“…It is found that the biomaterial has good extinction performance in the far IR band, and its average extinction efficiency factor is positively correlated to the size factor and porosity. Huang Baokun et al [27,28] studied the influence of flocculent biological particle structure on the extinction performance in wide band, and found that in far IR band, the extinction performance of biological particles is positively related to the number and length of branches; In millimeter wave band, the extinction performance of biological particles is positively related to the length of particle branches but independent of its number of branches.…”