Abstract: A power amplifier circuit, a transmitter, and a network device are provided. The power amplifier circuit includes N input ports, N power amplifier branches, one combiner circuit, and one output port. Each of the N input ports is connected to one power amplifier branch, each of the power amplifier branches is connected to the combiner circuit, and the combiner circuit is further connected to the output port; the N power amplifier branches and the combiner circuit are configured to perform power amplification and combining on N input signals, to generate an output signal. The N power amplifier branches include one first power amplifier branch operates in a class AB or class B operating mode, and N?1 second power amplifier branches operate in a class C operating mode with different gate bias voltages, the gate bias voltages of the N?1 second power amplifier branches become lower in order.

Abstract: An electrically conductive composite material includes carbon nanotubes and graphene nanoplatelets within a polymer matrix. The carbon nanotubes have an average length greater than 10 ?m. The graphene nanoplatelets form in the range of 0.005 wt. % to 0.06 wt. % of the composite material. Also provided is a mixture having such a composition, an article comprising such a composite material, and a composite production method.

Abstract: An electrically conductive composite material includes carbon nanotubes and graphene nanoplatelets within a polymer matrix. The carbon nanotubes have an average length greater than 10 ?m. The graphene nanoplatelets form in the range of 0.005 wt. % to 0.06 wt. % of the composite material. Also provided is a mixture having such a composition, an article comprising such a composite material, and a composite production method.