scholarly journals Novel Frequency-Selective Rasorber with Ultrawide Absorption Bandwidth Covering Both the X- and Ku-Bands

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1449
Author(s):  
Jie Xiong ◽  
Yanjie Wu ◽  
Yu Mao ◽  
Feng Deng ◽  
Lijie Chen ◽  
...  
Keyword(s):  
Absorption Band ◽  
Equivalent Circuit Model ◽  
Normal Incidence ◽  
Strip Line ◽  
Total Thickness ◽  
Absorption Bandwidth ◽  
Low Profile ◽  
Frequency Selective ◽  
Profile Characteristics ◽  
Transmission Layer

A novel dual-polarized transmissive/absorptive frequency-selective rasorber (FSR) with an ultrawide absorption spectrum covering both the X- and Ku-bands is proposed in this paper. The FSR is constructed from a bottom lossless transmission layer and a top lossy absorption layer, in which a resistor-loaded incurved square loop strip line structure is utilized to obtain an ultrawide absorption band. To quantitatively analyze its operation principle, an accurate equivalent circuit model of the proposed FSR was developed. A 2D prototype was designed, assembled, fabricated, and measured. The FSR exhibits an absorption band that ranges from 8.1 to 19.1 GHz (81%) under normal incidence, whereas the passband insertion loss at 4.5 GHz is less than 0.45 dB. The total thickness of the FSR is only 5.1 mm, which keeps low profile characteristics. The simulation agrees well with the measured results.

Miniaturized frequency selective surface with high angular stability

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zain Ul Abidin ◽  
Qunsheng Cao ◽  
Gulab Shah ◽  
Zaheer Ahmed Dayo ◽  
Muhammad Ejaz
Keyword(s):  
Resonant Frequency ◽  
Electric Field Distribution ◽  
Equivalent Circuit Model ◽  
Surface Current ◽  
Frequency Selective Surface ◽  
Angular Stability ◽  
Working Mechanism ◽  
Low Profile ◽  
Simple Geometry ◽  
Frequency Selective

Abstract In this paper, a miniaturized bandstop frequency selective surface (FSS) with high angular stability is presented. Each FSS element consists of four sets each consisting eight octagonal concentric interconnected loops. The four sets are connected with each other through outermost octagonal loop. The unit size is miniaturized to 0.066 λ0 at the resonant frequency of 1.79 GHz. The proposed configuration achieves excellent angular stability (only 0.025 GHz resonant frequency deviation is observed upto 83° oblique angles). The working mechanism of FSS is explained with the help of equivalent circuit model (ECM), electric field distribution, and corresponding surface current distribution. A prototype of the designed bandstop FSS is fabricated to verify the simulated frequency response. The experimental results are consistent with the simulation results. Simple geometry, low profile, high angular stability, and compact cell size are prominent features of the proposed structure.

Absorption/transmission integrated frequency selective surface with low profile and ultra-wide absorption band

2021 ◽  
pp. 1-14
Author(s):  
Wenjian Gong ◽  
Xinwei Chen ◽  
Liping Han ◽  
Li Li ◽  
Rongcao Yang ◽  
...  
Keyword(s):  
Absorption Band ◽  
Frequency Selective Surface ◽  
Low Profile ◽  
Wide Absorption Band ◽  
Frequency Selective

scholarly journals A Novel Wideband Miniaturized-Element Frequency Selective Surface

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Semyoung Oh ◽  
Hanjun Lee ◽  
Joo-Ho Jung ◽  
Gil-Young Lee
Keyword(s):  
Equivalent Circuit ◽  
Parametric Study ◽  
Equivalent Circuit Model ◽  
Frequency Selective Surface ◽  
Circuit Model ◽  
Operating Mechanism ◽  
Total Thickness ◽  
Measurement Results ◽  
Frequency Selective ◽  
The Operating Mechanism

This letter presents a novel wideband miniaturized-element frequency selective surface (MEFSS). The simulation and measurement results show that the bandwidth of the proposed MEFSS is remarkably enhanced compared to that of an original second-order MEFSS while its size and total thickness are still small. A parametric study is also conducted to understand the operating mechanism of the proposed structure. The phenomenon observed in the parametric study is explained with an equivalent circuit model.

scholarly journals Design of Wideband Absorber Based on Dual-Resistor-Loaded Metallic Strips

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
Mingxi Zhang ◽  
Binchao Zhang ◽  
Xiaochun Liu ◽  
Shining Sun ◽  
Cheng Jin
Keyword(s):  
Physical Mechanism ◽  
Equivalent Circuit Model ◽  
Normal Incidence ◽  
Dielectric Substrate ◽  
Fractional Bandwidth ◽  
Resonant Frequencies ◽  
Conducting Plate ◽  
Low Profile ◽  
Resistive Sheet ◽  
Absorption Performance

A method for designing a dual-polarized wideband absorber with low profile by using dual-resistor-loaded metallic strips is proposed in this paper. Each unit cell consists of a resistive sheet with dual-resistor-loaded metallic strips and an underlying conducting plate. Two-dimensional arrays of two unequal metallic strips are printed on the dielectric substrate, and two resistors are embedded in the metallic strips. By properly designing the resonant frequencies of these metallic strips, a wide absorption band with three resonances is obtained. An equivalent circuit model is introduced, and the current distributions are examined to understand the physical mechanism of the proposed absorber. An example of the absorber is fabricated and measured to verify our designed concept. The measured results show that the wideband absorption performance with a fractional bandwidth of 129% under the normal incidence and the stable angular response are achieved. In addition, the proposed absorber has a low profile with 0.08λL, where λL is the wavelength at the lowest operating frequency.

