| 摘要 |
1. Method of generating a control signal for the alignment of the polarisation of an aerial (A) to a beacon signal, in which the beacon signal received by the aerial is resolved by a polarisation filter (PW) into two signal components coupled with the orthogonal polarisation planes of the aerial, characterised thereby, that one of both the signal components (Px, Py) is subjected to a cyclic change between the phase states 0 degree and 180 degrees and that this signal component (Py) passing through the different phase states is superposed on the other signal component (Px) and it is then determined whether the amplitude-modulated signal (Px + Py), that has arisen through the superposition of both the signal components (Px, Py), experiences a positive or a negative amplitude change on the transition of the one signal component (Py) from one phase state into the other and by what amount the amplitude-modulated signal changes, wherein the sign of the amplitude change gives the direction, in which the aerial must be turned, and the amount of the amplitude change is a measure of the angle, through which the aerial must be turned, in order that one of its polarisation planes agrees with the polarisation plane of the beacon signal. |
