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In this letter, a novel design for a dual-band negative group delay circuit (NGDC) is proposed. Based on the topology of a single-band reflection type NGDC, composite right/left handed λ/4 short stubs are employed to obtain a negative group delay (NGD) at two separate frequency bands simultaneously. In order to achieve a bandwidth extension, the proposed structure consists of a two-stage dual-band...
This paper proposes a novel design and implementation of a dual-band negative group delay circuit (NGDC) using composite right/left handed (CRLH) transmission line. CRLH λ/4 short stubs and a broadband 3dB 90° hybrid coupler are employed to obtain simultaneously the negative group delay (NGD) condition at two separate bands. The proposed design methodology was used to design a dual-band negative group...
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