基于人工电磁结构的微波滤波器研究
发布时间：2018-09-01 18:38
【摘要】：随着无线通信技术的不断发展,各通信系统之间的工作频率间隔越来越窄,同时各种便携式通信设备的普及,促使高性能、小型化以及低成本的微波滤波器成为研究热点。 人工电磁结构为微波滤波器的研究提供了一个崭新的方向。它主要包括有：缺陷地结构(DGS)、电磁带隙结构(EBG)、复合左/右手传输线结构(CRLH-TL)。本文针对这三种结构的特性及其在微波滤波器方面的应用展开研究。论文的主要工作和创新之处包括： 研究分析了缺陷地结构的特性,提出了PSD-DGS结构,并利用PSD-DGS结构和开路枝节线组合,设计了一个低通滤波器,该滤波器具有结构紧凑,尺寸小、选择特性良好和宽阻带优点,完成了加工、测试,测试结果很好地满足了设计要求；设计了一个由新的羊角形缺陷地结构和一对耦合开路枝节线组合的宽带带通滤波器,加工、测试了两个不同中心频率的该型带通滤波器,通过实测与电磁仿真比较,验证了该带通滤波器的实用性,该滤波器具有结构简单、小尺寸、宽通带的优点,在设计过程中提出了羊角形宽带带通滤波器的无损LC等效电路模型,以便进一步对该型滤波器进行研究;研究了马刺线的特性,设计、加工了结合马刺线的微带超宽带带通滤波器和可调带宽的带通滤波器,并完成了实测；分析了一维电磁带隙结构的带隙特性,利用改进的余弦窗加权的双平面电磁带隙结构设计了一个宽阻带的微带低通滤波器,并对几种复合左/右手传输线的特性以及其在微带滤波器方面的应用也进行了简单的研究。 本文主要针对现代通信系统小型化、高性能的要求,利用人工电磁结构进行微波滤波器设计。文中提出的新的缺陷地结构以及利用它们设计的低通、带通滤波器,对于人工电磁结构研究和以及人工电磁结构在微波滤波器设计中的应用具有一定的参考价值。
[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.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713
本文编号：2218016
[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.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713
【参考文献】
相关期刊论文 前3条
1 蒋迪;徐跃杭;徐锐敏;林为干;;基于半模基片集成波导的新型带通滤波器研究[J];电波科学学报;2013年02期
2 戚楠;李胜先;;超宽带微波滤波器研究现状[J];现代电子技术;2014年17期
3 汪子成;杨涛;杨自强;;基于DGS结构的超宽带带通滤波器[J];压电与声光;2014年06期
，本文编号：2218016
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