Ku band downlink frequency tv#

This very-small-aperture-terminal (VSAT) communication uses data rates up to 4 Mbps. A smaller market is the two-way communication pipe for applications like credit card data, internet in remote areas, maritime communication, and private networks (e.g. This is a mainly one-way communication pipe with the satellite.

Ku band downlink frequency tv#

The majority of the outdoor units are for satellite TV reception in the Ku-band. The microwave satellite market is a mass market with over 80 million outdoor units in 2012. Gabriele Manganaro, Domine Leenaerts, in Advances in Analog and RF IC Design for Wireless Communication Systems, 2013 1.2 The satellite infrastructure This is accomplished by including an appropriate carrier to interference ratio component in the calculation of the link budgets applicable to the system under study. However, under heavy rain conditions this discrimination can drop to as little as 15 dB, and this must be accounted for in calculating the link availability. Antenna systems, using modern feed technology, are able to discriminate between these polarizations to the extent that the unwanted polarization is attenuated by 30 dB or more relative to the wanted polarization under clear sky conditions. Most satellite systems in service today use two senses of polarization-either horizontal and vertical or right- and left-hand circular-to achieve frequency reuse of the assigned frequency spectrum. Thus, in calculating link budgets it is necessary to take into account both the path loss and the noise temperature increase on the down-link but only the path loss on the up-link.Īnother form of atmospheric impairment that must be accounted for is that due to depolarization. The noise temperature increase is not apparent on the up-link because the satellite is looking at the earth, which is of course always at an ambient temperature of 290 K. For a typical clear sky system noise temperature of 200 K, the rain system noise temperature is 417.5 K.

Thus, for example, if the attenuation due to rain is 6 dB, the value of a is 4 and the resulting system noise temperature becomes 3 T O/4 + T SO.