Abstract
Beamforming, namely exciting properly a set of sources whose collective radiation mimics a given pattern, is an inherently inverse problem. Since the inverse design methods are recently being introduced in photonic systems leading to devices of unprecedented efficiency, we reconsider beamforming in this context. Accordingly, flawless beam-shaping is reported for the simple case of multiple emitters placed along a line. The key parameter to fulfill such an objective is the distance between two consecutive antennas which should obey an approximate inequality, securing both diversity and coherence for the emitting patterns. This condition cannot be attained when infinite directivity is demanded; however, ultra-narrow radiation lobes are developed for the suitable, inversely-determined excitations.
| Original language | English |
|---|---|
| Title of host publication | Physics and Simulation of Optoelectronic Devices XXVII |
| Editors | Marek Osinski, Bernd Witzigmann, Yasuhiko Arakawa |
| Publisher | SPIE |
| ISBN (Electronic) | 9781510624665 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
| Event | Physics and Simulation of Optoelectronic Devices XXVII 2019 - San Francisco, United States Duration: Feb 5 2019 → Feb 7 2019 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 10912 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | Physics and Simulation of Optoelectronic Devices XXVII 2019 |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 2/5/19 → 2/7/19 |
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Keywords
- Antenna directivity
- Beamforming
- Inverse design
- Laser emitters
- Phased array.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Revisiting beamforming under the prism of inverse methods. / Valagiannopoulos, Constantinos; Kovanis, Vassilios.
Physics and Simulation of Optoelectronic Devices XXVII. ed. / Marek Osinski; Bernd Witzigmann; Yasuhiko Arakawa. SPIE, 2019. 109120Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10912).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Revisiting beamforming under the prism of inverse methods
AU - Valagiannopoulos, Constantinos
AU - Kovanis, Vassilios
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Beamforming, namely exciting properly a set of sources whose collective radiation mimics a given pattern, is an inherently inverse problem. Since the inverse design methods are recently being introduced in photonic systems leading to devices of unprecedented efficiency, we reconsider beamforming in this context. Accordingly, flawless beam-shaping is reported for the simple case of multiple emitters placed along a line. The key parameter to fulfill such an objective is the distance between two consecutive antennas which should obey an approximate inequality, securing both diversity and coherence for the emitting patterns. This condition cannot be attained when infinite directivity is demanded; however, ultra-narrow radiation lobes are developed for the suitable, inversely-determined excitations.
AB - Beamforming, namely exciting properly a set of sources whose collective radiation mimics a given pattern, is an inherently inverse problem. Since the inverse design methods are recently being introduced in photonic systems leading to devices of unprecedented efficiency, we reconsider beamforming in this context. Accordingly, flawless beam-shaping is reported for the simple case of multiple emitters placed along a line. The key parameter to fulfill such an objective is the distance between two consecutive antennas which should obey an approximate inequality, securing both diversity and coherence for the emitting patterns. This condition cannot be attained when infinite directivity is demanded; however, ultra-narrow radiation lobes are developed for the suitable, inversely-determined excitations.
KW - Antenna directivity
KW - Beamforming
KW - Inverse design
KW - Laser emitters
KW - Phased array.
UR - http://www.scopus.com/inward/record.url?scp=85065755955&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065755955&partnerID=8YFLogxK
U2 - 10.1117/12.2509452
DO - 10.1117/12.2509452
M3 - Conference contribution
AN - SCOPUS:85065755955
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Physics and Simulation of Optoelectronic Devices XXVII
A2 - Osinski, Marek
A2 - Witzigmann, Bernd
A2 - Arakawa, Yasuhiko
PB - SPIE
ER -