Abstract: Embodiments of the present disclosure relate generally to testing one or more signal paths. For example, a signal path may include a phase shifter that may impart a phase shift to signals passing through the signal path. Some embodiments may test a phase shift imparted to a signal by the signal path, including the phase shifter. Some embodiments may test the phase shift by comparing the phase of a signal at an input of the signal path with the phase of a signal at the output of the signal path. Some embodiments may test the phase shift by providing a signal at inputs of two phase paths and comparing the phases of signals at the outputs of the signal paths. Some embodiments may further adjust a phase shifter responsive to the test. Related devices, systems and methods are also disclosed.

Abstract: A phased array antenna tile which is steered by microelectromechanical system (MEMS) switched time delay units (TDUs) in an array architecture which reduces the number of amplifiers and circulators needed for implementing an active aperture electronically scanned array antenna so as to minimize DC power consumption, cost and mass of the system, making it particularly adaptable for airborne and spaceborne radar applications.