3D Printed Sub-Terahertz All-Dielectric Lens for Arbitrary Manipulation of Quasi-Nondiffractive Orbital Angular Momentum Waves

2021 ◽  
Author(s):  
Xiaoyuan He ◽  
Yang Yang ◽  
Li Deng ◽  
Shufang Li ◽  
Botao Feng
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Dielectric Lens ◽  
3D Printed

scholarly journals Experimental evaluation of 3D printed spiral phase plates for enabling an orbital angular momentum multiplexed radio system

2019 ◽  
Vol 6 (12) ◽  
pp. 191419 ◽  
Author(s):  
B. Allen ◽  
T. Pelham ◽  
Y. Wu ◽  
T. Drysdale ◽  
D. Isakov ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Communication Link ◽  
Material Interface ◽  
Radio System ◽  
Dielectric Lens ◽  
3D Printed ◽  
Phase Plates ◽  
Spiral Phase ◽  
Additional Loss

This paper evaluates the performance of three-dimensionally (3D) printed spiral phase plates (SPPs) for enabling an orbital angular momentum (OAM) multiplexed radio system. The design and realization of the SPPs by means of additive manufacturing exploiting a high-permittivity material is described. Modes 1 and 2 SPPs are then evaluated at 15 GHz in terms of 3D complex radiation pattern, mode purity and beam collimation by means of a 3D printed dielectric lens. The results with the lens yield a crosstalk of −8 dB for between modes 1 and −1, and −11.4 dB for between modes 2 and −2. We suggest a mode multiplexer architecture that is expected to further reduce the crosstalk for each mode. An additional loss of 4.2 dB is incurred with the SPPs inserted into the communication link, which is undesirable for obtaining reliable LTE-based communications. Thus, we suggest: using lower loss materials, seeking ways to reduce material interface reflections or alternative ways of OAM multiplexing to realize a viable OAM multiplexed radio system.

scholarly journals An Evaluation of Orbital Angular Momentum Multiplexing Technology

2019 ◽  
Vol 9 (9) ◽  
pp. 1729 ◽  
Author(s):  
Doohwan Lee ◽  
Hirofumi Sasaki ◽  
Hiroyuki Fukumoto ◽  
Yasunori Yagi ◽  
Takashi Shimizu
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Theoretical Study ◽  
Wireless Transmission ◽  
Theoretical Evaluation ◽  
Communication Performance ◽  
Transmission Distance ◽  
Dielectric Lens ◽  
Point To Point ◽  
Insight Into

This paper reports our investigation of wireless communication performance obtained using orbital angular momentum (OAM) multiplexing, from theoretical evaluation to experimental study. First, we show how we performed a basic theoretical study on wireless OAM multiplexing performance regarding modulation, demodulation, multiplexing, and demultiplexing. This provided a clear picture of the effects of mode attenuation and gave us insight into the potential and limitations of OAM wireless communications. Then, we expanded our study to experimental evaluation of a dielectric lens and end-to-end wireless transmission on 28 gigahertz frequency bands. To overcome the beam divergence of OAM multiplexing, we propose a combination of multi-input multi-output (MIMO) and OAM technology, named OAM-MIMO multiplexing. We achieved 45 Gbps (gigabits per second) throughput using OAM multiplexing with five OAM modes. We also experimentally demonstrated the effectiveness of the proposed OAM-MIMO multiplexing using a total of 11 OAM modes. Experimental OAM-MIMO multiplexing results reached a new milestone for point-to-point transmission rates when 100 Gbps was achieved at a 10-m transmission distance.

scholarly journals Orbital Angular Momentum (OAM) Mode-Reconfigurable Discrete Dielectric Lens Operating at 300 GHz

2020 ◽  
Vol 10 (5) ◽  
pp. 480-489
Author(s):  
Geng-Bo Wu ◽  
Ka Fai Chan ◽  
Shi-Wei Qu ◽  
Kin Fai Tong ◽  
Chi Hou Chan
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Dielectric Lens

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas

Highly dispersive coupled ring-core fiber for orbital angular momentum modes

2020 ◽  
Vol 117 (19) ◽  
pp. 191101
Author(s):  
Wenpu Geng ◽  
Yiqiao Li ◽  
Yuxi Fang ◽  
Yingning Wang ◽  
Changjing Bao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Core Fiber ◽  
Ring Core
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