Transponders for the detection and identification of remote cooperative targets

Most efficient for remote cooperative targets telesystems are radio frequency localization (RFLO) and RF identification (RFID) methods. Passive RFLO systems are analyzed and their optimal operation range is computed. For operation ranges exceeding 1 km RFLO systems using active transponders are still mandatory. A novel RFID system development is described and its 100 m range operation is enhanced by using a small battery in the transponder. New methods for improving RFLO and RFID operation range, efficiency and reliability are presented.<>