毫米波鳍线环行器的理论分析

本文采用场分量匹配法和鲁线的等值矩形波导方法，首次给出对称鳍线结构环行器的三维电磁场理论分析，计算了8mm和3mm对称鳍线环行器的外部特性，得到一些有用的数据和结论。本文还实验研究了单侧鳍线结构环行器，测试结果满意。     

鳍线阻抗不连续性的混合模散射特性

本文用混合模展开鳍线中的本征场,并应用谱域法确定主模和高次模的传播常数和谱域中的本征场,然后结合模匹配法分析鳍线阻抗不连续性的混合模散射特性。文中给出计算的单鳍前30个模,双鳍前20个模的传播常数和阻抗不连续性的主模散射参数,计算结果与文献发表的结果一致。有关数值收敛性问题亦在文中进行了讨论。     

用FDTD法及AR模型分析鳍线不连续性

本文用ＦＤＴＤ法分析了几种典型的鳍线不连续性，因鳍线的色散较大，本文用一种稳定的高阶ＤＢＣ一改善截断边界的吸收性能。为了减少计算时间，由ＦＤＴＤ算法迭代所得的较少数据建立起ＡＲ模型，收此预报了后ＦＤＴＤ的数据。     

鳍线中E面膜片不连续性的等效电路参量

本文利用横向谐振法结合变分技术全波分析了鳍线E面膜片不连续性,给出了一组工程上实用的等效电路参量曲线。     

鳍线阶梯不连续的散射特性

本文应用谱域法和谐振腔法分析了鳍线阶梯不连续性,给出了等效阶梯电纳的计算公式。这种方法具有计算简单、速度快的特点,便于CAD应用。     

用谱域导抗法计算各向异性媒质加载鳍线的特性

本文通过分析旋性介质中电磁场方程和引入傅里叶变换和坐标变换,推导得到旋电介质和旋磁介质中TE模和TM模的特性导纳,从而将谱域导抗法的分析范围扩展到旋性介质加载的鳍线结构。并得到了铁氧体加载单侧鳍线正、反向传播常数的数值解。本文的数值计算结果,对设计鳍线铁氧体器件具有参考价值。     

用谱域导抗法计算铁氧体加载鳍线的传输特性

本文从Maxwell方程出发,经过Fourier变换和坐标旋转,将铁氧体中的非寻常波分解成TE和TM波,并给出它们的波导纳。利用边界条件,忽略TE和TM波间耦合的影响后,将鳍线用一等效网络表示。本文方法与T.Itoh提出的谱域导抗法比较,在等效网络中引入了理想变压器元件。最后对铁氧体加载单侧鳍线的正反向传播常数进行了数值计算,其结果与有关文献中数据吻合得很好。     

各向异性介质基片上厚金属鳍线特性的研究

本文分析了各向异性介质基片上考虑金属鳍厚度的单侧鳍线和耦合侧鳍线的特性。应用横向等效传输线分析法推导出求解传播常数的矩阵方程,最后结合Galerkin′s方程算出了几组传播常数色散特性曲线。     

一种新颖紧凑的微带-鳍线过渡

提出一种新颖的微带-鳍线过渡结构,该模型结构简单,尺寸紧凑,可以在较宽的频率范围内实现较低的插入损耗和回波损耗.对微带-单侧鳍线过渡的电路原理和传输特性进行了分析与研究,在此基础上拓展设计了微带-双侧鳍线和微带-单脊鳍线的过渡结构,并将具用于宽带鳍线谐波混频器中.在18～32GHz频率范围内,对一个背靠背对称结构的微带-单侧鳍线过渡电路进行测试,单个过渡电路的插入损耗约小于0.8dB.这种过渡设计在微波毫米波鳍线混合集成电路设计中,可以得到广泛的应用.     

