NDLI: Near-field uniformity analysis and compensation for finite-sized beam combiner with the asymmetric layout

Content Provider	IET Digital Library
Author	Hao, Kaizi Li, Zhuo Wang, Xin Zhou, Lang Wang, Yiting
Abstract	In a hardware-in-the-loop simulation system, the insertion of an asymmetric layout beam combiner will seriously affect the near-field uniformity. In this study, the effects of the aperture shape, transverse distance and size of the beam combiner on the near-field uniformity were analysed. The square beam combiner with a transverse distance of 0.51 m and a size of 1.05 m × 1.05 m was regarded as the optimal design, but it still cannot meet the test requirements. In order to obtain excellent near-field uniformity, an asymmetric Uniform + Linear taper compensation method was proposed. The maximum values of the amplitude fluctuation (E pv) and phase ripple (φ pv) decreased dramatically from 2.62 dB and 16.79° to 0.78 dB and 7.42°, respectively. Asymmetric Uniform + Linear taper was achieved through serrating the edge of the beam combiner. When the number of serrations N was 22, E pv and φ pv were <0.83 dB and 7.50°, respectively, which indicated that the near-field uniformity can be significantly improved by asymmetric Uniform + Linear taper.
Starting Page	1671
Ending Page	1681
Page Count	11
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 13, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.1082
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-08-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplitude Fluctuation Aperture Shape Asymmetric Layout Beam Combiner Asymmetric Uniform-linear Taper Compensation Method Distance 0.51 M Finite-sized Beam Combiner Hardware-in-the-loop Simulation System Laser Beam Laser Beam Characteristic And Interactions Laser Beam Interactions And Property Near-field Uniformity Analysis Phase Ripple Square Beam Combiner Transverse Distance
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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