Huh? Your claim back in post #732 was that multi-frequency dish antenna designs depend on the band wavelengths being sufficiently diverse. Well not so, as in addition to the example I posted there's even a better case here of the dish 500/1000+ with two bands right beside and thus very close to one another, yet the LNB can still sufficiently separate them. The 12.2-12.7 GHz Ku BSS band is then directed to a receive circuit with a 11.250 GHz L.O. (14.350 GHz L.O. for the DPP upper block). And the 11.7-12.2 GHz Ku FSS band to a receive circuit with a 10.750 GHz L.O. (13.850 GHz L.O. for the DPP upper block). So what's your point now?