Research On V-band Full-frequency Radial Power Combining Network

The rapid development of radio communication technology has made the millimeter wave technology widely concerned in the field of communication.The V-band in the millimeter wave has good security features,so it has a good application prospect.However,at this stage,the output power of a single solid-state power amplifier component in the V-band is limited,so power synthesis technology is required to increase the output power.Based on the research status at home and abroad,this paper proposes a full-waveguide network structure for radial synthesis,focusing on the design of broadband power synthesis passive network,and verifying the achievability of the scheme through simulation work.In this thesis,a radial waveguide power synthesis structure based on the circular waveguide TE₀₁ mode is designed.This structure can distribute or synthesize 16 signals in the same plane.The design structure includes a square-circle mode converter and a 16-way power divider.The isolation between the ports of divider was improved by adding a resistive diaphragm.The simulation results verify the correctness of the design.A radial waveguide power synthesis structure based on the circular waveguide TM₀₁mode which has a wider working bandwidth than the former and can reach the entire V-band is designed in the thesis.In this thesis,the working principle and design and simulation process of mode converter and 16-channel distributor are expounded.The simulation results show that the structure has good bandwidth characteristics and amplitude and phase consistency.Regarding the isolation problem,the method of opening the resistive groove and verifying the feasibility on the 36-way distributor is used in the thesis.The design of a single-channel power amplifier as an active part of the composite network,including gain driver stage,power amplifier stage and waveguide-microstrip conversion structure is proposed.Both the gain stage and the power amplifier stage use an MMIC chip and the chip is mounted by eutectic technology.The waveguide-microstrip conversion uses a microstrip probe-waveguide transition structure.At the end of this thesis,the design of the whole power synthesis amplifier structure is proposed,and the physical object is processed.The correctness of the synthetic scheme of this thesis is verified by testing and analysis.