In this letter, we address the issue of beam-squinting encountered in ultra-wideband millimeter wave mobile communication systems. First, the beam-squinting effects on the antenna array gain and the usable bandwidth of these systems are analyzed. The obtained results show that, in ultra-wideband communication systems, beam-squinting causes loss in array gain and limits the achievable capacity. To mitigate these effects, a new analog architecture design, that improves the array gain and the achievable capacity, is proposed. The proposed architecture is most suitable for delay-sensitive or computational power constrained applications and does not require the computation of any compensation matrix in the digital domain. In addition, the exact expression for the array gain of the proposed analog architecture is derived. To further simplify the evaluation of the system performance, an approximated closed-form expression for the array gain is derived. Furthermore, to evaluate the performance of the proposed design, rigorous numerical results concerning different system parameters are provided in this letter.

中文翻译：

---

使用新型模拟架构设计提高超宽带毫米波系统的天线阵列增益和容量

在这封信中，我们解决了超宽带毫米波移动通信系统中遇到的光束偏斜问题。首先，分析了波束偏斜对天线阵列增益和这些系统的可用带宽的影响。得到的结果表明，在超宽带通信系统中，光束偏斜会导致阵列增益损失并限制了可实现的容量。为了减轻这些影响，提出了一种新的模拟架构设计，以提高阵列增益和可实现的容量。所提出的架构最适合延迟敏感或计算能力受限的应用，并且不需要在数字域中计算任何补偿矩阵。此外，还推导出了所提出的模拟架构的阵列增益的精确表达式。为了进一步简化对系统性能的评估，导出了阵列增益的近似闭式表达式。此外，为了评估所提出的设计的性能，在这封信中提供了有关不同系统参数的严格数值结果。