Title :
A Novel Design for a Dual-Band Negative Group Delay Circuit
Author :
Choi, Heungjae ; Jeong, Yongchae ; Lim, Jongsik ; Eom, Soon-Young ; Jung, Young-Bae
Author_Institution :
Dept. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
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 NGDC with different center frequencies connected in a cascade. According to the measurements performed for wide-band code division multiple access and worldwide interoperability for microwave access, an NGD of -3.0 ± 0.4 ns and -3.1 ± 0.5 ns are obtained at 2.12-2.16 GHz and 3.46-3.54 GHz, respectively.
Keywords :
WiMax; code division multiple access; composite materials; delay circuits; metamaterials; NGDC; composite right/left handed λ/4 short stub; dual-band negative group delay circuit; frequency 2.12 GHz to 2.16 GHz; frequency 3.46 GHz to 3.54 GHz; single-band reflection type topology; wide-band code division multiple access; worldwide interoperability for microwave access; Bandwidth; Delay; Dual band; Multiaccess communication; Resistors; Spread spectrum communication; WiMAX; Composite right/left handed (CRLH); dual-band; negative group delay (NGD); wide-band code division multiple access (WCDMA); worldwide interoperability for microwave access (WiMAX);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2089675
