Increased data transmission speeds for L-3 Communication’s radio frequency signals require more accurate antenna positioning to reduce data loss. The time saved by preventing the re-transmission of data could be used instead to send and receive more data, thus improving data throughput. To do so, L-3 wishes to incorporate a moveable reflector to accurately position a radio frequency signal. The reflector must position itself quickly and accurately in response to a pre-defined path written in a high-level programming language (C# or Matlab). L-3 asked BYU Capstone Team 22 to demonstrate the control of a moveable reflecting device by designing, manufacturing, and testing a device that can rapidly and accurately steer a laser via reflection. The project benefits L-3 Communications by facilitating the development of a fully functional reflector for L-3’s antenna systems. Such a reflector will increase signal efficiency and reduce operating costs, ultimately providing significant advantages to the company’s antenna systems.

The team created two moveable reflectors—each exceeding L-3’s specifications—to demonstrate two unique methods to tilt a reflective surface. Both devices incorporate linear actuators and a laptop computer to control the device. The two designs differ in the manner in which the actuators attach to the reflecting surface. The first device uses compliant (flexible) attachments and a central pivot; the second uses a gimbal and springs. Both devices provide elegant solutions to L-3’s engineering needs.