Abstract: A micro-electromechanical homopolar generator on a substrate and a method of manufacturing the same. The micro-electromechanical homopolar generator includes first substrate layer having an axial rotor contact portion and a radial edge portion, each having conductive contacts. An axial contact brush and a radial edge brush are coupled to the first and second conductive contacts, respectively. At least one conductive disc is axially aligned with the axial rotor contact portion and a peripheral edge of the conductive disc is proximate the radial edge portion. The axial contact brush and the radial edge brush respectively form an electrical contact with an axial portion and a peripheral edge portion of the conductive disc. At least one magnet is spaced from the conductive disc to define a magnetic field aligned with an axis of rotation of the conductive disc.

Abstract: A ring focus antenna and method of using same. The ring focus antenna can have a main reflector of revolution shaped as a non-regular paraboloid about a boresight axis of the antenna. A sub-reflector/feed pair is provided comprising a sub-reflector of revolution shaped as a non-regular ellipsoid having a ring-shaped focal point about the boresight axis. A feed element is installed at a feed element location separated spaced from a vertex of the sub-reflector on the boresight axis of the antenna. The main reflector is adapted for operation with multiple sub-reflector/feed pairs having a coupled configuration, and multiple sub-reflector/feed pairs having a decoupled configuration (i.e. classical optical dual reflector system). The main reflector is operable at a plurality of spectrally offset frequency bands. For example, the antenna can be designed for operation over C-band, X-band, Ku-band, and Ka-band.

Abstract: A method and apparatus for dynamically controlling signal power levels in a bi-directional backhaul communication link between a base station and a repeater station is provided. The signal power level of a signal transmitted between a base station and a repeater station is measured at the receiver of the signal. Once the received signal power level has been measured, the power level data based on the received signal power level is automatically transmitted from the receiving station back to the source of the measured signal over the backhaul link. Upon receipt at the source, the power level data is extracted and analyzed to determine if the source needs to alter its transmitted power. Once the power level data is analyzed to determine if a change in the transmitted power is required, the source can automatically respond by increasing, decreasing, or maintaining the transmitted power.