以開槽式陣列天線為基礎之收發機實現

Implementation of RF Transceivers in an Active Phased Array Antenna Systems using Tapered Slot Elements

黃廷瑞(Ting-Jui Huang)

指導教授 ： 許恒通

元智大學/電機通訊學院/通訊工程學系/碩士(2011年)

摘要

本研究主要針對陣列天線設計及實現進行探討，主要希望以模組化的方式來建置一陣列天線，並使其可與後端之RF模組整合，使得在未來實務應用時，可以模組化方式去建置一實用的陣列天線系統。具體實現規劃則以模組化之方式結合1X8的陣列天線單元配合後端RF電路成為一套模組，並透過相位的變化來達成波束掃描的效果。
基於系統整體收發機模組測試便利性之考量，目前於接收端部分以四組1X8之不同相位陣列搭配一對四的切換開關作為波束切換單元，其後利用低雜訊放大器加上混頻電路將射頻訊號降至中頻2.4GHz，最後接收訊號直接饋入儀器VN6000進行處理。反之在發射端部分則由中頻輸入一調變訊號經混頻器升頻道12.45GHz後透過功率放大器至發射天線，其中發射天線係以1X8陣列天線形成，主要希望在發射端可以產生較窄之波束以便測試接收端波束掃描之功能。有關整體收發機之組成與系統功能性測試細節，包含抑制陣列天線後向輻射之具體方法，均將在本論文中討論。

關鍵字

開槽式天線 ； 收發機

並列摘要

The main objective of this research focused on the development of antenna array design technologies intended for active phased array antenna systems. Modular approach for sub-array designs was adopted to provide an efficient way for building a practical antenna array system with large number of elements. For practical implementation, each sub-array with 8 basic units was fabricated on a printed circuit board to integrate with RF transceivers and formed a basic module. Necessary phase shifts for corresponding sub-arrays were also applied to realize beam-steering effect required by the system.
For the convenience of system performance test, the beam switching block of the receiver consisted of 4 sub-arrays (each 1-by-8) with various phase shifts connected through SPQT switches. The RF front end consisted of low noise amplifier in series with a mixer to down convert the frequency to 2.4GHz. The down converted signal was then fed into VN6000 for baseband processing. On the contrary, at the transmitting side, IF modulated signal was fed through mixer and up-converted to 12.45 GHz to be amplified by power amplifier for transmission by the antenna arrays. 1-by-8 antenna array was used as the transmitting antenna such that the beamwidth of the transmitted signals can be narrow which makes it easy to verify the beam-switching performance at the receiver. Details for practical implementation in system level together with possibe solutions in the suppression of backlobes will be discussed in detail in the thesis.

並列關鍵字

TSA ； taper slot antenna

參考文獻

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