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題名 | 雙耦合微帶線低通濾波器設計=Double Coupled-Line Low-Pass Filter Design |
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作 者 | 林政昇; 曾振東; | 書刊名 | 技術學刊 |
卷期 | 21:1 民95.03 |
頁次 | 頁69-74 |
分類號 | 448.533 |
關鍵詞 | 耦合; 微帶線; 低通; 濾波器; Coupled; Microstrip; Low-pass; Filter; |
語文 | 中文(Chinese) |
中文摘要 | 本文提出雙耦合微帶線低通濾波器的設計,此低通濾波器由兩對耦合微帶線相互連接組合而成。此低通濾波器具有接近截止頻率陡直響應特性、結構簡單、低介入通帶損失與小的電路尺寸之優點。濾波器的特性分析以耦合傳輸線等效模型電路進行,並運用所得之設計公式進行3-dB 截止頻率為2.45 和5.2GHz 低通濾波器設計,電氣特性以電磁軟體 (IE3D) 進行模擬,實際電路以微帶線結構製作。由模擬電路與實際電路之頻率響應驗證本電路設計流程之正確性,結果顯示實際量測與模擬結果具有相當之一致性。 |
英文摘要 | In this paper, we propose a double coupled-line low-pass filter design. The filter consists of two coupled lines connected end-to-end with a common point. The low-pass filter has a sharp slope response near the 3-dB frequency cutoff point, low passband insertion loss, and compact size. The circuit analysis was performed by a coupled transmission line and a T-type equivalent circuit, and the circuit was evaluated by an electromagnetic simulator, IE3D. Two low-pass filters with 3-dB cutoff frequency at 2.45 and 5.2GHz were designed and measured. The measured and simulated results show good agreement in the frequency range from 0.1 to 13GHz. |
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