High-Roll-Off-Rate Ultrathin Polarization-Rotating Frequency Selective Surface

Yin, Liyuan; Xue, Zhenghui; Ren, Wu; Lv, Qihao; Zhang, Binchao; Jin, Cheng

doi:10.1109/lawp.2023.3253086

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…The roll-off rate ξ, defined as |( α max –α min )/( f 3dB – f 10dB )| (dB/GHz), quantifies frequency selectivity. A higher ξ indicates superior frequency selectivity 42 , 43 . Here, α max and α min denote the 10- and 3-dB attenuation points, while f 10dB and f 3dB represent their corresponding frequencies.…”

Section: Methodsmentioning

confidence: 99%

A broadband second-order bandpass frequency selective surface for microwave and millimeter wave application

Li,

Weng,

et al. 2024

Sci Rep

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This paper presents a frequency selective surface (FSS) with a wideband second-order bandpass response in the dual-band of microwave and millimeter wave. The overall structure consists of three layers of metal pattern and two layers of thin dielectric substrate. The top and bottom metal layers have capacitive patches with integrated curled Jerusalem cross slot resonators, while the intermediate metal layer has an inductive grid structure with cross-shaped slot resonators. The incorporated slot resonators play a pivotal role in achieving the desired transmission poles or zeros, which enable a wideband second-order filtering response in the dual-band and a quick roll-off at the passband edges, increasing the efficacy of electromagnetic shielding. To fully investigate the structure's frequency response, an equivalent circuit model of the structure is created, spanning the complete frequency range of 5–50 GHz. Physical samples are created and measured to confirm the suggested approach’s efficacy. The passband center frequencies of the FSS are found at f1 = 19.42 GHz and f2 = 42.78 GHz, and the − 3 dB bandwidth is 4.34 GHz (17.25–21.59 GHz) and 8.54 GHz (38.51–47.05 GHz), respectively. The simulation results align well with the experimental data. The transmission response rapidly transitions from the passband to the stopband at the passband boundaries.

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Section: Methodsmentioning

confidence: 99%

A broadband second-order bandpass frequency selective surface for microwave and millimeter wave application

Li,

Weng,

et al. 2024

Sci Rep

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“…Ref. [21] introduces a polarization conversion with excellent roll-off features, an ultra-thin thickness, low insertion losses, and wide rejection bands. By designing a transmission structure based on polarization conversion and amplitude, a phase-independent adjustable transmitarray is realized [22], which has the characteristics of a low profile and low cost.…”

Section: Introductionmentioning

confidence: 99%

A New 1 Bit Electronically Reconfigurable Transmitarray

Zheng,

Ren,

et al. 2024

Electronics

Self Cite

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This article proposes a novel 1 bit electronically reconfigurable transmitarray, designed to facilitate digital two-dimensional beam scanning, boasting both high gain and a slim profile. The fundamental phase shifting unit of the transmitarray unit cell consists of a resonant cavity composed of a pair of orthogonal metal gates and dielectric layers, with a cross-sectional height of 0.17 λ. The middle layer of the phase-shifting unit is composed of circular gaps and C-shaped patches, and two diodes with opposite directions are loaded. By turning the diodes ON and OFF, current reversal is accomplished, allowing the unit to transition between its 0 and 1 states and achieve transmission-phase quantization. The unit’s minimal insertion loss is 0.37 dB in state 0 and 0.35 dB in state 1, respectively. In order to verify our design, we designed and processed a 16 × 16 transmitarray in the C-band. The simulated results are consistent with the experimental results. The experimental results show that the transmitarray can achieve ± 45° beam scanning on both the E-plane and H-plane, and the maximum gain is 20.59 dBi at 5 GHz, with an aperture efficiency of 20.5%.

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“…On the other hand, frequency-selective surfaces (FSSs) are immune to such shortcomings and suitable, where selective shielding is required because of their small size, low cost, stable frequency responses, ease of fabrication, and employability. FSSs are the periodic arrangement of metallic resonant elements in two or three dimensions that can allow/shield/absorb electromagnetic waves and find widespread employability, including, but not limited to, radomes [ 1 ], EM absorbers [ 2 , 3 , 4 ], polarizers [ 5 ], antenna gain enhancement [ 6 ], RF energy harvesting [ 7 ], satellite communication [ 8 ], electromagnetic interference mitigation [ 9 , 10 ], and many others.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Band Polarization-Insensitive Frequency Selective Surface for Electromagnetic Shielding Applications

Idrees,

He,

Ullah

et al. 2024

Sensors

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This paper presents a novel polarization-insensitive dual-band frequency-selective surface (FSS)-based electromagnetic shield. The miniaturized FSS unit cell consists of a modified Jerusalem crossed loop and a corner-modified square loop. These FSS elements are arranged in a co-planner configuration over a single-layer Rogers 5880 substrate and simultaneously offer effective shielding in the X- and Ku-bands. Moreover, the FSS manifests polarization-independent and angularly stable band-reject filter characteristics over various oblique angles of incidence for both the TE and TM polarizations with virtuous attenuation at both resonances. In addition, the FSS structure is modelled into an equivalent lumped circuit to better analyze the phenomenon of EM wave suppression. A finite prototype of FSS is fabricated and tested. The simulated and measured results are in good agreement, thus making it a potential candidate for RF shielding/isolation applications.

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High-Roll-Off-Rate Ultrathin Polarization-Rotating Frequency Selective Surface

Cited by 5 publications

References 26 publications

A broadband second-order bandpass frequency selective surface for microwave and millimeter wave application

A broadband second-order bandpass frequency selective surface for microwave and millimeter wave application

A New 1 Bit Electronically Reconfigurable Transmitarray

A Dual-Band Polarization-Insensitive Frequency Selective Surface for Electromagnetic Shielding Applications

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