本文選題：磁電層合結(jié)構(gòu)　切入點：磁電可調(diào)微波濾波器　出處：《中國計量學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：將復(fù)合磁電材料的逆磁電效應(yīng)應(yīng)用于普通微波器件,既可與傳統(tǒng)磁可調(diào)微波器件一樣通過外加磁場實現(xiàn)高品質(zhì)因子和GHz范圍的頻帶調(diào)節(jié),也可以通過外加電場,實現(xiàn)MHz范圍內(nèi)高精度和快速的頻帶調(diào)節(jié);并且與傳統(tǒng)的濾波器相比功耗低,噪音低,品質(zhì)因子高。因此在移動通信系統(tǒng)和國防平臺下的有源相控陣雷達以及電子戰(zhàn)系統(tǒng)等領(lǐng)域,其具有很大潛力。在器件設(shè)計過程中,改善微帶結(jié)構(gòu)可以提高器件性能,而對T字型微帶結(jié)構(gòu)濾波器的帶通效果最好;此外,曾有學(xué)者提出采用兩塊層合材料能夠拓展帶寬。雖然如此,但均是一旦器件設(shè)計定型,性能也就無法改變。在器件設(shè)計過程中,傳統(tǒng)的研究方法是通過電磁場仿真后做成實物,而這種方法應(yīng)用于磁電可調(diào)器件的設(shè)計過程中時,由于引入了磁電層合結(jié)構(gòu),考慮其復(fù)雜的材料參數(shù)和邊界條件,會造成仿真時間耗時冗長。相對的,曾有學(xué)者提出采用等效電路分析的方法能夠縮短仿真的時間,提高效率更為方便地預(yù)測器件的性能從而降低成本。盡管關(guān)于等效電路的工作持續(xù)進行著,但針對的模型比較單一,對于其他結(jié)構(gòu)類型的器件建模工作還有待開展。針對上面的思考,本文做了以下的研究:首先,針對對T型微帶線磁電可調(diào)微波濾波器,建立了集總等效電路模型。根據(jù)微波傳輸原理和鐵磁共振機理,考慮壓電層電調(diào)等效因子的影響,計算出其在等效為基于單導(dǎo)帶的微波濾波器時的等效電路參數(shù)。同時引入了新的輻射阻抗公式,計算出了等效為基于耦合帶的微波濾波器時對應(yīng)的等效電路參數(shù),建立起磁電雙可調(diào)諧振器的集總等效電路模型,驗證了電路的有效性,預(yù)測出不同尺寸的磁電層合結(jié)構(gòu)以及外加磁場對濾波器的性能以及等效電路集總參數(shù)的影響。其次,針對由多塊磁電層合結(jié)構(gòu)構(gòu)成的直導(dǎo)帶磁電微波器件,根據(jù)鐵磁共振機理和微波傳輸線理論,分別引入RLC串聯(lián)諧振電路和理想變壓器模型表征鐵磁共振效應(yīng)和微帶線與磁電結(jié)構(gòu)的耦合效應(yīng),最終建立起含多塊磁電層合結(jié)構(gòu)的磁場和電場雙可調(diào)直導(dǎo)帶微波器件的普遍集總電路模型,并驗證了其有效性。之后,使用該集總等效電路對濾波器的帶內(nèi)特性和磁、電場調(diào)諧性能進行預(yù)測,發(fā)現(xiàn)應(yīng)用多塊磁電結(jié)構(gòu)的濾波器,既可以拓寬濾波器的帶寬,也可以通過調(diào)節(jié)磁電塊上的外加靜電、靜磁場來調(diào)節(jié)其工作頻段,為新型磁電器件設(shè)計提供理論依據(jù)。最后,采用雙層磁電層合結(jié)構(gòu)并基于微波磁電效應(yīng)和鐵磁共振效應(yīng),結(jié)合磁電可調(diào)單導(dǎo)帶濾波器的帶阻和與耦合帶的帶通性能,設(shè)計了兩種空間耦合結(jié)構(gòu)的功能可選性磁電可調(diào)微波濾波器,不僅繼承磁電可調(diào)微波器件工作頻段可調(diào)諧的優(yōu)點,同時克服現(xiàn)有磁電可調(diào)微波器件濾波性能單一等缺陷,提高了器件的靈活性以及多功能可用性,更適合無線通信中有關(guān)頻段可調(diào)方面的應(yīng)用,具有很大的創(chuàng)新性,在我國的移動以及衛(wèi)星通信等領(lǐng)域有很大的應(yīng)用前景。
[Abstract]:The inverse application of composite magnetoelectric effect of magnetoelectric materials in ordinary microwave devices, with both the traditional magnetic tunable microwave device by applying a magnetic field to achieve high quality factor and the range of GHz band adjustment, can also be realized by external electric field, high accuracy and fast frequency range of MHz regulation; and compared with the traditional filter low power consumption. Low noise, high quality factor. So in the mobile communication system and defense platform under the active phased array radar and electronic warfare system and other fields, which has great potential. In the design process of the device, improve the microstrip structure to improve the performance of the device, and the T type microstrip bandpass filter is the best effect; in addition, there have been researchers have proposed the two pieces of laminated materials to expand the bandwidth. However, but once the device is finalize the design, performance cannot be changed. In the design process of the device, the traditional research This method is through the electromagnetic field simulation made in kind, and this method is applied to the design process of the magnetoelectric transfer device is due to the introduction of the magnetoelectric laminated structure, considering the complex material parameters and boundary conditions, will cause the simulation time consuming. In contrast, some scholars have proposed the method of equivalent circuit analysis to to shorten the simulation