Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Unique identity
Patent
1983-06-30
1988-02-16
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Unique identity
356 5, 455604, 342107, G01S 1380, G01S 1382, H04B 900
Patent
active
047258411
ABSTRACT:
A "passive interrogator label system" (PILS) comprises an interrogator for transmitting an interrogation signal, one or more "labels" or passive transponders which produce a reply signal containing coded information in response to the interrogation signal, and a receiver and decoder for receiving the reply signal and decoding the information contained in it. The frequency of the interrogation signal assumes a plurality of frequency values within a prescribed frequency range. The decoder includes a mixer (4 quadrant multiplexer) for mixing together the interrogation and reply signals (or signals derived therefrom) to produce a further signal containing frequencies which are the sum and difference of the interrogation and reply signals. A signal processor, responsive to this further signal produced by the mixer, detects at least some of the frequencies contained in this further signal and determines the informational code associted with the transponder.
REFERENCES:
patent: 3273146 (1966-09-01), Hurowitz
patent: 3521280 (1970-07-01), Janco et al.
patent: 3631484 (1971-12-01), Avgenblick
patent: 3706094 (1972-12-01), Cole et al.
patent: 3737911 (1973-06-01), Sakuragi et al.
patent: 3755803 (1973-08-01), Cole et al.
patent: 3981011 (1976-09-01), Bell, III
patent: 4023167 (1977-05-01), Wahlstrom
patent: 4058217 (1977-11-01), Vaughan et al.
patent: 4059831 (1977-11-01), Epstein
patent: 4069472 (1978-01-01), Karata et al.
patent: 4151525 (1979-04-01), Strauch et al.
patent: 4217564 (1980-08-01), Autran
patent: 4263595 (1981-04-01), Vogel
patent: 4339753 (1982-07-01), Mawhinney
patent: 4388524 (1983-06-01), Walton
patent: 4620191 (1986-10-01), Skeie
patent: 4623890 (1986-11-01), Nysen
patent: 4625207 (1982-11-01), Skeie
Davies et al., "Passive Coded Transponder Using an Acostic-Surface-Wave Delay Line", Apr. 1975, Electronic Letters, vol. 11, No. 8, pp. 163-164.
Armstrong Donald
Nysen Paul A.
Skeie Halvor
Barron Jr. Gilberto
Milde Jr. Karl F.
Tubbesing T. H.
X-Cyte Inc.
LandOfFree
System for interrogating a passive transponder carrying phase-en 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 for interrogating a passive transponder carrying phase-en, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for interrogating a passive transponder carrying phase-en will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2223188