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CST – Computer Simulation Technology

Title:
A novel flat lens horn antenna designed based on zero refraction principle of metamaterials
Author(s):
Q.Wu, P. Pan, F.-Y. Meng, L.-W. Li, J.Wu
Source:
Applied Physics A
Vol./Issue/Date:
Volume: 87, Issue: 2, May 2007
Year:
2007
Page(s):
151–156
Abstract:
In this paper, a horn antenna filled with a metamaterial structure as lens inner the aperture is presented. Unlike conventional curve lenses, the lens is designed in the present work using a fully flat structure, which results in a great improvement for the directivity of the horn antenna based on the zero refraction characteristics of the metamaterial. In this structure, a periodic-structure metamaterial with three-layer metal grids is designed using the CST Microwave Studio for optimization and its zero refraction property is validated. For the characterization of the antenna, the electric-field distribution in radiation area, reflection parameter (S11), gain and radiation pattern are calculated. The results show that the gain of a wide flare angle horn antenna is enhanced with over 2 dB between 16.10–17.30 GHz after the metamaterial is utilized. Therefore, the metamaterial lens horn structure results in aminiaturized antenna design approach compared to the optimum conventional horn of the same aperture size and gain in the interested frequency band.
Document:

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