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Dual circularly polarized sequentially rotated microstrip array with high isolation
Author(s) -
Hall P. S.
Publication year - 1992
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650050511
Subject(s) - optics , circular polarization , standing wave ratio , microstrip , polarization (electrochemistry) , axial ratio , physics , isolation (microbiology) , microstrip antenna , materials science , computer science , telecommunications , antenna (radio) , biology , bioinformatics , chemistry
Sequentially rotated feeding improves the axial ratio and input VSWR bandwidths of circularly polarized arrays. However, when dual polarization is wanted, the method is shown not to improve isolation, as is the case for dual linearly polarized arrays. This deficiency is overcome by squinting the beam. Measured results for a small array confirm this and computations for large arrays indicate performance capabilities.