Abstract
This article presents a new linear-to-circular polarization conversion coding unit, on which two new kinds of beam-shaping lenses are proposed. First, under periodic boundary conditions, a linear-to-circular polarization conversion coding unit is introduced, which introduces the necessary phase delay by adjusting its geometrical parameters. The phase delay ranges from 0° to 360° and is discretized into 3 bit coding units corresponding to specific delays. Second, by properly arranging the coding units, a high-gain circularly polarized (CP) lens is proposed. The lens achieves linear-to-circular polarization conversion and beam collimation in the transmission mode simultaneously with a planar configuration, which is different from counterparts that place a lens atop of a polarizer. Furthermore, the coding units are used to form Wollaston-prism-like and Rochon-prism-like planar CP beam-shaping lenses, which split the beams with different polarizations into right-and left-handed components. These beams can be controlled independently. Prototypes working at 30 GHz band are designed, fabricated, and measured to verify the idea.
| Original language | English |
|---|---|
| Pages (from-to) | 4332-4343 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 68 |
| Issue number | 6 |
| Early online date | 14 Feb 2020 |
| DOIs | |
| Publication status | Published - 2 Jun 2020 |
Bibliographical note
Funding Information:ACKNOWLEDGMENT The authors would like to give their sincere appreciations to Dr. Bin Xi from Sun Yat-Sen University for the help of the antenna measurement. They also thank the University of Technology Sydney Tech Lab for funding support, the Blue Sky and Research Academic Program schemes.
Funding Information:
Manuscript received July 7, 2019; revised December 23, 2019; accepted January 20, 2020. Date of publication February 14, 2020; date of current version June 2, 2020. This work was supported in part by the National Science Foundation of China under Grant 61871189, in part by the Science Foundation of Guangdong Province under Grant 2019A1515011999, in part by the Fundamental Research Funds for the Central Universities under Grant 2018MS14, in part by the Beijing Municipal Natural Science Foundation under Grant 4202047, and in part by the Guangdong Innovative and Entrepreneurial Research Team Program under Grant 2017ZT07X032. (Corresponding author: Shaowei Liao.) Jianfeng Zhu is with the School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510006, China, also with the School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia, and also with the Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China (e-mail: jianfeng.zhu@student.uts.edu.au).
Publisher Copyright:
© 1963-2012 IEEE.
Keywords
- 3-D printing
- beam shaping
- coding polarizer
- lens
- millimeter-wave (mm-wave)
- pencil beam