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Narrow-beam antennas using an artificial dielectric medium with permittivity less than unity

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Abstract

Radiation from a line source of electric current placed inside a slab of artificial dielectric medium with a permittivity less than unity has been studied. It is found that radiation patterns with single or multiple narrow beams may be obtained by the proper choice of parameters. In a typical case for εr=0.1378, μr=1.322, a beamwidth of about 1° is obtained when the thickness of artificial dielectric slab is about 2.33 times the wavelength.

References

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      • J.H. Harris . A proposed passive multiple beam antenna. IEEE Trans. , 371 - 373
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      • J. Brown . Artificial dielectrics having refractive indices less than unity. Proc. IEE , 51 - 62
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      • W. Rotman . Plasma simulation by artificial dielectric and parallel plate media. IRE Trans. , 82 - 95
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      • T. Tamir , A.A. Oliner . The influence of complex waves on the radiation field of a slot-excited plasma layer. IRE Trans. , 55 - 65

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content/journals/10.1049/el_19710012
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