本文選題：帶通濾波器　切入點(diǎn)：復(fù)合左右手　出處：《電子科技大學(xué)》2017年博士論文　論文類型：學(xué)位論文

【摘要】：目前,無線通信的信道資源非常緊張,在一個(gè)信道當(dāng)中時(shí)常會(huì)同時(shí)傳輸多路信號(hào)。為了避免信號(hào)之間互相干擾,濾波器的作用尤其重要。從易于集成的角度來考慮,希望濾波器具有平面化的結(jié)構(gòu)和緊湊的尺寸,與此同時(shí),多頻段多制式的無線通信也對(duì)濾波器提出了性能方面的更多要求。本論文以設(shè)計(jì)高性能、小型化的平面帶通濾波器為目的,結(jié)合枝節(jié)結(jié)構(gòu)、復(fù)合左右手(CRLH)結(jié)構(gòu)對(duì)濾波器的設(shè)計(jì)方法進(jìn)行了研究和探討,所做的主要工作和創(chuàng)新如下:1.設(shè)計(jì)了一款工作于2.4GHz、3.5GHz、5.15 GHz的三頻帶帶通濾波器,兩組對(duì)稱面上加載了枝節(jié)的諧振器被分別置于饋線上下兩側(cè),形成了橫向結(jié)構(gòu),便于單獨(dú)調(diào)整。改變諧振器和枝節(jié)的尺寸參數(shù)均可實(shí)現(xiàn)對(duì)頻帶的調(diào)節(jié),提高了設(shè)計(jì)自由度。引入了源負(fù)載耦合增強(qiáng)了頻率選擇性,引入了交指電容實(shí)現(xiàn)了內(nèi)部耦合的調(diào)節(jié),采用了奇偶模理論對(duì)濾波器結(jié)構(gòu)進(jìn)行了分解,簡(jiǎn)化了分析流程。2.對(duì)加載雙枝節(jié)的階躍阻抗諧振器(SIR)進(jìn)行了研究,建立了它在兩個(gè)頻帶內(nèi)的等效電路模型,分析了不同阻抗比例對(duì)諧振頻率分布的影響,結(jié)合全波仿真闡述了在兩個(gè)頻帶內(nèi)單獨(dú)調(diào)整外部品質(zhì)因數(shù)和耦合系數(shù)的方法。設(shè)計(jì)了一款工作于2.45GHz和5.35GHz的雙頻帶帶通濾波器,在不增加任何附加網(wǎng)絡(luò),不明顯增加電路面積的前提下實(shí)現(xiàn)了參數(shù)的準(zhǔn)確調(diào)節(jié)。3.在中心頻率為1.65GHz的帶通濾波器設(shè)計(jì)中采用半波長(zhǎng)旁路枝節(jié)(bypass stub),引入了源負(fù)載耦合。通過調(diào)節(jié)枝節(jié)的尺寸在通帶兩側(cè)產(chǎn)生了一對(duì)傳輸零點(diǎn)。引入了缺陷地結(jié)構(gòu)(DGS)產(chǎn)生了第三個(gè)傳輸零點(diǎn),在保證了電路結(jié)構(gòu)緊湊的前提下,極大改善了濾波器的帶外抑制度和頻率選擇性。濾波器實(shí)物尺寸僅為0.29λg×0.26λg,在3GHz到4GHz范圍的阻帶抑制度優(yōu)于50dB。4.通過在基片集成波導(dǎo)(SIW)結(jié)構(gòu)中加載互補(bǔ)開口環(huán)諧振器(CSRR)構(gòu)成了雙頻帶帶通濾波器,其中低頻通帶位于SIW的截止頻率以下,是基于SIW的消逝模產(chǎn)生的,有效減小了電路的尺寸。在CSRR的兩側(cè)蝕刻了DGS結(jié)構(gòu),增強(qiáng)了兩個(gè)通帶之間的隔離度。濾波器實(shí)物尺寸僅為0.59λg×0.51λg,兩個(gè)通帶的3dB相對(duì)帶寬分別為17.4%和54.9%,具有明顯的CRLH結(jié)構(gòu)左右手通帶的特征,插入損耗分別為0.9dB和1.2dB,綜合性能表現(xiàn)優(yōu)秀。5.利用雙負(fù)單元(DNGC)設(shè)計(jì)了一款中心頻率為1GHz的“準(zhǔn)平面”窄帶帶通濾波器,DNGC當(dāng)中包含的螺旋諧振器具有混旋結(jié)構(gòu),該結(jié)構(gòu)非常適合小型化加工而且對(duì)品質(zhì)因數(shù)幾乎沒有任何影響。對(duì)電路結(jié)構(gòu)進(jìn)行了詳細(xì)分析,建立了分布參數(shù)模型和集總參數(shù)模型并完成了相關(guān)參數(shù)的提取。通過加載短路枝節(jié)進(jìn)一步改善了濾波器的帶外抑制度。濾波器實(shí)物窄帶特性較好,3dB相對(duì)帶寬僅為2.2%,長(zhǎng)度尺寸僅為0.17λg,與工作于同頻率的CSRR結(jié)構(gòu)濾波器相比尺寸縮減了60%。6.基于缺陷微帶結(jié)構(gòu)諧振器(DMSR)設(shè)計(jì)了小型化超寬帶(UWB)帶通濾波器,通過加載交指并聯(lián)耦合線(IPCL)和CSRR改善了濾波器的選頻性能和帶外抑制性能。濾波器實(shí)物尺寸相當(dāng)緊湊,大小僅為0.51λg×0.12λg,3dB相對(duì)帶寬達(dá)到了129%。進(jìn)一步改良之后,選擇性得到了極大改善,3dB相對(duì)帶寬達(dá)到了133%,而尺寸僅略有增大(0.97λg×0.32λg)。
[Abstract]:At present, the wireless communication channel resource is very tense, in a channel which often transmit multiple signals at the same time. In order to avoid mutual interference between signals, the filter is especially important. From the integrated perspective, hope filter structure with planarized and compact size, at the same time, multi band multi-mode wireless communication also put forward more requirements on the performance of the filter. In this paper, the design of high performance, small planar bandpass filter for the purpose, with minor structure, CRLH (CRLH) design method of filter structure are studied and discussed, the main work and innovation are as follows: 1. design a workingwithin 2.4GHz, 3.5GHz 5.15 GHz tri band bandpass filter, two groups of symmetrical plane loaded stub resonators are respectively arranged on the feeder on both sides, forming a horizontal structure, easy to Adjust separately. Size parameters can be changed to realize the regulation of the resonator and side band, improve the design degrees of freedom. The source load coupling enhances the frequency selective introduction of interdigital capacitor realizes adjusting the internal coupling, the parity