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1. (WO2001035120) ALL DIGITAL APPARATUS FOR BEARING MEASUREMENT OF ELECTROMAGNETIC SOURCES

Pub. No.:    WO/2001/035120    International Application No.:    PCT/IL2000/000724
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Tue Nov 07 00:59:59 CET 2000
IPC: G01S 3/04
G01S 3/48
Applicants: STATE OF ISRAEL - MINISTRY OF DEFENSE
SHMUEL, Amir
Inventors: SHMUEL, Amir
Title: ALL DIGITAL APPARATUS FOR BEARING MEASUREMENT OF ELECTROMAGNETIC SOURCES
Abstract:
A device and method for determining the bearing of an incoming RF signal. The signal is received using a plurality of primary antenna elements (5). Each antenna element feeds into a respective receiving channel (6) that downconverts the received RF signal to IF, preferably by mixing with a local oscillator signal. The local oscillator signal may be produced by diverting and combining portions of the received RF signals, by receiving the incoming RF signal using one or more auxiliary antennas (11), or by a tunable oscillator. Preferably, the local oscillator signal is conditioned and filtered before mixing. The IF signals are processed, either by analog or digital means, to infer the bearing of the incoming RF signal.