本文選題：徑向功率分配/合成器 + 波導(dǎo)�。� 參考：《華南理工大學(xué)》2015年碩士論文

【摘要】：近年來,無論在民用還是在軍用領(lǐng)域,毫米波技術(shù)都得到了越來越多的重視。在通信應(yīng)用方面,毫米波通信適應(yīng)了頻譜資源向高端發(fā)展的技術(shù)趨勢;在軍事領(lǐng)域,毫米波技術(shù)是重要的信息對抗手段;甚至在醫(yī)療領(lǐng)域,毫米波也具有巨大的發(fā)展?jié)摿Α６β史糯笃髡呛撩撞ㄍㄐ畔到y(tǒng)的關(guān)鍵元件,然而,隨著頻率的升高,單個固態(tài)器件的輸出功率逐漸降低,通常達(dá)不到實際系統(tǒng)的需求。為了得到足夠大的輸出功率,可以將多個固態(tài)器件的輸出功率合成從而實現(xiàn)。為此,毫米波功率分配/合成器成為一個研究熱點。現(xiàn)有的毫米波空間功率分配/合成技術(shù)可以分為二進(jìn)制樹形結(jié)構(gòu)、行波結(jié)構(gòu)、波導(dǎo)內(nèi)空間功率合成結(jié)構(gòu)以及徑向結(jié)構(gòu)等。相比其他幾種結(jié)構(gòu),徑向結(jié)構(gòu)具有一次性分配/合成多路信號,且每路信號的幅度和相位一致性良好等優(yōu)點。本論文主要著眼于實現(xiàn)高隔離度的小型化徑向功率分配/合成器,同時還對一種已有的共面魔T結(jié)構(gòu)進(jìn)行了結(jié)構(gòu)上的優(yōu)化,主要工作如下:1、設(shè)計了一種基于E-T功分網(wǎng)絡(luò)的的矩形波導(dǎo)-圓波導(dǎo)模式轉(zhuǎn)換器。該結(jié)構(gòu)利用了圓波導(dǎo)的TE01傳輸模的電場力線繞圓周旋轉(zhuǎn)的特點,通過設(shè)計基于E-T分支器單元的一分四路功分網(wǎng)絡(luò)并與圓波導(dǎo)進(jìn)行連接,實現(xiàn)了將矩形波導(dǎo)中傳播的TE10主模成功變換為圓波導(dǎo)中的TE01模,與傳統(tǒng)結(jié)構(gòu)相比,具有尺寸小,能實現(xiàn)高模式純凈度等優(yōu)點。論文介紹了其工作原理和設(shè)計步驟,最后加工和測試了一個Ka波段的模式轉(zhuǎn)換器背靠背結(jié)構(gòu),驗證了設(shè)計的正確性。2、設(shè)計了基于上述圓波導(dǎo)模式轉(zhuǎn)換器的20路高隔離徑向功率分配/合成器。該功分器通過引入設(shè)計加工好的圓波導(dǎo)模式轉(zhuǎn)換器,適應(yīng)了輸入輸出端口皆為標(biāo)準(zhǔn)矩形波導(dǎo)的設(shè)計需求,并大幅減小了尺寸。同時,通過在輸出端口間插入電阻膜片,改善了端口匹配和隔離。本文詳細(xì)闡述了其工作原理和實現(xiàn)方法,最后加工測試了一個實物結(jié)構(gòu),測試結(jié)果與仿真結(jié)果吻合良好,顯示出良好的特性。3、設(shè)計了基于脊波導(dǎo)的共面波導(dǎo)魔T。該結(jié)構(gòu)在前人基于波導(dǎo)-微帶探針的具有共面臂的波導(dǎo)魔T研究工作的基礎(chǔ)上,使用脊波導(dǎo)耦合結(jié)構(gòu)取代微帶探針,提高了功率容量,并且降低了加工難度。在設(shè)計、仿真工作完成后,加工了一個脊波導(dǎo)魔T實物,并進(jìn)行了測試,最后對測試結(jié)果進(jìn)行分析。
[Abstract]:In recent years, millimeter wave technology has been paid more and more attention in both civil and military fields.In communication applications, millimeter-wave communication adapts to the technical trend of the high-end development of spectrum resources; in the military field, millimeter-wave technology is an important means of information countermeasure; even in the medical field, millimeter-wave has great development potential.Power amplifier is the key component of millimeter-wave communication system. However, with the increase of frequency, the output power of a single solid-state device decreases gradually, which usually falls short of the requirement of the actual system.In order to obtain enough output power, the output power of multiple solid state devices can be combined to achieve.Therefore, millimeter wave power distribution / synthesizer has become a research hotspot.The existing millimeter-wave spatial power allocation / synthesis techniques can be divided into binary tree structure, traveling wave structure, spatial power synthesis structure in waveguide and radial structure.Compared with other structures, the radial structure has the advantages of one-time allocation / synthesis of multiple signals, and good consistency of amplitude and phase of each signal.In this paper, we mainly focus on the realization of a miniaturized radial power distribution / synthesizer with high isolation. At the same time, we also optimize the structure of an existing coplanar magic T structure.The main work is as follows: 1. A rectangular wave-circular waveguide mode converter based on E-T power division network is designed.The structure utilizes the characteristic that the electric field force wire of the TE01 transmission mode of circular waveguide rotates around the circle by designing a four-way power distribution network based on E-T branch unit and connecting with the circular waveguide.The TE10 main mode propagating in rectangular waveguide is successfully transformed into TE01 mode in circular waveguide. Compared with the traditional structure, it has the advantages of small size and high mode purity.The working principle and design steps are introduced in this paper. Finally, a Ka-band back-to-back structure of mode converter is fabricated and tested.The correctness of the design is verified. 2. A 20-channel high isolation radial power distribution / synthesizer based on the circular waveguide mode converter is designed.By introducing the designed circular waveguide mode converter, the power divider adapts to the design of standard rectangular waveguides with input and output ports, and greatly reduces the size.At the same time, the port matching and isolation are improved by inserting resistance diaphragm between the output ports.In this paper, the working principle and the implementation method are described in detail. Finally, a physical structure is processed and tested. The test results are in good agreement with the simulation results, showing good characteristics. 3. The coplanar waveguide magic T based on ridge waveguide is designed.On the basis of the previous work of waveguide magic T with coplanar arm based on waveguide microstrip probe, the ridge waveguide coupling structure is used to replace the microstrip probe, which improves the power capacity and reduces the processing difficulty.After the design and simulation work is completed, a ridge waveguide magic T object is fabricated and tested. Finally, the test results are analyzed.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN626;TN73

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相關(guān)碩士學(xué)位論文 前2條

1 康智勇;Ka波段波導(dǎo)行波空間功率分配/合成器研究[D];華南理工大學(xué);2013年

2 吳瓊森;Ka波段高隔離度波導(dǎo)功率分配/合成器研究[D];華南理工大學(xué);2014年

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本文編號：1745595