Any satellite communications system network operator using a Ku-Band system (12/14 GHz or higher frequencies) will face the effects of rain fade at some time. But to understand why this weakening occurs with Ku-Band transmissions, you must first understand the causes of satellite rain fade. Two of the most common causes are listed below.
Scattering can be caused by either refraction or diffraction:
It refers primarily to the absorption of a microwave Radio Frequency (RF) signal by atmospheric rain, snow or ice, and losses are especially prevalent at frequencies above 11 GHz. It also refers to the degradation of a signal caused by the electromagnetic interference of the leading edge of a storm front. Rain attenuation or fade can be caused by precipitation at the uplink or downlink location. However, it does not need to be raining at a location for it to be affected by rain fade, as the signal may pass through precipitation many miles away, especially if the satellite dish has a low look angle.
From 5 to 20 percent of rain fade or satellite signal attenuation may also be caused by rain, snow or ice on the uplink or downlink antenna reflector, radome or feed horn.
attenuation due to atmospheric conditions.
The first communication satellite was Echo NASA
The satellite transponder typically works in either the C-band (4-8GHz) or the Ku-band (12-18GHz) and these are for the downlink (from the satellite to the earth station).
It has to do with data communication. It is called the Shannon channel capacity theory where double the bandwidth equals double the highest data rate. This is of course theoretically and does not take into account white noise (thermal noise), impulse noise, attenuation distortion or delay distortion.
In cellphones, communications takes place via radio waves to a satellite, or via an underground cable network.
satellite is satellite
attenuation due to atmospheric conditions.
The first communication satellite was Echo NASA
definition of optical satellite communication
The problems are attenuation of signals due to certain atmospheric condition . Depending on the elevation, the signal has to penetrate a small ar larger percentage of the atmosphere. generally an elevation less than 10 degrees is considered useless for communication.
Why Fresnel zone affecting satellite and ground communication?
Attenuation is a measure of how much loss a signal experiences when it travels down a communication medium( loss as heat, absorbed by communication medium).It is mesured in decibels Attenuation is a term that refers to any reduction in the strength of a signal, when transmitting over a long dinstance. Attenuation occurs with any type of signal, whether digital or analog. It is also called loss of signals, The extent of attenuation is usually expressed in units called decibels (dBs).
Com = Communication, Sat = Satellite
land satellite sea satellite communication satellite weather satellite and spy satellite
it means loss of signal as distance increase July
Yes, it is.
radar communication isfaster and has less attenuation(loss of signals).it is wireless so more preferred over other modes of communication