Hattenhorst, B.B.HattenhorstBaer, C.C.BaerMusch, T.T.MuschJaeschke, T.T.JaeschkePohl, N.N.Pohl2022-03-052022-03-052016https://publica.fraunhofer.de/handle/publica/25486210.1515/freq-2016-0216In this contribution, a composite measurement concept for the gas flow determination in diverse stream scenarios is presented. The approach utilizes the pressure- and mixing-dependent relative permittivity of gaseous media, which, in case of a vortex or a marker gas, creates a detectable variation in the measuring beam of the radar. Since the measurement effect is very small, phase measurements based on highly precise and low jitter frequency-modulated continuous-wave radar systems in different frequency bands are applied. Moreover, disturbances caused by vibrations of the measurement setup are compensated out of the measurement signal.en621journal article