Abstract: Microelectromechanical systems (MEMS) switches are disclosed. Parallel configurations of back-to-back MEMS switches are disclosed in some embodiments. An isolation connection of constant electrical potential may be made to a midpoint of the back-to-back switches. In some embodiments, a separate MEMS switch is provided as a shunt switch for the main MEMS switch. MEMS switch device configurations having multiple switchable signal paths each coupling a common input electrode to a respective output electrode are also disclosed. The MEMS switch device includes shunt switches each coupling a respective output electrode to a reference potential. The presence of a shunt switch coupled to an output electrode enhances the isolation of the signal path corresponding to that output electrode when the path is open.

Abstract: Impedance paths for integrated circuits having microelectromechanical systems (MEMS) switches that allow for electrical charge to bleed from circuit nodes to fixed electric potentials (e.g., ground) are described. Such paths are referred to herein as charge bleed circuits. The circuit nodes may be circuit locations where electrical charge may accumulate because there is no other path for the electrical charge to dissipate. In some embodiments, a charge bleed circuit includes a switchable device (e.g., a MEMS switch, a solid-state device switch, or a circuit including various solid-state device switches that, collectively, implement a device that can be switched on and off) that connects and disconnects the impedance path from a circuit node. This may allow the device to perform different types of measurements at desired performance levels.

Abstract: Space vehicles configured with a micrometeoroid and orbital debris (MMOD) protection system are described herein. The MMOD protection system can include (a) a front face sheet and a rear face sheet spaced apart from the front face sheet directed outwardly, and the rear face sheet being positioned to attach to the space launch vehicle; (b) at least one absorption core layer and at least one impact resistant fabric layer positioned between the front face sheet and the rear face sheet; and (c) an expandable adhesive layer carried by the rear face sheet to attach the MMOD protection system to the space launch vehicle. The front face sheet and the rear face sheet can comprise a metal matrix composite. The MMOD protection system can protect the space vehicle from damage in space, while withstanding launch loads, and can accordingly eliminate the need for a protective launch fairing.