Antenna with shaped reflector(s), reconfigurable in orbit
First Claim
1. An emitting and receiving antenna for a telecommunications satellite, said antenna comprising:
- at least one shaped reflector;
a primary radiating feed having a primary reception chain, said primary radiating feed configured to generate a fixed primary beam with a nominal footprint; and
an adjustment device configured to adjust the primary beam, wherein said adjustment device comprises;
a secondary radiating array comprising a number of elementary radiating feeds accommodated around the primary radiating feed,a beam-forming network connected to the elementary radiating feeds and configured to synthesize a secondary beam having a minimum energy value in a direction of a jammer and having a footprint which is superimposed, at least partially, upon the nominal footprint, anda coupling device distinct from the beam-forming network, the coupling device comprising;
a first input connected to the primary reception chain of the primary radiating feed,a second input connected to a reception chain of the secondary radiating array,a first filter having an input connected to the primary radiating feed,a second filter having an input connected on an output of the beam-forming network, anda dual multiplexer comprising two inputs connected to respective outputs of the first filter and the second filter, wherein the dual multiplexer is configured to multiplex 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.
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Accused Products
Abstract
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.
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Citations
7 Claims
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1. An emitting and receiving antenna for a telecommunications satellite, said antenna comprising:
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at least one shaped reflector; a primary radiating feed having a primary reception chain, said primary radiating feed configured to generate a fixed primary beam with a nominal footprint; and an adjustment device configured to adjust the primary beam, wherein said adjustment device comprises; a secondary radiating array comprising a number of elementary radiating feeds accommodated around the primary radiating feed, a beam-forming network connected to the elementary radiating feeds and configured to synthesize a secondary beam having a minimum energy value in a direction of a jammer and having a footprint which is superimposed, at least partially, upon the nominal footprint, and a coupling device distinct from the beam-forming network, the coupling device comprising; a first input connected to the primary reception chain of the primary radiating feed, a second input connected to a reception chain of the secondary radiating array, a first filter having an input connected to the primary radiating feed, a second filter having an input connected on an output of the beam-forming network, and a dual multiplexer comprising two inputs connected to respective outputs of the first filter and the second filter, wherein the dual multiplexer is configured to multiplex 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification