ANTENNA WITH SHAPED REFLECTOR(S), RECONFIGURABLE IN ORBIT

摘要

The antenna is provided with at least one shaped reflector and a primary radiating feed arranged in front of a reflector, which is capable of generating a primary beam with a footprint covering a nominal coverage zone. The antenna is also provided with an adjustment device for the primary beam of the primary radiating feed, whereby said adjustment device incorporates a secondary radiating array comprised of a number of elementary radiating feeds arranged around the primary radiating feed, a beam-forming network connected to the elementary radiating feeds which is capable of synthesizing a secondary beam covering a secondary coverage zone and having a footprint which is superimposed, at least partially, upon the footprint, and a coupling device connected to the primary reception chain of the primary radiating feed and the reception chain derived from the secondary radiating array.

主权项

1. An emitting and receiving antenna for a telecommunications satellite, said antenna comprising at least one shaped reflector and a primary radiating feed including a primary reception chain, said primary radiating feed being capable of generating a primary beam with a nominal footprint, said antenna further comprising an adjustment device for adjusting the primary beam, wherein said adjustment device incorporates a secondary radiating array composed of a number of elementary radiating feeds accommodated around the primary radiating feed, a beam-forming network connected to the elementary radiating feeds which is able to synthesize a secondary beam having a footprint which is superimposed, at least partially, upon the nominal footprint, and a coupling device connected to the primary reception chain of the primary radiating feed and to a reception chain of the secondary radiating array, said coupling device comprising at least a first filter connected to the primary radiating feed, at least a second filter connected on the output of the beam-forming network, and a dual multiplexer comprising two inputs which are connected respectively to respective outputs of the first filter and the second filter, wherein the dual multiplexer is capable of multiplexing reception frequency bands of the primary radiating feed and the secondary radiating array in order to reconstitute a complete and non-jammed reception frequency band.