干旱区电磁散射的SMCG研究

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Frequenz Pub Date : 2023-03-06 DOI:10.1515/freq-2022-0108

F. Jiang

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引用次数: 0

摘要

摘要本文对干旱区电磁散射特性进行了研究，并提出了环境监测和改善方法。建立了四分量土壤介电常数模型，研究了土壤介电常数与土壤水分和频率的关系。采用蒙特卡罗方法结合高斯谱函数模拟实际干燥地面，建立了基于表面电流方程的稀疏矩阵/规范网格(SMCG)算法模型计算干旱区电磁散射系数。为了验证该算法的正确性，将SMCG计算结果与矩量法(MOM)计算结果进行了比较，结果表明两者具有较好的一致性。本文以内蒙古额济纳旗东南部土壤实测数据为例，应用该算法得到了许多结果。结果表明，土壤含水量、地表粗糙度和入射电磁波段对散射回波均有影响，且呈规律性变化。研究结果对干旱区土壤水分监测、荒漠化防治和农业种植具有指导意义。

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SMCG research on electromagnetic scattering in arid area

Abstract This article is devoted to the study of electromagnetic scattering characteristics in arid areas, and proposes environmental monitoring and improvement methods. A four-component soil dielectric model was established to study the relationship of soil dielectric constant with soil moisture and frequency. As the Monte Carlo Method combined with Gaussian spectral function was used to simulate the actual dry ground, the Sparse Matrix/Canonical Grid (SMCG) algorithm model based on the surface current equation was established to calculate the electromagnetic scattering coefficient of arid areas. To verify the correctness of the proposed algorithm, the results obtained by SMCG was compared with those calculated by Method of Moments (MOM), which showed great consistency. Many results were obtained by using the algorithm in this paper, based on the measured soil data in the southeastern area of Ejin Banner, Inner Mongolia. It was found that soil moisture content, area roughness and incident electromagnetic wave segment had influence on the scattering echo and showed regular change. The results of this paper are of guiding significance for soil moisture monitoring, desertification control and agricultural planting in arid areas.

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来源期刊

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.