A polarization-modulation method for simultaneous determination of the navigation bearing and roll parameters of an aircraft from orthogonally linearly polarized beacon signals is studied. Signals are emitted simultaneously from two spatially separated points in the horizontal plane with known coordinates. Onboard the aircraft, the resulting vector signals are received by an onboard receiving antenna, in the path of which a polarizing modulator is inserted. A rotating section of a circular waveguide with a quarter-wave phase plate embedded inside is used as a polarizing modulator. The bearing and roll of the aircraft are estimated at the output of a single-channel receiver from amplitudes and phases of the second and fourth harmonics of the polarization modulation frequency, respectively, contained in the envelope spectrum of the received resultant vector signals.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 92–98, March, 2021.
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Gulko, V.L., Mescheryakov, A.A. Polarization-Modulation Methods for Determining the Roll and Bearing Angles of an Aircraft using a Rotating Quarter-Wave Phase Plate. Russ Phys J 64, 470–477 (2021). https://doi.org/10.1007/s11182-021-02351-0
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DOI: https://doi.org/10.1007/s11182-021-02351-0