一种新型的可配置传输型微带负群时延电路

发布时间：2018-05-31 02:12

本文选题：传输型 + 负群时延　；参考：《东南大学学报(自然科学版)》2017年05期

【摘要】：提出了一种基于有耗微带耦合谐振单元的传输型负群时延电路,该电路利用电阻加载的方式实现负群时延值的灵活调节.微带耦合谐振单元电路中采用了开路扇形线结构,有效减小了电路尺寸.基于有耗耦合线谐振单元的等效网络模型,分析了加载电阻及耦合系数对信号传输及负群时延特性的影响,并对整体微带电路进行了三维电磁仿真分析.设计加工了一款两级传输型负群时延电路实验样品,在耦合谐振器特定位置分别加载100~300Ω范围内不同阻值电阻的状态下,对该电路的群时延特性进行了测试.结果表明:在中心频率1.79 GHz附近,该电路可配置获得-2~-12 ns的负群时延值,其最大信号衰减在6~10 d B范围内.这种新型的负群时延电路具有结构紧凑、信号衰减小、负群时延值可灵活配置等优点.
[Abstract]:A transmission negative group delay circuit based on lossy microstrip coupled resonant unit is proposed. The circuit can flexibly adjust the negative group delay by means of resistor loading. In the microstrip coupled resonant cell circuit, the open circuit sector structure is adopted, which effectively reduces the size of the circuit. Based on the equivalent network model of lossy coupling line resonance unit, the effects of load resistance and coupling coefficient on signal transmission and negative group delay characteristics are analyzed, and the three-dimensional electromagnetic simulation of the whole microstrip circuit is carried out. An experimental sample of a two-stage transmission negative group delay circuit is designed and fabricated. The group delay characteristics of the circuit are tested under the condition that the coupling resonator is loaded with different resistance values in the range of 100 ~ 300 惟 respectively at the specific position of the coupled resonator. The results show that at the center frequency of 1.79 GHz, the circuit can be configured to obtain a negative group delay of -2ns-12 ns, and its maximum signal attenuation is in the range of 610dB. This novel negative group delay circuit has the advantages of compact structure, low signal attenuation and flexible configuration of negative group delay.
【作者单位】：东南大学毫米波国家重点实验室;
【分类号】：TN702

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