V频段宽带高效率功率合成放大器设计OA北大核心CSTPCD

A V-band broadband high efficiency power-combining amplifier based on waveguide hybrid magic T is introduced.A novel miniaturized high isolation two-way power divider covering the entire V-band is designed using the waveguide hybrid magic T structure and an ultra-wideband fan-shaped open circuit thin film resistor.In 50～75 GHz,the measured average insertion loss is 0.2 dB,the input return loss is less than-20 dB,and the isolation and output return loss are less than-14 dB.Based on this circuit structure,a 3.5 W power module is developed using a V-band broadband GaN power amplifier chip.A V-band broadband high efficiency power-combining amplifier is developed using this power module as the basic unit and the 16-way high-efficiency power dividing/combining network.The test results show that in the full frequency range of the V-band,the continuous wave saturated output power is more than 47 dBm,the small signal gain is more than 46 dB,and the power-combining is more than 82%,high combining efficiency and large output power is achieved in the whole V-band.The circuit has a compact structure,wide operating frequency band,high power combining efficiency,and is easy to dissipate heat,making it highly valuable for engineering applications.