太赫茲頻段 4×4 側端陣列天線饋入之碟型天線設計

Abstract

本文提出了一種偏置反射器的設計，以增強用於亞太赫茲通信的 4×4 端射天. 線陣列的增益。工作頻率範圍約為 240 GHz 至 310 GHz，涵蓋了 Sub-THz 通信所需的頻率。雖然較高的頻率通常會導致陣列天線的增益增加，但設計的 4×4 線陣列尚未滿足所需的性能標準。在如此高的頻率下，拋物面反射面天線等高增益天線在增強天線增益方面發揮著關鍵作用，適用於長距離和衛星通信。本研究分析了偏置反射器的設計考慮因素和模擬機制，並通過反射器 天線與 4x4 H-pol 端射天線陣列的集成進一步增強。利用混合仿真方法，評估該覆合天 線系統的性能，並使用高頻結構模擬器 (HFSS) 軟件進行驗證。所設計的 偏置反射器在 260GHz 和 300GHz 頻率上將饋源天線的增益提高了 13dB（理論上）。隨後，分別使用數控加工和 3D 打印機制造偏置反射器及其機械支撐結構，並通過測量數據評估反射器的性能並與模擬結果進行比較，以驗證偏置反射器的特性。 所提出的偏置反射器有望在亞太赫茲頻率下實現高增益，並可廣泛用於 6G 應用和其他相關研究。

This paper presents the design of an Offset Reflector aimed at improving the gain of a 4×4 End-fire antenna configuration for Sub-THz communication systems. The frequency range of operation extends approximately from 240 GHz to 310 GHz, covering the necessary frequencies for Sub-THz communication. While higher frequencies generally lead to increased gain for array antennas, the designed 4×4 antenna array has not met the desired performance criteria. At such high frequencies, high-gain antennas like parabolic reflector antennas play a pivotal role in enhancing the gain of antennas, suitable for long-distance and satellite communications. This study analyzes the design considerations and simulation mechanism of offset reflectors, further augmented by integrating the Reflector antenna with a 4x4 H-pol End-Fire Antenna array. Utilizing a hybrid simulation methodology, the performance of this composite antenna system is evaluated, and validation is carried out with the aid of HFSS (High-Frequency Structure Simulator) software. The designed offset reflector boosts the gain of the feed antenna by 13dB(theoretically) over the frequencies at 260GHz and 300GHz. Subsequently, the offset reflector and its mechanical support structure are fabricated using CNC machining and a 3D printer respectively, and the reflector's performance is assessed through measurement data and evaluated alongside simulation results to verify the characteristics of the offset reflector. The proposed offset reflector holds promise for achieving high gain at Sub-THz frequency and can be widely used in 6G applications and other related research.