Radio frequency automatic identification system

Details Radio frequency automatic identification system Radio frequency automatic identification system

1995-04-27

1999-04-06

Kunemund, Robert

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth from solid or gel state

Using heat

117 48, 117202, 117902, 117942, 342 42, 342 44, C30B 2918

Patent

active

058912401

ABSTRACT:
A radio frequency automatic identification system detects targets which include solid resonators resonating at several frequencies, attributing information to the frequencies at which the target resonates. Preferred resonators are quartz crystals, which may be made by a process of heating quartz to soften it and cutting crystals to approximate size and resonant frequency. Resonators produced by such a process are measured to determine their actual resonant frequency, and preferably the crystals are sorted into predetermined frequency windows in accordance with their measured resonant frequency. A set of resonators having frequencies corresponding to predetermined data is selected from the sorted groups of resonators and incorporated into a target. The preferred target is an ink-like material having a plurality of resonators disposed in a matrix which is radio frequency transparent at the frequency of interest. Targets are preferably detected by repetitively sweeping the frequency of the interrogating signal through a range which includes the information-bearing range of the system.

REFERENCES:
patent: 3363246 (1968-01-01), Gareis et al.
patent: 3607166 (1971-09-01), Loughridge et al.
patent: 3959792 (1976-05-01), Hildebrandt
patent: 4070672 (1978-01-01), Becker et al.
patent: 4732647 (1988-03-01), Aine
patent: 5204681 (1993-04-01), Greene
patent: 5291205 (1994-03-01), Greene
Hack's Chemical Dictionary, 4th ed. pp. 522 and 562.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1367593