Bearing measuring system for frequency modulation

Abstract

A bearing measuring system for determining the direction of arrival of a wave by rotating directional antennas or a goniometer to which the directional antennas are connected or rotating the directivity of such directional antennas or goniometer by electric means. The receiver of bearing measuring system of the type disclosed is usually constructed to determine the bearing of an amplitude modulated wave while confirming information about arriving waves. With a single receiver for frequency modulated waves it has been difficult to determine the bearing from adding the outputs of the directional antennas and the output of a nondirectional antenna while confirming information about arriving waves. With the system according to the present invention, it is possible with a single receiver to determine the bearing of the aforementioned frequency modulated waves while confirming information about the waves.

Dependencies are inferred from the claim text.