The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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Metal 3D-printed radio-frequency (RF) filter, manufactured and tested for flight by Airbus Defence and Space. RF waveguide filters are key technologies for space communications, dating back to the earliest days of the Space Age. The sky is crammed with radio signals but these filters serve as gatekeepers to screen out unwanted frequencies while allowing selected channels to pass through. A typical modern telecommunication satellite might carry hundreds of these filters.