Analysis and Optimization of Airy Beams for Resilient Communications and Wireless Power Transfer
(2025) EITM02 20251Department of Electrical and Information Technology
- Abstract
- This thesis investigates the focusing performance and robustness of auto-focusing Airy beams in near-field wireless communication scenarios. Through a combination of simulations using MATLAB (Matrix Laboratory, a numerical computing environment) and full-wave electromagnetic simulations in FEKO (Feldberechnung für Körper mit beliebiger Oberfläche, an electromagnetic solver developed by Altair), this study systematically compares auto-focusing Airy beams, which are formed by the superposition of two Airy beams with opposite main lobe phases, to conventional phase-conjugated beamforming. The results demonstrate that dual Airy beams formed with a discrete number of array elements (instead of a continuous source) can achieve sharp near-field... (More)
- This thesis investigates the focusing performance and robustness of auto-focusing Airy beams in near-field wireless communication scenarios. Through a combination of simulations using MATLAB (Matrix Laboratory, a numerical computing environment) and full-wave electromagnetic simulations in FEKO (Feldberechnung für Körper mit beliebiger Oberfläche, an electromagnetic solver developed by Altair), this study systematically compares auto-focusing Airy beams, which are formed by the superposition of two Airy beams with opposite main lobe phases, to conventional phase-conjugated beamforming. The results demonstrate that dual Airy beams formed with a discrete number of array elements (instead of a continuous source) can achieve sharp near-field focusing and exhibit unique self-healing properties in the presence of obstacles. In particular, Airy beams exhibit strong robustness against obstacles placed within their “silent zone” (a low-energy region between main lobes), maintaining a relatively high field strength around the target focal point. However, even under equal excitation power, the phase-conjugated beam in general achieves a higher field strength at the reference plane around the target focal point.
The thesis further examines the effects of array aperture truncation and focal shift, finding that under certain conditions, Airy beams may outperform phase-conjugated beams, though this advantage is highly conditional and sensitive to array geometry and obstacle placement. Limitations related to discretization of the source (into array elements) and physical realization are also discussed in detail. Finally, the thesis outlines potential directions for future research, including machine learning-based optimization, experimental validation, and the extension to two-dimensional Airy beams. The findings provide new insights into the potential and limitations of Airy beams for robust near-field applications. (Less) - Popular Abstract
- Wireless communications and wireless power transfer technologies play a vital role in enabling modern communication systems, from mobile phones to smart homes. At the core of these systems is the ability to focus electromagnetic waves accurately, even in cluttered or dynamic environments. Traditional beamforming techniques rely on phase control in large-scale antenna arrays, but new types of beams such as the so-called Airy beam have gained attention for their unique self-bending and self-healing properties.
This thesis investigates how Airy beams perform when focusing energy in the radiative near-field, particularly in the presence of obstacles. Through computer simulations, it is found that Airy beams can partially bypass obstacles... (More) - Wireless communications and wireless power transfer technologies play a vital role in enabling modern communication systems, from mobile phones to smart homes. At the core of these systems is the ability to focus electromagnetic waves accurately, even in cluttered or dynamic environments. Traditional beamforming techniques rely on phase control in large-scale antenna arrays, but new types of beams such as the so-called Airy beam have gained attention for their unique self-bending and self-healing properties.
This thesis investigates how Airy beams perform when focusing energy in the radiative near-field, particularly in the presence of obstacles. Through computer simulations, it is found that Airy beams can partially bypass obstacles and maintain a relatively well-focused energy point, whereas conventional beams are more likely to be blocked. This advantage depends on factors such as the size and position of the obstacle.
The research demonstrates that while Airy beams offer promising possibilities for robust communication in complex environments, they also face practical challenges, especially regarding array design and real-world implementation. This work opens up new directions for developing smarter and more resilient wireless systems, potentially enhanced by future advances in artificial intelligence and adaptive antenna technologies. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9211700
- author
- Liu, Zhiqian LU
- supervisor
-
- Buon Kiong Lau LU
- Jiawang Li LU
- organization
- course
- EITM02 20251
- year
- 2025
- type
- H2 - Master's Degree (Two Years)
- subject
- report number
- LU/LTH-EIT 2025-1092
- language
- English
- id
- 9211700
- date added to LUP
- 2025-09-08 11:12:49
- date last changed
- 2025-09-08 11:12:49
@misc{9211700,
abstract = {{This thesis investigates the focusing performance and robustness of auto-focusing Airy beams in near-field wireless communication scenarios. Through a combination of simulations using MATLAB (Matrix Laboratory, a numerical computing environment) and full-wave electromagnetic simulations in FEKO (Feldberechnung für Körper mit beliebiger Oberfläche, an electromagnetic solver developed by Altair), this study systematically compares auto-focusing Airy beams, which are formed by the superposition of two Airy beams with opposite main lobe phases, to conventional phase-conjugated beamforming. The results demonstrate that dual Airy beams formed with a discrete number of array elements (instead of a continuous source) can achieve sharp near-field focusing and exhibit unique self-healing properties in the presence of obstacles. In particular, Airy beams exhibit strong robustness against obstacles placed within their “silent zone” (a low-energy region between main lobes), maintaining a relatively high field strength around the target focal point. However, even under equal excitation power, the phase-conjugated beam in general achieves a higher field strength at the reference plane around the target focal point.
The thesis further examines the effects of array aperture truncation and focal shift, finding that under certain conditions, Airy beams may outperform phase-conjugated beams, though this advantage is highly conditional and sensitive to array geometry and obstacle placement. Limitations related to discretization of the source (into array elements) and physical realization are also discussed in detail. Finally, the thesis outlines potential directions for future research, including machine learning-based optimization, experimental validation, and the extension to two-dimensional Airy beams. The findings provide new insights into the potential and limitations of Airy beams for robust near-field applications.}},
author = {{Liu, Zhiqian}},
language = {{eng}},
note = {{Student Paper}},
title = {{Analysis and Optimization of Airy Beams for Resilient Communications and Wireless Power Transfer}},
year = {{2025}},
}