An Empirical Expression to Estimate Specific Attenuation Coefficient due to fog at Frequencies from 100 to 300GHz

作者：Liu Yun Long^*; Hu Meng Hao

来源：Journal of Infrared Millimeter and Terahertz Waves, 2013, 34(7-8): 405-412.

DOI：10.1007/s10762-013-9982-6

• Empirical expression
• Specific attenuation coefficient
• Fog
• Millimeter wave
• Estimation performance

A simple expression is presented to quickly estimate specific attenuation coefficient due to fog within the ranges of 100 similar to 300GHz and -8 similar to 20 degrees C based on the Rayleigh approximation which is not very convenient. To evaluate the expression's estimation performance, the Pearson correlation coefficient (PCC) and maximal absolute value of the relative errors (MAVRE) are calculated. The maximum value of PCC is 1 and it reflects the fitting performance of an empirical expression. MAVRE denotes the largest deviation between a set of estimated values and corresponding theoretical values. Calculations show the PCC and MAVRE of the proposed expression are 0.99985 and 4.162%, respectively. Furthermore, a comparison analysis shows that the new expression has much better estimation performance than other two empirical expressions: the modified Mao expression and the Zhao expression.

• 出版日期2013-8
• 单位北京航空航天大学; 昆明物理研究所