Lock having an interrogation antenna and method of construction

摘要

A key lock (10) having an interrogation antenna (12) is provided. The key lock (10) includes a lock mechanism (14) and an interrogation antenna (12). The interrogation antenna (12) comprises an antenna winding disposed around the lock mechanism (14). The antenna winding has a folded dipole shape forming a first side (20) and a second side (22) such that the first side (20) is field reversed with respect to the second side (22). <IMAGE>