本論文使用陣列天線為基礎，透過附掛介質天線罩的方式，致力於實現具有 擴散且平頂效果的天線罩設計。主要目標是觀察在 Ku-band 頻段下不同頻率點的 場型變化，其中包括下行（downlink）在 10.7GHz、11.7GHz 和 12.7GHz，以及 上行（uplink）在 14GHz、14.3GHz 和 14.5GHz。
本研究通過利用廣義折射定律的原理以及平面波的特性，設計了一種特殊的 天線罩，即菲涅耳天線罩。這種天線罩的設計旨在改變電磁波的傳播和輻射特 性，從而實現對波束的精確控制和整形。透過這種設計方法，可以期望提高天線 的半功率波束寬（Half Power Beamwidth, HPBW），從而改善通訊系統的訊號傳 輸範圍。在這項研究中，分別為下行和上行設計了專屬的天線罩，以確保在特定 頻段的工作中，天線罩能夠有效地控制波束。

This thesis is based on the array antenna, through the method of adding a dielectric radome, it is dedicated to the design of the radome with spreading and flat top effect. The main objective is to observe the field pattern variations at different frequency points in the Ku-band, including the transmit frequencies of 10.7 GHz, 11.7 GHz, and 12.7 GHz, as well as the receive frequencies of 14 GHz, 14.3 GHz, and 14.5 GHz.
This study employs the principles of Generalized law of refraction and the characteristics of plane waves to design a specialized antenna enclosure known as a Fresnel radome. The design of this radome aims to alter the propagation and radiation characteristics of electromagnetic waves, thereby achieving precise control and shaping of the beam. Through this design approach, an improved half-power beamwidth (HPBW) of the antenna is expected, leading to enhanced signal transmission range in communication systems. Dedicated radomes are designed for both the transmitting and receiving ends in order to ensure effective beam control in specific frequency bands.

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