Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication

Michael Wulff; Lei Wang; Cheng Yang; Christian Schuster

doi:10.1109/AP-S/USNC-URSI47032.2022.9887018

Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication

Michael Wulff, Lei Wang, Cheng Yang, Christian Schuster

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Optimization of antenna arrays is essential to achieve high data rates in modern communication systems. One promising array used in future communication systems is the uniform circular array (UCA) carrying orbital angular momentum (OAM) modes. In a UCA, the array elements are arranged in a circle with uniform angular spacing. The OAM modes are defined by the excitation of an array, i.e. an OAM mode is excited by exciting each element with equal amplitude and a phase increasing linearly around the array. When one OAM mode is excited and another OAM mode is received, this is called inter mode interference (IMI). Within an array this could be caused by a non-symmetrical array structure. In this paper, the IMI of non-symmetrical UCAs operating OAM waves is explored with comparison to the symmetrical UCA. It is shown, that change in geometric deviation along the array can be used to determine the dominant IMI, which allows the prediction of the IMI when designing an OAM array. These predictions are validated using an elliptical array and an array with misaligned elements. Knowledge of the IMI caused by a geometrical deviation can be used in the future to prevent or correct this IMI.

Original language	English
Title of host publication	2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting
Publisher	IEEE
Pages	1976-1977
Number of pages	2
ISBN (Electronic)	9781665496582
DOIs	https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887018
Publication status	Published - 21 Sept 2022
Event	2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting - Denver, United States Duration: 10 Jul 2022 → 15 Jul 2022

Conference

Conference	2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting
Abbreviated title	AP-S/URSI 2022
Country/Territory	United States
City	Denver
Period	10/07/22 → 15/07/22

Keywords

inter mode interference (IMI)
orbital angular momentum (OAM)
uniform circular array (UCA)

ASJC Scopus subject areas

Computer Networks and Communications
Signal Processing
Instrumentation

Access to Document

10.1109/AP-S/USNC-URSI47032.2022.9887018

Cite this

@inproceedings{3ae826af547b43ad9524d80a1803f47c,

title = "Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication",

abstract = "Optimization of antenna arrays is essential to achieve high data rates in modern communication systems. One promising array used in future communication systems is the uniform circular array (UCA) carrying orbital angular momentum (OAM) modes. In a UCA, the array elements are arranged in a circle with uniform angular spacing. The OAM modes are defined by the excitation of an array, i.e. an OAM mode is excited by exciting each element with equal amplitude and a phase increasing linearly around the array. When one OAM mode is excited and another OAM mode is received, this is called inter mode interference (IMI). Within an array this could be caused by a non-symmetrical array structure. In this paper, the IMI of non-symmetrical UCAs operating OAM waves is explored with comparison to the symmetrical UCA. It is shown, that change in geometric deviation along the array can be used to determine the dominant IMI, which allows the prediction of the IMI when designing an OAM array. These predictions are validated using an elliptical array and an array with misaligned elements. Knowledge of the IMI caused by a geometrical deviation can be used in the future to prevent or correct this IMI.",

keywords = "inter mode interference (IMI), orbital angular momentum (OAM), uniform circular array (UCA)",

author = "Michael Wulff and Lei Wang and Cheng Yang and Christian Schuster",

note = "Funding Information: ACKNOWLEGEMENT This work was in part supported by the German Research Foundation (DFG). Publisher Copyright: {\textcopyright} 2022 IEEE.; 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022 ; Conference date: 10-07-2022 Through 15-07-2022",

year = "2022",

month = sep,

day = "21",

doi = "10.1109/AP-S/USNC-URSI47032.2022.9887018",

language = "English",

pages = "1976--1977",

booktitle = "2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting",

publisher = "IEEE",

address = "United States",

}

Wulff, M, Wang, L, Yang, C & Schuster, C 2022, Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication. in 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. IEEE, pp. 1976-1977, 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Denver, Colorado, United States, 10/07/22. https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9887018

TY - GEN

T1 - Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication

AU - Wulff, Michael

AU - Wang, Lei

AU - Yang, Cheng

AU - Schuster, Christian

PY - 2022/9/21

Y1 - 2022/9/21

N2 - Optimization of antenna arrays is essential to achieve high data rates in modern communication systems. One promising array used in future communication systems is the uniform circular array (UCA) carrying orbital angular momentum (OAM) modes. In a UCA, the array elements are arranged in a circle with uniform angular spacing. The OAM modes are defined by the excitation of an array, i.e. an OAM mode is excited by exciting each element with equal amplitude and a phase increasing linearly around the array. When one OAM mode is excited and another OAM mode is received, this is called inter mode interference (IMI). Within an array this could be caused by a non-symmetrical array structure. In this paper, the IMI of non-symmetrical UCAs operating OAM waves is explored with comparison to the symmetrical UCA. It is shown, that change in geometric deviation along the array can be used to determine the dominant IMI, which allows the prediction of the IMI when designing an OAM array. These predictions are validated using an elliptical array and an array with misaligned elements. Knowledge of the IMI caused by a geometrical deviation can be used in the future to prevent or correct this IMI.

AB - Optimization of antenna arrays is essential to achieve high data rates in modern communication systems. One promising array used in future communication systems is the uniform circular array (UCA) carrying orbital angular momentum (OAM) modes. In a UCA, the array elements are arranged in a circle with uniform angular spacing. The OAM modes are defined by the excitation of an array, i.e. an OAM mode is excited by exciting each element with equal amplitude and a phase increasing linearly around the array. When one OAM mode is excited and another OAM mode is received, this is called inter mode interference (IMI). Within an array this could be caused by a non-symmetrical array structure. In this paper, the IMI of non-symmetrical UCAs operating OAM waves is explored with comparison to the symmetrical UCA. It is shown, that change in geometric deviation along the array can be used to determine the dominant IMI, which allows the prediction of the IMI when designing an OAM array. These predictions are validated using an elliptical array and an array with misaligned elements. Knowledge of the IMI caused by a geometrical deviation can be used in the future to prevent or correct this IMI.

KW - inter mode interference (IMI)

KW - orbital angular momentum (OAM)

KW - uniform circular array (UCA)

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EP - 1977

BT - 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting

PB - IEEE

T2 - 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting

Y2 - 10 July 2022 through 15 July 2022

ER -

Inter Mode Interference in Circular Antenna Arrays for Orbital Angular Momentum (OAM) Based Communication

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