Open AccessDual‐band dual sense microstrip antenna with improved characteristics
Author(s) -
Chakrabarti S.,
Chakraborty A.
Publication year - 2018
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.2018.5009
Subject(s) - multi band device , bandwidth (computing) , microstrip antenna , optics , c band , microstrip , physics , axial ratio , electrical impedance , patch antenna , antenna (radio) , electrical engineering , circular polarization , telecommunications , engineering
The development of a dual polarised microstrip antenna for S‐ and C‐band with improved characteristics is presented. It is dual linearly polarised at S‐band and dual circularly polarised at C‐band. Two orthogonal feeds have been conceived for proximity coupling at S‐band. The other two composite feeds are aperture coupled at C‐band. These generate left‐hand and right‐hand circular polarisations exclusively. The antenna reveals 3.5% or more impedance bandwidth at the S‐band ports with an isolation better than 22 dB (the best isolation is ≈31.5 dB at the band‐centre). It yields >21.2% impedance bandwidth and about 10.2% axial‐ratio bandwidth at each of the C‐band ports, both being improved compared to the earlier reports. Achieved isolation between the C‐band ports is better than 18.5 dB (≈23.5 dB at the centre of the working band).