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- Title
Suppressing Side-Lobe Radiations of Horn Antenna by Loading Metamaterial Lens.
- Authors
Qi, Mei Qing; Tang, Wen Xuan; Ma, Hui Feng; Pan, Bai Cao; Tao, Zui; Sun, Yong Zhi; Cui, Tie Jun
- Abstract
We propose a new approach to control the amplitude and phase distributions of electromagnetic fields over the aperture of a horn antenna. By loading a metamaterial lens inside the horn antenna, a tapered amplitude distribution of the aperture field is achieved, which can suppress the side-lobe radiations of the antenna. The metamaterial is further manipulated to achieve a flat phase distribution on the horn aperture to avoid the gain reduction that usually suffers in the conventional low-sidelobe antenna designs. A prototype of the metamaterial-loaded horn antenna is designed and fabricated. Both numerical simulations and measured results demonstrate the tapered aperture-field distribution and significant reduction of side-lobe and back-lobe radiations in the operating frequency band.
- Subjects
HORN antennas; AMPLITUDE estimation; METAMATERIALS; COMPOSITE materials; RADIATION
- Publication
Scientific Reports, 2015, p9113
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep09113