A frequency-independent inhomogeneous planar radome with high angular stability based on permittivity manipulating

Ghiasvand, Fazel; Heidar, Hamid; Kazerooni, Morteza; Hamidi, Emad

doi:10.1016/j.aeue.2022.154214

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…First, selecting a location x = 0.6 in the middle-temperature zone, T in (0.6) and T out (0.6) are calculated as 270.2 • C and 839.5 • C, respectively, using Equation (9). The parameters of the ablated radome wall are calculated using Equation (12), as shown in Table 1, where BA represents before ablation, AA represents after ablation, AT is the average temperature, i is the i-th layers, ε r,i is the dielectric constant, and tanδ is dielectric loss. ε r,i and tanδ can be determined based on Sections 3.1 and 4.2.…”

Section: The Influence Of Temperature and Ablation On Mrwmentioning

confidence: 99%

Electromagnetic Performance Analysis of Inhomogeneous Radome Walls Considering Temperature and Ablation

Dan,

Yang

2023

Aerospace

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The radome is an important component of the aircraft seeker. The radome of high-speed aircraft usually has ablation, which affects the electromagnetic performance of the radome. Therefore, it is important to study the electromagnetic performance of the radome wall during high-temperature ablation. However, most existing studies mainly consider the influence of temperature and ignore structural changes caused by ablation. To solve the above problems, this paper studies the influence of ablation on the electromagnetic performance of inhomogeneous radome walls (IRW) by considering the structure parameters, thermal expansion characteristics, and dielectric parameters during the ablation. The two typical types of IRW design methods are analyzed, the parameters calculation method in the ablation process is proposed, and the influence of ablation on the two types of IRW is studied. The results give the electromagnetic changing characteristics of the IRW under different ablation conditions. The contribution of this work is to lay a solid theoretical foundation for improving the performance of the radome in the ablation process, which is of great significance.

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Section: The Influence Of Temperature and Ablation On Mrwmentioning

confidence: 99%

Electromagnetic Performance Analysis of Inhomogeneous Radome Walls Considering Temperature and Ablation

Dan,

Yang

2023

Aerospace

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“…The FSS is composed of periodically arranged metallic patches or aperture elements, which exhibit distinct bandpass or band-stop filtering characteristics when interacting with electromagnetic waves 1 , 2 . Due to their excellent spatial electromagnetic filtering properties, FSS has been widely used in the development of microwave absorbers for electromagnetic stealth 3 – 7 and FSS low-scattering radomes 8 – 10 . The goal of these applications is to reduce the radar cross-section (RCS) of sensitive targets, both military and civilian 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a complementary structure-based high selectivity tri-band frequency selective surface

Li,

Weng,

et al. 2024

Sci Rep

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This work presents a novel tri-band bandpass frequency selective surface (FSS) that achieves high-order filtering responses in different frequency bands by means of a complementary structure. The proposed FSS is composed of three metal periodic arrays, which are separated by multilayer dielectric substrates. The gridded-double convoluted loop (G-DCL) structure, which is the middle layer structure, is a hybrid resonator that generates different resonant frequencies. The top and bottom layer structures are designed as complementary structures to the middle layer. To accurately describe the frequency responses, an equivalent circuit model (ECM) has been constructed over the entire band from 0 to 16 GHz. The results of the simulation indicate that the developed FSS can generate three pass-bands operating at 3.79 GHz, 8.34 GHz, and 12.52 GHz, respectively, and − 3 dB fractional bandwidths are 52.8%, 13.7%, and 19.7%. The transmission responses at the edges of each passband show a quick roll-off from the passband to the stopband, and there is significant out-of-band suppression between adjacent passbands. Moreover, the FSS maintains excellent angular and polarization stability within a 50° range. For verification, the tri-band FSS has been fabricated and tested. The experimental results match the simulation results, validating the accuracy of the FSS design.

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UWB full polarization single-plane monopulse reflector antenna

Ghiasvand

2023

Electromagnetics

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A frequency-independent inhomogeneous planar radome with high angular stability based on permittivity manipulating

Cited by 5 publications

References 41 publications

Electromagnetic Performance Analysis of Inhomogeneous Radome Walls Considering Temperature and Ablation

Electromagnetic Performance Analysis of Inhomogeneous Radome Walls Considering Temperature and Ablation

Design and analysis of a complementary structure-based high selectivity tri-band frequency selective surface

UWB full polarization single-plane monopulse reflector antenna

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