Publisher : The Korean Institute of Electromagnetic Engineering and Science
DOI : 10.5515/JKIEES.2016.16.1.7
Title & Authors
Microwave Negative Group Delay Circuit: Filter Synthesis Approach Park, Junsik; Chaudhary, Girdhari; Jeong, Junhyung; Jeong, Yongchae;
This paper presents the design of a negative group delay circuit (NGDC) using the filter synthesis approach. The proposed design method is based on a frequency transformation from a low-pass filter (LPF) to a bandstop filter (BSF). The predefined negative group delay (NGD) can be obtained by inserting resistors into resonators. To implement a circuit with a distributed transmission line, a circuit conversion technique is employed. Both theoretical and experimental results are provided for validating of the proposed approach. For NGD bandwidth and magnitude flatness enhancements, two second-order NGDCs with slightly different center frequencies are cascaded. In the experiment, group delay of and insertion loss of are obtained in the frequency range of 1.935-2.001 GHz.
Bandstop Filter;Frequency Transformation;Filter Approach;Low Pass Filter Prototype;Negative Group Delay;
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