三通接头和电缆结构负群延时实验

IF 0.9 4区物理与天体物理 Q4 PHYSICS, APPLIED

European Physical Journal-applied Physics Pub Date : 2020-06-06 DOI:10.1051/epjap/2020200016

F. Wan, Xiaoyu Huangi, P. Thakur, A. Thakur, S. Lalléchère, B. Ravelo

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引用次数: 0

摘要

用三叉接头和同轴电缆组成的结构实验了不熟悉的负群延迟现象。描述了NGD发生器的拓扑结构。它由两条平行的50-Ω特性阻抗电缆组成。建立了随电缆物理长度变化的s参数模型。定义了能够理解NGD现象的存在条件。概念验证仅由两个三端口SMA连接器，三个SMA转换和13厘米长的电缆组成。NGD实验在1.5 GHz ~ 3.5 GHz频段进行。实验观测到的三波段NGD方面与理论和仿真结果吻合较好。特别是，测量了具有- 3ns NGD电平的高品质NGD电路，在3ghz中心频率下，插入损耗小于2db，回波损耗小于12db。

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Negative group delay experimentation with tee connector and cable structures

The unfamiliar negative group-delay (NGD) phenomenon is experimented with structure constituted by tee-connectors and coaxial cables. The topology of the NGD generator is described. It consists of two parallel 50-Ω characteristic impedance cables. The S-parameter model in function of the cable physical lengths is established. The existence condition enabling to understand the NGD phenomenon is defined. A proof of concept simply is constituted by two three-port SMA connectors, three SMA transitions and 13-cm length cables. The NGD experimentation is performed from 1.5 GHz to 3.5 GHz. Tri-band NGD aspects in good agreement with the theory and simulation is observed experimentally. Particularly, high figure-of-merit NGD circuit with −3 ns NGD level, less than 2 dB insertion loss and 12 dB return loss around 3 GHz centre frequency is measured.

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来源期刊

European Physical Journal-applied Physics 物理-物理：应用

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

1.9 months

期刊介绍： EPJ AP an international journal devoted to the promotion of the recent progresses in all fields of applied physics. The articles published in EPJ AP span the whole spectrum of applied physics research.