Abstract: A satellite-based very-high-throughput system is provided and a web-caching system based on a high-altitude platform station, an aerostat for example, having the advantage of decreasing the throughput required over the feeder link without however requiring a cache server to be installed on board the satellite.

Abstract: A satellite-based very-high-throughput system is provided and a web-caching system based on a high-altitude platform station, an aerostat for example, having the advantage of decreasing the throughput required over the feeder link without however requiring a cache server to be installed on board the satellite.

Abstract: A device for measuring a multipactor effect in microwave systems includes a first coupler, a vacuum enclosure where a sample under test is enclosed, and a second coupler, all in series between an input which receives incident power and an output which delivers output power. The device also includes a mixer operated as a phase detector having a first input connected to an output of the first coupler to sample part of the input power via a first attenuator and a phase-shifter and a second input connected to an output of the second coupler to sample a part of the output power via a second attenuator. The output of the mixer is connected to a noise measuring device.