森林环境电波传播抛物方程模型的改进研究

张青洪; 廖成; 盛楠; 陈伶璐

doi:10.7498/aps.62.204101

摘要

将森林看成空气和植物组成的混合物, 应用两相混合物折射模型求解了森林的等效介电常数, 通过与实验结果的对比, 验证了该模型的正确性. 将该森林介电常数求解方法引入到抛物方程的森林模型中, 改进了抛物方程的森林模型. 相对于传统的森林环境电波传播模型, 该模型能考虑森林各组成要素对电波传播的影响, 更适合于实际不同地区、不同种类植物分布的森林环境中电波传播特性的求解. 此外, 引入了非均匀网格技术, 有效提高了大区域森林环境中电波传播问题的求解效率.最后基于该模型仿真分析了森林的植物体积含量、重量含水量等要素对电波传播特性的影响.

关键词:

Abstract

Regarding the forest as a mixture of air and plants, the refractive model is used to obtain the effective dielectric constant of forest, and the correctness is verified by comparing with the experimental result. The parabolic equation model of forest can be improved by introducing the method of effective dielectric constant for forest. Compared with the traditional model, the improved model takes into account the effect of various elements of forest on radio wave propagation and is more suitable for the radio propagation problems with different plant species in different regions. Otherwise the non-uniform mesh technique is introduced and improves the computational efficiency effectively. Finally, in this paper we analyze the effects of various elements of forest, such as the volume content of plant, the gravimetric moisture content, etc. on the radio propagation.

Keywords:

作者及机构信息

1.
西南交通大学电磁场与微波技术研究所, 成都 610031

基金项目: 国家自然科学基金委和中国工程物理研究院联合基金(批准号：U1330109)、高等学校博士学科点专项科研基金(批准号: 20120184110013)和中央高校基本科研业务费(批准号: SWJTU12ZT08)资助的课题.

Authors and contacts

1.
Institute of Electromagnetics Southwest Jiaotong University, Chengdu 610031, China

Funds: Project supported by the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1330109), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120184110013), and the Fundamental Research Fund for the Central Universities, China (Grant No. SWJTU12ZT08).

参考文献

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[2]	Zhang J P, Wu Z S, Zhao Z W, Zhang Y S, Wang B 2012 Chin. Phys. B 21 109202
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[8]	Leontovich M A, Fock V A 1946 J. Phus USSR 10 13
[9]	Wang K, Long Y L 2012 IEEE Trans. Antennas Propagat. 60 4467
[10]	Sirkova I 2011 Prog. Electromagnet. Res. M 17 151
[11]	Tamir T 1967 IEEE Trans. Antennas Propagat. 15 806
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[14]	Guo J Y, Wang J Y, Long Y L 2008 Chin. J. Radio Sci. 22 1042 (in Chinese) [郭建炎, 王剑莹, 龙云亮 2008 电波科学学报 22 1042]
[15]	Levy M F 2000 Parabolic Equation Methods for Electromagnetic Wave Propagation (London: IEE Press) p5
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[23]	Arshad K, Katsriku F, Lasebae A 2006 Information and Communication Technologies Damascus, Syria, April 24, 2006 p2146

施引文献

[1]	Liu X C, Gao T C, Qin J, Liu L 2010 Acta Phys. Sin. 59 2156 (in Chinese) [刘西川, 高太长, 秦健, 刘磊 2010 59 2156]
[2]	Zhang J P, Wu Z S, Zhao Z W, Zhang Y S, Wang B 2012 Chin. Phys. B 21 109202
[3]	Ren X C, Guo L X, Jiao Y C 2012 Acta Phys. Sin. 61 144101 (in Chinese) [任新成, 郭立新, 焦永昌 2012 61 144101]
[4]	Shao X, Chu X L, Wang J, Xu J J 2012 Acta Phys. Sin. 61 159203 (in Chinese) [邵轩, 楚晓亮, 王剑, 许金菊 2012 61 159203]
[5]	Du H, Wei G, Zhang Y M, Xu X H 2013 Acta Phys. Sin. 62 064704 (in Chinese) [杜辉, 魏岗, 张原铭, 徐小辉 2013 62 064704]
[6]	Cai Z R, Liu Y H, Zhang X L 1997 J. China Institute Commun. 18 87 (in Chinese) [蔡植荣, 刘永华, 章秀麓 1997 通信学报 18 87]
[7]	Guo J Y, Wang J Y, Long Y L, Gong Z Q 2008 Chin. J. Radio Sci. 23 1045 (in Chinese) [郭建炎, 王剑莹, 龙云亮, 龚主前 2008 电波科学学报 23 1045]
[8]	Leontovich M A, Fock V A 1946 J. Phus USSR 10 13
[9]	Wang K, Long Y L 2012 IEEE Trans. Antennas Propagat. 60 4467
[10]	Sirkova I 2011 Prog. Electromagnet. Res. M 17 151
[11]	Tamir T 1967 IEEE Trans. Antennas Propagat. 15 806
[12]	Palud M L 2004 IEEE Military Communications Conference Monterey, CA, October 31-November 3, 2004 p609
[13]	Holm P, Eriksson G, Krans P, Lundborg B, Lofsved E, Sterner U, Waern A 2002 The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Lisboa, Portugal, September 15-18, 2002 p140
[14]	Guo J Y, Wang J Y, Long Y L 2008 Chin. J. Radio Sci. 22 1042 (in Chinese) [郭建炎, 王剑莹, 龙云亮 2008 电波科学学报 22 1042]
[15]	Levy M F 2000 Parabolic Equation Methods for Electromagnetic Wave Propagation (London: IEE Press) p5
[16]	Feit M D, Fleck J A 1978 Appl. Opt. 17 3990
[17]	Harris J F 1978 IEEE Proc. 66 51
[18]	Ulaby F T, Razani M, Dobson M C 1983 IEEE Trans. Geosci. Remote Sens. GE-21 51
[19]	Ulaby F T, EI-Rayes M A 1987 IEEE Trans. Geosci. Remote Sens. GE- 25 550
[20]	Schmugge T J, Jackson T J 1992 IEEE Trans. Geosci. Remote Sens. GE-30 757
[21]	Jackson T J, Schmugge T J 1991 Geoscience and Remote Sensing Symposium Espoo, Finland, June 3-6, 1991 p753
[22]	Oraizi H, Hosseinzadeh S 2003 Proceeding of International Symposium of TelecomunicationIsfahan, Iran, August, 2003 p340
[23]	Arshad K, Katsriku F, Lasebae A 2006 Information and Communication Technologies Damascus, Syria, April 24, 2006 p2146

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