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Ka-band multi-focus and pattern manipulation in near-field based on three-dimensional printed transmit-array antenna.
- Source :
-
IET Microwaves, Antennas & Propagation (Wiley-Blackwell) . 2020, Vol. 14 Issue 6, p510-514. 5p. - Publication Year :
- 2020
-
Abstract
- A simple method to achieve multi-focus and pattern manipulation in antenna near field (NF) is proposed in this study, whose effectiveness is then validated by measurements based on different transmit-array antennas. The radiating aperture is divided into several regions and each region corresponds to one assigned focal point, thus achieving multi-focusing performance. Then, the superposition principle is employed and constrains the multiple foci into a certain area to get a contoured pattern. Three examples are investigated. Ant-A presents four balanced focal spots simultaneously, while Ant-B presents two unbalanced foci. A square flat-top field pattern is obtained for Ant-C. Three-dimensional printing technology is employed to fabricate these lenses, resulting in a low cost and light weight. Measured results coincide well with the numerical design and simulation. The proposed method provides a simple and effective alternative for NF power redistribution and owns great value in such applications as radio-frequency identification, wireless power transmission, millimetre-wave imaging etc. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17518725
- Volume :
- 14
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IET Microwaves, Antennas & Propagation (Wiley-Blackwell)
- Publication Type :
- Academic Journal
- Accession number :
- 143018593
- Full Text :
- https://doi.org/10.1049/iet-map.2019.0651