Open AccessReduction of sidelobe radiations of the standard pyramidal horn using a thin metamaterial lens
Author(s) -
Chen Xuxiang,
Ge Yuehe,
Bird Trevor S.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.3336
Subject(s) - metamaterial , french horn , optics , lens (geology) , horn antenna , aperture (computer memory) , materials science , reduction (mathematics) , superlens , radiation pattern , physics , optoelectronics , acoustics , antenna (radio) , telecommunications , mathematics , computer science , slot antenna , geometry
A method is reported to suppress the sidelobe radiation of a standard pyramidal horn using a thin single‐layer metamaterial lens. The metamaterial lens is composed of two identical metallic dipole arrays printed on both sides of a single dielectric layer. By placing the metamaterial lens inside a standard pyramidal horn, the electromagnetic fields over the horn aperture can be modified, resulting in low‐sidelobe radiation in both the E‐ and H‐ planes of the horn. The measurement of a prototype lens gave a 10 dB reduction of the first sidelobe level in the E ‐plane, compared with that of the original air‐filled pyramidal horn. Other design possibilities with a compensating lens are suggested.