| In the paper, the applications of GaAs power devices in the integrated and distributedsolid state transmitters of radar systems have been described in details.In the designing of C band solid state amplifier, the GaAs transistor and microstripsubstrate selection is discussed in the paper. Also, the pulse modulated power source, biascircuit, controlling circuit as well as protection circuit, power combiner, amplifier structureand cooling consideration are explained detailed in this paper.Also introduces a novel power combiner-waveguide/coaxial dual mode coupler. Thecombiner is satisfied in the C and X band solid state amplifier applications.By using the three dimension electromagnetic field software in the power divider andcombiner designing, only one process can make a satisfying result. Dramatically reduce thedeveloping period.The two amplifiers according to the designing method within the paper are passed inthe environment experiment and equiped in the radar systems already.Finally, the techniques of GaAs MMIC manufacture are mentioned in the paper. |
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