Ultra wide band amplifier and multi-carrier transmitting and receiving device based on ultra wide band amplifier

The invention provides an ultra wide band amplifier and a multi-carrier transmitting and receiving device based on the ultra wide band amplifier. The ultra wide band amplifier comprises a power amplifier, a grid upper bias power supply circuit, a grid lower bias power supply circuit, a drain upper bias power supply circuit and a drain lower bias power supply circuit. The grid electrode upper biaspower supply circuit and the grid electrode lower bias power supply circuit supply power to a grid electrode of the power amplifier respectively, the drain electrode upper bias power supply circuit and the drain electrode lower bias power supply circuit supply power to a drain electrode of the power amplifier respectively, and the power amplifier is a GaN amplifier or an LDMOS amplifier. The bandwidth of the power amplifier can be increased to form the ultra wide band amplifier, the ultra wide band amplifier can amplify multiple paths of carrier signals in a radio frequency channel, and the number, the size, the power