Open AccessDesign and experimental validation of dual‐band circularly polarised horn filtenna
Author(s) -
Barbuto M.,
Trotta F.,
Bilotti F.,
Toscano A.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.0145
Subject(s) - optics , wideband , french horn , horn antenna , physics , antenna (radio) , radio spectrum , circular polarization , resonator , communications satellite , frequency band , feed horn , retroreflector , acoustics , satellite , directional antenna , radiation pattern , telecommunications , computer science , microstrip , slot antenna , periscope antenna , laser , astronomy
A simple and cheap solution is proposed to transform a wideband and linearly polarised horn antenna in a dual‐band circularly polarised horn filtenna. The filtering and polarisation transformation capabilities are achieved by inserting inside the throat of the horn a complementary electrically small resonator etched on a thin metallic sheet. In this way, the overall structure is well matched in two frequency ranges (13–14 and 16.4–17 GHz) and radiates left‐handed and right‐handed circularly polarised fields in the lower and upper frequency bands, respectively. The measurements performed on a realised prototype confirm the good performance of the proposed structure, which may be employed in satellite communication systems requiring different circular polarisation for the up‐ and down‐link frequency ranges.