Using microcontroller MSP430F449 as the operation core, a low noise wideband amplifier provided with 5v single power supply is designed.

In this paper, a new high power and wideband amplifier with permanent periodic magnet (PPM) focusing is presented. It consists of klystron and FEM.

Wideband amplifier, realized by the technology of automatic gain control (AGC), is used widely in radar system and other correlative electronic fields.