一种基于径向波导的Ka波段宽带功分器设计  

A Ka Band Power Divider Based on Radial Waveguide

作　　者：陈会林[1] 谢小强[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《微波学报》2010年第S1期258-261,共4页Journal of Microwaves

摘　　要：本文提出了一种新型的基于径向波导的Ka波段八路功率分配器。为了拓展该功率分配器的带宽,我们采用了一种对称的过模同轴波导将输入信号馈入径向波导,同时在径向波导的底部采用阶梯阻抗变换技术实现阻抗的匹配,根据电磁仿真模拟,其-20dB回波损耗的带宽大约是28.57%(从30至40千兆赫),而且在该频段此结构能够得到良好的幅度不平衡度和相位不平衡度。这种结构不仅具有宽带宽,低插入损耗和高输出功率等优点,而且体积小,功率合成效率和散热效率高,具有毫米波宽带大功率合成应用的潜力。This paper proposes an improved 1:8 power divider based on radial waveguide at ka-band.To widen the bandwidth of the divider/combiner,an axially symmetric oversized coaxial waveguide is used to transform input to the radial waveguide,and at the bottom of the radial waveguide,stepped-impedance technology is used to realize the impedance match.According to EM simulations,the simulated-20dB return loss bandwidth is approximately 28.57%(ranging from 30 to 40 GHz),and good amplitude imbalance and phase imbalance are observed in the band.This structure has properties of not only a wide band,low insertion loss and high output power,but also a small size,a high power combining efficiency and efficient heat sinking,and has potential for millimeter-wave broad-band high power combination.

关 键 词：径向波导 宽带功率分配器 过模同轴波导 阶梯阻抗变换技术 

分 类 号：TN626[电子电信—电路与系统]