Abstract: A cavity-backed slot antenna system provided in this disclosure is installed in a housing of an electronic device and includes a metal cavity, a supporting element, an antenna device, a conductive post, and a coupling metal part. The metal cavity is in the housing and includes an opening and a closed surface opposite to each other. A slot is on the closed surface. The supporting element is in the metal cavity. The antenna device is in the metal cavity and on the supporting element, to expose one side surface of the antenna device. The antenna device includes a feed source. The conductive post penetrates the antenna device and connects to the metal cavity. The coupling metal part is in the housing and close to the opening of the metal cavity, so that the coupling metal part is close to and corresponds to the feed source of the antenna device.

Abstract: A hybrid power system including a transmission module, a motor, an engine generator, an energy storage module, and an electrical energy distributor is disclosed. The motor is connected to the transmission module. The electrical energy distributor is coupled to the motor. The engine generator is coupled to the electrical energy distributor. The engine generator is adapted to rotate at a constant speed to generate a first power, and the first power is transmitted to the motor and the energy storage module by the electrical energy distributor.

Abstract: A system and method for analyzes a circuit design by obtaining a circuit simulation waveform of a circuit design. The circuit simulation waveform has signals associated with one or more of a read transaction and a write transaction of the circuit design. Further a first graph representation is created from a first signal of the signals of the circuit simulation waveform. The first graph representation includes a first node corresponding to an edge of the first signal. A first simulation property of the circuit design is determined from the first graph representation, and the first simulation property is output.

Abstract: A cavity-backed slot antenna system provided in this disclosure is installed in a housing of an electronic device and includes a metal cavity, a supporting element, an antenna device, a conductive post, and a coupling metal part. The metal cavity is in the housing and includes an opening and a closed surface opposite to each other. A slot is on the closed surface. The supporting element is in the metal cavity. The antenna device is in the metal cavity and on the supporting element, to expose one side surface of the antenna device. The antenna device includes a feed source. The conductive post penetrates the antenna device and connects to the metal cavity. The coupling metal part is in the housing and close to the opening of the metal cavity, so that the coupling metal part is close to and corresponds to the feed source of the antenna device.