共查询到19条相似文献,搜索用时 93 毫秒
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分析了现有微波大功率测量装置中定向耦合器的优缺点,提出了一种新型的用于测量微波大功率信号的双定向耦合器。该双定向耦合器可以同时测量传输信号和耦合信号,在小孔耦合的基础上利用耦合片实现信号的耦合。耦合片安装在耦合头内部,耦合头作为一个独立的装置可以根据波导的尺寸调整安装位置。通过调节耦合片与波导的距离,祸合系数可以在一定范围内调节。利用HFSS进行了全波电磁场仿真,在ISM频段利用BJ-26波导验证了设计。该双定向耦合器体积小,易于装配,特别适用于大功率、双向测量的场合。 相似文献
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设计了将太赫兹波耦合进入波导的耦合器.耦合器由金属材料铝制成,形状为中空圆锥形和圆柱形的结合.在宽带的脉冲太赫兹信号和单频的连续太赫兹信号两种情况下,模拟并实验测试了耦合器将自由空间传输的平行太赫兹波耦合进入反谐振波导,结果显示该耦合器是宽带太赫兹波耦合器.通过优化耦合器几何参数,在太赫兹时域系统下得到振幅耦合率达到71%,振幅增强因子为6.125. 相似文献
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《红外与毫米波学报》2016,(2)
设计了将太赫兹波耦合进入波导的耦合器.耦合器由金属材料铝制成,形状为中空圆锥形和圆柱形的结合.在宽带的脉冲太赫兹信号和单频的连续太赫兹信号两种情况下,模拟并实验测试了耦合器将自由空间传输的平行太赫兹波耦合进入反谐振波导,结果显示该耦合器是宽带太赫兹波耦合器.通过优化耦合器几何参数,在太赫兹时域系统下得到振幅耦合率达到71%,振幅增强因子为6.125. 相似文献
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本文将两种尺寸不同的波导相互耦合可实现宽带耦合器的原理用于GNRD波导定向耦合器的设计。根据对非对称GNRD波导耦合特性的理论分析,定性讨论了各种非对称情况对耦合特性的影响;并设计了3dB GNRD波导非对称定向耦合器。计算结果表明其在8mm波段,耦合频带比原对称时的明显平坦。 相似文献
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Double circular groove guide is a simple structure which can be used to construct directional coupler. In this paper, the coupling property of two uniformly coupled circular groove guides is studied based on the transverse resonance analysing results of closed double circular groove guide. 相似文献
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基于微型无人机雷达、精确制导武器雷达及无线通信终端设备的应用前景,设计了一种非对称主副波导定向耦合器。该耦合器采用主副波导为不同形状的等间距多孔耦合结构,将主矩形波导TE10模的信号耦合到副圆形波导TE11模中,利用相位叠加原理使得隔离端口相位达到反向相消的效果,能够得到良好的耦合度和隔离度。该耦合器中心频率为400 GHz,相对带宽为40 GHz,结果表明,定向耦合器耦合度达到-13.8~-12.8 d B,实现了弱耦合效果且耦合度稳定性较好,隔离度优于-24.5dB,直通插入损耗为-3~-2.5 dB,性能良好。 相似文献
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部分介质填充槽波导色散特性的网络分析 总被引:1,自引:0,他引:1
本文给出了部分介质填充单槽和非对称双槽波导的横向等效网络。以此为基础,用微波网络方法分析了各种槽波导的色散特性,并将所得到的数据与用其它方法得到的结果进行比较,两者吻合好。证实本方法在保持有高的计算精度的情况下极大地简化了分析和求解过程。文中通过对宽带槽波导定向耦合器的具体设计,证明了本方法在槽波导电路分析和设计中的重要实际意义。 相似文献
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《Microwave Theory and Techniques》1960,8(6):660-666
This paper describes a circular electric mode directional coupler, composed of two coaxial bifurcations in circular waveguide. The coupling coefficient of the directional coupler depends on the separation between the two bifurcations, and a hybrid junction for the circular electric mode may be obtained at the proper separation. The analysis is carried out in terms of scattering matrix elements characterizing each coaxial bifurcation. The scattering matrix elements were experimentally determined via the Weissfloch tangent method at 5000-Mc band. For convenience, experiments were carried out in sectoral waveguide instead of circular waveguide. Measured characteristics at 9000-Mc band are in good agreement with values determined by circuit calculations employing parameters of the coaxial bifurcation measured at 5000-Mc band. For the case of a hybrid junction, wide-band matching has been accomplished and verified experimentally. Applications of this directional coupler are outlined. 相似文献
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The design method of mode selective directional couplers from a transverse electric mode in a circular waveguide to the fundamental mode in a rectangular wave guide is presented in this paper. The design results for a TE01 circular mode coupler intended for use in the output power measurement of a high power gyroklystron are reported; these results indicate that more than 50-80dB directivity and sufficient suppression of unwanted modes can be obtained with a coupler less than 07m in length. The effects of frequency and rectangular wave guide size on coupler parameters are also discussed in this paper 相似文献
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A directional coupler using crystalline organic semiconductor waveguides grown by the vacuum process of organic molecular beam deposition is demonstrated. An index-matching layer placed between two coupled waveguides separated by a 1 μm gap greatly increases the coupling coefficient, significantly decreasing the coupling length and making the device very compact. Switching of 1.06 μm wavelength light from one guide to another in the coupler has been observed by pumping the surface of one guide in the coupling region with 0.514 μm 相似文献
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论述了一种宽带多孔耦合型定向耦合器,工作频段中心频率为40 GHz,相对带宽50%,拟用于射电望远镜Q波段接收机系统。该定向耦合器为一款结构紧凑的器件,采用对称的等间距多孔耦合形式,将主通道圆波导TE11模式信号耦合到耦合通道的矩形波导中,实现了小于-20 dB 耦合特性。为了对设计进行验证,对该定向耦合器进行了加工和测试。测试结果表明,在30~50 GHz 工作频段内,主通道反射系数小于-24.2 dB,且全频段内的端口耦合度保持在-20~-21 dB 之间。仿真与测试结果具有较高的吻合度,进一步证实了该设计可用于射电天文望远镜的Q波段接收机系统。 相似文献
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Ma Jianglei Yang Hong-sheng Lu Zhong-zou 《Journal of Infrared, Millimeter and Terahertz Waves》1992,13(6):933-938
On the basis of the studies of single circular groove guide and single rectangular groove guide, the coupling of the two waveguides has been researched and the characteristic equation of circular—rectangular groove guide has been given in this paper. 相似文献
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Ma Jianglei Yang Hong-Sheng Lu Zhong-zuo 《Journal of Infrared, Millimeter and Terahertz Waves》1993,14(1):129-134
Circular-rectangular groove guide is a new type of structure we have presented for coupling between circular groove guide and rectangular groove guide. In this paper, as the continuity of our previous work, the characteristic equation of circular-rectangular groove guide has been solved and the numerical results have been given and discussed. 相似文献