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Dielectric Resonator Negative Group Delay Circuit
Radio Science ( IF 1.6 ) Pub Date : 2021-04-11 , DOI: 10.1029/2020rs007254
Taochen Gu 1 , Fayu Wan 1 , Preeti Thakur 2 , Atul Thakur 2 , Sébastien Lalléchère 3 , Wenceslas Rahajandraibe 4 , Blaise Ravelo 1
Affiliation  

This study investigates an innovative theory on design of dielectric resonator (DR) based negative group delay (NGD) microwave circuit. The NGD circuit is mainly constituted by a cylindrical bulk of DR as a coupling element with a microstrip line. The developed theory is analytically established from the S‐parameters modeling of this innovative DR NGD topology. The NGD analysis and synthesis equations are formulated by considering the key parameters of the DR NGD cell. The NGD existence condition as a function of the DR and microstrip line parameters is also introduced. The behavioral response of the bandpass NGD function is verified with different designed proof‐of‐concepts (POCs). The developed NGD DR topology was validated with original circuit design by commercial simulations and experimentations with insertion and reflection losses lower than 4 and 10 dB, respectively. The POC prototypes operate with low attenuation losses in mono band and dual bands up to 10 GHz. Single NGD cells with DR coupled with “I” and “U” shape microstrip lines operating at different central frequencies were designed and implemented. Then, dual‐band NGD circuits operating at approximately 2.5 and 5 GHz were also tested. The possibility to widen the NGD bandwidth with double DR NGD circuits was investigated.

中文翻译:

电介质谐振器负群延迟电路

这项研究调查了基于介电谐振器(DR)的负组延迟(NGD)微波电路设计的创新理论。NGD电路主要由DR的圆柱体构成,作为带有微带线的耦合元件。从这种创新的DR NGD拓扑的S参数模型分析建立了发展的理论。通过考虑DR NGD电池的关键参数,可以制定NGD分析和合成方程式。还介绍了NGD的存在条件,它是DR和微带线参数的函数。带通NGD功能的行为响应已通过不同的设计概念验证(POC)进行了验证。已开发的NGD DR拓扑已通过商业仿真和实验,通过原始电路设计进行了验证,插入和反射损耗分别低于4 dB和10 dB。POC原型在高达10 GHz的单频段和双频段中以低衰减损耗运行。设计并实现了具有DR的单个NGD单元,以及在不同中心频率下工作的“ I”和“ U”形微带线。然后,还测试了工作在大约2.5 GHz和5 GHz的双频带NGD电路。研究了使用双DR NGD电路加宽NGD带宽的可能性。设计并实现了具有DR的单个NGD单元,以及在不同中心频率下工作的“ I”和“ U”形微带线。然后,还测试了工作在大约2.5 GHz和5 GHz的双频带NGD电路。研究了使用双DR NGD电路加宽NGD带宽的可能性。设计并实现了具有DR的单个NGD单元,以及在不同中心频率下工作的“ I”和“ U”形微带线。然后,还测试了工作在大约2.5 GHz和5 GHz的双频带NGD电路。研究了使用双DR NGD电路加宽NGD带宽的可能性。
更新日期:2021-04-22
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