外文翻譯--過(guò)模彎曲圓波導(dǎo)高功率模式轉(zhuǎn)換器（原文）

1、1 23Journal of Infrared, Millimeter, and Terahertz WavesISSN 1866-6892J Infrared Milli Terahz Waves DOI 10.1007/s10762-014-0082-zHigh-power Mode Converter of Overmoded Bent Circular WaveguideXin-Jian Niu, Li-Xuan Wang, Y

2、ing-Hui Liu, Xian-Neng Zhu & Xin-Hua YuHigh-power Mode Converter of Overmoded Bent Circular WaveguideXin-Jian Niu & Li-Xuan Wang & Ying-Hui Liu & Xian-Neng Zhu & Xin-Hua YuReceived: 3 March 2014 /Acce

3、pted: 3 June 2014 # Springer Science+Business Media New York 2014Abstract Based on the mode coupling theory, a TE01—TM11 mode converter was designed and optimal results were obtained. In this paper, bandwidth of mode con

4、verter with axis exponential structure is the largest, and mode converter with axis sinusoidal structure is the most compact in the case of the center frequency is 28GHz and the waveguide radius is 16mm. If the bending a

5、ngle between input port and output port of mode converter was demanded for 90°, mode converter with axis parabola structure had the characteristics of compact structure, higher mode purity and larger relative bandwi

6、dth. Meanwhile, we found that the converter could be also used as TE11 mode transition with transmission efficiency above 99%. But due to bending angle of this structure was restricted, its center frequency and waveguide

7、 radius had the obvious corresponding relation.Keywords Circular waveguide . 90° bend . Mode converter. Transition1 IntroductionGyrotron gets rapid development in the recent years. because of its peak power, average

8、 power, gain, efficiency and bandwidth are relatively higher than other kinds of Gyrotron tubes, gyroklystron is always used as power source of the millimeter wave radar, phased array radar, the millimeter wave high perf

9、ormance communication system, and controlled thermonuclear fusion system [1]. However, the output mode of gyroklystron is generally TE01 mode or TE02 mode which is inconvenient to be used directly thus external high powe

10、r mode converters areJ Infrared Milli Terahz Waves DOI 10.1007/s10762-014-0082-zThis work has been supported in part by two grants of the National Natural Science Fund Committee of China (Grant Numbers: 61161002 and 1120

11、5026).X.<J. Niu (*): L.<X. Wang: Y.<H. Liu: X.<N. Zhu School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China e-mail: niuxinjian@yeah.netX.<H. Yu Sch