多輸入多輸出天線系統隔離度之研究

本研究利用雜訊抑制材料來達到多輸入多輸出天線系統隔離的效果，天線製作於尺寸為50x35x1.6mm3的FR4基板上，多輸入多輸出天線為兩個半徑4mm的圓盤超寬頻天線，兩天線相距9.5mm。研究結果顯示不同覆蓋面積及位置對天線隔離度有不同的影響，然而隔離度越好，輻射效率也會變差，實驗結果驗證此一部分。本研究之抑制效果，S21都能抑制在-20dB以下，並且在6~8GHz會有一個較好的抑制效果，但是對於效率而言在8~10GHz需要進一步改善。

關鍵字

多輸入多輸出；超寬頻天線；雜訊抑制材料；隔離度

並列摘要

The noise suppression materials are adopted to enhance the isolation of multi-input multi-output antenna (MIMO) systems. The MIMO antennas are two ultra-wideband antennas which are fabricated on the FR4 substrate with the dimension of 50x35x1.6mm3. The radius of the disk type antenna is 4 mm and the separation distance between these two antennas is 9.5 mm. The area and position of the noise suppression materials play an important role on the isolation of two antennas. However, better isolation between the two antennas results in lower efficiency which is verified by the experiments. There is a better suppression in the frequency range between 6~8GHz and the isolation S21 is greater than 20 dB but the efficiency in the frequency range between 8~10GHz needs to be improved in this study.

並列關鍵字

Multi-input multi-output ； ultra-wideband antenna ； noise suppression

參考文獻

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[2] R. Anitha, V.P. Sarin, P. Mohanan and K. Vasudevan Enhanced isolation with defected ground structure in MIMO antenna ELECTRONICS LETTERS 20th November 2014 Vol. 50 No. 24 pp. 1784–1786

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[10] J. Liang, L. Guo, C.C. Chiau, X. Chen and C.G. Parini “Study of CPW-fed circular discmonopole antenna forultra wideband applications” IEE Proc.-Microw. Antennas Propag., Vol. 152, No. 6, December 2005Pages: 520 - 526

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國際替代計量

多輸入多輸出天線系統隔離度之研究

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