Despite the great progress in data transmission systems using dielectric waveguides (DWGs) in the millimeter-wave (mm-wave) frequency band (30–300 GHz), the signal distortions caused by DWGs have not yet been fully understood. However, such investigations would help to optimize DWGs as a transmission channel in order to further increase data rate and transmission distance of such systems without the need for more complex transceivers. Therefore, this paper presents a detailed study of the expected signal distortions caused by frequency-dependent attenuation and frequency-dependent group delay of circular DWGs at mm-wave frequencies. Based on a low-complexity digital transmission system, the effects of DWGs on the signal-to-noise ratio and the intersymbol interference at the receiver are evaluated. The figures and equations given in this paper allow the reader to easily calculate the channel properties and signal distortions for a wide range of circular DWGs without the need of finite element method solver or other time-consuming numerical simulations. Finally, design recommendations are given to minimize signal distortions for transmitting signals along DWGs.

中文翻译：

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毫米波频率下圆形介质波导中的信号失真

尽管在毫米波 (mm-wave) 频段 (30-300 GHz) 中使用介电波导 (DWG) 的数据传输系统取得了巨大进展，但 DWG 引起的信号失真尚未完全了解。然而，此类研究将有助于优化 DWG 作为传输通道，以进一步提高此类系统的数据速率和传输距离，而无需更复杂的收发器。因此，本文详细研究了由毫米波频率下圆形 DWG 的频率相关衰减和频率相关群延迟引起的预期信号失真。基于一个低复杂度的数字传输系统，评估了 DWG 对接收端信噪比和符号间干扰的影响。本文中给出的图形和方程使读者能够轻松计算各种圆形 DWG 的通道特性和信号失真，而无需有限元方法求解器或其他耗时的数值模拟。最后，给出了设计建议，以尽量减少沿 DWG 传输信号的信号失真。