Abstract: A combined environmental and electromagnetic rotary seal. The invention is adapted for use between two mutually rotating components of an electromagnetic energy transmission system and provides simultaneous protection against contamination from the environment and unwanted electromagnetic leakage. In the illustrative embodiment, a first set of grooves is cut into the exterior of a first conductive cylindrical component whose interior contains a portion of a millimeter-wave beam waveguide energy transmission system, the grooves comprising the electromagnetic portion of the seal and a second set of grooves is cut into the interior of the conductive housing enclosing the first conductive cylindrical component.

Abstract: A combined environmental and electromagnetic rotary seal. The invention is adapted for use between two mutually rotating components of an electromagnetic energy transmission system and provides simultaneous protection against contamination from the environment and unwanted electromagnetic leakage. In the illustrative embodiment, a first set of grooves is cut into the exterior of a first conductive cylindrical component whose interior contains a portion of a millimeter-wave beam waveguide energy transmission system, the grooves comprising the electromagnetic portion of the seal and a second set of grooves is cut into the interior of the conductive housing enclosing the first conductive cylindrical component.

Abstract: A combined environmental and electromagnetic rotary seal. The invention is adapted for use between two mutually rotating components of an electromagnetic energy transmission system and provides simultaneous protection against contamination from the environment and unwanted electromagnetic leakage. In the illustrative embodiment, a first set of grooves is cut into the exterior of a first conductive cylindrical component whose interior contains a portion of a millimeter-wave beam waveguide energy transmission system, the grooves comprising the electromagnetic portion of the seal and a second set of grooves is cut into the interior of the conductive housing enclosing the first conductive cylindrical component.

Abstract: In various representative aspects, the present invention provides systems and methods for waveguides. A waveguide may comprise a housing and a plurality of reflective surfaces configured to couple to the housing. The housing may be configured to couple to an electromagnetic wave beam generator. The electromagnetic wave beam generator may, be configured to provide a wave beam having a polarization substantially similar to its initial polarization. At least one of the plurality of reflective surfaces may be configured to convert the mode of an incident wave beam. The plurality of reflective surfaces may be configured for alignment in a waveguide.

Abstract: In various representative aspects, the present invention provides systems and methods for waveguides. A waveguide may comprise a housing and a plurality of reflective surfaces configured to couple to the housing. The housing may be configured to couple to an electromagnetic wave beam generator. The electromagnetic wave beam generator may, be configured to provide a wave beam having a polarization substantially similar to its initial polarization. At least one of the plurality of reflective surfaces may be configured to convert the mode of an incident wave beam. The plurality of reflective surfaces may be configured for alignment in a waveguide.

Abstract: A combined environmental and electromagnetic rotary seal. The invention is adapted for use between two mutually rotating components of an electromagnetic energy transmission system and provides simultaneous protection against contamination from the environment and unwanted electromagnetic leakage. In the illustrative embodiment, a first set of grooves is cut into the exterior of a first conductive cylindrical component whose interior contains a portion of a millimeter-wave beam waveguide energy transmission system, the grooves comprising the electromagnetic portion of the seal and a second set of grooves is cut into the interior of the conductive housing enclosing the first conductive cylindrical component.

Abstract: A compact four-way waveguide power divider (10). The inventive power divider (10) includes an input waveguide (11) that terminates at a junction with two adjacent waveguides on opposite sides of the input waveguide. On the opposite side of the junction is a conducting wall into which is built an inductive septum (20). The inductive septum (20) serves to partially match the input impedance of the structure. Second and third inductive septums (22 and 24) are also built into the output arms of the power divider (10). The purpose of the second and third septums (22 and 24) is twofold. In addition to partially matching the power divider's input impedance, the positions of the second and third septums (22 and 24) can be adjusted to equalize the power division between the output arms. Hence, the waves exiting the four output arms of the power divider have highly equalized amplitudes and phases. Further, the phases at the output ports are equalized by adjusting the lengths of the output arms.

Abstract: A phased array antenna including at least one configurable phase shifter. The configurable phase shifter includes a U-shaped primary waveguide section and multiple switchable waveguide U-shaped sections disposed within the primary section. The switchable waveguide sections include a plunger in the U-shaped waveguide section and one or more solenoids attached to the plunger, driving the plunger in and out such that the switches can be actuated in less than 100 milliseconds. The plunger and the switchable waveguide section are shaped such that the waveguide height is constant in the U-shaped waveguide section when the switch is closed and constant in the primary waveguide section when the switch is open, thereby minimizing return loss. The U-shaped primary waveguide section includes an input port and an output port at opposite sides. A radiating slot is located at the bottom face of the U-shaped primary waveguide section.

Abstract: A space-referenced, rate-stabilized gimbal platform system for use in a vehicle. The system includes a master gimbal mounted to the vehicle frame and having a master platform that is pivotable with respect to a first axis that is perpendicular to the longitudinal axis of the vehicle and pivotable with respect to a second axis that is perpendicular to the first axis; a two-axis rate gyroscope mounted to the master platform; and a slave gimbal having a slave platform for supporting directional apparatus, such as an antenna or sensor. The slave platform is pivotable with respect to a third axis that is parallel to the first axis and pivotable with respect to a fourth axis that is perpendicular to the third axis.