DocumentCode :
981896
Title :
Transmission line approach of left-handed (LH) materials and microstrip implementation of an artificial LH transmission line
Author :
Caloz, C. ; Itoh, T.
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA
Volume :
52
Issue :
5
fYear :
2004
fDate :
5/1/2004 12:00:00 AM
Firstpage :
1159
Lastpage :
1166
Abstract :
A transmission line (TL) approach of left-handed (LH) materials is proposed. The transmission characteristics of an ideal LH-TL are presented, the constitutive parameters of an equivalent LH material are derived and shown to be negative, and some LH-transmission paradoxes are explained. Next, a method to design an artificial LH-TL in the form of an ideal lumped-elements ladder network is described and illustrated with simulation results. It is shown that, in this line, left-handedness can be achieved without losses over an unlimited bandwidth, from the cutoff of the resulting high-pass filter to infinity, with excellent agreement with theory. Finally, a microstrip implementation of the LH line for microwaves, using interdigital capacitors and stub inductors, is demonstrated, with moderate insertion loss and a broad bandwidth of the order of 100%.
Keywords :
capacitors; dielectric materials; high-pass filters; inductors; ladder networks; microstrip antennas; permittivity; transmission line theory; artificial LH transmission line; broad bandwidth; high-pass filter; ideal lumped-element; insertion loss; interdigital capacitor; ladder network; left-handed material; metamaterial; microstrip implementation; microwaves; stub inductor; transmission characteristic; transmission line approach; Bandwidth; Capacitors; Design methodology; Filtering theory; Filters; H infinity control; Inductors; Microstrip; Transmission line theory; Transmission lines; LH; Left-handed; metamaterials; structures; transmission lines;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2004.827249
Filename :
1296824
Link To Document :
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