A Comparative Study of Vegetation Attenuation at Millimeter Waves Bandwidth

The development of radio communication systems makes it necessary to look for higher frequency bands to meet the growing needs of users. An increased interest in the socalled millimeter waves band raises questions about the adequacy of the use of propagation models for higher frequency ranges. An interesting aspect is vegetation attenuation which is analyzed in detail in the paper. In addition to the analysis of the components of the attenuation of the foliage, the article focuses on the implementation of the measurement campaign in the vicinity of the buildings of Poznan University of Technology. The results obtained were compared with external measurement works and the calibration of the foliage attenuation coefficients appropriate for native species of vegetation was performed.