IFF system cooperating with further position finding device

Details IFF system cooperating with further position finding device IFF system cooperating with further position finding device

1976-07-12

1992-07-14

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Iff or sif

342 54, G01S 1378, G01S 1386

Patent

active

051307138

ABSTRACT:
An IFF system comprises an interrogation device having an antenna arrangement operating in the HF or microwave range with a relatively broad radiation characteristic for radiation of coded interrogation pulses and for receiving answer signals. The IFF system cooperates with a position finding device whose transmission pulses are radiated by way of a relatively narrow radiation lobe and wherein the answer signals are triggered in the answering device in response to the arrival of transmission pulses of the position finding device. A pulse laser operating in the optical range and having a very narrow radiation lobe at the transmission radiator is used as the position finding device and an answer signal is only triggered in the answering device with the aid of a control circuit when the transmission pulse of the laser transmitter arrives in a certain section during the interrogation pulse produced by the interrogation transmitter, the duration of the interrogation pulses being essentially greater than the duration of the transmission pulses.

REFERENCES:
patent: 3754249 (1973-08-01), Kearney, II
patent: 3997897 (1976-12-01), Brunner et al.
patent: 4851849 (1989-07-01), Albersdoerfer

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