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Ka波段宽带谐波抑制定向耦合器
引用本文:鲍鑫,张德伟,邓海林,吕大龙,张毅.Ka波段宽带谐波抑制定向耦合器[J].强激光与粒子束,2018,30(6):063004-1-063004-5.
作者姓名:鲍鑫  张德伟  邓海林  吕大龙  张毅
作者单位:中国人民解放军战略支援部队信息工程大学 信息系统工程学院, 郑州 450001
摘    要:为解决传统分支线定向耦合器带宽较窄,且应用到线性化器等微波元件中时受谐波信号影响较大的问题,提出了一个宽带且带有谐波抑制功能的定向耦合器。该定向耦合器在双支节定向耦合器的基础上增加一个支节,可有效地提高定向耦合器的带宽,同时将其传输线支节替换为低通滤波结构,以实现对高次谐波抑制的作用。仿真结果表明,该定向耦合器的反射系数和隔离度均小于-15 dB,传输损耗小于3.8 dB,波动范围0.5 dB,相位差为90°且与双支节耦合器相比增加1 GHz带宽。满足耦合器的设计指标,可应用到微波元件中,提高微波元件的性能。

关 键 词:谐波抑制    宽带    低通滤波器    分支节    高低阻抗线
收稿时间:2017-10-20

Ka-band wideband harmonic-suppression directional coupler
Institution:Institute of Information System Engineering, PLA Information Engineering University, Zhengzhou 450001, China
Abstract:In order to solve the problem that the traditional directional coupler has a narrow bandwidth and is greatly influenced by harmonic signals, this paper presents a broadband directional coupler with the function of harmonic suppression. The directional coupler adds a branch section to double-branch-line directional coupler, thus can effectively improve the bandwidth. While its transmission lines are added with low-pass filter structures, it can filter harmonics well. The experimental results show that the directional coupler reflection coefficient and isolation are less than -15 dB, the transmission loss is more than -3.8 dB, the fluctuation range is 0.5 dB and the phase difference is 90°. It satisfies the design requirement of coupler, and can be applied to microwave components to improve the performance.
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