Near-field MIMO communication utilizing both electric and magnetic field components

Nikravan, M. A.; Kwon, Do-Hoon; Schantz, H.G.; Unden, Alfred H.

doi:10.1109/aps.2014.6904568

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…For our purposes in this paper, the exact details of the equalizer design are irrelevant to the main subject (and can always be dealt with in more specialized papers elsewhere), so we assume that an ideal equalizer has been constructed and applied to the Rx signal i rx (t) in Eq. (24), leading to the equalized signal…”

Section: Digital Receiver Designmentioning

confidence: 99%

“…The recent interest in electromagnetic near fields has pushed researchers to investigate alternative theoretical [20][21][22][23], experimental [20,24,25], and computational [20,[26][27][28][29][30] tools capable of realizing and demonstrating new dimensions and devices in engineering electromagnetics, and hence the motivation behind this work aiming at reexamining the usual views on antennas by exploiting the subtle but often neglected relation between space and time in radiation problems. In this paper, we follow Harmuth's suggestion to work with nonsinusoidal antennas completely in the time domain, avoiding using frequency-domain concepts as much as possible.…”

Section: Introductionmentioning

confidence: 99%

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Theory of Nonsinusoidal Small Antennas for Near-Field Communication System Analysis

Mikki¹

2020

PIER B

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We provide a conceptual and theoretical analysis of nonsinusoidal antennas with emphasis on how electromagnetics and communication theories can be integrated to propose ideas for near-field (NF) communications systems utilizing future antennas. It is shown through rigorous analysis that in nonsinusoidal antennas it is possible to derive and solve ordinary differential equations giving specialized time-domain excitation signals that lead to exact cancellation of the near field at specific radiation spheres. This opens the door to building NF communications systems with far-field-like communication receiver infrastructures utilized if the receive antenna is placed at the special sphere where the NF component is made to vanish. We deploy exact current Green's function analysis method and completely avoid the use of any frequency-domain method. Complete expressions of the electromagnetic near-and far-field contributions to all signals propagating from the source to the receiver are then derived and their physical content discussed. The distortion effects and signal-to-noise rations due to the near-field are also identified and derived theoretically. It is found that using this specialized pulse excitation method in nonsinusoidal antennas, distortion caused by near-field components can be eliminated at critical distances between the source and the receiver. Realization issues of this system are briefly discussed together with some potential applications.

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Section: Digital Receiver Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theory of Nonsinusoidal Small Antennas for Near-Field Communication System Analysis

Mikki¹

2020

PIER B

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“…The recent interest in electromagnetic near fields has pushed researchers to investigate alternative theoretical [21-23, 23, 24], experimental [21,25,26], and computational [21,[27][28][29][30][31] tools capable of realizing and demonstrating new dimensions and devices in engineering electromagnetics, and hence the motivation behind this work aiming at reexamining the usual views on antennas by exploiting the subtle but often neglected relation between space and time in radiation problems. In this paper, we follow Harmuth's suggestion to work with nonsinusoidal antennas completely in the time domain, avoiding as much as possible using frequency-domain concepts.…”

Section: Introductionmentioning

confidence: 99%

Theory of Nonsinusoidal Small Antennas with Applications to Near-Field Communication System Analysis and Design

Mikki¹

2020

Preprint

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“…The near field MIMO offers less propagation loss and high energy efficiency due to near field electromagnetic coupling since the distance between transmitting and receiving antennas is shorter than the wavelength [3,4]. However, the impedances of the antennas are seriously affected by other antennas as well as their feed networks in the near field situation.…”

Section: Introductionmentioning

confidence: 99%

Design of matching networks based on image impedances for near field MIMO

2015

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This paper proposes matching method based on image impedances for near field MIMO. In this letter, matching method, which can realize matching of all port at the same time by extending image impedances theory, is proposed. Numerical analysis and experimental results demonstrate the proposed matching method is effective in enhancing the channel capacity of the near field MIMO, where facing antennas strongly couple to each other.

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Near-field MIMO communication utilizing both electric and magnetic field components

Cited by 3 publications

References 5 publications

Theory of Nonsinusoidal Small Antennas for Near-Field Communication System Analysis

Theory of Nonsinusoidal Small Antennas for Near-Field Communication System Analysis

Theory of Nonsinusoidal Small Antennas with Applications to Near-Field Communication System Analysis and Design

Design of matching networks based on image impedances for near field MIMO

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