Abstract: A multiport microwave device for passively steering an antenna includes a substrate, a plurality of array ports on a first side of the substrate, where the array ports are configured for connection to one or more radiating elements, a plurality of beam ports on a second side of the substrate opposite the first side, where the beam ports are configured to transmit a signal received by at least one of the plurality of array ports, and a lens structure on the substrate disposed between the plurality of array ports and the plurality of beam ports, the lens structure configured to provide a phase shift for the signal between the array ports and the beam ports. In the multiport microwave device, the substrate may be rolled about an axis into a final shape having a predetermined radius of curvature in which portions of the multiport microwave device overlap one another.