| 摘要 |
An adcock DF-on-the-fly type direction finding system employing a beam forming dispersive delay line (BFDDL). A square array of four elements A1, B1, C1, and D1 with A1, C1 and B1, D1 being the diagonal pairs is used to input signals to combiner, shifter and summer elements to produce signals representing S phi =A1+B1+C1+D1 and S=(B1-D1)+[(A1-C1) shifted -90 DEG ]. S phi and S are input to the BFDDL which produces output signals sampled from the output spatial interference pattern of the BFDDL at 90 DEG intervals. The output signals from the BFDDL are used to calculate the arrival of the signal of interest as being substantially equal to the phase shift between S phi and S.
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