Patent · US Expired

Identification, friend or foe IFF installation

US4566009A · kind A · utility

20Cited by

7References

16Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Manfred Hanni · Munich, DE
Kurt Hechfellner · Taufkirchen, DE

Key dates

Filing date	Oct 14, 1980
Grant date	Jan 21, 1986
Priority date	—
Expiry date	Oct 14, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG01S13/78
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In an installation for identification friend or foe, coded interrogations and replies of an interrogation installation of the interrogating station and of a transponder of the interrogated station are transmitted in utilizing a radiotelephony installation. The transmission of the reply (identification) proceeds according to the frequency jumping procedure via the radiotelephony installation. The interrogation of the interrogating station consists of a known encoded code word and an encoded variable data part which contains (or comprises) a frequency address. The making available (or offering) of the transmit frequencies of the transponder proceeds by means of a frequency synthesizer controlled (or operated) by the frequency address. The reply is, in certain circumstances, repeated on several, successively transmitted frequencies.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.