A novel mixed conventional microstrip and composite right/left-handed backward-wave directional coupler with broadband and tight coupling characteristics

Author

Caloz, C. ; Itoh, Takayuki

Author_Institution

Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA

Volume

14

Issue

1

fYear

2004

Firstpage

31

Lastpage

33

Abstract

A novel backward directional coupler, composed of a conventional microstrip (CμS) line and composite right/left-handed (CRLH) line, is proposed. This coupler is functionally backward but it is based on a forward-type coupling phenomenon. The coupler is shown to exhibit broad bandwidth and tight coupling characteristics. The theoretical circuit-model results are supported by full-wave and experimental evidence. A quasi 0-dB prototype with more than 50% bandwidth is demonstrated.

Keywords

microstrip directional couplers; nanocomposites; backward directional coupler; broadband coupling; circuit-model; composite right-handed backward-wave directional coupler; coupled-line coupler; forward-type coupling phenomenon; left-handed backward-wave directional coupler; metamaterials; microstrip lines; tight coupling; Bandwidth; Coupling circuits; Directional couplers; Distributed parameter circuits; Frequency; Metamaterials; Microstrip; Prototypes; Shunt (electrical); Transmission line theory;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2003.821506

Filename

1264054