Antenna unit for communication system for movable body

Details Antenna unit for communication system for movable body Antenna unit for communication system for movable body

1997-08-26

1999-11-09

Vo, Nguyen

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

455562, 455 33, H04B 502

Patent

active

059830760

ABSTRACT:
An antenna unit for a communication system is disclosed. The communication system includes a rail, a separable power transmission line provided along the rail, carriages running along the rail while receiving power from the power transmission line, and a fixed station for establishing communications with the carriages. Communications between the carriages and the fixed station are accomplished by transmitting a signal via the power transmission line. The antenna unit is detachably located in the path of the power transmission line. The antenna unit includes an antenna device serving as a communication antenna of the fixed station and a conductive line to which the antenna device is attached. A terminal connects each end of the conductive line to an associated separate part of the power transmission line so that the conductive line is located between the separate parts of the power transmission line, thus forming a combined power/signal transmission line. Another terminal connects the antenna device to a signal line connected to the fixed station. The antenna unit permits easy installation of an antenna without having to perform difficult winding and other steps in the field.

REFERENCES:
patent: 4507646 (1985-03-01), Hamlin et al.
patent: 5712614 (1998-01-01), Patel et al.
patent: 5892795 (1999-04-01), Paret

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