Design of compact wideband Rotman lens for 5G multibeam application

Fu Yufan; Zhou Dongfang; Zhang Yi; Lü Dalong; Zhang Dewei; Xu Fei

doi:10.11884/HPLPB202133.200291

Volume 33 Issue 3

Mar. 2021

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Fu Yufan, Zhou Dongfang, Zhang Yi, et al. Design of compact wideband Rotman lens for 5G multibeam application[J]. High Power Laser and Particle Beams, 2021, 33: 033006. doi: 10.11884/HPLPB202133.200291

Citation:

Fu Yufan, Zhou Dongfang, Zhang Yi, et al. Design of compact wideband Rotman lens for 5G multibeam application[J]. High Power Laser and Particle Beams, 2021, 33: 033006. doi: 10.11884/HPLPB202133.200291

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Design of compact wideband Rotman lens for 5G multibeam application

doi: 10.11884/HPLPB202133.200291

1.
PLA Strategic Support Force Information Engineering University, Zhenzhou 450001, China
2.
PLA 31437 Force, Shenyang 110000, China

Received Date: 2020-10-22
Rev Recd Date: 2021-01-23

Available Online: 2021-03-30

Publish Date: 2021-03-05

Abstract

Abstract

In this paper, a compact broadband Rotman lens beamforming network based on equal optical path difference is proposed. The beamforming network is intended for applications in a multi-beam antenna array of 5G millimeter-wave (mm-wave) communication. Firstly, the theoretical design of the Rotman lens is introduced in detail. A power divider is used to replace the standard single-port feeding mode to generate a high-directional beam, reducing the scattering of the lens’ internal energy and the energy loss at adjacent ports. The Chebyshev multi-stub matching converter is used to optimize the original tapered array output port. To ensure a wide frequency band, the original matching port size is reduced, and the overall size of the lens is reduced by 20%. Measurement results of the improved model, show that the working frequency band of the lens is 16.5−33.8 GHz, of which S₁₁ is better than 15 dB at 17.2−32.0 GHz, and the scanning angle is ±30°. The lens has a simple and compact structure, can effectively provide a stable phase difference signal for adjacent array elements, and achieve the goal of 5G millimeter-wave array multi-beam.
- Rotman lens,
- wideband,
- multi-beam,
- mm-wave,
- array

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References(15)

References

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