Abstract: A high bay luminaire includes a heat sink having a substantially disc-shaped configuration. A light emitter is connected to the heat sink. A reflector is connected to the heat sink. A yoke is connected to the heat sink. The yoke has a first arm, a second arm, and a top bar. A driver is connected to the yoke so that the driver extends between the first arm and the second arm.

Abstract: A high bay luminaire includes a heat sink having a substantially disc-shaped configuration. A light emitter is connected to the heat sink. A reflector is connected to the heat sink. A yoke is connected to the heat sink. The yoke has a first arm, a second arm, and a top bar. A driver is connected to the yoke so that the driver extends between the first arm and the second arm.

Abstract: A high bay luminaire includes a heat sink having a substantially disc-shaped configuration. A light emitter is connected to the heat sink. A reflector is connected to the heat sink. A yoke is connected to the heat sink. The yoke has a first arm, a second arm, and a top bar. A driver is connected to the yoke so that the driver extends between the first arm and the second arm.

Abstract: A high bay luminaire includes a heat sink having a substantially disc-shaped configuration. A light emitter is connected to the heat sink. A reflector is connected to the heat sink. A yoke is connected to the heat sink. The yoke has a first arm, a second arm, and a top bar. A driver is connected to the yoke so that the driver extends between the first arm and the second arm.

Abstract: The conventional way of achieving an identification, friend or foe (IFF) function for a moveable subject requires the subject to carry a transponder that emits a coded return when a radar pulse is received by its receiver. In the present invention, an IFF system is disclosed which departs from the conventional transponder method and employs no radio-frequency power source. Instead, it uses the scattering or reflecting properties of an antenna to modulate, in a distinctive manner, the radar return from a moveable subject. A binary sequence code generator modulates the impedance of a receiver antenna, with the reflected signal being detected and correlated with a synchronized code sequence at the radar.