An optimization approach based on the genetic algorithms(GAs)for Eplane branch-waveguide couplers is proposed in this paper. The GAs optimization strategies are discussed in detail. A design example for 4-port 5-branc...An optimization approach based on the genetic algorithms(GAs)for Eplane branch-waveguide couplers is proposed in this paper. The GAs optimization strategies are discussed in detail. A design example for 4-port 5-branch 5-dB waveguide couplers is presented. Meanwhile,in this example,some results simulated by the HFSS software,which based on GAs optimization, and other results synthesized by the equivalent-network technique are all presented. Based on the comparison of these results, we find that the results optimized by GAs satisfy the expected requirements. The frequency responses of the couplers with this optimization are improved obviously.展开更多
该文设计并实现了一种具备气密特性的W波段变频组件,该变频组件基于混合微波集成电路技术(HMIC),采用混合集成方式,将本振锁相源、六倍频器、微带-波导过渡电路、E面金属膜片波导滤波器、有源MMIC芯片等进行合理集成。采用波导密封模块...该文设计并实现了一种具备气密特性的W波段变频组件,该变频组件基于混合微波集成电路技术(HMIC),采用混合集成方式,将本振锁相源、六倍频器、微带-波导过渡电路、E面金属膜片波导滤波器、有源MMIC芯片等进行合理集成。采用波导密封模块对W波段波导口进行密封处理以实现组件的气密。实测结果表明,该变频组件可实现信号从X波段到W波段的频率变换,变频增益优于20 d B,射频信号1 d B压缩输出功率大于5 d Bm。该变频组件具备气密特性,实测漏气速率≤1×10^(-7)Pa·m^(3)/s,满足工程应用需求。展开更多
文摘An optimization approach based on the genetic algorithms(GAs)for Eplane branch-waveguide couplers is proposed in this paper. The GAs optimization strategies are discussed in detail. A design example for 4-port 5-branch 5-dB waveguide couplers is presented. Meanwhile,in this example,some results simulated by the HFSS software,which based on GAs optimization, and other results synthesized by the equivalent-network technique are all presented. Based on the comparison of these results, we find that the results optimized by GAs satisfy the expected requirements. The frequency responses of the couplers with this optimization are improved obviously.
文摘该文设计并实现了一种具备气密特性的W波段变频组件,该变频组件基于混合微波集成电路技术(HMIC),采用混合集成方式,将本振锁相源、六倍频器、微带-波导过渡电路、E面金属膜片波导滤波器、有源MMIC芯片等进行合理集成。采用波导密封模块对W波段波导口进行密封处理以实现组件的气密。实测结果表明,该变频组件可实现信号从X波段到W波段的频率变换,变频增益优于20 d B,射频信号1 d B压缩输出功率大于5 d Bm。该变频组件具备气密特性,实测漏气速率≤1×10^(-7)Pa·m^(3)/s,满足工程应用需求。
