【摘要】：隨著無線通信技術(shù)的不斷發(fā)展,各通信系統(tǒng)之間的工作頻率間隔越來越窄,同時各種便攜式通信設(shè)備的普及,促使高性能、小型化以及低成本的微波濾波器成為研究熱點(diǎn)。 人工電磁結(jié)構(gòu)為微波濾波器的研究提供了一個嶄新的方向。它主要包括有：缺陷地結(jié)構(gòu)(DGS)、電磁帶隙結(jié)構(gòu)(EBG)、復(fù)合左/右手傳輸線結(jié)構(gòu)(CRLH-TL)。本文針對這三種結(jié)構(gòu)的特性及其在微波濾波器方面的應(yīng)用展開研究。論文的主要工作和創(chuàng)新之處包括： 研究分析了缺陷地結(jié)構(gòu)的特性,提出了PSD-DGS結(jié)構(gòu),并利用PSD-DGS結(jié)構(gòu)和開路枝節(jié)線組合,設(shè)計了一個低通濾波器,該濾波器具有結(jié)構(gòu)緊湊,尺寸小、選擇特性良好和寬阻帶優(yōu)點(diǎn),完成了加工、測試,測試結(jié)果很好地滿足了設(shè)計要求；設(shè)計了一個由新的羊角形缺陷地結(jié)構(gòu)和一對耦合開路枝節(jié)線組合的寬帶帶通濾波器,加工、測試了兩個不同中心頻率的該型帶通濾波器,通過實(shí)測與電磁仿真比較,驗(yàn)證了該帶通濾波器的實(shí)用性,該濾波器具有結(jié)構(gòu)簡單、小尺寸、寬通帶的優(yōu)點(diǎn),在設(shè)計過程中提出了羊角形寬帶帶通濾波器的無損LC等效電路模型,以便進(jìn)一步對該型濾波器進(jìn)行研究;研究了馬刺線的特性,設(shè)計、加工了結(jié)合馬刺線的微帶超寬帶帶通濾波器和可調(diào)帶寬的帶通濾波器,并完成了實(shí)測；分析了一維電磁帶隙結(jié)構(gòu)的帶隙特性,利用改進(jìn)的余弦窗加權(quán)的雙平面電磁帶隙結(jié)構(gòu)設(shè)計了一個寬阻帶的微帶低通濾波器,并對幾種復(fù)合左/右手傳輸線的特性以及其在微帶濾波器方面的應(yīng)用也進(jìn)行了簡單的研究。 本文主要針對現(xiàn)代通信系統(tǒng)小型化、高性能的要求,利用人工電磁結(jié)構(gòu)進(jìn)行微波濾波器設(shè)計。文中提出的新的缺陷地結(jié)構(gòu)以及利用它們設(shè)計的低通、帶通濾波器,對于人工電磁結(jié)構(gòu)研究和以及人工電磁結(jié)構(gòu)在微波濾波器設(shè)計中的應(yīng)用具有一定的參考價值。
[Abstract]:With the continuous development of wireless communication technology, the working frequency interval between communication systems is becoming narrower and narrower. At the same time, the popularity of various portable communication devices has made the microwave filter with high performance, miniaturization and low cost become a research hotspot.
Artificial electromagnetic structure provides a new direction for the research of microwave filters. It mainly includes defective ground structure (DGS), electromagnetic band gap structure (EBG) and composite left/right-handed transmission line structure (CRLH-TL). In this paper, the characteristics of these three structures and their applications in microwave filters are studied. New features include:
The characteristics of defective ground structure are studied and analyzed. PSD-DGS structure is proposed. A low-pass filter is designed by combining PSD-DGS structure with open-circuit branch line. The filter has the advantages of compact structure, small size, good selection characteristics and wide stopband. The processing and testing are completed. The test results meet the design requirements very well. Two wideband pass filters with different center frequencies are fabricated and tested. The practicability of the filter is verified by comparison with electromagnetic simulation. The filter has the advantages of simple structure, small size and wide bandwidth. A lossless LC equivalent circuit model of wide band band-pass filter with sheep's horn is proposed in the design process for further study of the filter. The characteristics of spur line are studied, and a microstrip ultra-wideband band-pass filter and a band-pass filter with adjustable bandwidth are designed and fabricated. Based on the band gap characteristics of the band gap structure, a wide stopband microstrip low pass filter is designed by using an improved cosine window weighted double plane electromagnetic band gap structure.
This paper mainly aims at the requirement of miniaturization and high performance of modern communication system, using artificial electromagnetic structure to design microwave filter. The new defective ground structure and the low-pass and band-pass filters designed by them, the research of artificial electromagnetic structure and the application of artificial electromagnetic structure in the design of microwave filter are presented. It has certain reference value.
【學(xué)位授予單位】：中國科學(xué)技術(shù)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：2218016