We introduce a radar system capable of tracking a 5mm spherical target continuously in three dimensions. The 10GHz (X-band) radar system has a transmission power of 1W and operates in the near field of the horn antennae. By comparing the phase shift of the electromagnetic wave traveling through the free space with an IQ-Mixer, we obtain the relative movement of the target with respect to the antennae. From the azimuth and inclination angles of the receiving antennae obtained in the calibration, we reconstruct the target trajectory in a three-dimensional Cartesian system. Finally, we test the tracking algorithm with target moving in circular as well as in pendulum motions, and discuss the capability of the radar system.
@article{arxiv.1603.08784,
title = {Radar for tracer particles},
author = {Felix Ott and Stephan Herminghaus and Kai Huang},
journal= {arXiv preprint arXiv:1603.08784},
year = {2017}
}