Why is it not possible to provide transmit function by wideband amplifier and mixer circuits?(a) Heavy attenuation(b) High power output over wideband is not possible(c) Economically not profitable(d) Weight of the system increases five foldThis question was addressed to me in a national level competition.The origin of the question is Satellite Subsystems topic in division Satellite Communication of Avionics

Why is it not possible to provide transmit function by wideband amplif

1.	Why is it not possible to provide transmit function by wideband amplifier and mixer circuits?(a) Heavy attenuation(b) High power output over wideband is not possible(c) Economically not profitable(d) Weight of the system increases five foldThis question was addressed to me in a national level competition.The origin of the question is Satellite Subsystems topic in division Satellite Communication of Avionics
Answer» Right option is (b) High power OUTPUT over wideband is not POSSIBLE Explanation: it is generally not possible to generate very high output power over such wide bandwidth. The FACT is that no components and circuits can do this well. The high-power amplifiers in most transponders are traveling-wave tubes that inherently have limited bandwidth. They operate well over a small RANGE but cannot DEAL with the entire 500-MHz bandwidth allocated to a satellite.

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