Improve dish signal reception with a funnel

[Rizwan Awan]

@Kalpikos

If you want some testing, then, try to move your Lnb slightly far from dish with adding this thing

[ayanahmed]

@Kalpikos

Which type of dish you have ?

I made the test on an offset dish of 80cm.
I tried to improve the reception of the 10E, but the results disappointed me.

Dual reflector shaping

When the highest performance is required, a technique called "dual reflector shaping" may be used in Gregorian antennas. This involves changing the shape of the sub-reflector to direct more signal power to outer areas of the dish, to map the known pattern of the feed into a uniform illumination of the primary, to maximize the gain. However, this results in a secondary that is no longer precisely hyperbolic (though it is still very close), so the constant phase property is lost. This phase error, however, can be compensated for by slightly tweaking the shape of the primary mirror. The result is a higher gain, or gain/spillover ratio, at the cost of surfaces that are trickier to fabricate and test. Other dish illumination patterns can also be synthesized, such as patterns with high taper at the dish edge for ultra-low spillover sidelobes, and patterns with a central "hole" to reduce feed shadowing.

[attachment=0]Offset_Ofset_antenna.JPG[/attachment]

[ayanahmed]

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[baausandhu]

Very useful info dear.
I will also try this method.