Radiofrequency or semi-finished communication module suitable for being incorporated within the structure of a tyre, including a radiofrequency transponder embedded in an elastomer mixture and including an electronic chip and a radiating antenna suitable for communicating with a radiofrequency reader, wherein the radiofrequency transponder further includes a primary antenna electrically connectedto the electronic chip, wherein the primary antenna is electromagnetically coupled to the radiating antenna, wherein the radiating antenna consists of a single-strand helical spring, and wherein the radiating antenna has a steel core coated with a conduction layer.