Abstract: A system and method for communicating between an identification reader 12 and a transponder unit 10 is disclosed herein. A first interrogation signal is transmitted from the reader 12. This first interrogation signal having a first read range. A first response signal is then received at the reader 12 after which a second interrogation signal is transmitted from the reader 12. The second interrogation signal has a second read range which is different than said first read range. The read range can be varied by varying either the amplitude or duration of the power level of the interrogation signal. A second response signal is then received at the reader 12. These consecutive responses are then compared determine a correct response signal which can be displayed.

Abstract: A multi-interrogator transponder arrangement is disclosed. The transponder arrangement comprises a first interrogation unit (10) comprising a first wireless datacom transceiver (19) which transmits at least one RF interrogation signal. The arrangement also comprises a second interrogation unit (16) comprising a second wireless datacom transceiver which is in wireless communication with the first wireless datacom transceiver 19. The arrangement still further comprises a responder unit (12) which upon receipt of the RF interrogation signal transmits data stored therein back to the first interrogation unit 10 in the form of a responsive RF communication, the responder unit (12) comprising a responder unit energy accumulator (136) which stores energy contained in the RF interrogation signal. Other devices, systems and methods are also disclosed.

Abstract: An object of the invention is to provide a reader which can read transponders having different communication standard protocols with a minimum loss of demodulation speed performance and with the least amount of additional components.

Abstract: An extended range transponder/antenna configuration comprises a standard, state-of-the-art transponder which is coupled to a long and narrow antenna by a loosely coupled coil. The coupling of the coil to the transponder must be loose for a tuned type transponder in order to maintain the high "Q" and to avoid detuning and damping. Both effects of lowering the "Q" and detuning or damping the transponder would have an adverse effect on the receiving function of the transponder and the reading range of the transponder. The RF-ID efficiency of the arrangement is generally optimized for this type of application by the long but narrow antenna solution and by the simple fact that coupling an antenna to a transponder, amplifies the emission of the transponders signal relative to the noise, thus improving the signal-to-noise ratio of the RF-ID system.

Abstract: A semiconductor device package assembly including a semiconductor chip (10) which contains an electronic circuit and is mounted on a support plate (12) of electrically conductive material. Disposed substantially in the plane of the support plate (12) are conductor strips (18) which extend in the direction towards the support plate (12) and at their ends remote from the support plate (12) are formed as terminal conductors (22) for establishing connections to external electronic circuits. Selected conductor strips (18) are connected to selected points of the electronic circuit in the chip (10). A housing is provided which encloses the support plate (12), the semiconductor chip (10) and the conductor strips (18) and out of which the terminal conductors (22) project. At least one of said terminal conductors (22) serves for the application of ground.