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移动通信微波高频段微链路系统
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作者 赵家顺 《邮电设计技术》 1997年第12期19-22,共4页
结合目前移动通信的组网方式,介绍了移动通信中较理想的传输方式——微链路系统;阐述了15 GHz以上频段微链路系统的传输特点、设计方法、设备选型、频段配置、功能及应用。
关键词 移动通信 组网方式 设备选型 技术性能 微链路传输
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Effect of Sand and Dust Storms on Microwave Propagation Signals in Southern Libya
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作者 I.M. Saleh E.M. Abuhdima 《Journal of Energy and Power Engineering》 2011年第12期1199-1204,共6页
The propagation of electromagnetic waves in millimeter band is severely affected by rain, and dust particles in terms of attenuation and de-polarization. The computations of dust and/or sand storms require knowledge o... The propagation of electromagnetic waves in millimeter band is severely affected by rain, and dust particles in terms of attenuation and de-polarization. The computations of dust and/or sand storms require knowledge of electrical properties of the scattering particles and climate conditions at the studied region. To compute the effect of dust and sand particles on the propagation of electromagnetic waves, it is required to collect the sand particles carried out by the wind, measure the particles size, calculate the concentration, and carry chemical analysis of the contents, then the dielectric constant can be calculated. The main object of this paper is to study the effect of sand and dust storms on wireless communication, such as microwave links, in the southern region of Libya (Sebha, Ashati, Obari, Morzok, Ghat) by determining the attenuation. The result showed that there is some consideration that has to be taken into account in the communication power budget. 展开更多
关键词 ATTENUATION SCATTERING transmission loss.
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