臺灣博碩士論文加值系統

本論文主要在研製微帶線波導結構的寬頻1.4GHz到2.2GHz及2.6到4.0GHz帶通濾波器，在此我們利用ADS軟體去設計濾波器，在設計及模擬完成後，我們利用曝光顯影的方式實踐兩種微帶線波導結構的寬頻帶通的濾波器，1.4GHz 到2.2GHz及2.6到4.0GHz。濾波器依頻率響應可分為：(1)低通濾波器(2)高通濾波器(3)帶通濾波器與帶止濾波器。本論文僅針對其中的帶通濾波器進行研究，
依電路需求不同，對帶通濾波器設計者而言亦有不同之考量。分散式電路具有較優越之效能，但在低頻頻段時，電路面積卻仍顯過大。以積體電路設計的觀點，面積即為金錢。 因此，電路微型化是必然之趨勢。我們所設計的頻帶為1.4GHz 到2.2GHz及 2.6 到4.0GHz，主要應用在訊號產生器。同時，在較低頻段(1.4GHz 到2.2GHz)的設計，我們使用hairpin line 結構來縮短其尺寸。
使用在訊號產生器時，經由倍頻器再透過研製的濾波器輸出，在抑制度上都有明顯的改善。量測結果如下:在兩倍頻輸出為1.4GHz~2.4GHz時，基頻的抑制度為-37dBc±3dB而三倍頻的抑制度為-32.5dBc±7dB；在四倍頻輸出頻率為2.6GHz~3.6GHz時，三倍頻的抑制度為-31.3dBc±8dB而五倍頻的抑制度為-19.4dBc±7dB。

The main focus this thesis proposes microstrip waveguide structure wide-band(WB) (1.4GHz to 2.2GHz and 2.6 to 4.0GHz) band-pass filter(BPF). Here ,we use ADS software to design filters .After finishing design and simulation, we use photo-lithography to implement two kinds of WB microstrip band-pass filters 1.4GHz to 2.2GHz and 2.6 to 4.0GHz. According to frequency response, filters can be divided into: (1) low-pass filter, (2) high-pass filter, (3) band-pass filter and band-stop filter. This paper only chooses band-pass filters for research.
According to different circuit requirements, the BPF designer has different consideration. Distributed circuit has superior performance, but its circuit area is too large in the low frequency band . From the point of view of IC design, area is money. Thus, miniaturization of the circuit is the inevitable trend .The bands we have designed are1.4 to 2.2GHz and 2.6 to 4.0GHz, which are mainly applied to signal generator. Meanwhile, we use hairpin line structure in the low band BPF of 1.4 to 2.2GHz to reduce its size.
Via doubler module and our filters, the rejection of output has obvious improvement in the application of signal generators. The measured results are as follows: In the output of 1.4GHz~2.4GHz, the rejection of fundamental is -37dBc±3dB and that of triple frequency is -32.5dBc±7dB；In the output of 2.6GHz~3.6GHz, the rejection of triple frequency is -31.3dBc±8dB and that of penta-frequency is -19.4dBc±3dB。

目錄.................................................................I
圖表目錄.............................................................I
第一章 緒論.........................................................1
1.1研究動機.......................................................1
1.2ADS模擬軟體介紹.................................................2
第二章 濾波器基本原理介紹..............................................3
2.1基本形式..................................................3
2.2響應特性..................................................4
2.3濾波器介紹.................................................5
2.4濾波器損耗分析..................................................6
2.5濾波器原型.....................................................9
2.6柴比雪夫濾波器.....................................................10
2.7低通濾波器轉帶通濾波器......................................14
第三章 微帶線濾波器....................................................16
3.1微帶線基本特性...................................................16
3.2微帶線濾波器種類................................................18
3.3平行耦合微帶線的種類............................................19
3.4散射傳遞參數-應用於微帶線濾波器之設計...........................21
第四章 濾波器設計...........................................................24
4.1 平行耦合帶通濾波器之設計....................................24
4.2 2.6GHz~4.0GHz微帶線的設計.........................................29
4.3 Hairpin耦合帶通濾波器的設計................................32
第五章 實際應用及其量測結果..................................................37
5.1實際應用介紹......................................................37
5.2 1.4GHz到2.2GHz帶通濾波器量測....................................40
5.3 2.6GHz到4.0GHz帶通濾波器量測...................................43
第六章 結論.................................................................46
參考文獻...................................................47
附錄..................................................................48

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