Ceramic Superstrate-Based Decoupling Method for Two Closely Packed Antennas With Cross-Polarization Suppression
Autor: | Guan-Long Huang, Yingzeng Yin, Yingsong Li, Luyu Zhao, Jiayin Guo, Feng Liu |
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Rok vydání: | 2021 |
Předmět: |
Materials science
Correlation coefficient business.industry Cross polarization Relative permittivity 020206 networking & telecommunications 02 engineering and technology Radiation law.invention Wavelength law visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Optoelectronics Ceramic Dipole antenna Electrical and Electronic Engineering business Decoupling (electronics) |
Zdroj: | IEEE Transactions on Antennas and Propagation. 69:1751-1756 |
ISSN: | 1558-2221 0018-926X |
Popis: | A ceramic superstrate-based decoupling method (CSDM) is proposed to reduce the mutual coupling between two closely packed dipole antennas while maintaining cross-polarization suppression. Compared with other superstrate-based methods, this proposed method can effectively reduce the mutual coupling between the antennas without using any periodic structures on the superstrate. The ceramic superstrate is a 2 mm thin slab with a relative dielectric constant of 20.5 and is suspended over the antennas coupled in H-plane with the spacing of only 0.28 wavelength at 3.5 GHz. It is demonstrated by both simulation and measurement that the isolation between two dipole antennas can be improved from 10 to more than 25 dB within the operation band while their reflection coefficients remain to be below −10 dB after the ceramic superstrate is introduced. The radiation patterns of the antenna maintain stable at different operation frequencies within the band of interest and the peak gain has increased by around 1.5 dB. Meanwhile, the total efficiency is enhanced by about 15% and the envelope correlation coefficient (ECC) between the two antennas is reduced from 0.7 to 0.4. |
Databáze: | OpenAIRE |
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