Title :
A broadband series power divider using zero-degree metamaterial phase-shifting lines
Author :
Antoniades, Marco A. ; Eleftheriades, George V.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont., Canada
Abstract :
A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth is presented, which can be extended to an arbitrary number of output ports. The divider comprises four nonradiating metamaterial lines in series, incurring a zero insertion phase over a large bandwidth, while simultaneously maintaining a compact length of λ0/8. Compared to a series power divider employing conventional one-wavelength long meandered transmission lines to provide in-phase signals at the output ports, the metamaterial divider provides a 165% increase in the input return-loss bandwidth and a 155% and 154% increase in the through-power bandwidth to ports 3 and 4, respectively. In addition, the metamaterial divider is significantly more compact, occupying only 2.6% of the area that the transmission line divider occupies. The metamaterial and transmission line dividers exhibit comparable insertion losses.
Keywords :
metamaterials; power dividers; transmission lines; broadband series power divider; left-handed materials; meandered transmission lines; metamaterial 1:4 series power divider; negative refractive index; nonradiating metamaterial lines; transmission line dividers; zero insertion phase; zero-degree metamaterial phase-shifting lines; Bandwidth; Dielectric losses; Feeds; Insertion loss; Metamaterials; Power dividers; Power transmission lines; Propagation losses; Refractive index; Transmission line theory; Left-handed (LH); metamaterial; negative refractive index (NRI); power combining; power divider; slow wave;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.859007