Rheological investigations on frequency selective surface carbon composite microwave absorber.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Horizons Pub Date : 2024-10-23 DOI:10.1039/d4mh00993b

Priyanka, Prashant S Alegaonkar, Himangshu B Baskey

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Abstract

A high-performance stealth platform is one of the crucial requirements in defence technology that could practically be realized by building effective microwave frequency selective surface (FSS) absorbers. Herein, we report the design and manufacturing of an absorber by tuning the rheology of cell architecture. Initially, a fan-shaped cell (10.4 mm²) was designed for its surface and bulk rheology. The FSS overlayer composition was investigated using SEM, EDX, and XRD and tuned for 0.25% carbon: 1.5% silver to achieve the ink resistivity ∼255 Ω □^-1. The bulk rheology was optimized for air (Roha) spacer (thickness ∼2.8 mm), interlayer dielectrics (0.2 mm each), carbon composition (5%), and cell dimension (10.2 mm). Analyses are presented for absorption loss (R_C, dB), bandwidth (GHz), resonance dispersion, and constitutive (ε, μ) parameters, compounded with an equivalent circuit model with the settings R = 273.55 Ω, L = 2.25 nH, C = 0.057 pF and the Fabry-Perot reactance mode@10 GHz. The bi-modal response was investigated for induced polarization, electromagnetic fields, volume power distribution, and angular (Θ = 0°-50°) and rotational stability (Φ = 0°-90°) against TE/TM incidences. The FSS pattern was implemented using a screen printing technique to fabricate a prototype absorber and subjected to the free space measurements in an anechoic chamber. The prototype behaviour was found to be commensurate with the simulated performance, thereby achieving a figure of merit of R_C ∼-25 dB@10 GHz, accessible bandwidth 4 GHz (in X band) by using the thickness of 0.057 λ₀. Details are presented in this study.

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频率选择性表面碳复合微波吸收器的流变学研究。

高性能隐形平台是国防技术的关键要求之一，而建造有效的微波频率选择性表面（FSS）吸收器可以切实实现这一要求。在此，我们报告了通过调整电池结构的流变性来设计和制造吸收器的情况。起初，我们设计了一个扇形电池（10.4 平方毫米），以确定其表面和体积流变。利用 SEM、EDX 和 XRD 研究了 FSS 覆盖层的组成，并调整为 0.25% 碳：1.5% 银，以达到油墨电阻率 ∼255 Ω □-1。针对空气（Roha）间隔物（厚度 ∼ 2.8 毫米）、层间电介质（每层 0.2 毫米）、碳成分（5%）和电池尺寸（10.2 毫米）对体流变进行了优化。对吸收损耗 (RC，dB)、带宽 (GHz)、共振频散和构成参数 (ε, μ) 进行了分析，并结合等效电路模型进行了设置：R = 273.55 Ω、L = 2.25 nH、C = 0.057 pF 和法布里-珀罗电抗模式@10 GHz。研究了双模响应的诱导极化、电磁场、体积功率分布以及针对 TE/TM 事件的角度稳定性（Θ = 0°-50°）和旋转稳定性（Φ = 0°-90°）。利用丝网印刷技术实现了 FSS 图案，制作了吸收器原型，并在电波暗室中进行了自由空间测量。结果发现，原型的性能与模拟性能相符，通过使用 0.057 λ0 的厚度，实现了 RC ∼-25 dB@10 GHz 的优点系数，可访问带宽为 4 GHz（X 波段）。详细内容见本研究报告。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.