Design of Active Frequency Selective Surface with Curved Composite Structures and Tunable Frequency Response

Lee, In Gon; Park, Yong Bae; Chun, Hye‐Yeong; Kim, Yoon Jae; Hong, Ic‐Pyo

doi:10.1155/2017/6307528

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…However, the angle of the incident to the nearby tilted cell array element on the curved CFSS is becoming large as compared to the planar CFSS, which creates an increasing phase difference in the magnetic field concerning the incident plane wave and therefore inter-element coupling among the unit cells are deteriorates noticeably. The weak coupling among the unit cell boundary contributes to the parallel inductive effect which is ultimately responsible for the sharpness of the passband [44, 45]. The shifting of transmission zero toward the pole ultimately enhances the ROC to 75.7 dB/GHz as compared to the planar structure with ROC 16.28 dB/GHz.…”

Section: Conformal Behavior Of Single and Double Layer Complementary Fssmentioning

confidence: 99%

Compact, flexible and highly selective wideband complementary FSS with high angular stability

Coomar

Mondal

Sanyal

2021

Int. J. Microw. Wireless Technol.

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This article presents a novel miniaturized (0.105λ0 × 0.105λ0) flexible complementary frequency selective surfaces (CFSS) structure with sharp band edge selectivity and very high angular stability. To explore two diverse applications as a passband and stopband filter, a novel complementary convoluted square loop (CCSL) type structure has been designed and investigated on ultrathin dielectric material of thickness 0.0023λ0. The second-order wide controllable passband with fractional bandwidth of 19.23% (−3 dB) and remarkably wide stopband of 64.7% (−10 dB) and 54.8% (−20 dB) respectively have been achieved by using a cascaded resonating structure which is composed of asymmetrical meandered CCSL array, arranged on two ultrathin dielectric layers with air foam separation. This particular format would lead to sharp band edge selectivity with steep roll-off (72.43 dB/GHz) and an excellent passband selectivity factor (0.731). An equivalent lumped LC circuit in conjunction with the transmission line model has also been adopted to comprehend the physical mechanism of the proposed single layer and double layer structures. Further, better passband and stopband angular stability at an oblique incident angle of 45° and the bending characteristics have also been investigated thoroughly for the proposed flexible CFSS to check their employability in different conformal structures with WiMAX passband and WLAN stopband application.

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Section: Conformal Behavior Of Single and Double Layer Complementary Fssmentioning

confidence: 99%

Compact, flexible and highly selective wideband complementary FSS with high angular stability

Coomar

Mondal

Sanyal

2021

Int. J. Microw. Wireless Technol.

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“…Together with the use of composite materials that have excellent mechanical and electromagnetic properties, the co‐curing process for three‐dimensional (3D) construction is an essential factor that must be addressed during radome fabrication to ensure robustness against various environmental factors and operational stability. Even though it is difficult to ensure stable electrical properties in lumped elements owing to thermal factors (such as thermal stress and curing temperature) and mechanical factors (such as mechanical stress, pressurization, and shaping), few studies have been conducted to resolve this problem …”

Section: Introductionmentioning

confidence: 99%

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

Lee

Kim

2019

Micro & Optical Tech Letters

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This study uses screen-printing technology to create resistive components by employing carbon-based electric ink (55 Ω/□) printing, and an absorptive frequency selective surface (FSS) was designed with absorptive properties in the C-band and transmissive properties in the X-band. This was done to ensure structural stability and to overcome the limitations of lumped-element-based absorptive-FSS, which make it difficult to ensure the stability of electrical properties owing to thermal and mechanical factors in the hybrid composite laminated structure. The proposed structure reduces parasitic components by substituting printed resistive components instead of the lumped element having the weakness of a difficult to predict electrical performance according to the frequency band. Fabrication and measurement tests were performed to verify the performance of the proposed structure by comparing the frequency response properties in normal and oblique incidence conditions, the measured results show good agreement with the simulation results. K E Y W O R D Sabsorptive frequency selective surface, hybrid composite, oblique incidence, radome, screen-printing

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“…In addition, there are uncertainties like tolerance, parasitic effects about the electrical performance of lumped elements in a high-frequency band. Nevertheless, very few studies have been conducted to solve these problems [8,9].…”

mentioning

confidence: 99%

Chipless frequency selective rasorber with stable performance for oblique incidence

Lee

Kim

et al. 2019

Electron. lett.

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This Letter presents the design of a frequency-selective rasorber that selectively absorbs undesired (out-of-band) signals and selectively transmits desired (in-band) signals by using planar resistor technology without lumped elements. To implement the selective absorption characteristic on the upper surface, a lossy layer was implemented in the proposed structure by using a nickel-phosphorus metal alloy-based resistor-conductor material. Furthermore, stable transmissive/absorptive performance against polarisation and incidence angle was implemented by laminating a quarter-wavelength thickness of dielectric spacer and bandpass type frequency selective surface together. The resulting design was verified through experimental measurements.

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Design of Active Frequency Selective Surface with Curved Composite Structures and Tunable Frequency Response

Cited by 7 publications

References 22 publications

Compact, flexible and highly selective wideband complementary FSS with high angular stability

Compact, flexible and highly selective wideband complementary FSS with high angular stability

Practical absorptive frequency selective surface based on printed electronics technology for radome applications

Chipless frequency selective rasorber with stable performance for oblique incidence

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