Dieter DC6EH from Kempen conducted a direct performance comparison of the IceConeFeed v2.0 vs v2.1. A continuous 1750Hz tone in USB was sent on 10498.960 MHz. He used the WebSDR http://websdr.is0grb.it:8901 for SNR measurements. Station setup was a 85cm Fuba sat dish. As shown by the spectrum below v2.1 features almost the same transmission performance…
Tag: Antenna measurement
IceConeFeed v2.1 bei DATV
Dieter DC6EH aus Kempen berichtet über den Einsatz vom IceConeFeed v2.1 bei DATV: “Die ersten Empfangsversuche sind sehr positiv verlaufen. Nachdem ich die Ice Cone V2 gegen die neue V2.1 getauscht habe, gab es auf DATV eine Verbesserung um +0,8 dB – 0,7 dB. Meine Bedingungen waren der Empfang der DATV-Bake ohne weitere Sendesignale auf…
UPDATE: IceConeFeed v2.1
After many inquiries from the HAM community for updating the IceConeFeed design parameters a new version is now available (purchase here). 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…
3D Patch Update
The 3D printable patch feed for #QO100 is in the making. A design change from the rectanglar to elliptic has been found to be more efficient and achieving a better axial circular polarization. This is a prelimiary current simulation at 2.4Ghz. The direction of rotation will change from RH to LH.
LNB attenuation
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…
IceConeFeed Thermal Test — 120 W CW
A customer put the IceConeFeed under 120 W CW with a thermal camera. Peak temperature at the feedpoint: 31.6 °C — a ~20 K rise at the worst-case duty cycle.