Miniaturized Rotman lens with applications to wireless communication

Bao-hua SUN; Qiu-yan LIANG; Gao-nan ZHOU

doi:10.1631/FITEE.1900501

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Miniaturized Rotman lens with applications to wireless communication

Special Issue on Evolution and Innovation of Antenna Systems for Beyond 5G and 6G | Updated：2022-05-19

- Miniaturized Rotman lens with applications to wireless communication
- 微型罗特曼透镜在无线通信中的应用
- Frontiers of Information Technology & Electronic Engineering Vol. 21, Issue 1, Pages: 144-158(2020)
- Affiliations：
  
  National Key Laboratory of Science and Technology on Antenna and Microwave, Xidian University, Xi'an 710071, China
- Author bio：
  
  Bao-hua SUN, E-mail: bhsun@mail.xidian.edu.cn
- Funds：
- DOI：10.1631/FITEE.1900501
  CLC： TN819.1
- Received：18 September 2019，
  
  Revised：2020-;1-19，
  
  Published：2020-01
- Accepted：
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Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU. Miniaturized Rotman lens with applications to wireless communication[J]. Frontiers of Information Technology & Electronic Engineering, 2020, 21(1): 144-158.
DOI：

Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU. Miniaturized Rotman lens with applications to wireless communication[J]. Frontiers of Information Technology & Electronic Engineering, 2020, 21(1): 144-158. DOI： 10.1631/FITEE.1900501.

摘要

罗特曼透镜是一种具有实时延迟特性、多波束性能和宽带等优点的波束成形网络，在当今无线通信系统中得到广泛应用。然而，在无线通信系统中，传统罗特曼透镜尺寸相当大，可能会影响其与基站天线的集成。介绍3种微型化罗特曼透镜技术（切比雪夫阻抗变换器、功率分配器和带能量分配槽的截断端口）设计透镜，减小端口尺寸，从而减小罗特曼透镜所占总面积。仿真和测量结果表明，该方法可实现透镜主体与馈线之间良好的阻抗匹配。利用该带能量分配槽的截断端口，可大大减小罗特曼透镜尺寸，同时不降低透镜性能或增加生产成本。此外，研究了该微型罗特曼透镜在无线通信系统中两种可能的应用。罗特曼透镜不仅可沿阵列端口提供多个相位差信号实现多波束，还可生成平顶辐射等高性能成形波束。

Abstract

Rotman lens is a type of beamforming network with many advantages

such as true-time delay characteristic

multibeam capability

and wide bandwidth. Rotman lens has been used in a wide range of applications in today's wireless communication systems. However

the size of a conventional Rotman lens is considerably large. So

difficulties may arise with respect to its integration with base station antennas in wireless communication systems. In this study

three techniques for the miniaturization of a Rotman lens

i.e.

Chebyshev impedance transformers

power dividers

and truncated ports with energy distribution slots

are introduced to design the Rotman lens to reduce the size of the ports and hence the total area occupied by the Rotman lens. Simulation and measurement results indicate that good impedance matching between the lens body and its feed lines can be achieved. Using the proposed truncated ports with energy distribution slots

the size of the Rotman lens can be greatly reduced without performance degradation or production cost increment. Moreover

two possible applications of the proposed miniaturized Rotman lens to wireless communication systems are investigated. Rotman lens can not only provide multiple phase difference signals along the array ports to realize multibeams

but also generate high-performance formed beams such as flat-topped radiation pattern.

关键词

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references

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