2-D Luneburg Lens Beamforming Network for Planar Phased Array of Antennas to Radiate Near-Field Focused Multibeams
| Autor: | Hsi-Tseng Chou, Hao-Ju Huang, Shang-Che Chang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Beamforming
Physics Phased array business.industry Planar array 020206 networking & telecommunications Near and far field 02 engineering and technology Luneburg lens law.invention Antenna array Lens (optics) Cardinal point Optics law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 68:5904-5915 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2020.2986860 |
| Popis: | In this article, a two-dimensional (2-D) Luneburg lens-based beamforming network (LL-BFN) realizable on parallel-plate-sandwiched substrates is implemented to excite a planar phased array of antennas for near-field focus (NFF) applications of multibeam radiations. The concept is to select a proper position of a cylindrical ring surrounding the 2-D Luneburg lens and intercept the phases on this ring to excite the antenna array for NFF multibeam radiations. The intercepted phases are consistent to that required to excite a planar array for NFF radiation. Due to the circular symmetry characteristics of LL-BFN architecture, the distribution of the resulted multibeams exhibits a spatial shift of focal points when the lens is excited by angularly shifted ports on the LL-BFN. The concept is developed with both the numerical and experimental results shown to validate the feasibility of LL-BFN architecture. Practical implementation of low cost is demonstrated. |
| Databáze: | OpenAIRE |
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