Interrogator and goods management system adopting the same

Details Interrogator and goods management system adopting the same Interrogator and goods management system adopting the same

2007-01-16

2007-01-16

Gregory, Bernarr E. (Department: 3662)

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

Radar transponder system

C342S043000, C342S044000, C342S051000, C342S175000, C342S195000, C343S790000

Reexamination Certificate

active

09942723

ABSTRACT:
An interrogator with an antenna that allows information exchanges with multiple transponders in a shorter distance of communication, by securing an intensified and uniform electromagnetic energy concentrated on areas near antenna elements. The interrogator is furnished with a sleeve antenna that includes a monopole conductor of ¼ wavelength (free space wavelength) continuously connected to a core wire of a coaxial cable on one end thereof, and a feed point on the other end, in which the sleeve antenna is grounded at the feed point. The interrogator has a plurality of the transponders arrayed near the antenna, and a plurality of the antennas selected by RF signal selectors. The interrogator antenna allows movable body identification such as in a goods management system for identifying multiply arrayed goods.

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