time and improve the efficiency is more convenient to predict the performance of the device and reduce the cost. Although the equivalent circuit of the ongoing work, but the model is relatively simple, for other types of device modeling structure remains to be carried out. According to the above consideration, this article has done the following research: first, in view of the T type magnetoelectric tunable microstrip line microwave filters, a lumped equivalent circuit model. According to the principle of microwave transmission and ferromagnetic resonance mechanism, considering the piezoelectric layer electrically adjustable effect factor etc. In effect, calculate the equivalent parameters of the equivalent circuit of microwave filters based on the single band. While introducing a new formula of the radiation impedance, equivalent circuit parameters corresponding to calculate the equivalent coupling with microwave filter based on the established themagnetoelectric can be lumped equivalent circuit model of tuned oscillator, verified the effectiveness of the circuit, predict the different dimensions of magnetoelectric layer structure and magnetic field on the performance of the filter and the equivalent circuit of lumped parameters. Secondly, according to the direct conduction band magnetoelectric microwave devices is composed of a plurality of magnetoelectric laminated structure, according to the ferromagnetic resonance mechanism and microwave transmission line theory, introduced the RLC series coupling the effect of the resonant circuit and ideal transformer model characterization of ferromagnetic resonance and microstrip line and magnetoelectric structure, finally established with multi block magnetoelectric laminated magnetic and electric structure of the double adjustable straight guide Generally lumped circuit model with microwave devices, and to verify its effectiveness. After that, the filter band characteristics and magnetic using the lumped equivalent circuit, electric tuning performance prediction filter, found that application of multi block magnetoelectric structure, can not only broaden the bandwidth of the filter, also can be adjusted by the addition of static magnetic block the static magnetic field to adjust the working frequency, and provide a theoretical basis for the design of a new type of magnetic electric device. Finally, using the double magnetoelectric laminated structure and microwave magnetoelectric effect and ferromagnetic resonance effect based on the combination of magnetoelectric bandstop tunable single conduction band filter and coupling with the band bandpass performance, designed the function of magnetoelectric optional two kinds of spatial coupling structure of tunable microwave filters, not only inherits advantages of magnetoelectric tunable frequency tunable, and overcome the existing magnetoelectric tunable filtering performance of single. It has improved the flexibility and versatile availability of the device, and is more suitable for the application of tunable frequency band in wireless communication. It has great innovation and has great application prospects in mobile and satellite communications in China.

【學(xué)位授予單位】：中國計量學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN61

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