本研究提出了應用在Ku band低軌道衛星通訊系統之雙極化陣列天線設計，本設計應用情境可用於衛星通訊中上行以及下行之通訊。下行頻段設計於11 GHz ~12 GHz，上行頻段設計於13.75 GHz~14.6 GHz。為了能夠提高增益，本設計將以組成陣列的方式來達到提高增益的效果。上行及下行之2X2陣列天線在θ= 0°時，增益可達到11dBi；4x4陣列天線在θ= 0°時，增益可達到15dBi。
此外，本研究也加入雙極化天線架構，在衛星通訊中，地面設備之天線極化使用了雙極化天線架構，在接收機的設計上，可以將兩個不同極化的訊號分開處理，利用訊號處理的方式得到正確的訊號。
然而，為了因應第五代行動通訊覆蓋面積不足的問題，發展出相位陣列天線架構。有別於傳統機械式轉向，利用相位控制所達到的波束掃描更能夠精準的發射至目標物，也能大幅地降低建置成本。因此，本研究也將8x8陣列天線模擬了利用主動IC對天線進行相位控制，進而達到波束掃描效果，可達到±50°的掃描範圍。

This study proposes a dual-polarization array antenna design applied to the Ku band low-orbit satellite communication system. The application scenario of this design can be used in the uplink and downlink frequency bands of satellite communication. The downlink frequency band is designed from 11 GHz to 12 GHz, and the uplink frequency band is designed from 13.75 GHz to 14.6 GHz. In order to increase the gain, this design will achieve the effect of increasing the gain by forming an array. The Broadside gain of the uplink and downlink 2X2 array antenna can reach 11dBi; the Broadside gain of the 4x4 array antenna can reach 15dBi.
In addition, this paper also adds a dual-polarization antenna architecture. In satellite communication, the antenna polarization of the ground equipment uses a dual-polarization antenna architecture. In the design of the receiver, the signals of two different polarizations can be processed separately. Use signal processing to get the correct signal.
However, in order to solve the problem of insufficient coverage of the fifth generation mobile communication, a phased array antenna architecture has been developed. Different from traditional mechanical steering, the beam scanning achieved by phase control can be more accurately launched to the target, and can also greatly reduce the construction cost. Therefore, this research also simulates the 8x8 array antenna using the active IC to control the phase of the antenna, and then achieve the beam scanning effect, which can reach a scanning range of ±50°.

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