Bus Rapid Transit Simulation Model

Not Available We propose to use microelectromechanical system (MEMS) switches to develop reconfigurable antenna concepts for the Global Hawk Unmanned Aerial Vehicle (UAV). The current need is an antenna that can relay communications from HF to K band, and serve radar functions from VHF to X band. Reconfigurable antennas will be developed that can serve multiple frequency bands using a common aperture. In addition, the antenna could be reconfigures to change polarization and form multiple beams for phased-array functionality. A tile architecture will be developed so that the antenna could ultimately be structurally integrated with the UAV. In Phase I, we will develop Reconfigurable Patch modules (RPMs) that will form the basic building blocks in the tile architecture. Various microstrip patch elements and configurations will be investigated as candidates for the RPMs. A general Adaptive Reconfigurable Feed (GARF) methodology will be utilized to allow the various antenna configurations to have independent feed structures, and hence be tuned independently. Computer simulations will be used to validate designs. A small prototype RPM will be built and tested to show functionality. Finally, a preliminary reconfigurable antenna will be designed for the Global Hawk UAV. The UAV antenna will be refined in Phase II with additional prototypes. Wireless communication repeaters; satellite antennas; satellite reception antennas for automobiles, homes and boats; commercial aircraft antennas; airborne electron intel sensors; mobile Army troop antennas; Naval ship antennas; military ground based communications, sensing, and weapons-control antennas