A transmitter (300; 400) for a dual-frequency satellite-to-earth downlink, the transmitter (300; 400) comprising: a plurality of modulators (310; 410) comprising a first modulator (310a, 410a) and a second modulator (310b, 410b), wherein the first modulator (310a, 410a) is configured to modulate first input data onto a first signal in a first frequency band and onto a first signal in a second frequency band, wherein the second modulator (310b,410b) is configured to modulate second input data onto a second signal in the first frequency band and onto a second signal in the second frequency band; a first plurality of amplifiers (330; 430) comprising a first amplifier (330a, 430a) and a second amplifier (330b, 430b, 430c), wherein the first amplifier (330a, 430a) is configured to amplify the first signal in the first frequency band and the second amplifier (330b, 430b, 430c) is configured to amplify the second signal in the first frequency band to at least a first predetermined signal strength; a second plurality of amplifiers (320; 420) comprising a first amplifier (320a, 420a) and a second amplifier (320b, 320c, 420b, 420c), wherein the first amplifier (320a, 420a) of the plurality of second amplifiers is configured to amplify the first signal in the second frequency band and the second amplifier (320b, 320c, 420b, 420c) of the plurality of second amplifiers is configured to amplify the second signal in the second frequency band to at least a second predetermined signal strength; and wherein a number of the plurality of modulators (310; 410) is smaller than a sum of a number of the first plurality of amplifiers (330; 430) and the second plurality of amplifiers (320; 420). a plurality of modulators (310; 410) comprising a first modulator (310a, 410a) and a second modulator (310b, 410b), wherein the first modulator (310a, 410a) is configured to modulate first input data onto a first signal in a first frequency band and onto a first signal in a second frequency band, wherein the second modulator (310b,410b) is configured to modulate second input data onto a second signal in the first frequency band and onto a second signal in the second frequency band; a first plurality of amplifiers (330; 430) comprising a first amplifier (330a, 430a) and a second amplifier (330b, 430b, 430c), wherein the first amplifier (330a, 430a) is configured to amplify the first signal in the first frequency band and the second amplifier (330b, 430b, 430c) is configured to amplify the second signal in the first frequency band to at least a first predetermined signal strength; a second plurality of amplifiers (320; 420) comprising a first amplifier (320a, 420a) and a second amplifier (320b, 320c, 420b, 420c), wherein the first amplifier (320a, 420a) of the plurality of second amplifiers is configured to amplify the first signal in the second frequency band and the second amplifier (320b, 320c, 420b, 420c) of the plurality of second amplifiers is configured to amplify the second signal in the second frequency band to at least a second predetermined signal strength; and wherein a number of the plurality of modulators (310; 410) is smaller than a sum of a number of the first plurality of amplifiers (330; 430) and the second plurality of amplifiers (320; 420).