山区通信中单刃峰绕射损耗的工程化近似模型  

Engineering Approximate Model of Single Knife-edge Diffraction Loss in Mountainous Communication

作　　者：刘利强[1] 宋志群[1] 陈大勇[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]第二炮兵驻石家庄地区军事代表室,河北石家庄050081

出　　处：《无线电通信技术》2015年第1期24-27,共4页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：根据ITU-R P.526建议给出的单刃峰绕射损耗曲线,分浅绕射区和深绕射区给出了新的计算公式。在浅绕射区,针对P.526建议公式的适用范围不能覆盖一阶菲涅尔区的不足,利用曲线拟合提出了一个新的计算公式,将适用范围扩展到一阶菲涅尔区以外。在深绕射区,经过理论推导给出了采用不同参数的三种计算公式,便于理解和在山区通信工程中的应用。最后结合实践对新的计算公式进行了讨论,给出了工程应用建议。According to the single knife-edge diffraction loss curve proposed by the ITU-R P. 526,a new calculation formula is presented. In the shallow diffraction area,aiming at the deficiency that the formula proposed by the ITU-R P. 526 can＇t used in the firstorder Fresnel radius zone,a new formula is proposed by using curve fitting,and the application scope of the new formula can be extended to the first-order Fresnel radius zone. In the deep diffraction area,three formulas,that can be easily understood and be applied in mountain communication field,are derived. Finally,combined with the engineering approximate,the new formulas are discussed,and the proposal of the engineering application is given.

关 键 词：山区通信 刃峰绕射 电波传播损耗 

分 类 号：TN911.2[电子电信—通信与信息系统]