【摘要】：伴隨著現(xiàn)代無(wú)線通信系統(tǒng)的迅速發(fā)展,作為其中的關(guān)鍵部分,高性能寬帶、多頻帶微波濾波器及平衡式濾波器已經(jīng)成為了近年來(lái)電磁領(lǐng)域的研究熱點(diǎn)。本論文結(jié)合理論研究和實(shí)際工程需求,提出了一系列新型的平面濾波結(jié)構(gòu),主要包含基于枝節(jié)加載諧振器的新型耦合結(jié)構(gòu)、準(zhǔn)集總參數(shù)混合型諧振器和枝節(jié)加載多模槽線結(jié)構(gòu),并探索其在單端式以及平衡式微波濾波器中的應(yīng)用。首先,第二章中,提出了一種新型E形短路枝節(jié)加載諧振器的耦合方式,實(shí)現(xiàn)了諧振模式的獨(dú)立控制,基于此實(shí)現(xiàn)了一款高性能四頻帶帶通濾波器。提出了一款加載開(kāi)路枝節(jié)耦合單元的多模諧振器,可通過(guò)調(diào)節(jié)枝節(jié)間耦合量,實(shí)現(xiàn)對(duì)奇模諧振頻率的獨(dú)立控制�；诖嗽O(shè)計(jì)了一款高選擇性陷波超寬帶濾波器。此外,將源負(fù)載電耦合結(jié)構(gòu)引入基片集成波導(dǎo)濾波器的設(shè)計(jì)中,在通帶近端及遠(yuǎn)端阻帶內(nèi)產(chǎn)生數(shù)個(gè)額外零點(diǎn),提高了濾波器的選擇特性和諧波抑制能力。其次,第三章對(duì)不同邊界條件下平行耦合饋電結(jié)構(gòu)的特性進(jìn)行了深入分析,并結(jié)合混合電磁耦合結(jié)構(gòu),實(shí)現(xiàn)了一系列具有高共模抑制能力和近端零點(diǎn)的平衡濾波器,其中二階電路可在通帶一側(cè)產(chǎn)生一個(gè)近端零點(diǎn),三階電路可在通帶二側(cè)各產(chǎn)生一個(gè)近端零點(diǎn),有效提高了通帶選擇性。然后,基于平衡式饋電網(wǎng)絡(luò),利用階躍阻抗諧振器的基模和高次模,實(shí)現(xiàn)了一款雙通帶差分濾波器,同時(shí)具有良好的差模雙通帶濾波器響應(yīng)和較高的共模抑制能力。第三,第四章提出了一種結(jié)構(gòu)緊湊、諧振頻率靈活可控的混合諧振器結(jié)構(gòu),。基于經(jīng)典濾波器理論以及雙通帶濾波器實(shí)現(xiàn)條件,提出了一種二階混合型諧振器濾波器的綜合方法,可以同時(shí)實(shí)現(xiàn)對(duì)濾波器二個(gè)通帶的帶寬以及帶內(nèi)波紋的靈活控制�；诖�,設(shè)計(jì)并實(shí)現(xiàn)了一款基于混合諧振器的二階雙通帶濾波器。然后利用鏡像方式研發(fā)了一款高性能差分式雙通帶濾波器。第四,第五章中對(duì)槽線結(jié)構(gòu)的二種分析方法進(jìn)行了介紹及對(duì)比�；陔姶艑�(duì)偶原理,提出了一系列基于多模槽線諧振器的平衡濾波器,其可在通帶近端產(chǎn)生傳輸零點(diǎn),實(shí)現(xiàn)了較高的通帶選擇性。同時(shí)利用槽線結(jié)構(gòu)所具有的天然共模抑制特性,與微帶結(jié)構(gòu)的相比具有更為優(yōu)異的共模抑制能力以及設(shè)計(jì)簡(jiǎn)單的優(yōu)點(diǎn)。然后,基于單枝節(jié)加載的雙模槽線諧振器,研發(fā)了一款雙通帶帶通濾波器,隨后引入平衡式饋電網(wǎng)絡(luò)實(shí)現(xiàn)了一款平衡式雙通帶濾波器。最后,對(duì)本論文中的研究工作進(jìn)行總結(jié)概括,并對(duì)今后的研究工作進(jìn)行展望。
[Abstract]:With the rapid development of modern wireless communication systems, high-performance broadband, multi-band microwave filters and balanced filters have become the focus of research in electromagnetic field in recent years. In this paper, a series of novel planar filter structures are proposed, which include a new coupling structure based on branch-loaded resonator, a quasi-lumped parametric hybrid resonator and a branch-loaded multi-mode slot-line structure, combined with theoretical research and practical engineering requirements. Its application in single-ended and balanced microwave filters is also explored. Firstly, in the second chapter, a new coupling mode of E-shaped short-circuit branch-loaded resonator is proposed, and the independent control of resonant mode is realized. Based on this, a high-performance four-band-pass filter is implemented. A multi-mode resonator loaded with open branch coupling element is proposed. The frequency of odd mode resonance can be controlled independently by adjusting the coupling between branches. Based on this, a high-selective notch ultra-wideband filter is designed. In addition, the source load coupling structure is introduced into the design of the substrate integrated waveguide filter, and several additional zeros are generated in the near and far stop bands of the filter, which improves the selection characteristics and harmonic suppression ability of the filter. Secondly, in chapter 3, the characteristics of the parallel coupling feed structure under different boundary conditions are deeply analyzed, and a series of balanced filters with high common-mode rejection ability and near-zero point are realized by combining the hybrid electromagnetic coupling structure. The second-order circuit can produce a near-end zero on one side of the pass-band, and the third-order circuit can produce a near-end zero-point on each side of the pass-band, which effectively improves the pass-band selectivity. Then, based on the balanced feed network, a dual-band differential filter is realized by using the fundamental mode and high-order mode of the step impedance resonator. At the same time, the differential-mode dual-band filter has good response and high common-mode suppression ability. In chapter 3 and chapter 4, a hybrid resonator with compact structure and flexible and controllable resonant frequency is proposed. Based on the classical filter theory and the realization condition of the dual-pass band filter, a synthesis method of the second-order hybrid resonator filter is proposed, which can realize the flexible control of the band width and the intra-band ripple of the filter at the same time. Based on this, a second-order double-pass band filter based on hybrid resonator is designed and implemented. Then a high-performance differential dual-band filter is developed by mirror image method. The fourth and fifth chapter introduces and compares the two analytical methods of slot structure. Based on the principle of electromagnetic duality, a series of balanced filters based on multi-mode slot line resonators are proposed, which can generate transmission zeros at the near end of the pass band and achieve high pass-band selectivity. At the same time, compared with the microstrip structure, the slot-line structure has more excellent common-mode suppression ability and simple design advantage by using the natural common-mode suppression characteristic of the slot-line structure. Then, a dual-pass band-pass filter is developed based on the dual-mode slot-line resonator loaded with a single branch, and then a balanced dual-pass filter is implemented by introducing a balanced feed network. Finally, the research work in this paper is summarized, and the future research work is prospected.
【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

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 徐照旭;微波濾波器綜合診斷及其小型化研究[D];電子科技大學(xué);2016年

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本文編號(hào)：2452966