微带线鳍线设计数据册

本书发表了用谱域中的Galerken全波方法计算的微带线、悬置微带线、槽线和单侧鳍线的归一化波导波长的色散特性和阻抗特性数据。全书共有44种表格,表1—14是微带线和耦合微带线,表15—26是悬置微带和耦合悬置微带线,表27—30是槽线和耦合槽线,表31—44是单侧鳍线和耦合单侧鳍线。这些表格基本上给出了常用结构尺寸、基片介电系数和使用频率范围的特性数据。本书可供从事高频、厘米波、毫米波技术的工程设计者、上述专业的专科生、本科生及研究生和教师设计时参考。     

An Accurate, Unified Solution to Various Fin-Line Structures, of Phase Constant, Characteristic Impedance, and Attenuation

The analysis of several fin-line configurations (unilateral fin-line, bilateral fin-line, antipodal fin-line, and coupled fin-lines) has been completed accurately. In this unified method, propagation constant is achieved via the generalized spectral domain technique where the basis functions for the bounded and unbounded fields are chosen to be trigonometric functions and Legendre polynomials, respectively. The conduction loss and dielectric loss solution for the first time are found through a perturbation method. The conductor loss so derived is believed to be sufficiently accurate for practical purposes. Characteristic impedances of these transmission lines using tentative definitions have been presented. The CPU time on an IBM 360/65 for calculation of the mentioned parameters does not exceed five seconds if the fourth-order solution in the spectral analysis gives the required accuracy. The programs are also capable of detection of higher order modes.     

Hybrid Fin-Line Matching Structures

Two transitions between unilateral and bilateral fin-line mounted back to back show unique features for impedance transformation. The series reactance of the equivalent T-circuit are theoretically shown to be capacitive. This is exploited by designing a broad-band switch with two p-i-n diodes. Its isolation is about 20 dB throughout the Ku-band.     

Double-slot fin-line structure for millimeter wave applications

This paper presents a rigorous analysis of a new fin-line structure which has two slots in the metal coating of the substrate. The dispersion and characteristics impedance are computed for the two independent normal modes of excitation. This structure should find extensive applications in the construction of fin-line components such as directional couplers and filters at millimeter wave frequencies.     

Une nouvelle ligne intégrable millimétrique: la ligne à ailettes

The fin-line structure is a special printed transmission line for millimeter wave integrated circuits. In this paper, a comparison between fin-line and other lines like waveguide and microstrip is presented. The spectral domain approach is used to determine the properties of the fin-line. The dispersion curves, characteristic impedance and power distribution are presented. The numerical solution converges rapidly in all the cases investigated. Some experimental results are reported. The agreement of measured and computed results is very satisfactory.     

6毫米波段鳍线体效应管振荡器

本文利用直线法(method of lines)对不对称单脊鳍线的特性进行了分析。设计了一种6mm波段鳍线体效应管振荡器。在频率为49.2GHz左右得到最大功率为60mW,且有约1GHz的机械调谐带宽。     

提高鳍线电路隔离度的几种措施

本文介绍了改进鳍线结构以提高隔离度的３种方法。测试结果表明，这些方法可以提高鳍线电路隔离度大约１０ｄＢ，而不会影响插入损耗。     

Theory and Design of Low-Insertion Loss Fin-Line Filters

A design theory is described for low-insertion loss fin-line filters that includes both higher order mode propagation and finite thickness of the dielectric substrate and the metallic fins. Design data for three-resonator type fin-line filters with several substrate thicknesses are given for midband frequencies of about 15, 34, and 66 GHz. The measured insertion losses in the passband are 0.25, 0.5, and 1.3 dB, respectively, for these three frequencies.     

A New Fin-Line Ferrite Isolator For Integrated Millimeter-wave Circuits

A ferrite isolator in fin-line technique is investigated both theoretically and experimentally. Since fin-line field distributions exhibit similar properties, the realilzation of a field displacement isolator is possible applying the principles of operation known from metal waveguide isolators. A field expansion method for a simplified isolator model is presented for the investigation of the field theoretical problem. Furthermore the feasibility of the fin-line field displacement approach for the realization of an isolator is demonstrated experimentally at the model frequency of 11 GHz.