An active array antenna at X-band for spaceborne SAR applications: system design tradeoffs

Active phased-array antennas will play an essential role in the development of spaceborne SAR instruments of second generation. The authors describe the development and breadboarding of an active phased array at X-band for future SAR missions (e.g. EOS-X, SIR-D). System trade-offs are shown to be needed in order to optimize the antenna electromagnetic performances, taking into account feasibility and technology constraints. Special emphasis is given to the development of strategic components, such as monolithic microwave integrated circuits (MMICs)