本文選題：毫米波 + 接口平面化　； 參考：《電子科技大學》2017年碩士論文

【摘要】：隨著通信技術的向前發(fā)展,尤其是移動互聯(lián)網(wǎng)的迅速崛起,海量的數(shù)據(jù)需要借助于通信設備進行傳輸。微波頻譜資源已經(jīng)不能滿足當前的社會要求,進一步開發(fā)高頻頻譜資源已經(jīng)是行業(yè)的趨勢。濾波器在整個系統(tǒng)中充當著選頻的作用,它性能的好壞直接影響著通信質(zhì)量。腔體濾波器在高頻頻段仍具有高Q值,濾波器帶內(nèi)損耗較平面濾波器有很大的優(yōu)勢。因此,在高頻頻段腔體濾波器占據(jù)主導地位,然而濾波器體積大、不易于同其他器件連接等原因制約著其發(fā)展前景。MEMS、LTCC等技術的出現(xiàn)在一定程度上解決了這一難題,但是用這些工藝制作出的濾波器價格昂貴、加工周期長。本文針對腔體濾波器接口的平面化和小型化問題展開研究,致力于平面饋入式的腔體濾波器。在設計上,利用諧振腔之間的交叉耦合和部分諧振器采用新的結(jié)構,盡可能減小濾波器的體積。在工藝上,為了實現(xiàn)接口的平面化將外部電路印制在PCB基片上,通過基片背面開槽將能量耦合到諧振腔中。本文根據(jù)濾波器的基本原理和耦合理論設計、加工和測試了多款濾波器。主要的內(nèi)容可概括為:第一,對金屬諧振腔和耦合結(jié)構進行討論,成功的設計了一款Ku波段多層腔體濾波器,其結(jié)構比較簡單。為了實現(xiàn)接口平面化,將外部耦合電路印制在PCB基板上然后通過槽耦合到諧振腔內(nèi);為了盡量減小腔體的平面面積將六個諧振腔分三層垂直堆疊,每層兩個諧振腔。第二,對半波長懸梁結(jié)構諧振理論進行深入研究,成功的設計了三款新型Ka波段多層腔體濾波器,濾波器結(jié)構相對有些復雜。為了實現(xiàn)接口平面化,將外部耦合電路印制在PCB基板上然后通過槽耦合到諧振腔內(nèi);濾波器諧振結(jié)構長度為半波長TEM波,這種類型的濾波器較傳統(tǒng)波導類型濾波器有更小的體積和更寬的阻帶。第三,利用MEMS先進的技術工藝設計、制作了兩款W波段的腔體濾波器,濾波器結(jié)構為四個并排相連的諧振腔組成。通過比較體現(xiàn)了廣義切比雪夫濾波器具有更好的性能。
[Abstract]:With the development of communication technology, especially the rapid rise of mobile Internet, huge amounts of data need to be transmitted by means of communication devices. Microwave spectrum resources can not meet the current social requirements, further development of high frequency spectrum resources has been the trend of the industry. The filter acts as the frequency selector in the whole system, and its performance directly affects the communication quality. The cavity filter still has a high Q value in the high frequency band, and the in-band loss of the filter has a great advantage over the plane filter. Therefore, cavity filter occupies the dominant position in the high frequency band. However, the large size of the filter, which is difficult to connect with other devices and other reasons, restricts the development prospects of the filter. The appearance of the technology, such as MEMS / LTCC, solves this problem to a certain extent. But the filter made by these processes is expensive and has a long processing period. In this paper, we focus on the planarization and miniaturization of cavity filter interface, and focus on the planar feed-in cavity filter. In design, the cross-coupling between resonators and the new structure of partial resonators are used to minimize the size of the filter. In the process, the external circuit is printed on the PCB substrate in order to realize the planarization of the interface, and the energy is coupled to the resonator through the slotted back of the substrate. According to the basic principle of filter and coupling theory, several filters are machined and tested in this paper. The main contents can be summarized as follows: first, the metal resonator and the coupling structure are discussed, and a Ku band multilayer cavity filter is successfully designed, the structure of which is relatively simple. In order to realize the interface planarization, the external coupling circuit is printed on the PCB substrate and coupled to the resonator through the slot. In order to minimize the plane area of the cavity, the six resonators are stacked vertically in three layers, with two resonators in each layer. Secondly, the resonance theory of half-wavelength cantilever structure is deeply studied, and three new Ka-band multilayer cavity filters are successfully designed. The structure of the filter is relatively complex. In order to realize the interface planarization, the external coupling circuit is printed on the PCB substrate and coupled to the resonator through the slot. This type of filter has smaller volume and wider stopband than conventional waveguide filter. Thirdly, two W-band cavity filters are fabricated using the advanced MEMS technology. The filter structure is composed of four resonators connected side by side. The comparison shows that the generalized Chebyshev filter has better performance.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN713

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