8mm LTCC频率综合器技术研究

发布时间：2018-05-27 22:01

本文选题：Ka波段 + 频率综合器　；参考：《电子科技大学》2015年硕士论文

【摘要】：毫米波在通信、雷达、制导、遥感技术、射电天文学、临床医学和波谱学方面都有重大的意义。毫米波低端的34-36GHz利用其大气窗口这一特点,被越来越广泛地应用在上述领域。作为各种设备仪器心脏的频率综合器,是目前全世界毫米波科技发展的热点。其中,低相噪、快速切换、低杂散和系统级封装等是频率综合器的主要发展趋势,本文就对8mm频率综合器进行了理论分析和探索。本文首先理论介绍了常用的频率综合理论,分析了各种原理的优劣,并基于项目要求进行了指标核算,最终确定了DDS+PLL中DDS激励PLL的综合方案。确定方案后,根据实际情况制定出各个模块相应的实现方式,最终完成了Ka波段频率综合器,其输出中心频率35GHz,带宽2GHz,相噪、跳频时间及杂散抑制等指标都有不错的表现。基于LTCC技术来设计频率综合器是目前的热点之一。综合考虑各个模块LTCC化的可能性,最终确定将本振模块作为试点,融入系统级封装(SIP)的理念。设计制作完成的LTCC本振链路相较于之前的RF60单层微带线链路,表面积有一定缩小。测试结果显示,本文设计的8mm频率综合器,其输出频率34~36GHz;相位噪声优于-85dBc/Hz@1k Hz;杂散电平在Span为2GHz内优于-52dBc;输出功率约为6dBm;频率分辨率优于9Hz;频率切换时间约为150μs(35GHz切换至36GHz)。
[Abstract]:Millimeter waves are of great significance in communications, radar, guidance, remote sensing, radio astronomy, clinical medicine and spectroscopy. 34-36GHz at the low end of millimeter wave is more and more widely used in these fields because of its atmospheric window. As the heart of various equipment, frequency synthesizer is the hot spot of millimeter wave technology development all over the world. Among them, low phase noise, fast switching, low spurious and system-level encapsulation are the main trends of frequency synthesizer. In this paper, the 8mm frequency synthesizer is theoretically analyzed and explored. In this paper, the frequency synthesis theory is introduced, the advantages and disadvantages of various principles are analyzed, and the index calculation is carried out based on the project requirements. Finally, the comprehensive scheme of DDS excitation PLL in DDS PLL is determined. Finally, the Ka-band frequency synthesizer is completed. Its output center frequency is 35 GHz, bandwidth is 2 GHz, phase noise, frequency hopping time and spurious suppression and so on. The design of frequency synthesizer based on LTCC technology is one of the hotspots at present. Considering the possibility of LTCC of each module, the idea of using the local oscillator module as a pilot and integrating the system level package (SIP) is finally determined. Compared with the previous RF60 single-layer microstrip link, the designed and fabricated LTCC local oscillator link has a smaller surface area. The test results show that the output frequency of the 8mm synthesizer is 346GHz, the phase noise is better than -85dBc / Hzr 1k Hz, the spurious level is better than -52dBc in Span, the output power is about 6dBm, the frequency resolution is better than 9Hz, and the switching time is about 150 渭 s(35GHz to 36GHz.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN74

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