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  本文選題：寬帶 + 功率合成　； 參考：《電子科技大學》2017年碩士論文

【摘要】：連年來微波通訊系統(tǒng)快速成長,相應(yīng)的也敦促了對于微波寬頻帶、大功率和高效率的微波功率合成器的研發(fā)。本文重點闡述了微波功率合成放大器的匹配網(wǎng)絡(luò)結(jié)構(gòu),及其核心組成部分。首先功率分配合成器通過將一路微波電磁信號的能量,按照一定的比例同時分配給兩路或是多路微波功率輸出,當然通常的功率分配比例都是等比的。然后將這多路的分配傳輸下來的信號在每一支路分別經(jīng)過功率放大器放大,再對同樣的功率分配電路對稱使用,讓每一支路放大后的微波功率輸出到一個合成的支路上輸出,則此時由一路輸入的微波功率相當于經(jīng)過了多路放大器的級聯(lián)的放大。然而最巧妙的是這種多路放大合成的功率放大方式,避開了每一個單獨微波功率放大器的輸出功率的上限要求,而使疊加的功率通過無源傳輸線輸出,從而有效的解決了微波通信系統(tǒng)中輸出功率不足的問題。接著,本文介紹了電磁波在徑向傳輸線中存在的形式和特征,為本文分析和討論徑向波導功率分配合成器提供了理論基礎(chǔ)。并在此基礎(chǔ)上系統(tǒng)介紹了徑向波導功率分配器的設(shè)計理論和仿真過程,探討了降低合成電路損耗,提高合成效率和帶寬的方法。隨后,本文研究和生產(chǎn)了運行在2GHz-6.2GHz的5路徑向功率分配器,輸入與輸出回波消耗各自小于16.3dB和10.2dB,插入損耗在7.4dB-7.8d B之間。再又用同樣的方式仿真和生產(chǎn)運行在了2GHz-6.2GHz頻率范圍內(nèi)的12路功率合成器,輸入與輸出回波消耗各自小于14.8dB和9.3dB,插入消耗在10.4dB-11.1dB之間。然后本文在第四章,按照功率合成放大器的理論構(gòu)造和生產(chǎn)了一個工作在2.0GHz-6.2GHz的輸出功率大于60w的功率合成器。測試成效顯示,該合成器的飽和輸出功率大于47.8dBm,在頻點2.5GHz和3.5GHz處為最高功率輸出達到了49.3dBm,頻率范圍內(nèi)增益大于48dB,增益平坦度在3dB之內(nèi),輸入駐波比小于1.5。
[Abstract]:The rapid growth of microwave communication systems over the years has prompted the development of broadband, high-power and high-efficiency microwave power synthesizers. This paper focuses on the matching network structure of microwave power synthesis amplifier and its core components. First, the power distribution synthesizer distributes the energy of a microwave electromagnetic signal according to a certain proportion to two or more microwave power output at the same time, of course, the power distribution ratio is equal. Then the signals transmitted by the multi-channel distribution are amplified by a power amplifier in each branch respectively, and then the same power distribution circuit is used symmetrically, so that the microwave power after each branch amplification is output to a composite branch road output. Then the microwave power input from one channel is equivalent to the amplifier cascade amplification. The most ingenious thing, however, is that this multiplex power amplification method avoids the upper limit of the output power of each individual microwave power amplifier and causes the superimposed power to be outputted through a passive transmission line. Thus the problem of insufficient output power in microwave communication system is effectively solved. Then, the form and characteristics of electromagnetic wave in radial transmission line are introduced, which provides a theoretical basis for the analysis and discussion of radial waveguide power distribution synthesizer. On this basis, the design theory and simulation process of radial waveguide power divider are systematically introduced, and the methods of reducing the loss of synthesis circuit and improving the synthesis efficiency and bandwidth are discussed. Subsequently, a 5-path power divider running at 2GHz to 6.2GHz is studied and produced. The input and output echo consumption is less than 16.3dB and 10.2dB, respectively, and the insertion loss is between 7.4dB-7.8 dB. The 12-channel power synthesizer running in the frequency range of 2GHz to 6.2GHz is simulated and produced in the same way. The input and output echo consumption is less than 14.8dB and 9.3 dB respectively, and the insertion consumption is 10.4dB-11.1 dB. In chapter 4, a power synthesizer with output power greater than 60w operating at 2.0GHz to 6.2GHz is constructed and fabricated according to the theory of power synthesizer. The test results show that the saturation output power of the synthesizer is more than 47.8 dBm.The maximum power output at 2.5GHz and 3.5GHz is 49.3 dBm. the gain in the frequency range is more than 48dB, the gain flatness is within 3dB, and the input standing wave ratio is less than 1.5.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN73

【參考文獻】

相關(guān)期刊論文 前1條

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本文編號：2076935