發(fā)布時間：2018-08-01 16:41

【摘要】：近些年來,隨著微波毫米波通信系統(tǒng)的迅猛發(fā)展,濾波器作為射頻系統(tǒng)的關(guān)鍵部件之一,受到了越來越多的關(guān)注�；刹▽�(dǎo)(Substrate Integrated Waveguide, SIW)結(jié)構(gòu)由于其所具有的低損耗、高品質(zhì)因素、高功率容量、重量輕、易于加工和便于集成等特點,受到了廣泛的關(guān)注。在SIW結(jié)構(gòu)基礎(chǔ)上,為了減小尺寸,半�；刹▽�(dǎo)(Half Mode Substrate Integrated Waveguide, HMSIW)等結(jié)構(gòu)相繼被提出。平衡濾波器由于對環(huán)境噪聲有很好的免疫力,而受到越來越多的關(guān)注。微帶結(jié)構(gòu)的平衡濾波器已經(jīng)被廣泛研究,但是這些結(jié)構(gòu)很難工作到毫米波等高頻段。而SIW和HMSIW結(jié)構(gòu)可以很好的工作在毫米波頻段,本文基于SIW和HMSIW結(jié)構(gòu)提出了多種新型的平衡濾波器,設(shè)計的平衡濾波器具有多種頻率響應(yīng)和良好的共模抑制能力,具有極大的工程應(yīng)用價值。本文首先介紹了SIW的傳播特性等基本理論、SIW與微帶線過渡結(jié)構(gòu)的設(shè)計和引入傳輸零點的方法,其次通過對腔體的場分布研究,發(fā)現(xiàn)腔體的TEl02模和TE202�？梢院芎玫膫鬏敳钅Ｐ盘柡鸵种乒材Ｐ盘�。此外,在腔體中加載槽線可以提高TE201模頻點和第二差模通帶的共模抑制能力。最后設(shè)計了SIW雙通帶平衡濾波器,并提出了共模抑制改進型SIW雙通帶平衡濾波器,均取得了非常理想的仿真和測試結(jié)果。同時提出了HMSIW高選擇性平衡濾波器和雙通帶平衡濾波器設(shè)計方法。由于HMSIW結(jié)構(gòu)的TEl02模場分布跟SIW腔體TE102模場分布相類似,同樣具有傳輸差模信號和抑制共模信號能力。因此先提出基于HMSIW的平衡濾波器,然后分別通過加載槽線和EBG結(jié)構(gòu)分別實現(xiàn)通帶高選擇性和雙通帶特性。此設(shè)計方法,大大減小了濾波器尺寸,且仿真和測試結(jié)果十分吻合。
[Abstract]:In recent years, with the rapid development of microwave and millimeter wave communication system, filter, as one of the key components of radio frequency system, has received more and more attention. Substrate integrated waveguide (Substrate Integrated Waveguide, SIW) structure has attracted wide attention due to its characteristics of low loss, high quality factors, high power capacity, light weight, easy processing and easy integration. On the basis of SIW structure, in order to reduce the size, half-mode substrate integrated waveguide (Half Mode Substrate Integrated Waveguide, HMSIW) and other structures have been proposed one after another. The balance filter has attracted more and more attention because of its good immunity to environmental noise. Microstrip balanced filters have been widely studied, but these structures are difficult to work in millimeter wave and other high frequency bands. However, SIW and HMSIW structure can work well in millimeter wave band. Based on SIW and HMSIW structure, several new balanced filters are proposed in this paper. The designed balanced filter has a variety of frequency response and good common mode suppression capability. It has great engineering application value. In this paper, the basic theories such as propagation characteristics of SIW and the design of transition structure between SIW and microstrip line are introduced, and the method of introducing transmission zeros is introduced. Secondly, the field distribution of the cavity is studied. It is found that the TEl02 mode and the TE202 mode of the cavity can transmit the differential mode signal and suppress the common mode signal well. In addition, the common mode suppression ability of TE201 mode frequency point and the second difference mode passband can be improved by loading slot line in the cavity. At last, the SIW double pass band balance filter is designed, and a common-mode suppression modified SIW double pass band balance filter is proposed. The results of simulation and test are very ideal. At the same time, the design methods of HMSIW high selectivity balanced filter and double pass band balanced filter are proposed. Because the TEl02 mode field distribution of the HMSIW structure is similar to that of the SIW cavity TE102 mode field distribution, it also has the ability to transmit the differential mode signal and suppress the common-mode signal. Therefore, a balanced filter based on HMSIW is proposed, and then the high passband selectivity and double pass band characteristics are realized by loading slot line and EBG structure, respectively. The size of the filter is greatly reduced by this design method, and the simulation results are in good agreement with the test results.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713

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本文編號：2158191