Pure left-handed transmission line

Author

Ryu, Y.-H. ; Park, Je-Ho ; Lee, Joun-Ho ; Tae, Heung-Sik

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Kyungpook Nat. Univ., Daegu, South Korea

Volume

4

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

792

Lastpage

798

Abstract

The pure left-handed transmission line (PLH TL) for a broad left-handed (LH) band is presented. It consists of a defected ground structure (DGS) and a wire bonded inter-digital capacitor (WBIDC). The bridged connection of vias to ground makes the components of inductance and capacitance effectively negative. These negative components exclude a parasitic right-handed branch so that the transmission line has only a pure left-handed branch. The equivalent circuit of a bridge type is provided to analyse the structure. The dispersion and S-parameter characteristics of the PLH TL are analysed by circuit analysis, Bloch-Floquet theory, and full-wave simulation. The measured results of dispersion curves and frequency behaviours have good agreements with those of theory and simulation. An optimised PLH TL with wide LH fractional bandwidth of 140% is also designed.

Keywords

capacitors; defected ground structures; equivalent circuits; transmission lines; Bloch-Floquet theory; DGS; PLH TL parameter characteristics; WBIDC; broad left-handed band; capacitance; circuit analysis; defected ground structure; dispersion curves; equivalent circuit; fractional bandwidth; frequency behaviours; full-wave simulation; inductance; parasitic right-handed branch; pure left-handed transmission line; wire bonded inter-digital capacitor;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map.2009.0084

Filename

5487354