Multi-directional RFID antenna

Details Multi-directional RFID antenna Multi-directional RFID antenna

1998-09-08

2000-05-30

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

3405728, 343867, 343742, G08B 1314

Patent

active

060695641

ABSTRACT:
A multi-directional RFID read/write antenna unit is described which provides multi-directional RF communication to a source, such as a RF tag. The antenna comprises a plurality of coils adapted to transmit multi-directional RF signals to a RF tag and receive RF response signals from the RF tag. The RF antenna includes a switch for selecting at least one of the RF antenna coils for transmission of the RF signals and receipt of the RF response signals whereby the RF signals can be directed toward and received from a plurality of different directions from a fixed position.

REFERENCES:
patent: 2399382 (1946-04-01), Polydoroff
patent: 3838409 (1974-09-01), Minasy et al.
patent: 4272083 (1981-06-01), Tomoeda
patent: 4654658 (1987-03-01), Walton
patent: 5258766 (1993-11-01), Murdoch
patent: 5621199 (1997-04-01), Calari et al.
patent: 5923300 (1999-07-01), Mejia

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