A device and method for determining the bearing of an incoming RF signal.
The signal is received using a plurality of primary antenna element (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.
