Vol. 98

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2021-05-29

A Low-Loss Dual-Band Negative Group Delay Circuit with Flexible Design

By Yuwei Meng, Zhongbao Wang, Yu Bai, Shao-Jun Fang, and Hongmei Liu
Progress In Electromagnetics Research Letters, Vol. 98, 33-40, 2021
doi:10.2528/PIERL21041701

Abstract

A low-loss dual-band negative group delay circuit (NGDC) with a flexible design is proposed. The proposed NGDC consists of a transmission line coupled asymmetrically with two step-impedance open-loop resonators. The negative group delay (NGD) times and center frequencies of the lower and upper bands can be tuned independently. To verify the design concept, two dual-band NGDC prototypes I and II are fabricated and measured. The measured NGD times of prototype I are -4.9 ns and -4.8 ns at the center frequencies of 1.949 GHz and 2.054 GHz, respectively. The insertion loss is lower than 2.7 dB and the return loss larger than 11.2 dB in both NGD bands. For prototype II, the NGD times at 1.949 GHz and 2.086 GHz are -4.7 ns and -3.3 ns, respectively. The measured insertion loss is better than 2.4 dB with the return loss larger than 11.9 dB.

Citation


Yuwei Meng, Zhongbao Wang, Yu Bai, Shao-Jun Fang, and Hongmei Liu, "A Low-Loss Dual-Band Negative Group Delay Circuit with Flexible Design," Progress In Electromagnetics Research Letters, Vol. 98, 33-40, 2021.
doi:10.2528/PIERL21041701
http://jpier.org/PIERL/pier.php?paper=21041701

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