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An UAV-Based Polarimetric Antenna Measurements for Radar and Communication Systems from 3 GHz to 32 GHz

In this paper, an UAV in-situ metrology concept to characterize antennas in the the far-field region, is presented. The proposed system is implemented with a quad-ridged horn as a probe and a transmitter mounted on a commercial hexacopter platform. The system was fully characterized and tested in an indoor far-field chamber to evaluate the impact of the scattering from the UAV platform on performance of the antenna probe in the transmit mode. Depending on the polarization, plane of incidence, and frequency of operation, the electromagnetic scattering of the UAV platform induces ±0.2 dB ripples in the co-polar patterns and less than 2 dB cross-polarization deterioration across the half-power beamwidth (HPBW).