本文選題：功率分配器 + 小型化　； 參考：《南京理工大學(xué)》2016年碩士論文

【摘要】：功率分配器扮演著無可替代的角色,無論是相控陣?yán)走_(dá)、電子探測(cè)、電子對(duì)抗等軍用系統(tǒng),還是移動(dòng)通信、衛(wèi)星通信、無線局域網(wǎng)、電視、遙控等民用系統(tǒng),都會(huì)用到功率的合成和分配技術(shù)。Wilkinson功分器和定向耦合器作為功率分配器應(yīng)用的兩個(gè)分支已成為當(dāng)下研究的熱點(diǎn)。隨著射頻微波系統(tǒng)對(duì)微波元器件的小型化、高性能提出了更高的要求,對(duì)微型化高性能功率分配器的研究勢(shì)在必行,本文圍繞著如何使Wilkinson功分器和定向耦合器實(shí)現(xiàn)小型化、高性能做了如下的工作：(1)針對(duì)微帶結(jié)構(gòu)、同軸結(jié)構(gòu)和波導(dǎo)結(jié)構(gòu)等傳統(tǒng)功分器尺寸過大的問題,利用了LTCC技術(shù)對(duì)內(nèi)埋電感、內(nèi)埋電容進(jìn)行三維集成：針對(duì)隔離度不高、端口匹配不好等問題,采用了集總形式的Wilkinson功分器結(jié)構(gòu)。結(jié)合ADS和HFSS聯(lián)合仿真,對(duì)原理圖中原件逐個(gè)擬合,設(shè)計(jì)出了一款通帶在1.8-2.2GHz體積是3.2mm*1.6mm*0.9mm性能良好的功率分配器。(2)針對(duì)基于LTCC技術(shù)集總結(jié)構(gòu)的WiIkinson功分器調(diào)試規(guī)律做了探究,分別對(duì)功分器中電感、接地電容、并聯(lián)電容和層間距對(duì)功分器造成的影響進(jìn)行了研究,通過對(duì)上述元件參數(shù)的掃描仿真,總結(jié)出元件對(duì)功分器性能影響的規(guī)律。并利用這些調(diào)試規(guī)律在原模型基礎(chǔ)上設(shè)計(jì)出了通帶在L波段和S波段兩款性能良好的功分器。其體積都是3.2mm*1.6mm'0.9mm,L波段功分器通帶在0.9-1.2GHz,S波段功分器的通帶在2.8-3.1GHz。兩款功分器的實(shí)物測(cè)試效果表明,插入損耗均小于1.5dB,隔離度均值優(yōu)于20dB,在測(cè)試誤差允許的范圍內(nèi)和仿真結(jié)果相吻合,達(dá)到了設(shè)計(jì)指標(biāo)。(3)針對(duì)傳統(tǒng)微帶定向耦合器尺寸大、損耗高的問題,對(duì)雙層帶狀線應(yīng)用LTCC技術(shù),引入蛇形走線方式進(jìn)行高度集成；通過理論計(jì)算出帶狀線長(zhǎng)度、寬度和間距,在此基礎(chǔ)上分別對(duì)微帶線長(zhǎng)、寬、間距掃描優(yōu)化,設(shè)計(jì)出了一款體積是4mm*7.48mm*2.2mm.插入損耗小于0.2dB、隔離度優(yōu)于25dB工作在2.65-3.55GHz的小型化高性能定向耦合器。
[Abstract]:The power divider plays an irreplaceable role, whether it is military systems such as phased array radar, electronic detection, electronic countermeasures, or civilian systems such as mobile communications, satellite communications, wireless local area networks, television, remote control, etc.Wilkinson power divider and directional coupler are used as two branches of power divider application.With the miniaturization of microwave components in RF microwave system, higher requirements for high performance are put forward. It is imperative to study miniaturized high performance power dividers. This paper focuses on how to miniaturize Wilkinson power dividers and directional couplers.High-performance work is done as follows: (1) aiming at the problem of excessive size of traditional power dividers such as microstrip structure, coaxial structure and waveguide structure, the LTCC technology is used to integrate the embedded inductance and the buried capacitance: the isolation is not high.Due to poor port matching, the lumped Wilkinson power divider structure is adopted.Combined with the joint simulation of ADS and HFSS, the original parts in the schematic diagram are fitted one by one, and a power divider with good 3.2mm*1.6mm*0.9mm performance in 1.8-2.2GHz volume is designed.) the debugging rule of WiIkinson power divider based on LTCC technology lumped structure is explored.The effects of inductance, grounding capacitance, parallel capacitance and layer spacing on the power divider are studied, and the effects of the components on the performance of the splitter are summarized by scanning simulation of the parameters mentioned above.Two kinds of power dividers with good performance in L band and S band are designed on the basis of these debugging rules on the basis of the original model.Its volume is 3.2mm ~ 1.6mm ~ 0.9mm ~ (-1) mm ~ (-1) L band power divider pass band in 0.9-1.2GHz band S-band power divider's passband is 2.8-3.1GHz ~ (-1) GHz.The physical test results of the two power dividers show that the insertion loss is less than 1.5 dB, the average isolation is better than 20 dB, and the test error is in agreement with the simulation results, which reach the design target. (3) for the traditional microstrip directional coupler, the size of the coupler is large.For the problem of high loss, the LTCC technique is applied to the double-layer strip line, and the snake-like line mode is introduced for high integration, and the length, width and spacing of the strip line are calculated theoretically, and the scanning length, width and spacing of the microstrip line are optimized, respectively, on the basis of which the length, width and spacing of the microstrip line are optimized.A design is designed with a volume of 4 mm, 7.48 mm and 2.2 mm.The insertion loss is less than 0.2 dB, and the isolation is better than that of 25dB working in the 2.65-3.55GHz miniaturized high performance directional coupler.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN626;TN622
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本文編號(hào)：1760118