Research And Application Of Power Division/synthesis Technology Based On Suspended Microstrip Line

Solid-state power combining amplifiers are widely used in contemporary electronic communication systems.Nowadays,the development of this technology has been relatively mature,and it is developing in the direction of large output power,wider working frequency band and small size.The output of a single power amplifier chip is far from meeting the system requirements,so the power division/synthesis network is still It is an important part of solidstate amplifiers,and power division/synthesis is still a research hotspot.Today,there are many types of transmission lines used for power division/synthesis,such as waveguide,microstrip,stripline,coaxial,etc.Suspension cables are widely used because of their high Q value,low dispersion,low loss,and wide bandwidth during single-mode transmission.The subject of this paper is based on the actual engineering project,research and application of the power division/synthesis technology based on the suspension wire structure,the main contents are as follows:Starting from the research background and significance of the subject,this paper introduces the relevant theories and main technical indicators of power synthesis technology,the structural characteristics of the suspension cable and the power synthesis system,and carries out follow-up work on this basis.The first is based on the suspension wire structure,a6-18 GHz two-way broadband T-type power divider/combiner is designed by cascading multisection impedance converters.The actual test results show that the return loss is within the entire frequency band.Below-13 d B,the insertion loss is within 1d B.Based on this,a fourway broadband T-type power divider/combiner is designed using binary simulation.The simulation results show that its return loss is below-18 d B and the insertion loss is 0.4 d B or less;Next,starting from the problem of the isolation of the T-type power split/combiner,the bridge and Wilkinson structures were compared,and the bridge with a larger power capacity that can be connected to an external isolation resistor was selected,and an elliptical double With a surface suspension wire structure,a single-section elliptical 3dB bridge was designed by simulation.The simulation results show that it has good indicators,but the bandwidth is not enough,and the four ports are located in two planes.Then,starting from these two problems,pass the metal The vertical transition of the vias solves the coplanarity problem.The multi-section elliptical structure cascades the bandwidth to achieve a broadband elliptical suspension cable 3dB bridge.The measured results show that the return loss is below-14 d B,and the insertion loss Within 0.9d B;finally,through the development of a 6-18 GHz solid-state power amplifier,the designed 3dB bridge was actually used in the power amplifier to verify its engineering applicability and achieved good indicators.