System and method for reading multiple RF-ID transponders

Details System and method for reading multiple RF-ID transponders System and method for reading multiple RF-ID transponders

1994-06-24

1996-03-19

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

342 44, 342 51, G01S 1375

Patent

active

055006515

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.

REFERENCES:
patent: 3870994 (1975-03-01), McCormick et al.
patent: 3882497 (1975-05-01), Klass et al.
patent: 3936823 (1976-02-01), Weber
patent: 3969616 (1976-07-01), Mimken
patent: 4124850 (1978-11-01), Frazier, Jr. et al.
patent: 4167007 (1979-09-01), McGeoch et al.
patent: 4229737 (1980-10-01), Heldwein et al.
patent: 4633251 (1986-12-01), McGeoch et al.
patent: 5053774 (1991-10-01), Schuermann et al.
patent: 5339073 (1994-08-01), Dodd et al.
patent: 5367303 (1994-11-01), Waltz

Affiliated with

Also associated with

Rating

System and method for reading multiple RF-ID transponders does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for reading multiple RF-ID transponders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for reading multiple RF-ID transponders will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1961073