A high-directivity transponder using self-steering arrays

A high-directivity transponder system based on self-steering arrays is introduced. The system consists of retrodirective and self-null-steering arrays. When interrogated, the retrodirective array steers a beam containing data toward the interrogator, while the null-steering array points a null toward the interrogator and a jamming signal in all other directions. The system effectively provides super-high directivity, disabling interception.