共查询到20条相似文献,搜索用时 31 毫秒
1.
The dominant mode in closed circular groove guide 总被引:1,自引:0,他引:1
Ma Jianglei Yang Hongsheng 《International Journal of Infrared and Millimeter Waves》1995,16(1):231-236
The structure of closed circular groove guide is similar to that of open circular groove guide, but it can prevent energy from leaking out of the guide. In this paper, the dominant mode in closed circular groove guide is considered. The characteristic equation is derived and solved and the results are discussed.The Project Supported by National Natural Science Foundation of P. R. China and National Key Laboratory of Millimeter Waves Foundation of P. R. China 相似文献
2.
Yan Hong-Sheng Jun Qian Lu Zhong-Zuo 《International Journal of Infrared and Millimeter Waves》1994,15(10):1721-1731
The variations in propagating characteristic of circular groove guide due to tolerance are analyzed by using eigen-weighted boundary integral equation method (EWBIEM). Theoretical analysis and experimental results show that as long as the tolerance of circular groove guide is not very large the variations in characteristic of circular groove guide are very small.The Project Supported by National Natural Science Foundation of P.R. China 相似文献
3.
Ma Jiangle Yang Hong-shen Zhang Zhongxi Lu Zhong-zuo 《International Journal of Infrared and Millimeter Waves》1993,14(5):1069-1076
A simple method is introduced to improve the analysing accuracy of circular groove guide. With this method, the characteristic equation of circular groove guide is derived and its solution is given and discussed.The Project Supported by National Natural Science Foundation of P.R.China 相似文献
4.
The structure of circular groove guide coupled with high-Q cavity is studied. As a new type of millimeter wave component, it can be used for wavemeter and highly stabilized circular groove guide oscillator. The design and analysis of the novel structure are given in this paper. 相似文献
5.
Ma Jianglei Yang Hongsheng 《International Journal of Infrared and Millimeter Waves》1994,15(9):1567-1572
According to the analyses of the moding properties of circular groove guide, the guide dimension for single mode operation is determined. Our results show that circular groove guide has the advantage of wide band.The Project Supported by National Natural Science Foundation of P.R. China and National Key Laboratory of Millimeter Waves Foundation of P. R. China 相似文献
6.
Ma Jianglei Yang Hong-Sheng Lu Zhong-zuo 《International Journal of Infrared and Millimeter 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.The Project Supported by National Natural Science Foundation of P. R. China 相似文献
7.
Hong Wu Jun Qian Yang Hong-Sheng Lu Zhong-Zuo 《International Journal of Infrared and Millimeter Waves》1994,15(1):229-235
The circular groove guide is one of several waveguides that will widely be used at millimeter and submillimeter waveband. The leaky antenna based on the circular groove guide is studied by the method based on a transverse equivalent network in this paper.The Project Supported by National Natural Science Foundation of P.R. China 相似文献
8.
Xue-feng Guo Hong-sheng Yang Li-cheng Cui Jing Yao 《International Journal of Infrared and Millimeter Waves》2004,25(2):393-402
In this paper, finite-difference time-domain (FDTD) method is used to calculate the driving-point impedance of radial transmission-line in circular groove guide. A simple way is used to approximate the curvilinear metal boundary of circular groove guide. And perfectly matched layer (PML) is applied on the open boundary of circular groove guide. Fine-grid is used to calculate the EM fields in the radial transmission-line in which we are interest. Discretized wave equation is used to update the tangential electric field on the boundary of coarse- and fine-grid. At last, the driving-point impedances related to different diameter of the radial transmission-line are obtained from the ratio of the Fourier transform of the voltage to the Fourier transform of the current. 相似文献
9.
Licheng Cui Hongsheng Yang 《International Journal of Infrared and Millimeter Waves》2003,24(9):1567-1576
Finite-difference time-domain (FDTD) method is used to calculate the driving-point impedance of the circular groove guide diode mount. A simple way is proposed to approximate the curvilinear metal boundary of circular groove guide. Discrete equations are obtained from the Ampere's law and Faraday's law. Perfectly matched layer (PML) is applied on the open boundary of circular groove guide. At last program is made to obtain the field components. The driving-point impedance can be achieved from the ratio of the Fourier transform of the voltage and the Fourier transform of the current. The cutoff frequency and field pattern of the dominant mode are also obtained with well agreement with the theoretical results, this verifies the validity of the FDTD program. 相似文献
10.
Ma Jianglei Yang Hong-sheng Lu Zhong-zuo 《International Journal of Infrared and Millimeter Waves》1992,13(3):319-325
On the basis of the analysis of single circular groove guide, the field configuration of double circular groove guide has been investigated, its characteristic equation has been derived and its theoretical performances have also been discussed.The Project Supported by National Natural Science Foundation of P. R. China 相似文献
11.
