US Patent 11387558 Loop antenna polarization control

A system and method for adjusting polarization of a loop antenna includes a loop antenna with a high impedance autotransformer. The high impedance autotransformer may be connected to the middle of the horizontal leg of a delta loop or the middle of either horizontal leg of a square loop. The feed-point impedance of the loop antenna may be adjusted between about one hundred ohms and ten thousand ohms. The feed-point impedance is adjusted automatically to maximize signal gain. A neural network may be trained to set the feed-point impedance based on environmental conditions and observed periodicity, with a feedback loop based on actual gain or signal strength.