Vegetation Loss Measurements at 9.6, 28.8, 57.6 and 96.1 GHz Through a Conifer Orchard in Washington State

摘要

Propagation measurements were made in the Olympic National Forest of Washington State during October 1987 to examine millimeter-wave signal propagation through conifer vegetation. Linearly polarized continuous-wave signals at 9.6, 28.8, 57.6, and 96.1 GHz were used to evaluate attenuation, depolarization, and backscattering from conifer trees. Azimuth and elevation scans were conducted for various transmitter heights and path lengths. Results from the measurements are presented and compared with data gathered from similar measurements taken through deciduous vegetation.