Ma Jianglei Yang Hong-sheng Lu Zhong-zou 《International Journal of Infrared and Millimeter 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.The Project Supported by National Natural Science Foundation of P.R. China 相似文献
12.
对曲折圆形槽波导新型慢波系统的高频特性进行了研究,通过理论分析和数值计算,得到了它的色散曲线和耦合阻抗表达式,并分析了结构参数变化对色散特性和耦合阻抗的影响。研究表明:当周期变小时色散减弱,耦合阻抗增加;而增大直波导长度时色散变弱,但同时耦合阻抗也会下降。因此较小的周期有利于改善曲折圆形槽波导慢波电路的高频特性。鉴于这种电路的耦合阻抗较低,可以适当地减小直波导长度来提高耦合阻抗。曲折槽波导结合了曲折波导散热能力强、色散特性好、容易加工和槽波导单模工作、低损耗、大尺寸等优点,在毫米波及亚毫米波段的行波管中具有较好的发展前景。 相似文献
13.
The Characteristic Equation of Corrugated Circular Groove Guide 总被引:1,自引:0,他引:1
Hong-sheng Yang Hong-hui Yan 《International Journal of Infrared and Millimeter Waves》2001,22(3):485-494
Using the mode matching technique and neglecting the space harmonics, the characteristic equation of corrugated circular groove guide is given. 相似文献
14.
FEM amplifier with a novel circular groove guide is proposed and researched both in three-dimensional nonlinear theory and numerical computation in this paper. Efficiency and bandwidth of the FEM are studied including electron beam emittance. 相似文献
15.
Zheng-Rong Xu Hong-Sheng Yang Zhong-Zuo Lu 《International Journal of Infrared and Millimeter Waves》1995,16(11):2003-2009
A novel horn antenna for millimeter waves based on circular groove guide is presented and investigated in this paper. Its radiation patterns are calculated by employing the aperture field method. The patterns obtained by experiment show agreement with calculated results. 相似文献
16.
Dominant mode characteristics of circular groove guide 总被引:1,自引:0,他引:1
Hu Chi Yang Hong-sheng Lu Zhong-zuo 《International Journal of Infrared and Millimeter Waves》1995,16(2):401-410
Circular groove guide is a kind of waveguide for millimeter waves with low loss, large dimensions, and low dispersion. In this paper, the dominant mode characteristics of it is analysed. The technique that mode macthing method combines with point matching method is used to derive the Nth-order characteristic equation of the guide. The 1st order, 2nd order and 3rd order approximate curves that the normalized cutoff wavelength of circular groove guide varies with c/a are given. The attenuation curves are given at 1mm, 1.5mm and 3mm wavelength. The numerical results are in well agreement with the experimental results published.Supported by National Science Foundation of P. R. China 相似文献
17.
Hong-hui Yan Hong-sheng Yang 《International Journal of Infrared and Millimeter Waves》1999,20(1):149-154
Using the Fourier transform and the mode matching technique, the circular groove guide is analyzed. While deriving a series of simultaneous equations basing on boundary conditions, we get the characteristic equation of this guide structure that is strict than those before. The numerical result shows that the approach presented in this paper has a good precision. 相似文献
18.
Jianglei Ma Hongsheng Yang 《International Journal of Infrared and Millimeter Waves》1995,16(8):1361-1366
A novel structure for the transition from the dominant mode in circular waveguide to that in circular groove guide is presented. The mode converter based on this structure which has low reflection coefficient is designed. The numerical result shows that the performance of this new type of transducer is improved.The Project Supported by National Natural Science Foundation of P. R. China and National Key Laboratory of Millimeter Waves Foundation of P. R. China 相似文献
19.
Yang Hong-Sheng Shen Zheng-Kun 《International Journal of Infrared and Millimeter Waves》1994,15(9):1573-1583
A transition between rectangular waveguide and circular groove guide is described. The composite transition consists of two sections. It is theoretically designed to provide both mode matching as well as low reflection coefficient. The performance of the transducer is plotted.The Project Supported by National Science Foundation of P. R. China 相似文献
20.
Ma Jianglei Yang Hong-sheng Zhang Zhongxi Lu Zhong-zou 《International Journal of Infrared and Millimeter Waves》1993,14(12):2533-2541
As the development of our previous discussion on asymmetric double circular groove guide, the second-order approximate characteristic equation of this structure has been derived. This analysis will give more accurate result.The Project Supported by National Natural Science Foundation of P. R. China 相似文献