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<p>A system-level modeling and robustness evaluation framework is developed for broadband sub-THz photonic beamforming transmitters intended for wideband wireless communications in the 220–330&#xa0;GHz band. The framework integrates optical true-time-delay control, optical-to-THz conversion, RF non-idealities, and antenna radiation characteristics into a unified parameterized model for practical system-level evaluation. Based on full-wave electromagnetic results and subsystem-level parameter extraction, the impacts of delay error, conversion-efficiency variation, RF amplitude/phase mismatch, and antenna-gain deviation are quantified in a consistent manner. Under the adopted equivalent-model assumptions, the results indicate that the considered architecture can maintain a beam-pointing error below 1.5° and channel isolation above 25 dB across the operating band, while reducing broadband beam squint relative to phase-controlled beamforming. The Monte Carlo analysis gives an estimated system yield of 92.5% for the assumed independent parameter perturbations. These results suggest that the proposed framework can support early-stage system design, performance evaluation, and robustness assessment of broadband sub-THz photonic beamforming transmitters.</p>

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System-level modeling and robustness evaluation of broadband sub-THz photonic beamforming transmitters

  • 期刊论文

  • 发表日期：

    2026年6月30日

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  • De-Yong Li,
  • Wei Wang

摘要

A system-level modeling and robustness evaluation framework is developed for broadband sub-THz photonic beamforming transmitters intended for wideband wireless communications in the 220–330 GHz band. The framework integrates optical true-time-delay control, optical-to-THz conversion, RF non-idealities, and antenna radiation characteristics into a unified parameterized model for practical system-level evaluation. Based on full-wave electromagnetic results and subsystem-level parameter extraction, the impacts of delay error, conversion-efficiency variation, RF amplitude/phase mismatch, and antenna-gain deviation are quantified in a consistent manner. Under the adopted equivalent-model assumptions, the results indicate that the considered architecture can maintain a beam-pointing error below 1.5° and channel isolation above 25 dB across the operating band, while reducing broadband beam squint relative to phase-controlled beamforming. The Monte Carlo analysis gives an estimated system yield of 92.5% for the assumed independent parameter perturbations. These results suggest that the proposed framework can support early-stage system design, performance evaluation, and robustness assessment of broadband sub-THz photonic beamforming transmitters.