Optimization of C-like sandwich wall structure for high microwave transmission

IF 3.1 3区 物理与天体物理 Q2 Engineering Optik Pub Date : 2024-11-01 DOI:10.1016/j.ijleo.2024.172096
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Abstract

A multilayered structure of five planar slabs ((Glass epoxy/PU Foam/Vacuum/PU Foam/Glass epoxy) was investigated for broadband microwave propagation. In this study, theoretical calculations of the transmittance, reflectance and absorbance characteristics of the multilayer structure were carried out using the ABCD transfer matrix method, and numerical calculations were obtained using the COMSOL Multiphysics simulation software. The propagation characteristics were investigated as a function of frequency up to the Ka-band and versus angle of incidence ranging from normal to grazing incidence. The results of the theory and simulation were in excellent agreement. The average transmittance for unpolarized or circularly polarized wave was 97% over the S to the K bands, whereas up to 86% transmission was observed at the end of the Ka-band. Higher than 95% transmission of incident waves with frequency 10 GHz was observed over a wide range of angles of incidence up to 70°, after which the transmittance decreased sharply to zero at a grazing incidence (θ1=90°). The results revealed that the absorbance is negligibly small and the incident energy was either transmitted or reflected. The reflectance for both TE and TM wave modes increased appreciably in the angular range 75°θ190° and approached 100% at grazing incidence. The curves of the reflectance versus angle of incidence for representative frequencies in the S and X bands revealed a Brewster-like effect for the TM wave mode, while the reflectance of the TE mode varied monotonically, without showing a minimum characteristic of a Brewster-like reflectionless condition.
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用于高微波传输的 C 型夹层壁结构优化
研究了由五块平面板(玻璃环氧树脂/聚氨酯泡沫/真空/聚氨酯泡沫/玻璃环氧树脂)组成的多层结构的宽带微波传播。在这项研究中,使用 ABCD 传递矩阵法对多层结构的透射率、反射率和吸收率特性进行了理论计算,并使用 COMSOL Multiphysics 仿真软件进行了数值计算。研究了从频率到 Ka 波段的传播特性,以及从法线入射到掠入射的入射角。理论和模拟结果非常吻合。从 S 波段到 K 波段,非极化或圆极化波的平均透过率为 97%,而在 Ka 波段末端观察到的透过率高达 86%。在高达 70° 的宽入射角范围内,频率为 10 GHz 的入射波的透射率高于 95%,此后,在掠入射角(θ1=90°)处,透射率急剧下降至零。结果表明,吸收率非常小,入射能量要么被传输,要么被反射。在 75°≤θ1≤90°的角度范围内,TE 波和 TM 波模式的反射率明显增加,在掠入射时接近 100%。S 波段和 X 波段代表性频率的反射率随入射角变化的曲线显示,TM 波模式具有类似布儒斯特的效应,而 TE 波模式的反射率则单调变化,没有显示出类似布儒斯特的无反射条件的最小特征。
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来源期刊
Optik
Optik 物理-光学
CiteScore
6.90
自引率
12.90%
发文量
1471
审稿时长
46 days
期刊介绍: Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.
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