Journal
SENSORS
Volume 22, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/s22239152
Keywords
dual band; linear-to-circular converter; periodic array
Funding
- National Natural Science Foundation of China
- [61831001]
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This paper presents the design of a polarizer that can perform over a wide range of bandwidths in dual frequency bands. The proposed polarizer is ultrathin, works in dual wide-bands, is polarization-diverse, and maintains performance over +/- 45 degrees and +/- 30 degrees oblique incidences.
Major challenges affecting polarizers for communication systems include the inability to perform over a wide bandwidth with a simple design. Orthogonal outgoing polarization for polarization-diverse applications and stable performances for oblique incidence angles are also major requirements. This paper presents the design of a polarizer that can perform over a wide range of bandwidths in dual frequency bands. The unit cell is uniquely designed using a split circular ring resonator enclosed in a square ring with the addition of three-square patches. As a result, the incoming linearly polarized x(y) wave is converted into a transmitted LHCP (RHCP) wave in the Ku and Ka bands. The operational bandwidths are 11.05 similar to 16.75 GHz (41%) and 34.16 similar to 43.03 GHz (23%). The proposed polarizer is ultrathin, works in dual wide-bands, is polarization-diverse, and maintains performance over +/- 45 degrees and +/- 30 degrees oblique incidences, which makes it a strong candidate for many communication systems.
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