本文選題：微波單層片式陶瓷電容 + 諧振頻率　； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：微波介質(zhì)陶瓷是近幾十年才發(fā)展起來的一類新型的電子材料,是國(guó)內(nèi)外近年來對(duì)微波介質(zhì)材料研究領(lǐng)域內(nèi)的熱點(diǎn)方向,它被廣泛應(yīng)用于通信領(lǐng)域的很多方面,特別是移動(dòng)通信系統(tǒng)中。用其加工的微波器件具有低損耗、溫度系數(shù)低、易于小型化等特點(diǎn)�，F(xiàn)今高速高密度PCB設(shè)計(jì)已成為電子產(chǎn)品的重要發(fā)展之一,許多現(xiàn)代電子產(chǎn)品的速度越來越高。計(jì)算機(jī)的時(shí)鐘頻率提高到幾百兆赫乃至千兆赫,無繩電話的頻率從45MHz提高到2.4GHz,數(shù)字無線傳輸?shù)念l率達(dá)到2GHz以上,相應(yīng)地對(duì)電容器的高頻穩(wěn)定性提出了越來越高的要求。用陶瓷材料作為介質(zhì)的微波陶瓷貼片電容已大量地用于射頻和微波電路中,而微波單層片式陶瓷電容器具有良好的高頻性能,其諧振頻率有的已經(jīng)高達(dá)十幾甚至幾十個(gè)GHz,它極小的尺寸也有利于微波器件的小型化設(shè)計(jì),所以在高頻下對(duì)微波單層片式陶瓷電容進(jìn)行測(cè)量具有十分重要的價(jià)值。本文將圍繞微波單層片式陶瓷貼片電容的電容量的測(cè)量理論和方法進(jìn)行研究,所作的主要工作內(nèi)容可概括如下:1.對(duì)已有測(cè)量傳統(tǒng)高頻陶瓷貼片電容的理論和方法進(jìn)行歸納和總結(jié),以此為基礎(chǔ)結(jié)合微波單層片式陶瓷電容自身尺寸和電磁特性重新設(shè)計(jì)測(cè)量結(jié)構(gòu)。2.運(yùn)用微帶線傳輸理論并結(jié)合計(jì)算機(jī)仿真軟件HFSS設(shè)計(jì)了能夠測(cè)量微波單層片式陶瓷電容的微帶結(jié)構(gòu),得到仿真條件下傳輸系數(shù)的數(shù)據(jù),然后利用Matlab工具軟件編寫程序擬合出電容器的電容值,由此,測(cè)量得到了單層片式陶瓷電容的電容值。3.加工裝配測(cè)量裝置,進(jìn)行了傳輸系數(shù)的測(cè)試,根據(jù)測(cè)試結(jié)果修正測(cè)量方法,最終獲得有效準(zhǔn)確的測(cè)量微波單層片式陶瓷電容的方法。
[Abstract]:Microwave dielectric ceramics are a kind of new electronic materials developed in recent decades. They are the hot points in the research field of microwave dielectric materials at home and abroad in recent years. They are widely used in many aspects of communication field. Especially in mobile communication system. The microwave device fabricated by the device has the advantages of low loss, low temperature coefficient and easy miniaturization. Nowadays, high speed and high density PCB design has become one of the important developments of electronic products, and the speed of many modern electronic products is getting higher and higher. The clock frequency of computer is raised to several hundred MHz or even gigahertz, the frequency of cordless telephone is increased from 45MHz to 2.4 GHz, and the frequency of digital wireless transmission is above 2GHz. Accordingly, the high frequency stability of capacitor is demanded more and more. Microwave ceramic patch capacitors with ceramic materials as dielectric have been widely used in RF and microwave circuits, while microwave monolayer ceramic capacitors have good high frequency performance. Some of its resonant frequency has reached more than 10 or even dozens of GHz, and its minimal size is also beneficial to the miniaturization design of microwave devices. Therefore, it is of great value to measure microwave monolayer ceramic capacitors at high frequency. In this paper, the measurement theory and method of capacitance of microwave monolayer ceramic patch capacitor are studied. The main work can be summarized as follows: 1. The existing theories and methods of measuring traditional high frequency ceramic patch capacitors are summarized and summarized. Based on these theories, the measurement structure of microwave monolayer ceramic capacitors is redesigned in combination with the size and electromagnetic characteristics of microwave monolayer ceramic capacitors. Using the theory of microstrip transmission and the computer simulation software HFSS, the microstrip structure which can measure the microwave single-layer ceramic capacitance is designed, and the data of transmission coefficient under the simulation condition are obtained. Then the capacitor value of the capacitor is fitted by Matlab software, and the capacitance value of the single-layer ceramic capacitor is measured. 3. The transmission coefficient was measured by machining and assembling measuring device, and the measuring method was revised according to the test results. Finally, an effective and accurate method for measuring microwave monolayer ceramic capacitance was obtained.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN04;TM934.2

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