G - Physics – 01 – S
Patent
G - Physics
01
S
343/107, 343/112
G01S 3/38 (2006.01) G01S 3/14 (2006.01) G01S 3/46 (2006.01) G01S 3/48 (2006.01)
Patent
CA 1159933
ABSTRACT OF THE DISCLOSURE A novel Direction Finding system is described, using a small aperture circular array of vertical dipoles, the outputs of which are rotated in phase by angles corresponding to their angular location on the array circle. A phased ring combiner is used to add the dipole pair outputs, giving two resultant waveforms, one advanced in phase and the other retarded by the same angle .THETA. where .THETA. is the relative bearing angle of the incoming signal. The phasing elements are made independent of the signal frequency either by the use of all-pass networks or by prior conversion to a fixed intermediate frequency. DF processing can be performed by a digital phase meter which computes the phase difference between the two resultant waveforms. In addition, an orthogonal DF display is available through a .SIGMA./.DELTA. conversion.
335462
Bayly Engineering Limited
Fetherstonhaugh & Co.
LandOfFree
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