DocumentCode :
1803682
Title :
Design and simualtion of a Ku-band input coupling structure TE10 → TE11 for gyro-TWT
Author :
Geng, Zhi-Hui ; Su, Y.N. ; Du, C.H. ; Xu, S.-X. ; Xue, Q.-Z. ; J, F.
Author_Institution :
Inst. of Electron., Chinese Acad. of Sci., Beijing
Volume :
1
fYear :
2008
fDate :
21-24 April 2008
Firstpage :
268
Lastpage :
269
Abstract :
In this paper, the design and simulation of a Ku- band input coupling structure TE10 OrarrTE10 O for the gyrotron- traveling-wave-tube (gyro-TWT) amplifier is presented in detail. The input mode TE10 O from the rectangular R180 is converted into the circular polarized mode TE10 O by the input coupling structure, which consists of the mode converter part and the mode polarized part. It is a quite complicated process to optimize the input coupling structure since the parameters such as the disk thickness of the windows, the space between the disk and the axis of the waveguide, the radius of the waveguide, the length of the mode polarizer and so on, are all adjustable reciprocally. In order to reduce the reflection loss and expand the bandwidth of the input port the matched method of the phase and the amplitude is adopted in the process of designing the input coupling structure. With the optimization of the parameters the bandwidth of the input coupling structure is equal to about 1.0 GHz and 2.0 GHz respectively when the VSWR (voltage standing- wave ratio) of the input port is equal to 1.2 and 1.4, which also corresponds to the 6.1% and 12.1% of the centre frequency respectively.
Keywords :
travelling wave tubes; Ku-band input coupling structure; circular polarized mode; gyro TWT amplifier; gyrotron traveling wave tube; waveguide; Bandwidth; Broadband amplifiers; Frequency; Impedance matching; Millimeter wave communication; Polarization; Process design; Reflection; Tellurium; Waveguide components; Simulation; gyro-TWT; input coupling structure; ku-band;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave and Millimeter Wave Technology, 2008. ICMMT 2008. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-1879-4
Electronic_ISBN :
978-1-4244-1880-0
Type :
conf
DOI :
10.1109/ICMMT.2008.4540358
Filename :
4540358
Link To Document :
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