Homing device based on radio waves - uses two aerials on board aircraft being guided to provide homing signal related to angle of approach to beacon

摘要

The homing device is based on the use of radio waves. It provides a homing signal whose value is related to the angle between the transmission axis of the radio waves and the axis of symmetry of a system of two aerials mounted on board the moving object being guided. The two aerials are connected to a modulator at whose output is the receiver and a detection system which provides the homing signal. A second modulator, operating at a different frequency is placed between the first modulator and the receiver. A variable gain compressor controlled by a servo-loop is placed between the receiver and the detection system.