Adaptive radio reception aerial system - has main reflector aerial and several reference radiators producing minimum sensitivity in noise source directions

摘要

The aerial system minimises noise interference signals originating from discrete directions. It consists of a number of radiators arranged in a group, and of a correlation an feed-back network for each radiator direction, controlling amplitudes and phases in the radiator group. These networks are provided between individual signal receiving radiators on one hand, and an output combining the signals on the other. One of the radiators is a sharply focussed scanning reflector aerial. The other radiators are reference radiators whose number corresponds to that of suppressable interference sources. The adaptive correlation and feedback network correlates only the levels of secondary lobes of the reflector aerial with the level of one or several reference aerials so that the resultant secondary lobe characteristic of the reflector aerial is so modified, that a level minimum appears in the direction(s) of noise sources.