Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1974-05-09
1976-05-25
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 68R, G01S 956
Patent
active
039597920
ABSTRACT:
A device for the facilitation and simplification of the adjustment of resonators of an answering device coupled to a high frequency line, for a microwave transmission system for railroad vehicles or information assigned to certain points with several digits employs a separate frequency range with frequencies provided for the characterization of an alphanumeric symbol and periodic switching through the transmission frequency band which transmits an interrogation signal from an interrogation device and receives selectively frequency modulated signals by the resonators of the answering device. Successive frequency ranges of the transmission frequency band are assigned in a sequence differing from the digit sequence of the information to be transmitted. The resonators are optimally coupled with respect to oscillations to the electromagnetic field of the high frequency line and the interrogation device includes, in a receiving branch thereof, a digit sorter which arranges the signals created by the resonators into respective digit stores which are arranged according to the digit sequence.
REFERENCES:
patent: 3353178 (1967-11-01), Wasterlid
patent: 3399405 (1968-08-01), Daniel
patent: 3406391 (1968-10-01), Le Von
patent: 3521280 (1970-07-01), Janco et al.
patent: 3878528 (1975-04-01), Majeau
Siemens Aktiengesellschaft
Tubbesing T. H.
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