本文選題：回旋行波管 + 極化扭轉(zhuǎn)��； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：回旋行波管具有寬頻帶、高功率、高增益、高效率等優(yōu)點,在通信、雷達(dá)、電子戰(zhàn)方面應(yīng)用前景廣泛,備受國內(nèi)外學(xué)者的關(guān)注。但是,回旋行波管的工作模式通常為TE0n模式,不適合遠(yuǎn)距離傳輸和直接應(yīng)用,必須將其轉(zhuǎn)換成單一線極化的HE11模式或者高斯波束。在寬頻帶下,實現(xiàn)這一轉(zhuǎn)換是推進(jìn)毫米波回旋放大器應(yīng)用的重要技術(shù)前提。本論文針對基于反射式金屬光柵結(jié)構(gòu)的寬帶大功率模式變換器開展了深入的理論和實驗研究。主要工作內(nèi)容如下:1.開展了平面周期結(jié)構(gòu)的模匹配理論研究,推導(dǎo)出反射式金屬光柵的端面模匹配方程,編制了相應(yīng)的光柵特性參數(shù)分析程序。并利用電磁仿真軟件,對編制的數(shù)值分析程序進(jìn)行仿真驗證。2.利用編制的數(shù)值計算程序,對反射式矩形光柵的色散特性開展研究。推導(dǎo)出TE01模極化扭轉(zhuǎn)光柵曲線分布方程,完成W波段圓波導(dǎo)TE01模極化扭轉(zhuǎn)光柵設(shè)計。仿真計算結(jié)果表明85GHz到105GHz頻帶范圍內(nèi),經(jīng)極化扭轉(zhuǎn)光柵后,波束線極化純度高于97%。3.開展相位修正技術(shù)研究,詳細(xì)推導(dǎo)了相位修正反射鏡的Katsenelenbaum Semenov算法(KSA),設(shè)計了相應(yīng)的相位修正鏡面,并對W波段寬帶TE01-HE11模式變換器進(jìn)行了整體仿真。計算結(jié)果表明:在85GHz-105GHz內(nèi)(相對帶寬范圍為21.2%),輸出HE11模標(biāo)量模式純度均大于95%,矢量模式純度大于92%。其中在98GHz模式純度最高,最高標(biāo)量純度為97.9%,最高矢量純度97.28%。4.配合實驗研究的需求,研制了W波段寬帶TE01模激勵器。搭建了相應(yīng)的測試平臺,完成了寬帶模式變換器的實驗研究。實驗結(jié)果表明:在85GHz-105GHz的范圍內(nèi)(相對帶寬范圍為21.2%),寬帶模式變換器輸出波束HE11模標(biāo)量純度均大于95%,其中在98GHz時,輸出波束的HE11模式標(biāo)量純度達(dá)到97.67%。在90GHz-100GHz的范圍內(nèi)(相對帶寬為10.6%),總轉(zhuǎn)換效率高于86%。
[Abstract]:Gyrotron TWT has the advantages of wide band, high power, high gain and high efficiency. It has a wide application prospect in communication, radar and electronic warfare, and has attracted the attention of scholars at home and abroad. However, the working mode of gyrotron is usually TE0n mode, which is not suitable for long distance transmission and direct application. It must be converted into single line polarized HE11 mode or Gao Si beam. This conversion is an important technical prerequisite for the application of millimeter wave cyclotron amplifier in wide band. In this paper, a deep theoretical and experimental study on wideband high power mode converter based on reflective metal grating structure is carried out. The main work is as follows: 1. In this paper, the mode matching theory of planar periodic structure is studied, and the equation of end-face mode matching of reflective metal grating is deduced, and the corresponding program for analyzing the characteristic parameters of the grating is compiled. And using electromagnetic simulation software, the numerical analysis program compiled by simulation. 2. 2. The dispersion characteristics of reflective rectangular grating are studied by using the numerical calculation program. The curve distribution equation of TE01 mode polarization torsion grating is deduced and the W band circular waveguide TE01 mode polarization torsion grating is designed. The simulation results show that in the range of 85GHz to 105GHz, the polarization purity of the beam line is higher than 97. 3 after the polarization torsion grating. The phase correction technique is studied, the Katsenelenbaum Semenov algorithm of the phase correction mirror is deduced in detail, the corresponding phase correction mirror is designed, and the W-Band broadband TE01-HE11 mode converter is simulated as a whole. The results show that in 85GHz-105GHz (relative bandwidth range is 21.2g), the purity of scalar mode of output HE11 is greater than 95, and the purity of vector mode is greater than 922. Among them, the purity of 98GHz is the highest, the highest purity of scalar is 97.99.The highest purity of vector is 97.28.4. A W band wide band TE01 mode exciter is developed to meet the needs of experimental research. The corresponding test platform is built, and the experimental research of broadband mode converter is completed. The experimental results show that in the range of 85GHz-105GHz (relative bandwidth is 21.2g), the HE11 mode scalar purity of the output beam of the wideband mode converter is greater than 95. In the case of 98GHz, the purity of the HE11 mode scalar of the output beam reaches 97.67. In the range of 90GHz-100GHz (relative bandwidth is 10.6), the total conversion efficiency is higher than 86.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN624

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李志良;馮進(jìn)軍;劉本田;王峨鋒;曾旭;;國際熱核聚變裝置用回旋管的現(xiàn)狀及技術(shù)分析[J];真空電子技術(shù);2012年02期

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本文編號：1850042