Next: 5.3.1 Fringe rate method
Up: 5. LO System and
Previous: 5.2.2 Double side band
The side band separation by mixer rejection is difficult for low IF
frequencies, and currently works only at 3mm. The image rejection
varies with frequency.
There are other methods that cancel the signal in the unwanted side
band by a larger factor. They are based on the fact that the LO1
phase
appears with a different sign on the USB and LSB
signals.
S.Guilloteau
2000-01-19