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In this work, the authors present a suitability analysis of an Extended-Interaction Klystron (EIK) and a Traveling Wave Tube (TWT) to meet the requirements of the Wind-Scatterometer instrument, that will be part of the MetOp Second Generation (MetOp-SG) meteorological mission. Trade-off analyses are presented, common considerations to both technologies are provided and a preliminary analysis on the...
Multibeam satellite systems are typically designed assuming a uniform traffic demand, while, in reality, the uncertainty of the actual traffic creates load imbalances among different beams. In this case, the global capacity balance yields to a paradox: the system is not able to meet the demand while some of the available capacity is left unused. Multibeam systems can mitigate this effect by embarking...
Multibeam satellite systems are typically designed assuming a uniform traffic demand. However, in reality, the uncertainty of real traffic (i.e. non-spatially-uniform) creates load imbalances among different beams so that some beams work at their maximum, but are still not able to fully meet the traffic demand (overloaded), while others beams use only a fraction of their potential capacity (underloaded)...
In order to support the deployment of satellite broadband services able to satisfy the growing need for broadcast interactive applications, future broadband telecommunication satellites will have to exploit frequencies beyond Ka-band. This entails new key challenges and the use of critical techniques and technologies, which will be discussed.
This paper presents a preliminary system analysis carried out in order to understand, from a system perspective, which technologies, communication techniques and resources will be required to achieve the challenging goal of developing a Terabit/s satellite system in the 2020 time horizon.
This paper presents Monte Carlo simulations carried out by means of an ESA in-house simulator developed in Matlab environment. The objective of the simulations is to analyze how the MPA performance, in particular in terms of isolation at the MPA output ports, is affected by the amplitude and phase tracking errors of the high power amplifiers within the MPA. Different approaches are considered and...
The radio-frequency payload of future navigation satellite systems will require increased output power with the possibility to use TWTAs instead of the more conventional SSPAs. While offering higher efficiency and power capability, TWTA nonlinearity might affect the signal quality and the level of out-of-band emissions. A methodology is presented in order to trade-off some of the key aspects in the...
In this paper, simulation results of typical isolation performance of an 8×8 MPA are presented. By means of Monte Carlo simulations, the statistical behavior of the MPA isolation has been evaluated for different amplitude and phase tracking errors of the High Power Amplifiers.
The paper describes possible key challenges and critical techniques and technologies for broadband satellite communications which in the authors' opinion show enough potential to justify their development in the coming years.
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