Antenna Diameters

The diameter of an antenna to be used for watching TV broadcasts varies according to regions. Radiation powers of Türksat satellites varying according to regions can be found on the coverage range maps in our web site. The approximate antenna diameters required according to these radiation powers are given in the following table. The significant factors in determining antenna diameter are listed below:

• Since the signal quality would rise as the Noise Figure of LNB gets lower, this parameter affects the antenna diameter. The antenna diameters required for LNB's NF intervals of 0.6-0.7 dB and 0.8-1.0 dB are given separately. 
• The precipitation regime of the region is a very important factor in determining the antenna diameter. Rain weakens significantly the microwave signals used in satellite communication. For getting a lower impact of rain within extremely wet regions, antenna diameters corresponding to 3 dB or a weaker EIRP level can be preferred. Some instantaneous interruptions may be experienced during very heavy rain even with large antennas.
• Poor-quality, worn, divided and multiplexed, or very long cables would expose an attenuation impact, so these factors must be taken into consideration while determining the antenna diameter. For cables longer than 20-30 m or of poor quality, an antenna diameter corresponding to an EIRP level 1-3 dB lower than the EIRP level of the region compared to cable distance.