Recognition tag for use in a system for identifying distant items
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 31, 1998
Grant Date -
N/A
app pub date -
Nov 28, 1994
filing date -
Nov 28, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Passive recognition tags are disclosed that function along with a transceiver and a processor in a system which identifies distant items. Each tag includes a SAW substrate on which sync and tap transducers are commonly connected between positive and negative buses across which an interrogating signal is applied through an antenna. In response to that signal, in phase identification code signals pass to the antenna from both the sync transducer and the tap transducers. Transducer spacing is minimized relative to acoustic reflection considerations by disposing the tap transducers in a plurality of channels which are aligned in parallel across the width of the substrate on both output sides of the sync transducer.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully