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題名 | Development of an Electro-Optical System for Enhancing the Accuracy in Antenna and EMC Measurements=以光電傳輸系統提高天線及電磁相容量測的準確性 |
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作者 | 饒瑞榮; 梁文烈; 陳永盛; 唐震寰; | 書刊名 | 國立臺灣大學工程學刊 |
卷期 | 95 民94.10 |
頁次 | 頁23-28 |
專輯 | 電信工程專輯 |
分類號 | 448.81 |
關鍵詞 | 電光調制器; 光纖; 亞鐵鹽串珠; 天線量測; Electro-optical modulator; Optic fiber; Ferrite bead; Antenna and EMC measurements; |
語文 | 英文(English) |
中文摘要 | 一般的天線或電磁相容量測系統在進行量測時,受測的電磁場很容易受到連接於接收天線輸出端的信號傳輸線所影響。即使以亞鐵鹽串珠串接於信號傳輸線上,也只能降低量測頻率低於數百MHz時的影響,當量測頻率接近GHz頻段時,則無明顯的效果。為改善此一問題,我們設計了一套高穩定性的光電傳輸系統,用以取代一般電磁場量測系統的同軸傳輸線,作為電磁場信號的傳輸。此一光電傳輸系統在50MHz至1GHz頻率範圍中工作時,其穩定性優於0.2dB。以此光電傳輸系統取代傳統信號傳輸線後,可以有效的降低信號傳輸線對電磁場的干擾影響。在所執行的比較量測中,結果顯示此系統對於降低電磁場的干擾影響,可以達到11%以上的改善,進而可以提高量測的準確性。 |
英文摘要 | The traditional antenna and EMC measurements are sensitive to the set-up of the RF connecting cable between the receiving antenna and the receiver. The use of ferrite beads on the RF cable may reduce the field disturbance caused by the RF cable for the frequency lower than few hundred MHz. However, significant signal strength variation is still observed when the frequency is increased to one GHz. In this paper, an electro-optical system is designed for replacing the RF connecting cable, which yields a high performance of signal strength variation smaller than 0.2dB for the frequency range from 50MHz to 1GHz. An excellent work is done on an E-O modulator design to achieve the system performance. With the proposed system, the disturbance of the received electromagnetic field due to the connecting cables is reduced more than 11%, thus it enhances the measurement accuracy. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。