The Research On Key Techniques Of 6-18GHz Solid-state Driving Front-end

Microwave power module(MPM) has become a common high-power device in modern electronic warfare systems, which consists of integrated power modulator, microwave solid state drive amplifier module(SSA) and traveling wave tube amplifier(TWT), for the reason that it combines the advantages of solid state devices and vacuum electronic devices well. Microwave solid state drive amplifier module(SSA) and traveling wave tube amplifier(TWT) work together to provide a relatively flat power output.In general, TWT has an uneven power output for the gain in the middle of band is greater than that of band edge. Thus, gain equalizer, the key component of SSA, is essential to provide appropriate power input to flat the output of TWT. The design specifications of gain equalizer include equalized value, equalized accuracy and voltage standing wave ratio(VSWR).Firstly, this paper analyzes three different kinds of microstrip notches that include single-stub notch, SIR notch and double-stub notch, in order to improve the precision of notches in curve control. As the simulation results showed by HFSS, double-stub notch perform excellently in the flexibility and precision of curve control, among these microstrip notches. Then, two kinds of size-reduced equalizer design are proposed to meet the demand of miniaturized equalizer. Rectangle spiral resonator with enhanced inductive and capacitive contributes to the longitudinal dimensions reduction of equalizer constituted by rectangle spiral resonator. While, an equalizer significantly reduces the both horizontal and vertical dimensions by constructing a novel notch combine composite right/left-handed theory, Low Temperature Co-fired Ceramic technology and doublestub resonator. Finally, the paper presents a 6-18 GHz solid-state driving front-end, a coupler and an equalizer. As the test result shows, the solid-state driving front-end works well, which verifies the reliability of the coupler and the equalizer.