Abstract: An ultra-wideband electromagnetic source includes a voltage source and a pulser assembly electrically coupled to the voltage source. The pulser assembly includes a bipolar vector inversion generator (VIG) assembly, a peaking gap assembly coupled to the VIG assembly, and an oil lens assembly coupled to the peaking gap assembly. The ultra-wideband electromagnetic source also includes a balanced antenna assembly including one or more sets of antenna arms coupled to the oil lens assembly and an antenna reflector coupled to the one or more sets of antenna arms.

Abstract: A low-power illumination system for use with an associated barrier operator, or independently, comprises at least one illumination unit adapted to be operable via mains power and a backup power supply, such as a battery. Accordingly, if mains power fails, a low-power light element maintained by the illumination unit may be responsively powered by the backup power supply to provide backup lighting. Alternatively, the barrier operator may be configured to detect a mains power failure, such that when such failure is detected, an illumination command signal also needs sent to the at least one associated illumination unit causing for it to be illuminated.

Abstract: A system for selectively changing the operating frequency of an RF receiver includes a receiver having a selection interface, and a frequency matching module removably attached to the barrier operator. After detecting an input on its selection interface, the receiver responsively changes its operating frequency from its current frequency to another frequency, as determined by the input. The frequency matching module then optimizes received signals of the same frequency as the receiver's operating frequency, thereby enhancing the receiver's range of signal detection.

Abstract: An electric motor control having reduced electromagnetic interference (EMI) emissions includes a motor controller, a switch, and a power converter. The motor controller upon receipt of a control signal causes the switch to toggle between two or more states. In one state the power converter produces a half-wave rectified output (50% power) and in another state produces full-wave rectified output (100% power). Thus, when an electric motor is connected to the output of the power converter, the motor's speed and other operating parameters can be controlled by motor controller by changing the state of the switch.