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.
Progress In Electromagnetics Research. Volumen: 93 Páginas: 71-90
Índice de impacto JCR y cuartil Scopus: 3.763 (2009); 2.874 - Q1 (2017).
Referencia DOI: 10.2528/PIER09040105
Publicado en papel: Mayo 2009.
B. Andrés-García, L.E. García-Muñoz, V. González-Posadas, F.J. Herraiz-Martínez, D. Segovia-Vargas. Filtering lens structure based on SRRs in the low THz band. Progress In Electromagnetics Research. vol. 93, pp. 71-90, Mayo 2009.