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微帶雙平衡混頻器的的ADS設計與仿真

時間:2019-04-28 11:24來源:畢業論文
通過ADS對微帶雙平衡混頻器進行設計與仿真。對仿真電路圖進行比較分析,混頻器的輸入三階交調點和輸出三階交調點分別為-37.829dBm和?114.506dBm。輸入駐波比為 1.024。

    摘要混頻器(mixer)是通信系統的重要組成部分,用于在所有的射頻和微波系統進行頻率變換,用于通信接收機,也是頻率合成器等電子設備中的重要組成部分,用混頻器可以實現頻率加、減運算功能。
二極管的伏安特性曲線是非線性的,完全可以利用它作混頻器件。二極管混頻器與三極管相比較,具有動態范圍大,噪聲小,組合頻率分量少,結構簡單和工作頻率高等優點。采用肖特基二極管的混頻電路,工作頻率可高到微波頻段。因此,二極管混頻電路在高質量的各種接收機和測量儀器中得到了廣泛的應用。但是二極管混頻器也有一個重要的缺點,那就是沒有混頻增益(混頻增益要小于1)。相對于單端混頻器,微帶雙平衡混頻器的輸出電流頻譜分量要比單端混頻器小很多,在強信號時,它產生的組合分量也較少。這種混頻器環形管橋,在同樣強的輸入信號下,分到每個管子的信號功率比單管混頻少,因此它的動態范圍也大。此外這種微帶雙平衡混頻器還有抵消本振引入噪聲所產生的中頻噪聲的能力。鑒于雙平衡混頻器的以上優點,通過ADS對微帶雙平衡混頻器進行設計與仿真。對仿真電路圖進行比較分析,混頻器的輸入三階交調點和輸出三階交調點分別為-37.829dBm和−114.506dBm。輸入駐波比為 1.024。lf0050
關鍵詞  雙平衡;ADS;三階交調;微帶巴倫
  Title  The  Microstrip Double Balanced Mixer Design and simulation
  Abstract
Mixer is the important part of the communication systems, used in all of the RF and microwave system for frequency conversion, for communication receiver, frequency synthesizer and other electronic equipment is an important part of the mixer can achieve the frequency, with add, subtract functions. 源¥自%六:維;論-文'網=www.aftnzs.live
Crystal diode, volt-ampere characteristic curve is nonlinear, can use it for mixing device. Mixer diodes and transistors are compared, with large dynamic range, low noise, less combination frequency components, simple structure and high working frequency. The  diode mixer circuit, working frequency can be high to the microwave band. Therefore, diode mixer circuit in the high quality of the various receiver and measuring instrument has been widely used. But the diode mixer also has an important drawback, that is no mixing gain ( mixing gain of less than 1). Compared to a single ended mixer, double balanced mixer output current spectrum component than single ended mixer is much smaller, with a strong signal, it generates less composite component. The mixer using Ring diodes, in the same strong input signals, into each tube signal less than one mixing, so its dynamic range is also a big times. In addition the balanced mixer and offset the vibration into the noise generated by the medium frequency noise. In view of the double balanced mixer of the above advantages, through ADS on the double balanced mixer design and simulation. Comparative analysis on Simulation of circuit diagram, the input of mixer three order  point and the output of the three order point were -37.829dBm and -114.506dBm. The input in Bobbi for 1.024.
    Keywords  Double balanced;ADS ;Three order intermodulation;
Microstrip blun
目    次
摘  要  I
Abstract       II
第1章  緒 論  1
1.1  課題背景及意義     1
1.2  微波混頻器概況     1
1.3  國內外研究現狀 1
1.4  論文主要內容  2 源¥自%六:維;論-文'網=www.aftnzs.live
第2章  設計平臺講述  3
2.1  ADS概述  3
2.2  ADS仿真設計方法       3
2.3  ADS輔助設計功能       3 微帶雙平衡混頻器的的ADS設計與仿真:http://www.aftnzs.live/tongxin/20190428/32756.html

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