Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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By B. Andres-Garcia, L. E. Garcia-Munoz, V. Gonzalez-Posadas, F. J. Herraiz-Martinez, and D. Segovia-Vargas

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A filtering lens for conical horns based on Metamaterials is presented. The paper focuses on a millimeter wave application. The metamaterial structure is composed of a printed layer of Split Ring Resonators (SRRs) on a substrate. The structure is used as a superstrate on the horn aperture. When the SRRs are excited, a filter performance arises preventing radiation in the desired frequency bands. Besides the filtering property, also a lens behavior is achieved. In this way larger gain can be achieved in both E and H planes, reducing the 3 dB beamwidth. A 6% -3 dB stop band is achieved from 73.3 GHz to 85.7 GHz. Symmetrisation of the radiation pattern up to 3 dB is accomplished and the focalization effect is achieved by emulating a hyperbolical-plane lens. Thus, a simplified system based on a conical horn can be designed by unifying the filter and lens in one electromagnetic element.

B. Andres-Garcia, L. E. Garcia-Munoz, V. Gonzalez-Posadas, F. J. Herraiz-Martinez, and D. Segovia-Vargas, "Filtering lens structure based on srrs in the low THz band," Progress In Electromagnetics Research, Vol. 93, 71-90, 2009.

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