DocumentCode :
1196094
Title :
Aperture Coupling and Dipole Excitation in Planar Waveguide Partially Filled With Left-Handed Material
Author :
Zhang, Jian Feng ; Cui, Tie Jun
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing
Volume :
54
Issue :
9
fYear :
2006
Firstpage :
2605
Lastpage :
2614
Abstract :
We present physical concepts and formulations for a parallel-plate waveguide which is partially filled with stratified right-handed and left-handed media and fed by apertures. Based on an exact analysis, high power transmissions can be obtained if the medium parameters and layer thicknesses are properly chosen. Such a structure is called a super waveguide since the transmitted power is extremely larger than that in a conventional air-filled waveguide. The equivalence principle and stratified medium theory are used to set up the integral equation in terms of the magnetic currents on apertures. We have applied the method of moments to discretize the integral equation and solved it numerically. The impact of such magnetic currents to the high-power transmission and their interaction to the original dipole source are investigated. From numerical results, we notice that the transmission power is not as high as we anticipated if the source is outside the waveguide. If the source is placed inside the waveguide through apertures, however, the super waveguide will be realized
Keywords :
inhomogeneous media; integral equations; metamaterials; method of moments; microwave materials; parallel plate waveguides; planar waveguides; aperture coupling; aperture feed; dipole source; equivalence principle; integral equation; left-handed material; magnetic current; method of moment; parallel-plate waveguide; planar waveguide; power transmission; right-handed media; stratified medium theory; super waveguide; Apertures; Couplings; Electromagnetic waveguides; Integral equations; Magnetic materials; Metamaterials; Moment methods; Planar waveguides; Power transmission; Waveguide components; Aperture coupling; high power transmission; integral equation; metamaterials; method of moments (MoM); planar waveguide;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2006.880769
Filename :
1688049
Link To Document :
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