Digital coding metamaterials with multi-modulation schemes and beam steering for intra-chip millimeter-wave connectivity.

Abstract

In modern wireless communication systems, data transmission is achieved through the collaboration of digital modulation circuits and antennas. Digital baseband signals are first modulated in terms of amplitude, frequency, and phase of the carrier wave and then transmitted directionally via antennas. However, in intra-chip environments, the performance of on-chip antennas is fundamentally constrained by micro-fabrication and integration requirements. As a result, these antennas often exhibit low gain and efficiency and are susceptible to interference among closely spaced transmission channels. To address these limitations, we propose a digital coding metamaterial for direct signal modulation within intra-chip wireless channels, providing an alternative solution to achieve directional signal delivery without depending on the antenna's intrinsic radiation pattern. The proposed metamateiral can directly convert digital control inputs into discrete phase shifts of a 70 GHz TE-mode surface wave, enabling post-radiation modulation as the electromagnetic wave propagates through the metamaterial. When combined with a single broadcast antenna, multiple metamaterial units can perform simultaneous, multi-directional modulation and transmissions. The proposed metamaterial supports various phase shift modulation schemes, including BPSK, QPSK, and 8-PSK. Furthermore, it enables hybrid modulation and beam steering modes, offering a beam steering range of up to [Formula: see text]. The proposed metamateiral presents an innovative method for information routing in intra-chip transmission, helps reduce signal crosstalk under parallel transmission, and expands wireless channel capacity and spectral efficiency.

AI evidence extraction

Main findings

The paper proposes a digital coding metamaterial that converts digital control inputs into discrete phase shifts of a 70 GHz TE-mode surface wave, enabling post-radiation modulation as the wave propagates through the metamaterial. With a single broadcast antenna and multiple metamaterial units, it supports simultaneous multi-directional modulation/transmission, multiple PSK schemes, and hybrid modulation/beam steering, and is described as helping reduce crosstalk and expand channel capacity/spectral efficiency.

Outcomes measured

• Intra-chip millimeter-wave connectivity performance
• Directional signal delivery / beam steering
• Phase-shift modulation capability (BPSK, QPSK, 8-PSK)
• Signal crosstalk reduction under parallel transmission
• Wireless channel capacity and spectral efficiency

Suggested hubs

• 5g-policy (0.1)
  Mentions millimeter-wave (70 GHz), but the work is intra-chip connectivity rather than telecom policy.

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    "exposure": {
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        "source": "other",
        "frequency_mhz": 70000,
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    },
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    "outcomes": [
        "Intra-chip millimeter-wave connectivity performance",
        "Directional signal delivery / beam steering",
        "Phase-shift modulation capability (BPSK, QPSK, 8-PSK)",
        "Signal crosstalk reduction under parallel transmission",
        "Wireless channel capacity and spectral efficiency"
    ],
    "main_findings": "The paper proposes a digital coding metamaterial that converts digital control inputs into discrete phase shifts of a 70 GHz TE-mode surface wave, enabling post-radiation modulation as the wave propagates through the metamaterial. With a single broadcast antenna and multiple metamaterial units, it supports simultaneous multi-directional modulation/transmission, multiple PSK schemes, and hybrid modulation/beam steering, and is described as helping reduce crosstalk and expand channel capacity/spectral efficiency.",
    "effect_direction": "unclear",
    "limitations": [],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "digital coding metamaterial",
        "intra-chip wireless",
        "millimeter-wave",
        "70 GHz",
        "TE-mode surface wave",
        "beam steering",
        "BPSK",
        "QPSK",
        "8-PSK",
        "post-radiation modulation",
        "crosstalk",
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        {
            "slug": "5g-policy",
            "weight": 0.1000000000000000055511151231257827021181583404541015625,
            "reason": "Mentions millimeter-wave (70 GHz), but the work is intra-chip connectivity rather than telecom policy."
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}

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