Miniaturized Tapered EBG Structure With Wide Stopband and Flat Passband

Author

Zhu, Haoran ; Mao, Junfa

Author_Institution

Key Lab. of Minist. of Educ. of China, Shanghai Jiao Tong Univ., Shanghai, China

Volume

11

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

314

Lastpage

317

Abstract

In this letter, a miniaturized tapered electromagnetic band-gap (EBG) structure with wide stopband and flat passband is presented. Chebyshev tapered EBG distribution is adopted to minimize ripples in the passband caused by the periodicity of planar EBG structure. The defected ground structure (DGS) is employed for enlarging the bandwidth of stopband and reducing the size of EBG patterns. Two transmission zeros are introduced by spurline and open stubs to get higher attenuation level. In comparison with traditional planar EBG structure, compact size, flat passband, and wide stopband are achieved in the proposed design. Measured and simulated S-parameters indicate that the proposed design has a relative fractional bandwidth of 93.7% in the stopband below -20 dB.

Keywords

S-parameters; defected ground structures; interference suppression; microstrip lines; periodic structures; photonic band gap; Chebyshev tapered EBG distribution; S-parameters; defected ground structure; electromagnetic band gap; flat passband; miniaturized tapered EBG structure; periodic structure; planar EBG structure; spurline; wide stopband; Bandwidth; Metamaterials; Microstrip; Microstrip filters; Passband; Periodic structures; Spurline; Defected ground structure (DGS); electromagnetic band-gap (EBG); periodic structure; spurline; wide stopband;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2012.2191258

Filename

6171824