Harmonic suppressed differential phase shifter

S. Zheng, Y. Pan, Y. Long
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Abstract

For the first time, a broadband differential phase shifter with harmonic suppression is proposed. The proposed structure is not only used to provide a constant differential phase shift over the desired wide bandwidth, but also have a significant harmonic band rejection at the same time. Design formulas for the structure are derived using a systematic analytic technique. The optimal design parameters for different typical differential phase shift values are provided to allow for a quick design procedure. To illustrate the principles, a broadband 45° phase shifter is designed, fabricated and measured. It achieved excellent performance with small insertion loss, small phase deviation and good out of band rejection.
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谐波抑制差分移相器
首次提出了一种带谐波抑制的宽带差分移相器。所提出的结构不仅用于在所需的宽带宽上提供恒定的差分相移,同时还具有显著的谐波带抑制。采用系统解析法推导了结构的设计公式。提供了不同典型差相移值的最佳设计参数,以便快速设计。为了说明其原理,设计、制作并测量了宽带45°移相器。该方法具有插入损耗小、相位偏差小、带外抑制性能好等优点。
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