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类型 应用研究 预答辩日期 2017-11-23
开始(开题)日期 2013-11-14 论文结束日期 2017-09-19
地点 李文正楼北412 论文选题来源 其他项目    论文字数 5.1 (万字)
题目 Q波段收发信机中关键电路的研究与设计
主题词 Q波段,振荡器,混频器,功率合成,人工表面等离激元
摘要 Q波段(33~50 GHz)作为毫米波近端,具有带宽宽、抗干扰能力强、穿透性强的特点,在高速无线通信、卫星遥感、雷达探测等领域均具有非常好的应用前景。Q波段收发信机(主要包含振荡器、混频器、滤波器、功率放大器等模块)是系统的关键部件之一,直接决定了系统能否正常工作。发达国家较早对Q波段收发信机和关键部件进行了研究,并且有相关产品面世。不过这些主要是针对军事应用,相关产品严格受控。随着Q-LINKPAN的提出,国内近几年对Q波段器件的研究也逐渐增多,但目前较少可用于商业用途。本文基于国内现有的工艺水平,以实现电路的高性能、低成本、易于平面集成为目的,对Q波段收发信机的关键电路及技术进行了研究,主要包括以下几个部分: (1)对Q波段鳍线结构、微带结构及SIW结构小型化带通滤波器的研究。为了实现更加紧凑的结构,本文在宽带鳍线滤波器的基础上,加载周期性电容。实验结果表明,在射频性能类似的情况下,加载周期性电容的结构尺寸缩小了20%左右。本文将平行耦合结构与多模谐振器以及开路短截线结合,用于微带结构滤波器的设计中,降低了对加工工艺的要求,同时提高了滤波器的性能。在电耦合SIW滤波器研究基础上,提出一种新型结构,实现了滤波器的小型化设计。 (2)提出了一种新型阶跃阻抗耦合微带谐振器。利用该谐振器高低阻抗线之间的耦合引起的两个传输零点,来提高滤波器的频率选择性。同时,为了进一步减小滤波器的尺寸,将双模结构引入谐振器中。测试结果表明,本文设计的低通滤波器具有高“滚降”特性以及宽阻带宽度。 (3)研究并实现了K波段宽带基波混频器。通过级联的“鼠笼环”增加了带宽。实验结果显示,当本振频率为17 GHz时,中频DC~6 GHz变频损耗小于11 dB;当中频频率固定在1 GHz时,在17~25 GHz射频频率范围变频损耗小于10 dB。此外该混频器还具有良好的端口隔离度。 (4)设计并实现了两款宽带毫米波二次分谐波混频器。提出了一款新型短路结构滤波器,并将其用于混频器的本振端口。通过回收利用闲散的混频分量来提高混频效率。实验结果显示该分谐波混频器,射频相对带宽超过22%,中频带宽达到10 GHz。为了进一步提高射频工作带宽,提出了一款宽带短路结构滤波器,并将其用于混频器的射频端,实验结果显示该谐波混频器,射频相对带宽超过54%,中频带宽可到6 GHz。 (5)针对传统的立体结构毫米波奇次分谐波混频器难以与其它平面电路集成的问题,本文提出了一种基于SIW结构的Q波段三次分谐波混频器。测试结果表明,当中频固定在2 GHz时,在38~47 GHz频率范围内,变频损耗小于15.6 dB;当本振固定在13 GHz时,中频带宽大约为6.4 GHz,此时变频损耗小于16 dB。 (6)提出了具有高Q值的互补开口谐振环(CSRR)加载SIW圆谐振器,以及CSRR加载1/4模SIW圆谐振器,并将其用于串联反馈式低相位噪声振荡器的设计中。此外,还提出了基于CSRRs加载SIW圆谐振器的双模滤波器,在此基础上设计了X波段低相位噪声振荡器。实测结果显示,振荡频率为10.113 GHz,在偏离振荡频率100 KHz处的相位噪声为-122 dBc/Hz。在串联反馈式振荡器的基础上,研究了进一步降低相位噪声的方法比如通过引入高次模提高谐振器的Q值以及引入双反馈回路,并通过实验进行了验证。 (7)非2的幂次方单元数的毫米波高效率功率合成技术的研究。首先,研究了链式和径向波导功率合成技术,分别设计Q波段六路功率合成电路进行了验证。针对三路波导定向耦合器端口之间存在相位差,无法直接进行功率合成的问题,设计了波导90° 移相器。此外,还提出了具有高端口隔离度的新型波导T型结,并将其与改进的三路波导定向耦合器级联,设计了Q波段六路功率分配/合成电路。本文设计的三款六路功率合成电路均具有插入损耗低、加工安装方便的特点。 (8)研究了人工表面等离激元(SSPP)传输线在微波、毫米波中的应用。提出了一种宽带过渡,将SSPP波导过渡到微带线,实验结果表明该过渡相对工作带宽超过127%。研究了SSPP传输线的封装特性,从理论和实验角度证明其比微带结构在紧凑封装中具有更好的传输特性。利用SSPP传输线的低通特性,设计了Q波段开关电路;将变容管与SSPP传输线结合,设计了Q波段移相电路。据作者所知,这是首次将SSPP传输线应用于功能电路的设计中。
英文题目 Researches and Designs of Key Circuits for Q-Band Transceiver
英文主题词 Q-band,oscillator, mixer, power combining, Spoof Surface Plasmon Polariton (SSPP)
英文摘要 Q-band (33~50 GHz) is located at the low frequency band of millimeter-wave. With the advantages of wide bandwidth, strong anti-interference ability and strong penetrating power, Q-band becomes an idea candidate for high data rata wireless communication, satellite remote sensing and radar detection systems. Q-band transceiver (mainly includes the oscillator, mixer, filter, and power amplifier) is one of the key components of the system, which directly determines the performance of the system. Q-band transceiver and devices have been researched for several years in the developed countries. However, they are mainly used for military purposes, and Q-band devices are strictly controlled. With the development of communication standard Q-LINKPAN, the research on Q-band devices has grown rapidly in recent years in China, but these devices are still not ready for commercial use. In this dissertation, the study on the key circuits of Q-band transceiver is carried out according