Harmonic radiosource phase coordinate determination radiosystem for operating in Fresnel zone

The unused potentials for harmonic signal radio-source (RS) coordinate determination in the existing phase direction-finders (PDF) with sparse antenna arrays in the Fresnel zone are shown. The approaches and scheme realizations for phase coordinate determination of radiosystems (PCDR) to estimate the bearing angle, the tilt angle for plane and spherical phase fronts and distance estimation to RS when electromagnetic wave´s phase front curvature is proposed.