The main character is a young scientist who creates such devices and discovers the existence of other worlds. The plot of the book 'Антеннофидерные устройства' revolves around the main character, a young scientist named Alex, who has always been fascinated by the mysteries of the universe. He spends countless hours studying and experimenting with various technologies in his quest for knowledge. One day, he stumbles upon an incredible breakthrough - the creation of a new type of antennae device that can capture and transmit information from other worlds. As Alex delves deeper into his research, he realizes the immense potential of his discovery and the possibility of unlocking secrets of the universe that have long been hidden from humanity. He becomes obsessed with perfecting his invention and soon finds himself on the brink of a groundbreaking discovery that could change the course of history. However, as he continues to study and develop his technology, he begins to realize the dangers of playing with forces beyond human control. The story takes a dramatic turn when Alex discovers that his invention has attracted unwanted attention from powerful forces who seek to use it for their own gain.

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