| Autor: |
Hazim, Rafal, Qasem, Nidal, Alamayreh, Ahmad |
| Předmět: |
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| Zdroj: |
Progress in Electromagnetics Research M; 2023, Vol. 118, p93-104, 12p |
| Abstrakt: |
Orbital angular momentum (OAM) is a fundamental characteristic of electromagnetic waves and has gained significant attention in recent years because of its potential applications in various fields of radio and optics. Furthermore, OAM has been proposed as a means to increase the spectral efficiency of wireless communication systems. By encoding multiple independent data streams on different OAM modes of electromagnetic waves, OAM communication systems can increase the amount of information that can be transmitted over a single radio frequency channel. In this paper, we developed a new method for steering the OAM waves using an intelligent reflective surface (IRS) that is suitable for the far field. Specifically, we designed IRS coefficients to reflect and steer different multiplexed modes between different users based on OAM waves by controlling the IRS impedance, which can be varied depending on the beam steering direction. Moreover, we investigated the physical limitations of the IRS by noting the relations between the number of transmitted modes, IRS size, and impedance values in the IRS. Each impedance element in the IRS consists of real and imaginary values, and the negative values in the real part are used as an indication for reaching the physical limit. One suggestion to decrease the negative real values is by using windowing to decrease the beam waist. The proposed method may enable the extended coverage of OAM wireless communication. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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