Short-range magnetic communication system

Details Short-range magnetic communication system Short-range magnetic communication system

1997-03-26

1998-06-23

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

455 111, 455 66, 455101, 455133, 455575, H04B 506

Patent

active

057714380

ABSTRACT:
A system and method communicate signals between a portable unit and a communications system. The portable device communicates with a base unit using inductive coupling. The base unit is further connected to a wider communication system such as a telephone network. Multiple, orthogonally arranged transducers are used in the base unit to provide a more complete magnetic field and to prevent mutual inductance nulls which are otherwise present in a magnetic field. The use of short-range inductive coupling minimizes the power requirements and limits interference with other sources. The inductive coupling may also be used to recharge a battery in the portable device.

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