High-power amplifier modules of the 100 MHz to 350 MHz frequency band above 1200 W require the use of devices including four-way power combiner and directional coupler.In order to achieve the design goals of high power capacity,small volume,wide band and easy module coupling,a high-power directional combiner in VHF band is designed.By using the reverse balanced magnetic circuit design,the magnetic loss of the magnetic core is effectively reduced,and the design of the wideband small-volume tansmission line transformer under high power conditions is realized.By using microstrip coupling circuit and transmission line transformer combiner circuit integrated,the broadband high-power directional combiner and power amplifier module shows that 1200 W can be stable for a long time in the full frequency band of 100 MHz to 350 MHz,and the occupied volume is reduced by more than 60%compared with the raditional multiple combined devices.
power combinerdirectional couplertransmission line transformerstrip line
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