Lee, LiTits, A.L.Recently, it was shown that the structured singular value framework can be extended to the case when information on the phase of the uncertainty is available, and a computable upper bound on the corresponding "phase sensitive structured singular value" was obtained. Here we show that the same bound can be obtained via an entirely different approach, using a family of linear fractional transformations. Extension to various uncertainty "shapes" follows.en-USlinear systemsrobust controlstabilitysystem theoryIntelligent ServomechanismsTechnical Report