Abstract: Expandable shelter systems and associated methods are described herein. In one aspect, an expandable shelter system can include a system container, where the container defines a container cavity when the system container is in a collapsed form; an expandable container section positioned within the defined cavity or forming the defined cavity when the system container is in the collapsed form, and including at least one of an expandable container front, an expandable container rear, an expandable container first side, an expandable container second side, an expandable container bottom, or an expandable container top; and an actuation system coupled to the system container and the expandable container section, where the actuation system is configured or adapted to reposition the expandable container section from the collapsed form to an expanded form, where a dimension of the cavity is greater in the expanded form compared to the collapsed form.

Abstract: A radar system operates at various different frequencies, and routes power among various antennas by use of a hybrid arrangement. The system is precalibrated at each possible operating frequency by adjusting the phase shifts associated with the hybrid in a feedback manner to provide optimal performance, and the calibration values are stored. During normal operation, the calibration values of phase shift are selected and used for feedforward operation at each frequency.

Abstract: A radar system operates at various different frequencies, and routes power among various antennas by use of a hybrid arrangement. The system is precalibrated at each possible operating frequency by adjusting the phase shifts associated with the hybrid in a feedback manner to provide optimal performance, and the calibration values are stored. During normal operation, the calibration values of phase shift are selected and used for feedforward operation at each frequency.