Wideband Flat Negative Group Delay Circuit With Improved Signal Attenuation

被引：11
|
作者：
Wang, Zhongbao [1 ]
Meng, Yuwei [1 ]
Fang, Shaojun [1 ]
Liu, Hongmei [1 ]
机构：
[1] Dalian Maritime Univ, Sch Informat Sci & Technol, Dalian 116026, Liaoning, Peoples R China
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2022年 / 69卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Attenuation; Power transmission lines; Delays; Mathematical models; Wideband; Impedance; Scattering parameters; Low signal attenuation; negative group delay; group delay flatness; closed-form equations; FILTER;
D O I：
10.1109/TCSII.2022.3156537
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel wideband flat negative group delay (NGD) circuit with improved signal attenuation is proposed. The proposed negative group delay circuit (NGDC) is composed of three transmission lines and two parallel branches, which are consisted of two series transmission lines with a resistor linking to a T-type stub. The complete closed-form design equations are presented. For verification, an NGDC is designed, fabricated, and measured at the center frequency of 2.14 GHz. From the measured results, NGD time of -1.11 ns at the center frequency is obtained with an insertion loss of 9.75 dB and return loss of 22.3 dB. The flat-NGD bandwidth reaches 6.1% from 2.072 to 2.202 GHz with +/- 11.5% group-delay fluctuation.
引用
收藏
页码：3371 / 3375
页数：5
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