Project Cyclops, A Design... - Department of Earth and Planetary ...

H-2baccomplishes this. The maximum loss in this case is
1 dB, and the average, or expected value is 0.39 dB. With
vertical and horizontal polarizations supplied as inputs,
the outputs are as shown in the first right-hand column.
If, on the other hand, the inputs are right and left
circular polarization, as shown in parentheses, the
outputs will be the polarizations shown in parentheses in
the last column on the right. Regardless of which pair of
orthogonal inputs is supplied, the outputs will always
correspond to six polarizations equally spaced around
the Poincard
sphere.
Leakage signals will probably have random polarizations
and will be detected with an average loss of 0.39
dB if all six outputs are processed. Beacons, for the
reasons given in Chapter 6, are expected to be circularly
polarized. The Cyclops proposal is to search both
circular polarizations simultaneously while looking for
beacons. By using the same data processing system on
the outputs of the polarization converter of Figure H-2b
taken in pairs, all polarizations provided can be searched
in three times the nominal search time.
REFERENCE
1, Kraus, J,D., Radio Astronomy. McGraw-Hill, New
York, 1966.
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