scholarly journals Design of Low-Profile Frequency-Selective Rasorbers Based on Three-Legged Loaded Element

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
Yu Qiang ◽  
Dongfang Zhou ◽  
Qikun Liu ◽  
Zhenning Yao
Keyword(s):  
Layer Structure ◽  
Equivalent Circuit Model ◽  
Bottom Layer ◽  
Frequency Selective Surface ◽  
Structure Model ◽  
Unit Cell Size ◽  
Low Profile ◽  
Simulation Results ◽  
Frequency Selective ◽  
Good Agreement

A novel low-profile dual-polarization frequency-selective rasorber (FSR) with a transmissive window in the absorption band is proposed in this paper. Based on the equivalent circuit model (ECM), the principles of the impedance design are theoretically derived. Then, a two-layer structure model is constructed. The top layer is composed of a lossy three-legged loaded element (TLLE), and the bottom layer is composed of a square ring bandpass frequency-selective surface (FSS). Furthermore, the strips are folded to reduce the unit cell size to stabilize the angular response. The maximum stable response angle increases from 20 to 40° due to the miniaturized design under both TE and TM polarization. The experimental results of the prototype are in good agreement with the simulation results, which validates the rationality of our design.

A Tri-band Angularly Stable Frequency Selective Surface with Controllable Resonances for EM Shielding

Frequenz ◽  
2020 ◽  
Vol 74 (1-2) ◽  
pp. 25-31 ◽  
Author(s):  
Fei Wang
Keyword(s):  
Layer Structure ◽  
Equivalent Circuit Model ◽  
Single Layer ◽  
Frequency Selective Surface ◽  
Electromagnetic Shielding ◽  
Low Profile ◽  
Stable Frequency ◽  
Simulation Results ◽  
Frequency Selective ◽  
The Operating Mechanism

AbstractIn the paper, a tri-band angularly stable frequency selective surface (FSS) with controllable resonances for electromagnetic shielding is proposed. Different from traditional single-layer structure, the FSS proposed is based on cascaded structure that creates three adjustable blocking bands around frequency 5.93 GHz, 7.33 GHz and 9.17 GHz, respectively. The designed FSS has a low profile with thickness of λ0/100, where the λ0 represents wavelength of the first band-stop resonance frequency. Besides, the proposed FSS exhibits stable frequency response up to 70° with respect to different polarizations. Therefore, this FSS is flexible and can be used in electromagnetic shielding field where needs conformal screen. To investigate and understand the operating mechanism better, a equivalent circuit model (ECM) is deduced and given in the Section 2, the calculated results match the full-wave EM simulation results perfectly. Finally, a prototype of this FSS is fabricated and measured, the measurement results are in accordance with the simulation results.

scholarly journals Design of a Novel Miniaturized Frequency Selective Surface Based on 2.5-Dimensional Jerusalem Cross for 5G Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Peng Zhao ◽  
Yihang Zhang ◽  
Rongrong Sun ◽  
Wen-Sheng Zhao ◽  
Yue Hu ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Frequency Selective Surface ◽  
Size Reduction ◽  
Two Dimensional ◽  
Physical Insight ◽  
Frequency Selective ◽  
Significant Size ◽  
Insight Into

A compact frequency selective surface (FSS) for 5G applications has been designed based on 2.5-dimensional Jerusalem cross. The proposed element consists of two main parts: the successive segments of the metal traces placed alternately on the two surfaces of the substrate and the vertical vias connecting traces. Compared with previous published two-dimensional miniaturized elements, the transmission curves indicate a significant size reduction (1/26 wavelengths at the resonant frequency) and exhibit good angular and polarization stabilities. Furthermore, a general equivalent circuit model is established to provide direct physical insight into the operating principle of this FSS. A prototype of the proposed FSS has been fabricated and measured, and the results validate this design.

A quasi‐elliptical bandpass frequency selective surface with low‐profile and miniaturization characteristics

2021 ◽  
Author(s):  
Huangyan Li ◽  
Filippo Costa ◽  
Yi Wang ◽  
Qunsheng Cao ◽  
Agostino Monorchio
Keyword(s):  
Frequency Selective Surface ◽  
Low Profile ◽  
Frequency Selective

Low-profile and Dual-polarization Water-based Frequency Selective Rasorber with Ultra-wideband Absorption

2021 ◽  
pp. 1-1
Author(s):  
Xiangkun Kong ◽  
Lingqi Kong ◽  
Shunliu Jiang ◽  
Xuemeng Wang ◽  
Yukun Zou ◽  
...  
Keyword(s):  
Ultra Wideband ◽  
Dual Polarization ◽  
Low Profile ◽  
Water Based ◽  
Frequency Selective

Ultra-Miniaturized Low-Profile Angularly-Stable Frequency Selective Surface Design

2019 ◽  
Vol 61 (4) ◽  
pp. 1234-1238 ◽  
Author(s):  
Weiyang Yin ◽  
Hou Zhang ◽  
Tao Zhong ◽  
Xueliang Min
Keyword(s):  
Frequency Selective Surface ◽  
Surface Design ◽  
Low Profile ◽  
Stable Frequency ◽  
Frequency Selective
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