用模式匹配法设计波导双金属膜片滤波器

双E面膜片滤波器能改善E面滤波器的高端阻带抑制特性.但是其输入输出耦合膜片往往由于尺寸过小,难以加工.采用模式匹配法设计了单双E面膜片相结合的混合型E面膜片毫米波滤波器,不仅能降低该类滤波器的加工复杂度,同时保持了双E面膜片的阻带抑制好的特性.     

Ka波段E面波导滤波器的误差研究

介绍E面波导滤波器基本结构与原理及蒙特卡罗数值模拟方法,并首次将此模拟方法与微波仿真相结合,实现对微波元件的误差分析.以Ka波段E面滤波器为例,分别对膜片的厚度、位置偏置、谐振腔长度与耦合膜片尺寸误差进行数值模拟,研究误差对性能的影响情况.最后综合设计了一款符合要求的E面波导滤波器.     

任意E面膜片不连续性及其在毫米波滤波器中的应用

本文利用矩量法和一般的网络分析技术分析了各种E面膜片不连续性。通过引入广义波导概念,自然地考虑了膜片的厚度效应,使问题的分析得到了统一。文中给出了一组正面膜片不连续性的等效电路参量曲线,基于这些曲线,设计和试制了二个W波段E面带通滤波器,实验结果与设计指标符合较好。     

毫米波E面滤波器神经网络建模方法研究

在毫米波E面滤波器的设计中,对E面膜片的建模和分析是一个关键环节。以往采用的数值分析方法虽然精度较高,但建模速度慢。提出采用径向基神经网络对膜片建模,并利用Matlab语言编写神经网络建模程序。结果表明,得到了很高的建模精度,且建模速度大大提高。因此可以将神经网络模型替代以往的分析程序,在保证精度的同时,大大提高滤波器的设计速度。     

毫米波E面膜片波导带通滤波器的精确设计

详细介绍了一种适用于毫米波段的E面膜片波导带通滤波器的精确设计方法。首先采用模式匹配法分析了矩形波导内的E面膜片,获得了相应的等效集总电路参数;随后运用综合法设计了一款工作于Ka波段的波导带通滤波器;最后加工了测试样品,实测数据与理论计算结果吻合良好,表明该方法具有令人满意的精确度。目前,利用所述方法设计的带通滤波器在某通信系统中得到应用,并取得了良好的效果。     

神经网络在毫米波E面滤波器设计中应用研究

本文采用神经网络对E面膜片进行建模,并将该模型替代滤波器设计过程中的分析程序.由于神经网络模型具有精度高、实时调用速度快等优点,因此本文所发展的E面滤波器设计方法具有设计精度高和速度快等优点.最后采用该方法设计了一个8mm E面滤波器,设计和实验结果表明该方法比较有效.     

一种220 GHz滤波器的设计

基于电感膜片矩形波导滤波器设计方法和加工流程,设计了一个220 GHz带通滤波器。滤波器采用玻璃片—硅片—陶瓷片结构,由硅片形成电感膜片结构,玻璃片、陶瓷片键合在硅片上形成闭合的谐振腔,采用集成电路的制作工艺,在加工前分析了工艺特性,优化了滤波器尺寸,避免工艺对滤波器关键尺寸的影响。采用信号源、功率计进行测试,测试结果表明,滤波器在220 GHz具有通带特性,带内损耗约为7 dB。     

Ka波段波导带通滤波器的仿真设计

介绍了一种Ka波段E面膜片波导带通滤波器。首先对该滤波器等效电路进行理论分析,并利用CST软件进行仿真优化,给出仿真曲线和测试曲线,仿真结果和测试结果吻合良好,相对宽带为2％,带内损耗小于2dB。该滤波器具有Q值高,体积小,容易加工和集成等优点。     

毫米波E面金属膜片窄带滤波器的研究与设计

传统波导滤波器是由普通电抗元件组成,其结构复杂,调试困难,成本高,不利于大批量生产。而平面电路滤波器可以在完成同等电性能的同时,克服以上缺点。本文用模式匹配和网络级联的方法对其进行了详细的分析,阐述了E面膜片波导滤波器的工作原理,给出了具体设计方法。最后用这种方法设计出一款工作于Ka波导的波导带通滤波器,并加工了实物进行测试。     

性能优良的新型E面金属膜片波导滤波器

针对目前一般的E面金属双膜片波导滤波器虽阻带性能优良却存在带宽较窄的缺点，对E面金属双膜片结构进行了分析。提出了一种在保持金属双膜片结构优良性能的基础上实现较宽带宽的E面结构。据此设计了一个阻带性能优良的Ka波段波导滤波器。测试结果和理论分析吻合较好。     

