By principle the helix antenna will blank out a certain amount of signal as it is mechanically located in front of the receiving element. A geometrical analysis illustrates why and gives a good indication of the attenuation order of magnitude.Assume an opening angle of the LNB of 50 deg. The helix shade from the LNB…
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UPDATE: IceConeFeed v2.1
After many inquiries from the HAM community for updating the IceConeFeed design parameters a new version will be released soon. Key features are optimized helix dimensions to achieve a lower SWR and also reduce the LNB shadow in order to increase reception gain. See below the comparison between the 3.5 turn helix of IceConeFeed v2…