A model to estimate the path loss in areas with foliage of trees

• Autor(a) principal: Azevedo, Joaquim A.
• Data de Publicação: 2017
• Outros Autores: Santos, Filipe E.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.13/2574
• topic: Propagation loss; Attenuation measurements; Propagation model; Foliage path loss; .; Faculdade de Ciências Exatas e da Engenharia

This paper presents an empirical model to predict attenuation in forest environments considering parameters related to vegetation. Typically, environmental parameters are only included in theoretical models, but they are more difficult to apply. The developed model uses tree density, average tree canopy diameter and foliage density as input parameters. The foliage density is very difficult to determine since it depends on the characteristics of trees. A simple metric of this parameter was obtained by measuring the background light silhouetted by the canopy. The model was developed with measurements obtained in different forest environments for two frequencies within the UHF band (Ultra High Frequency). A procedure was also applied to extend the operating frequency range of the model.