Hi,
My question relates to the f/D specification of a Ku offset lnb.
f/D is a relationship of a dish focal point and diameter. It is used to specify the 'look' angle of the lnb which matches that dish. It is most typically used to specify prime focus dish
installations.
C-band prime focus f/D's are typically in the range of 0.3 - 0.4. The look angle of the matching C-band lnb is approcimately 90 degrees ie a perfectly circular 90 degree conical view.
f/D is also relevant to offset designs where the figure is in the 0.6 - 0.7 range. This means that the offset lnb now has a 'sharper' approximately 60 degree view.
Now for my question.
Does the offset Ku lnb also share a 'perfectely circular 60 degree conical view'?
I guess I could easily determine this by cutting the windows of a variety of offset ku lnb's to study the scalar rings, but I'm sure this has been done before.