Electronic identification system

Details Electronic identification system Electronic identification system

1979-02-01

1980-12-30

Yusko, Donald J.

Communications: electrical

Digital comparator systems

343 65SS, 340568, H04Q 900, G01S 956

Patent

active

042426634

ABSTRACT:
An electronic identification system includes common transceiver and signal processing apparatus, and relative small electronic circuitry, referred to as a "tag", secured to each item of a population to be identified. Each tag is assigned a multi-bit digital code which may or may not be unique.
The common equipment determines whether any desired tag-bearing item is nearby by emitting a phase modulated radio frequency wave embodying the requisite tag code, and examining the output of a homodyne mixer, operating on a radar-like recovered reflection signal, for a predetermined signatory response. Such a response will be generated only by a tag circuit responding to a match between its stored encoding and that of the interrogation signal by changing the effective cross sectional reflecting area of the tag antenna.

REFERENCES:
patent: 3754250 (1973-08-01), Bruner
patent: 3914762 (1975-10-01), Klensch
patent: 3967202 (1976-06-01), Batz
patent: 3984835 (1976-10-01), Kaplan et al.
patent: 4001822 (1977-01-01), Sterzer

Affiliated with

Also associated with

Rating

Electronic identification system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic identification system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic identification system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-9803