selective Surfaces for Arbitrary Curvature

Valle, Cesar L.; Carranza, Gilbert T.; Rumpf, Raymond C.

doi:10.1109/tap.2022.3216960

Cited by 20 publications

(9 citation statements)

References 47 publications

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“…The substrate used for the proposed FSS should be a cost-effective solution, as compared with the Rogers RT Duroid substrates used in existing works. 15,18 The designs 16,19 provide a simple unit cell layout for bandpass and bandstop characteristics, but they use substrate thickness of 0.406 and 1.0 mm, which can be minimized for installation in airborne systems.…”

Section: Introductionmentioning

confidence: 99%

“…12,13 The stability of FSSs frequency response for various incident and conformal angle are notable performance metrics. 14,15 The angular stability is better in the FSS layout presented in the literature but it is a bulkier multilayer design. 16 FSS presented in works, 6,17 have stable frequency response with respect to varying angle of incidence, but the unit cell involves a via-based interlink between layers which increases fabrication complexity.…”

Section: Introductionmentioning

confidence: 99%

“…FSS presented in works, 6,17 have stable frequency response with respect to varying angle of incidence, but the unit cell involves a via‐based interlink between layers which increases fabrication complexity. The substrate used for the proposed FSS should be a cost‐effective solution, as compared with the Rogers RT Duroid substrates used in existing works 15,18 . The designs 16,19 provide a simple unit cell layout for bandpass and bandstop characteristics, but they use substrate thickness of 0.406 and 1.0 mm, which can be minimized for installation in airborne systems.…”

Section: Introductionmentioning

confidence: 99%

“…FSS layouts are used as spatial filters 7–9 ; to provide phase shift in transmitarray antennas 10,11 ; and incorporate stealth in military/domestic communication systems 12,13 . The stability of FSSs frequency response for various incident and conformal angle are notable performance metrics 14,15 . The angular stability is better in the FSS layout presented in the literature but it is a bulkier multilayer design 16 .…”

Section: Introductionmentioning

confidence: 99%

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Ultrathin and conformal frequency selective surfaces bandpass filter to eliminate the 5G bands on radio altimeters

Thulasiraman,

Alex

2024

Micro & Optical Tech Letters

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This work proposes a frequency‐selective surface‐based radome structure to selectively allow the radar altimeter operating band and also minimize the interference from Sub‐6GHz 5 G frequency bands. A Jerusalem cross and combinational loop (JCL) based frequency selective surfaces (FSS) unit cell of overall dimension 0.37λ was synthesized using a thin flexible substrate for use in fuselage of airborne systems. The proposed FSS unit cell exhibits transmission zero at 3.61 and 6.025 GHz and highly selective pass band at 4.3 GHz. The effect of bends and angle of incidence on the frequency response of the synthesized FSS was studied in transverse electric and transverse magnetic modes. A lumped element‐based equivalent circuit model for the proposed design was also presented. Finally, the fabricated prototype was experimentally validated in an Anechoic chamber setup and the suitability of the proposed FSS layers for aviation radar systems was confirmed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrathin and conformal frequency selective surfaces bandpass filter to eliminate the 5G bands on radio altimeters

Thulasiraman,

Alex

2024

Micro & Optical Tech Letters

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“…[12][13][14][15] Various forms of conformal metasurfaces have been proposed. [16][17][18] However, most of the current conformal reflective metasurfaces are passive structures. Once the structure is designed, its EM characteristics cannot be changed, lacking flexibility in manipulating EM waves.…”

Section: Introductionmentioning

confidence: 99%

Flexible Conformal Multifunctional Time‐Varying Phase‐Modulated Metasurface with Polarization Control for Radar Feature Transformation

Sun,

Xing,

Wang

et al. 2023

Advanced Optical Materials

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Reconfigurable metasurfaces have shown unprecedented capabilities in controlling electromagnetic (EM) waves in recent years and play an essential role in information manipulation. However, most research on reconfigurable metasurfaces is limited to planar rigid structures, with only one control function and suitable for specific single polarization. Achieving simultaneous control of phase, polarization, and frequency in the conformal structure has significant practical implications in many applications, but remains obviously challenging. In this paper, a flexible multifunctional time‐varying phase‐modulated metasurface (MTPM) with orthogonal polarization control is proposed for conformal applications to manipulate the spectrum distribution. It enables time encoding capability in controlling the phase characteristics of x‐ and y‐polarized EM waves individually by switching the bias voltage of the PIN diode in two directions. Discrete harmonic spectrum and continuous Doppler frequency shifts are implemented separately on two orthogonal polarizations by applying different time coding sequences. As a practical application, a conformal MTPM for radar feature transformation is explored. Multiple discrete false targets and defocusing phenomena can be realized respectively for x‐ and y‐polarized waves. Both simulated and measured results verify the validity of the proposed method and prototype.

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Mechanisms Behind the Operation of Metasurfaces

2024

Metasurface‐Driven Electronic Warfare

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Conformal Frequency Selective Surfaces for Arbitrary Curvature

Cited by 20 publications

References 47 publications

Ultrathin and conformal frequency selective surfaces bandpass filter to eliminate the 5G bands on radio altimeters

Ultrathin and conformal frequency selective surfaces bandpass filter to eliminate the 5G bands on radio altimeters

Flexible Conformal Multifunctional Time‐Varying Phase‐Modulated Metasurface with Polarization Control for Radar Feature Transformation

Mechanisms Behind the Operation of Metasurfaces

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