用于空间功率合成的新型2×2渐变鳍线阵分析与设计  

Analysis and Design of a New 2×2 Tapered Finline Array for Spatial Power Combining

作　　者：刘亚威[1,2] 苏小保[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《电子与信息学报》2015年第5期1255-1259,共5页Journal of Electronics & Information Technology

摘　　要：渐变鳍线阵在空间功率合成放大器中具有重要的应用价值。该文简化渐变鳍线阵的模型,将渐变鳍线阵设计等效为TE模式波阻抗的渐变阻抗变换,采用谱域导纳法计算渐变鳍线阵的传播常数,依据小反射理论,提出一种新型基于Hecken形式的紧凑、宽带渐变鳍线阵。利用高频仿真软件HFSS进行优化仿真设计,通过引入槽线微带过渡电路,实际加工了X波段2×2鳍线阵,背靠背测试结果表明：在X波段（8~12 GHz）内,反射系数小于-12d B,插入损耗小于1 d B,实测结果与理论计算吻合。该文系统地给出渐变鳍线阵设计优化的理论计算和仿真方法,对基于波导内空间功率合成模块设计具有指导意义,具有良好的工程应用前景。Tapered finline array plays an important role in waveguide-based spatial power combiner. This paper presents a simplified model of tapered finline array by taking it as a tapered TE mode wave impedance transformer. The spectral domain admittance method is applied for deriving the propagation constant. Based on the small reflection theory, a new compact and broadband Hecken finline taper array is proposed. The structure is simulated and optimized by HFSS. By introducing slotline-to-microstrip line transition, the finline array in X-band is manufactured. The back-to-back test results of optimal 2×2 Hecken finline taper arrays consistent with theoretical values show that the return coefficient is less than-12 d B and the insert loss is less than 1 d B in X-band（8~12 GHz）. This paper presents the method of analysis and design of the finline array, and provides a guideline for designing the waveguide-based power combiner. It serves as a promising circuit for power combining.

关 键 词：渐变鳍线阵 波导内空间功率合成 Hecken曲线 谱域导纳法 

分 类 号：TN830.6[电子电信—信息与通信工程]