W频段宽带三倍频器及Q频段宽带四倍频器研究

【作者】 吴伟；

【导师】 谢俊；

【作者基本信息】 电子科技大学 ， 无线电物理， 2006， 硕士

【摘要】 本文综述了毫米波特点，毫米波倍频器的发展现状，分析了几种通常采用的倍频方式，并以此为依据结合课题需要和现实条件提出了采用平衡式二级管对反向并联的W频段宽带三倍频器设计方案，及主要由两个倍频单片级联而成的Q频段四倍频器设计方案。设计中从各个部件的基本原理出发确定具体电路，再根据仿真、调试、测量结果修正电路，最终完成了电路设计工作。本论文主要分两部分，第一部分是W频段宽带三倍频器研究，主要组成部分为：Ka频段宽带波导微带过渡，前置放大器，低通滤波器以及匹配支节，用Agilent HSCH-9161肖特基势垒检波二极管设计的三倍频器，在W频段实现了平均—20dBm左右的输出功率。Ka频段波导微带过渡采用垂直于波导宽边的E面探针结构，前置放大器选用性能优良的AMMC—5040功放单片，并为其设计了较为紧凑的直流驱动电路，采用传输线加载扇形块形式设计的低通滤波器，用于通过25—36.7GHz的基波，抑制三次谐波(75-110GHz)，主要采用二极管对反向并联方式设计的无源二倍频器，输出采用WR—10减高波导，第二部分为Q频段宽带四倍频器的设计，通过三次方案的不断改进，在Q频段实现了绝大部分频点高于10dBm的功率输出，谐波抑制大于20dBc。其中，第一次方案，采用UMS公司CHX—2089与无源宽带180°巴仑二倍频级联，最后信号经过放大输出，设计了面积很小的单片驱动电路，尝试分析设计了采用共面波导一槽线过渡的宽带巴仑结合DMK—2790设计的无源二倍频器，第二次和第三次方案主要利用CHX—2089和Minix公司XX—1000倍频单片级联倍频。同样在很小的面积内，设计了单片驱动电路，实现单一正压12V输入情况下，满足各个单片工作所需的各脚直流驱动，结合实验结果不断调整驱动电路。 最终设计制作完成的两个倍频器可以与国内现有的40GHz以内的信号源结合，将工作频段扩展到Q频段及W频段，满足更高频段的应用需求。更多还原

【Abstract】 The article mainly describes the property of millimeter wave and millimeter wave multiplier’s nowadays development at the first chapter. It also analyses several common multiplying methods associated with the subject’s requirement and the realistic conditions according to which a proposal is confirmed that W-band tripling of one pair of parallel connectable diode and Q-band quadrupling of two doubler of MMIC. Electrical circuit’s design is accomplished by simulations on software and debugging in experiments. There are two parts included. The first part is W-band broadband tripler design. It’s about of Ka-band waveguide-to-microstrip transition, prepositive-amplifier designed by AMMC-5040, the Ka-band lowpass filter and matching circuit design, composed of tripler designed by detector diode of HSCH-9161 in W-band maximum output power about -20dBm is obtained. The Ka-band waveguide-to-microstrip transition is E-plane probe form. AMMC-5040 is prepositive-amplifier, it’s driver circuit’s area is very small. The radial line lowpass filter, which passing the fundamental signal (25-36.7GHz), is used to prevent third harmonics components (75-110GHz) from returning to input circuit. The core component is the anti-parallel Schottky-detector diode pairs. Output signal is transited by reduced-high WR-10 waveguide; The Second part is called Q-band broadband quadrupler design. There are three plans, output power higher than 10dBm is obtained at most frequency dot of Q-band, and harmonic components-reject is greater than 20dBc. On the first plan, the quadrupler was made up of UMS’s CHX-2089 MMIC multiplier and doubler by coplanar waveguide to slotline balun and DMK-2790. The driver circuit is very small. On the second and third plan, the quadrupler was made up of UMS’s CHX-2089 and Minix’s XX-1000 MMIC multiplier. The driver circuit’s area still is very small. For two MMIC doublers, the driver circuit has only one input port of+12V.The W-band tripler and Q-band quadrupler can be used extend the signal from domestic signal resource within 40GHz for the demand of user.更多还原