【作者】 王志刚；

【导师】 林为干； 徐锐敏；

【作者基本信息】 电子科技大学 ， 电磁场与微波技术， 2010， 博士

【摘要】 近些年发展起来的低温共烧陶瓷(Low Temperature Co-fired Ceramic)技术,即LTCC技术,是MCM-C中的一种最有发展前途的技术,因其在微波毫米波频段表现出优异的性能,已经成为微波毫米波高密度集成技术研究发展的热点。本文针对基于LTCC技术的微波毫米波前端设计过程中的部分关键问题展开研究,取得了一些有益的成果。主要的研究工作如下:1.毫米波波导-微带过渡:由于LTCC工艺的限制,不规则基板加工困难,传统的波导-微带过渡结构不适用于LTCC技术。因此,基于LTCC的特点,本文提出了多种矩形波导-微带过渡结构,主要包括基于SIR开槽的八毫米波波导-微带过渡结构、基于E面探针的三毫米波波导-微带过渡结构和基于介质集成波导的三毫米波波导-微带过渡结构,并且进行加工测试,均获得了比较理想的性能。2.微波毫米波带通滤波器:利用LTCC的多层结构,可以设计出性能优异、结构新颖的微波毫米波滤波器。本文提出了U型SIR和折叠型SIR带通滤波器两种结构。基于介质集成折叠波导,本文提出了多种多层带通滤波器结构,包括基于H面膜片、H面狭槽、H面膜片和狭槽、以及基于双H面膜片的SIFW带通滤波器结构。本文提出了一种新型的传输结构,即半模介质集成折叠波导。基于这种HMSIFW传输结构,提出了一种基于H面膜片和狭槽的带通滤波器结构,实验证明了滤波器结构的可行性。3.微波数字移相器:本文采用传统的单层介质材料对Ku波段六位数字移相器进行了设计,获得了良好的实验结果。在此基础上,提出了一种新型带加载的开关线型移相器结构,该结构可以实现宽带非色散移相器。采用这种结构,实现了基于LTCC技术的X波段四位数字移相器,获得了较好的实验结果。4.毫米波宽带开关滤波组件:本文提出了一种新型三线带通滤波器结构,利用该结构和传统的E面膜片带通滤波器结构分别实现了覆盖Ka波段的四路开关滤波组件和两路开关滤波组件,获得了良好的实验结果。在此基础上,设计完成了基于LTCC技术的18-40GHz的五路开关滤波组件。5.LTCC前端集成设计:LTCC的一个优势是在单个多层介质基板上实现高密度系统集成。本文设计了一个X波段两次变频接收前端和一个Ka波段收发前端,并进行了布局分析和加工测试,获得了较好的实验结果。更多还原

【Abstract】 Recent research and investigations have proved the LTCC technology (Low Temperature Co-fired Ceramic) as one of the most promising solutions among MCM-C. Due to its good performance, it has become a hot research branch towards high-density integration, especially in the field of microwave and millimeter-wave design. The focus of this thesis is on some key skills and techniques when designing LTCC based microwave and millimeter-wave front-ends, namely divided in five parts: rectangular waveguide-microstrip transition in millimeter-wave frequency band, bandpass filters in microwave and millimeter-wave frequency band, microwave digital phase shifter, millimeter-wave broadband switch filter module, and front-end system.1. Rectangular waveguide-microstrip transition in millimeter-wave frequency band: Traditional constructions for transition in millimeter-wave are no longer suitable for LTCC technology, which is mainly for the limitation of LTCC fabrication process. Under this background, several novel transitions based on LTCC is proposed in this thesis, including the SIR slot waveguide-microstrip transition in Ka band, E-plane probe waveguide-microstrip transition in W band and the SIW-based waveguide-microstrip transition in W band. All the measured results of these transitions are good.2. Bandpass filters in microwave and millimeter-wave frequency band: A U-type SIR bandpass filter and a folded SIR bandpass filter are proposed. They have the merits of compactness, while maintaining a good filtering function. Some SIFW bandpass filters are proposed as well: H-plane septa SIFW bandpass filter, H-plane slot SIFW bandpass filter, H-plane septa and slot SIFW bandpass filter, and dual-H-plane septa SIFW bandpass filter. The measured results show good performance. What is more, a novel type transmission line, HMSIFW, is proposed in this thesis. To validate the transmission line structure, an H-plane spta and slot HMSIFW bandpass filter is proposed and measured. 3. Microwave digital phase shifter: A Ku band six-bit phase shifter with traditional single-layer PCB technology is designed. Then, a novel switched-line with loaded-line phase shifter is proposed, which could realize wide non-dispersive phase shifter. Using the novel filter structure, an X band four-bit phase shifter is designed. The measured results show good performance.4. Millimeter-wave broadband switch filter module: Using a novle three-line bandpass filter and a traditional E-plane waveguide bandpass filter, a four-way and two-way switch filter modules are designed. All the modules mentioned above get good measured results. With the experience of previous work, a five-way switch filter module is designed.5. Design of LTCC front-end systems: Front-end systems design includes an X band twice-frequency-conversion receive front-end and a Ka band transceiver front-end. Both of the two are realized by the high-density advantage of LTCC technology. Their measured results reach the design specifications.更多还原