Research Of X-Band Combiners With High Power And Efficiency

With the development of solid-state power devices,the solid-state semi-conductor instruments are widely used in many kinds of electronic systems for the advantages,such as compact package,lightly weight,low noise,high reliability.However,the output power and convert efficiency are depressed for high operating frequency and decreased size.The research of wideband power-combination technology with high-efficiency characteristic comes to be very important.With the multiple demands of high-power combiner,and also aim to our pre-research task,carry on the research wok of the high-power and high-efficiency power combiners at X-band.Based on the different configuration,the combiners are classified into three kinds: micro-strip combiner,strip-line combiner and waveguide combiner.The waveguide combiners are investigated detailedly in this paper for they are one of the optimal means to realize high power and high efficiency.Based on the sustentation fund of correlative projects,the X-band solid-state high-power combiners are discussed.The phase and amplitude characteristics are simulated by HFSS for the analysis of the efficiency of the combiner.An eight-way spatial power synthesizing network is proposed based on the theoretically analyze of the synthesizing network.By adopting 3dB waveguide-hybrid and magic-T,the design of the proposed network is realized.The simulation using HFSS shows that the combination efficiency of 90% in the bandwidth of 1100 MHz is achieved.The proposed combiner working on the X band with 1100 MHz bandwidth and 84% combination efficiency used in a 75 W SSPA is fabricated and tested,and good agreements between the simulated and measured results are observed.