Device for wireless data transmission

Details Device for wireless data transmission Device for wireless data transmission

1981-11-20

1984-12-11

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343713, 343728, G01S 1378

Patent

active

044881533

ABSTRACT:
Active interrogation devices which can be moved in a track direction relative to passive response devices transmit electrical energy to the response devices with the aid of ferrite rod antennae which are each arranged in the track direction and are contained in each interrogation device and each response device. In the response devices, this energy feeds a transmitting device by which an item of data assigned to a response device can be transmitted in the form of an electrical response signal to a frame antenna of each interrogation device and each response device to the interrogation device. The antenna arrangements can therefore be designed to be relatively narrow in the track direction without the signal for the data transmission exhibiting phase jumps.

REFERENCES:
patent: 3290675 (1966-12-01), Neild
patent: 3351938 (1967-11-01), Gray
patent: 4288689 (1981-09-01), Lemelson et al.
Anon; Aid for Drivers; Wireless World, vol. 81, No. 1474, pp. 269-270, Jun. 1975.
Beyersdorff R., "Automatic Reading of Rolling Stock Identification Numbers", Siemens Review, vol. 31 (1964) No. 5, pp. 147-153.

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