本文選題：帶通濾波器　切入點：復合左右手　出處：《電子科技大學》2017年博士論文　論文類型：學位論文

【摘要】：目前,無線通信的信道資源非常緊張,在一個信道當中時常會同時傳輸多路信號。為了避免信號之間互相干擾,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,多頻段多制式的無線通信也對濾波器提出了性能方面的更多要求。本論文以設(shè)計高性能、小型化的平面帶通濾波器為目的,結(jié)合枝節(jié)結(jié)構(gòu)、復合左右手(CRLH)結(jié)構(gòu)對濾波器的設(shè)計方法進行了研究和探討,所做的主要工作和創(chuàng)新如下:1.設(shè)計了一款工作于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),便于單獨調(diào)整。改變諧振器和枝節(jié)的尺寸參數(shù)均可實現(xiàn)對頻帶的調(diào)節(jié),提高了設(shè)計自由度。引入了源負載耦合增強了頻率選擇性,引入了交指電容實現(xiàn)了內(nèi)部耦合的調(diào)節(jié),采用了奇偶模理論對濾波器結(jié)構(gòu)進行了分解,簡化了分析流程。2.對加載雙枝節(jié)的階躍阻抗諧振器(SIR)進行了研究,建立了它在兩個頻帶內(nèi)的等效電路模型,分析了不同阻抗比例對諧振頻率分布的影響,結(jié)合全波仿真闡述了在兩個頻帶內(nèi)單獨調(diào)整外部品質(zhì)因數(shù)和耦合系數(shù)的方法。設(shè)計了一款工作于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現(xiàn)了參數(shù)的準確調(diào)節(jié)。3.在中心頻率為1.65GHz的帶通濾波器設(shè)計中采用半波長旁路枝節(jié)(bypass stub),引入了源負載耦合。通過調(diào)節(jié)枝節(jié)的尺寸在通帶兩側(cè)產(chǎn)生了一對傳輸零點。引入了缺陷地結(jié)構(gòu)(DGS)產(chǎn)生了第三個傳輸零點,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(SIW)結(jié)構(gòu)中加載互補開口環(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),增強了兩個通帶之間的隔離度。濾波器實物尺寸僅為0.59λg×0.51λg,兩個通帶的3dB相對帶寬分別為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.利用雙負單元(DNGC)設(shè)計了一款中心頻率為1GHz的“準平面”窄帶帶通濾波器,DNGC當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品質(zhì)因數(shù)幾乎沒有任何影響。對電路結(jié)構(gòu)進行了詳細分析,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)進一步改善了濾波器的帶外抑制度。濾波器實物窄帶特性較好,3dB相對帶寬僅為2.2%,長度尺寸僅為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。濾波器實物尺寸相當緊湊,大小僅為0.51λg×0.12λg,3dB相對帶寬達到了129%。進一步改良之后,選擇性得到了極大改善,3dB相對帶寬達到了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).

【學位授予單位】：電子科技大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：TN713;TN92

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本文編號：1626083