Title :
Compact negative group delay circuit using defected ground structure
Author :
Chaudhary, Geetika ; Junhyung Jeong ; Phirun Kim ; Yongchae Jeong ; Jongsik Lim
Author_Institution :
Div. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
A novel design of compact negative group delay circuit (NGDC) using U-shaped defected ground structure (DGS) is presented in this paper. The required group delay (GD) time can be controlled by an external resistor connected across the DGS slot. For experimental verification, a single stage NGDC is designed, fabricated, and compared with a circuit simulation. To enhance NGD bandwidth, two stages NGDC with the different center frequencies in cascade are demonstrated and GD of -3.8 ns with maximum signal attenuation of 37.10 dB was obtained on 3.45-3.55 GHz.
Keywords :
circuit simulation; defected ground structures; delay circuits; microwave circuits; network synthesis; resistors; DGS; NGDC; U-shaped defected ground structure; circuit simulation; compact negative group delay circuit; external resistor; frequency 3.45 GHz to 3.55 GHz; gain 37.10 dB; time -3.8 ns; Attenuation; Delays; Frequency measurement; Integrated circuit modeling; RLC circuits; Resistors; Resonant frequency; Defected ground structure; negative group delay; transmission line;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2013 Asia-Pacific
Conference_Location :
Seoul
DOI :
10.1109/APMC.2013.6695178