矩形波导E面金属插片滤波器的CAD技术

矩形波导E面金属插片滤波器是毫米波波段的一种重要滤波器形式。利用计算机辅助技术设计矩形波导E面金属插片滤波器,解决了传统矩形波导E面金属插片滤波器设计过程中自动化程度低,需要大量查表的问题,为这种类型滤波器的研制和生产打下了坚实的基础。采用编写的CAD程序完成一个滤波器设计实例,结果表明了用该程序设计E面滤波器的可行性。 更多还原     

波导E面金属片滤波器的优化设计

本文采用模式展开方法,导出了波导E面金属片滤波器的散射参量,进而编写了滤波器优化设计程序,设计、制造和测试了一个长三厘米滤波器,实验结果和理论结果符合得很好。本文方法考虑了高次模式通过谐振腔发生的耦合,设计的滤波器特性比较理想,在频率的低端和高端阻带衰减都较大,所以比采用变分原理导出等效网络参数然后进行综合设计的方法优越。     

E-Plane Integrated Circuit Filters with Improved Stopband Attenuation (Short Papers)

Improved stopband attenuation is achieved by thick strips, by reduced waveguide sidewall dimensions, and by double planar integrated circuits. In contrast to thick strips which may cause high passband insertion losses and filters with reduced waveguide dimensions which require additional tapers, double planar E-plane integrated circuit filters combine the advantages of low costs, high stopband, and low passband insertion losses. Computer-aided design of a four-resonator Ka -band double metal insert filter achieves a calculated stopband attenuation between 40 and 60 GHz of more than 50 dB, the calculated minimum passband insertion loss is 0.43 dB (measured 1.8 dB). Higher order mode excitation and finite thicknesses of the inserts are included in the calculations.     

E 面金属膜片波导滤波器的优化设计

本文利用等效电路的方法求得E面全金属膜片波导滤波器的初始尺寸值 ,经过对此滤波器的特性的分析结果与设计要求的比较对滤波器的尺寸加以调整 ,从而准确、快捷地完成滤波器的综合 ,对于E面金属膜片滤波器的工程设计有很大的帮助。     

Magnetically tunable rectangular waveguide E-plane integratedcircuit filters

A rigorous field theory method is described for the computer-aided design (CAD) of magnetically tunable E-plane metal-insert filters, where the waveguide sections are symmetrically loaded with ferrite slabs, and for large-gap finlines filters on a ferrite substrate. The design method is based on field expansion in suitably normalized eigenmodes which yields directly the modal scattering matrix of all discontinuities. The theory includes both higher-order mode interaction and the finite thickness of the metal inserts. Optimized data are given for magnetically tunable Ku-band metal insert and finline filter examples. The metal-insert type achieves a tuning range of its operating midband from about 14.1 to 15.7 GHz. The theory is verified by measurements     

A simplified CAD of millimeter-wave diplexer with E-plane T-junction and all-metal insert filters

An equivalent circuit theory design of a class of rectangular waveguide E-plane T-junction diplexer with E-plane all-metal insert filters is presented. Element values of equivalent circuit models of E-plane T-junction proposed in [1] are computed and approximated. The parameters of the filters designed by [2] are also given. By use of the network combining technique, the scattering matrix of the diplexer is obtained and optimized according to the diplexer specification with a novel objective function. The experimental results show a fairly good agreement with the computed results.     

Finline and Metal Insert Filters with Improved Passband Separation and Increased Stopband Attenuation

A new class of optimized finline and metal insert filters is introduced. In these filters, the ladder-type insert is located in a waveguide section which is either wider or narrower than the embedding standard waveguide. A step junction at each end forms the transition to the standard waveguide and is included in the analysis. Both filter types provide a better suppression of spurious passbands and have significantly improved stop-band attenuation. Filters with enlarged sections are useful for design at the lower end of the waveguide band, whereas the narrower version is appropriate for bandend design.     

A Novel E-Plane Waveguide Filter with Three Metal Irises

This paper presents a novel E-plane rectangular-waveguide filter with three metal irises in Ka bard. Comparing with the conventional E-plane waveguide filter with single iris, a great improvment has been made in stop-band of a band pass filter, and wider pass band compare to normal double metal irises waveguide filter. An analysis is given by mode match method and the conservation of complex power technique [1]. Computer-aided design of a new five-resonator Ka band band pass filter has been presented, good agreement has been observed between theory and measurement data.     

Bandstop filter for the H10 mode in a rectangular waveguide

A bandstop filter for the H10 mode in a rectangular waveguide is established by a stub in the E-plane. The enlargement of the bandwdth of this filter by a stepped pattern of the stub or by cascading of stub filters is outlined.