Radiated Spectrum of Focal Plane Array Antennas with LINCA Array Feeds

In this contribution, radiation pattern measure-ments of a focal plane array antenna are combined with simulated outphasing waveforms to investigate the radiated spectrum. The recombination of the outphasing signals takes place in free-space (LINCA). The dynamic range is calculated and it is discussed whether the spectral masks would be violated with this system. A dynamic range of 24.1dB can be achieved, but the radiated out-of-band spectral components are not mitigated by the directive nature of the reflector.