mode theory of filter structure decomposition, simplifies the analysis process of.2. loading double side stepped impedance resonator (SIR) was studied, established its equivalent circuit in two band model, analyzes the different influence on the resonant frequency impedance ratio distribution, combined with the full wave simulation method is introduced to adjust the external quality factor and the coupling coefficient separately in the two band of the dual band design. A work in 2.45GHz and 5.35GHz band bandpass filter, without any additional network, accurate regulation of.3. in the heart does not increase the frequency of circuit area under the premise to achieve the parameters of the The rate of 1.65GHz by half wavelength bandpass filter design side bypass (bypass stub), is introduced. By adjusting the source load coupling stub size in the passband on both sides of a pair of transmission zeros. The defected ground structure (DGS) has third transmission zeros, in ensuring the premise of compact circuit structure under greatly improved filter band suppression and frequency selective filter. The real size of only 0.29 x 0.26 X G x g to 4GHz, stopband suppression is better than 50dB.4. in the substrate integrated waveguide in 3GHz (SIW) structure loaded with complementary split ring resonators (CSRR) constitute a dual band the band-pass filter, the low frequency band is located at SIW below the cutoff frequency of the SIW, is based on evanescent mode, effectively reduce the circuit size. On both sides of the etching of CSRR DGS structure, enhanced the two passband between isolation filters. The size of only 0.59 X G x 0.51 x g, two passband 3dB relative bandwidth of 17.4% and 54.9%, with CRLH structure was the right hand pass band characteristics, insertion loss were 0.9dB and 1.2dB, a comprehensive excellent performance by using.5. double negative unit (DNGC) to design a center frequency 1GHz quasi planar band-pass filter, DNGC spiral resonator has mixed spin structure, the structure is very suitable for processing small and almost has no effect on the quality factor. The structure of the circuit is analyzed in detail, the establishment of the extraction distribution parameter model and the lumped parameter model and relevant parameters. By loading the short stubs to further improve the filter band suppression. Good physical properties of narrow band filter, the relative bandwidth is only 2.2% 3dB, the length is only 0.17 x g, CSRR structure filter and is working on the same frequency Compared with the size reduction of 60%.6. resonator defected microstrip structure (DMSR) based on the design of miniaturized ultra wideband (UWB) band-pass filter, by loading the interdigital parallel coupled line (IPCL) and CSRR to improve the performance of selective frequency and band rejection filter performance. When the real size is compact, size is only 0.51 X G x 0.12 x g, 3dB relative bandwidth reached 129%. further improved, the selectivity was greatly improved, the relative bandwidth of 3dB reached 133%, while the size is only slightly increased (0.97 X G x 0.32 x g).

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN713;TN92

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李勝先;傅君眉;吳須大;;星載高功率微波波導(dǎo)低通濾波器的精確設(shè)計(jì)[J];西安交通大學(xué)學(xué)報(bào);2006年02期

相關(guān)博士學(xué)位論文 前1條

1 張本全;微波無源器件設(shè)計(jì)中的模式匹配法研究[D];電子科技大學(xué);2004年

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本文編號(hào)：1626083