STUDY OF LOSS CHARACTERISTIC OF RECTANGULAR RIDGED WAVEGUIDE BY FINITE ELEMENT METHOD
Wang Lei1, Chen Xiaoqiang1, Liu Haichuan2, Cui Jianghan3
1. School of Automation and Electrical Engineering Lanzhoujiaotong University, Gansu Lanzhou 730070, China;
2. School of Electronic and Information Engineering Lanzhoujiaotong University, Gansu Lanzhou 730070, China;
3. School of Optoelectronic Yantai University, Shandong Yantai 264000, China
Loss characteristic is one of the important characteristics of ridged waveguide, so attenuation constant and power handling capability are major parameters. Attenuation constant and power handling capability are analyzed and calculated using the finite element method in single and double rectangular ridged waveguides of TE mode. Calculating data and curves in different structure dimensions of ridged waveguides when working frequency and cutoff wavelength change are also presented in this paper. The results show that in both single and double rectangular ridged waveguides, normalized attenuation constant decreases as the frequency increases, and standardized attenuation constant monotonously increases as normalized cutoff wavelength increases. Power handling capability monotonously decreases as normalized cutoff wavelength increases, but it increases as the distance and the width of ridges increases. It can be obtained from the calculating data that single ridged waveguides have better loss characteristic compared with double ridged waveguides. Numerical results provide an extension to the existing data of ridges waveguides and considered to be helpful in design and practical applications.
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