共查询到18条相似文献,搜索用时 609 毫秒
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一种C波段大功率谐波滤波器的设计 总被引:1,自引:0,他引:1
介绍了在大功率要求下一种C波段谐波滤波器的设计方法,采用漏壁式低通滤波方式,结构上分为主波导和副波导阵。该滤波器通带内电压驻波比小,插入损耗低。该设计使得滤波器耐功率高,可靠性好,可适用于多种大功率侦察设备。 相似文献
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设计了一种X频段基于双脊波导WRD650的大功率谐波吸收滤波器,采用双脊波导到单脊波导的渐变过渡结构,利用壁漏式结构,在脊波导宽边开孔,外接次波导谐波吸收腔;利用等效集总电路分析其设计原理,依据设计原理计算出模型初始尺寸,并在HFSS软件中建模优化。按照仿真结果加工实物,利用矢量网络分析仪对其散射参数进行测量。结果表明,该滤波器回波损耗均大于11 dB,通带插损均小于1 dB,阻带隔离均大于20 dB。 相似文献
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提出用时域有限差分(FDTD)法分析窄边双脊波导主模的单模带宽。通过对宽边双脊波导带宽的分析及与相关文献报道结果的比较验证了FDTD方法分析波导带宽问题的有效性;用FDTD方法计算了脊位置、脊宽及脊高变化对窄边双脊波导主模带宽的影响,计算结果表明:与传统的双脊波导相比,窄边双脊波导减少了单模带宽,可用作脊带宽滤波器。 相似文献
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不对称脊波导截止波长的计算 总被引:9,自引:4,他引:5
将计算矩形波导和对称脊波导导内波长的横向谐振法推广用于计算不对称单脊波导的导内波长和电中心线对波导宽边几何中心线的偏置。介绍了为保证脊波导截止波长或导内波长不变的情况下,设计不对称脊波导的方法,并给出了一些计算结果和试验结果。 相似文献
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不对称脊波导的传输特性 总被引:5,自引:0,他引:5
提出了用有限差分方法分析不对称脊波导主模的截止波长和场结构图等传输特性,推导出用有限差分方法计算相关参数的公式。脊波导中主模的截止波长可随脊位置的变化而变化。文中编程计算了不对称脊波导、L型波导脊位置变化时截止波长和场结构的变化规律,给出了计算数据和曲线图。计算结果与相关文献非常吻合,证明文中提出的计算方法和计算结果是正确和可行的。 相似文献
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针对传统脊波导滤波器设计中没有考虑耦合结构频率特性导致设计精度不高的问题,文中提出了一种基于消失模耦合的脊波导滤波器设计方法。该方法将工作于消失模状态下的矩形波导结构等效为频变阻抗变换器模型,通过等效电路变换将耦合结构的频变特性影响转换为对传输线谐振腔电抗斜率参数的影响,采用逐级仿真策略确定滤波器结构尺寸,避免了耗时的全波仿真优化。最后,通过一个4阶切比雪夫特性的脊波导滤波器设计实例进行验证。全波仿真结果显示了与理论设计相同的通带内等波纹特性,验证了所提方法的有效性。 相似文献
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脊加载椭圆波导传输特性的矢量有限元法分析 总被引:1,自引:0,他引:1
采用矢量有限元法对脊加载椭圆波导的传输特性进行了分析,编程计算了圆形脊、梯形脊和三角形脊分别加载在椭圆短轴和长轴上波导的截止频率.结果表明:脊加栽在椭圆长轴上,大大减小了单模带宽,因此这种结构可作为有效的脊带宽滤波器. 相似文献
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Yu Rong Zaki K.A. Hageman M. Stevens D. Gipprich J. 《Microwave Theory and Techniques》1999,47(12):2317-2324
Full-wave mode-matching-based design of generalized ridge waveguide evanescent mode bandpass filters and their transitions for low-temperature cofired ceramic (LTCC) application is described. A modification factor is introduced in the prototype filter design to effectively overcome the filter bandwidth distortion. Design examples are given to demonstrate the validity. An S-band single-ridge waveguide filter and its transitions are simulated and successfully built in LTCC packages. Good agreement between the theory and experiment is obtained, which demonstrates the feasibility of the three-dimensional ridge waveguide filter embedding in LTCC packages. As compared with an LTCC inductive windows waveguide filter realization, the ridge waveguide filter realization shows significant advantages of smaller size and comparable loss. Design consideration and LTCC realization of the low-loss ridge waveguide filter are also provided 相似文献
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本文设计了一种新型脊波导宽带滤波器。实现了中心频率5 GHz相对带宽60%通带内回波小于-20 dB的宽带脊波导滤波器,并通过CST仿真进行优化,达到了设计目的。此类滤波器加工方便,应用低温共熔陶瓷技术可实现集成化。 相似文献
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A methodology is presented for the design of small cavity filters, relying entirely on the use of commercial general-purpose design software. Pertinent filter structures comprise resonated segments of ridge waveguide with evanescent-mode inter-resonator coupling sections, supplemented by impedance-transforming port networks. The ridge and evanescent-mode waveguide segments combine to form a metal-clad dielectric core made of either a single dielectric or a composite material. A parameterized equivalent-circuit model is used to describe each segment based on numerical three-dimensional electromagnetic field analyses. For a bandpass filter, the technique yields low passband insertion loss, an ultrawide upper stopband region, and excellent power handling. The approach provides the option to fabricate structures at low per-unit cost with the help of newly available moldable dielectric materials. The efficacy of the technique is demonstrated with an experimental 1-1.45-GHz bandpass filter. 相似文献
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A vectorial solution technique is applied to investigate the dispersion characteristics of the ridge modes of a waveguide structure comprising a slab and optical fiber. The power transmission characteristics of the device with respect to wavelength are calculated under various device parameters, such as slab index and fiber-slab separation. We discuss the effects of such parameters on the bandwidth and rejection of the notch filter produced by this structure 相似文献