Alignment Means for Directive Antennas

A method, at a first directive antenna, for determining an alignment direction towards a second antenna, the method comprising:

• moving the first directive antenna along an angular span passing a desired alignment angle along a certain direction;
• measuring a first signal power received from the second antenna using a first effective antenna aperture when moving the first directive antenna;
• measuring a second signal power received from the second antenna using a second effective antenna aperture when moving the first directive antenna;
• wherein the second effective antenna aperture is different the first effective antenna aperture;
• and
• determining the alignment direction as an angle in the angular span, at which angle a local maximum value for both the first signal power and the second signal power coincide.

A device adapted for aligning a first directive antenna in an alignment direction towards a second antenna, the device comprising:

• processing circuitry;
• memory containing instructions executable by the processing circuitry whereby the device is operative to:
• acquire measurement data regarding:
• a first signal power received from the second antenna using a first effective antenna aperture when the first directive antenna is moved along an angular span passing a desired alignment angle along a certain direction;
• and
• a second signal power received from the second antenna using a second effective antenna aperture when the first directive antenna is moved along an angular span passing a desired alignment angle along a certain direction;
• wherein the second effective antenna aperture is smaller than the first effective antenna aperture;
• determine the alignment direction as an angle in the angular span, at which angle a local maximum value for both the first signal power and the second signal power coincide.