Freialdenhoven, TimTimFreialdenhovenMini Gopalakrishnan Nair, SreejithSreejithMini Gopalakrishnan NairDallmann, ThomasThomasDallmann2023-07-112023-07-112022https://publica.fraunhofer.de/handle/publica/44544510.23919/IRS54158.2022.99049952-s2.0-85140479101A fully polarimetric calibration method for a partially polarimetric Ka-band radar combined with a frequency selective twist reflector is presented. Such a system enables the capture of the entire scattering matrix by dividing the available bandwidth instead of requiring additional channels. To test this principle, a quasi-monostatic measurement setup is arranged and described in this paper. Various disturbances, among others, occur due to the use of a twist reflector, which must be taken into account and require a novel calibration approach. Therefore, a four step calibration process containing a single 22.5° oriented dihedral reference, electrical length compensation, phase band correction required by the band separation and an application of the monostatic condition is introduced. A selection of corner reflector types is used for a measurement campaign and processed by the proposed signal processing chain. Targets are clearly identified after applying Pauli decomposition to the calibrated measurement data. Eventually, various error effects are analyzed.enfrequency selective surface (FSS)Polarimetric calibrationpolarimetrypolarization rotating surfaceradartarget decompositiontwist reflectorconference paper