to the processing level in China. This dissertation is focused on the study of circuits with characteristics of high performance, low cost, and easy for integration. The main research contents in this dissertation are listed as follows: (1) The study on Q-band finline, microstrip, and SIW compact band-pass filters is presented. For further reduction of size, a periodically loaded wide band finline filter is designed. Measurements show that the proposed structure maintains the RF performance and achieves size reduction of about 20%. A microstrip filter composed of parallel coupled lines, multi-mode resonators and open stubs is presented. The filter has a high performance and low requirement of processing capacity. A compact electric coupling structure of substrate integrated waveguide (SIW) bandpass filter is studied. (2) A new type stepped-impedance coupled microstrip resonator is proposed. High frequency selectivity is obtained because of the two transmission zeros produced by the coupling between high and low impedance lines. Dual-mode structure is introduced into the resonator for further size reduction. The low-pass filter using the proposed resonators obtains a sharp roll-off skirt and wideband stopband characteristics. (3) A K-band wideband mixer using cascaded rate-race hybrid is studied. Measurement results show that the conversion loss is less than 11 dB in the IF frequency band of DC~6 GHz with the LO frequency at 17 GHz, and the conversion loss is less than 10 dB in the RF frequency band of 17~25 GHz while the IF frequency is fixed at 1 GHz. Moreover, the mixer possesses good port isolation. (4) Two kinds of wideband millimeter-wave sub-harmonic mixers are presented. To improve the mixing efficiency, a novel short-circuited band-pass filter is proposed and used at the LO port to recycle the idle mixing products. The measurements show that the relative RF frequency bandwidth is more than 22% and the IF frequency can be up to 10 GHz. For further improving of the working bandwidth, a novel wideband short-circuited band-pass filter is used at the RF port. The measured results show that the relative bandwidth is more than 54% for RF frequency and the IF frequency bandwidth can support up to 6 GHz. (5) To solve the problem that the traditional millimeter-wave odd-harmonic mixer is difficult to integrate with planar circuits for its three-dimension, a Q-band third-harmonic mixer using the SIW balun is proposed. The measured results of the mixer show that the conversion loss is less than 15.6 dB over the RF frequency band of 38~47 GHz with the IF frequency fixed at 2 GHz. Furthermore, the conversion loss is less than 16 dB over the IF frequency bandwidth up to 6.4 GHz with LO frequency fixed at 13 GHz. (6) Series feedback low phase noise oscillators are proposed using the CSRRs loaded circular SIW cavity and quarter-mode circular SIW cavity. Moreover, a dual mode band-pass filter based on the CSRRs loaded SIW cavity is used to design an X band parallel feedback low phase noise oscillator. The measured results of the fabricated oscillator demonstrate an output frequency of 10.113 GHz and a phase noise of -122 dBc/Hz at 100 KHz offset. For further reduction of the phase noise, the high order mode cavity with high Q factor and dual feedback topology are studied based on the previously designed series feedback oscillator. (7) None 2n units millimeter-wave power combining technologies as traveling-wave and radial waveguide power combining are studied and Q-band six-way power combiners are designed and measured to validate these techniques. A novel rectangular waveguide T-Junction with high port isolation is proposed and a three-way waveguide directional coupler employing 90° waveguide phase shifter is designed for power combining application. A Q-band six-way power combiner composed of the proposed T-junction and new three-way directional coupler is designed and measured. The Q-band power combiners in this paper show advantages of low insertion loss, easy processing, and convenient installation. (8) Investigation of Spoof Surface Plasmon Polariton (SSPP) in microwave and millimeter-wave applications is presented. A wideband transition from SSPP waveguide to microstrip line is proposed. Measured results show that the transition has a relative bandwidth of more than 127%. Electromagnetic (EM) signals on planar SSPP transmission lines have better propagation performance than those on microstrip lines with the same size and separation to the shielding box are demonstrated theoretically and experimentally. A Q-band switch based on the low-pass characteristics of SSPP transmission line and phase shifter composed of varactor diodes and SSPP transmission line are designed. To the best knowledge of the authors, this is the first time that the SSPP transmission line has been applied to the design of functional circuits.
学术讨论
主办单位时间地点报告人报告主题
东南大学射频与光电集成电路研究所 2012-7 东南大学 李文正楼北412 冯礼和 Ka波段接收机研究
东南大学毫米波国家重点实验室 2012-10 东南大学中山院202教室 姜鑫 梦想与抉择 – 海归教授谈留美学习工作经验及模拟集成电路行业发展趋势
东南大学毫米波国家重点实验室 2017-4 东南大学李文正楼北615 徐杰 频率可重构天线方案
东南大学射频与光电集成电路研究所 2012-4 东南大学 李文正楼北412 徐杰 毫米波功率合成技术
东南大学射频与光电集成电路研究所 2013-10 东南大学 李文正楼北412 徐杰 Q波段收发前端研究进展
信息科学与工程学院 2014-9 东南大学中山院201教室 姜鑫 射频/微波集成电路行业发展和择业选择
信息科学与工程学院 2016-7 无线谷主楼二楼大1号会议室 夏香根 Topics on Modulations for 5G and beyond
信息科学与工程学院 2016-9 无线谷1号楼1319会议室 葛晓虎 Energy Efficiency Optimization of 5G Radio Frequency Chain Systems
东南大学毫米波国家重点实验室 2016-12 东南大学李文正楼北615 徐杰 方向图可重构天线方案
     
学术会议
会议名称时间地点本人报告本人报告题目
APMC 2015 2015-12 中国南京 A Ka-band power-combined amplifier based on a six-way power divider/combiner
CSNDSP 2014 2014-7 英国曼切斯特城市大学 A 12-Channal 120-Gbs 0.18-μm CMOS Optical Receiver Front-End Amplifier
     
代表作
论文名称
Broadband transition between microstrip line and spoof SP waveguide
Wideband sub-harmonic mixer incorporating short-circuited band-pass filter
Transmission-spectrum-controllable spoof surface plasmon polaritons using tunable metamaterial parti
A Ka-band power-combined amplifier based on a six-way power divider/combiner
Low phase noise oscillator based on complementary split-ring resonators loaded quarter-mode circular
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
宋耀良 正高 教授 博导 南京理工大学
郭宇峰 正高 教授 博导 南京邮电大学
孟桥 正高 教授 博导 东南大学
李智群 正高 教授 博导 东南大学
胡庆生 正高 教授 博导 东南大学
      
答辩秘书信息
姓名职称工作单位备注
王蓉 副高 副教授 东南大学