Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7224048
Zaojin Zeng, Zhou Lin, L. Wenjun, Chen Hongbin
A three dimension high frequency circuit of an W band extended interaction klystron amplifier (EIA) is designed. With an electron beam of 17 kV and 0.34 A, and an input microwave power of 30 mW at 94.77 GHz, an average power of 580 W with power conversion efficiency of 10.03% , gain of 42.6 dB, 3dB Instantaneous bandwidth of more than 150 MHz is obtained. However, a peak output power of 50 mW is obtained by experiment. Based on the experiment result, optical system and RF circuit are optimized. Via optimization, a beam transmission of 100% is achieved, and with an electron beam of 18 kV and 0.28 A, and an input microwave power of 30 mW at 94.95 GHz, an average power of 374 W is obtained.
{"title":"Design and optimization of a W-band extended interaction klystron amplifier","authors":"Zaojin Zeng, Zhou Lin, L. Wenjun, Chen Hongbin","doi":"10.1109/IVEC.2015.7224048","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224048","url":null,"abstract":"A three dimension high frequency circuit of an W band extended interaction klystron amplifier (EIA) is designed. With an electron beam of 17 kV and 0.34 A, and an input microwave power of 30 mW at 94.77 GHz, an average power of 580 W with power conversion efficiency of 10.03% , gain of 42.6 dB, 3dB Instantaneous bandwidth of more than 150 MHz is obtained. However, a peak output power of 50 mW is obtained by experiment. Based on the experiment result, optical system and RF circuit are optimized. Via optimization, a beam transmission of 100% is achieved, and with an electron beam of 18 kV and 0.28 A, and an input microwave power of 30 mW at 94.95 GHz, an average power of 374 W is obtained.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223880
H. Yin, Jin Xu, Yanyu Wei, Y. Gong
Photonic crystal cavity is studied to replacing the open cavity of Orotron for enhancing quality factor. A triangle two dimensional photonic crystal cavity with metal grid is analyzed. The results prove that the quality factor of the frequencies in photonic band gap is much higher than those out of the band gap, and suggest the photonic crystal cavity is a candidate for Orotron.
{"title":"Photonic crystal cavity for orotron","authors":"H. Yin, Jin Xu, Yanyu Wei, Y. Gong","doi":"10.1109/IVEC.2015.7223880","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223880","url":null,"abstract":"Photonic crystal cavity is studied to replacing the open cavity of Orotron for enhancing quality factor. A triangle two dimensional photonic crystal cavity with metal grid is analyzed. The results prove that the quality factor of the frequencies in photonic band gap is much higher than those out of the band gap, and suggest the photonic crystal cavity is a candidate for Orotron.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"35 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128199372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7224024
Zhiwei Zhao, Xuehua Li
Co-doped ZnO thin films fabricated by nanocluster-beam technique were annealed at 200, 400 and 700°C and the influence of temperature has been investigated. AFM images and UV absorbance spectra were carried out. Co-doped ZnO exhibited ferromagnetic at room temperature, and the saturation magnetization of films was also studied following the changing of annealing temperatures.
{"title":"Influence of annealing on Co-doped ZnO DMSs thin films synthesized by nanocluster-beam technique","authors":"Zhiwei Zhao, Xuehua Li","doi":"10.1109/IVEC.2015.7224024","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224024","url":null,"abstract":"Co-doped ZnO thin films fabricated by nanocluster-beam technique were annealed at 200, 400 and 700°C and the influence of temperature has been investigated. AFM images and UV absorbance spectra were carried out. Co-doped ZnO exhibited ferromagnetic at room temperature, and the saturation magnetization of films was also studied following the changing of annealing temperatures.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131557579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223794
M. Dal Forno, Sami G. Tantawi, R. Ruth, A. Jensen
The radial klystron is a multi-dimensional rf source where the beam is generated by a cylindrical gun and it expands along the radial dimension. The space charge repulsion forces are balanced in the azimuthal direction. We present the design of a low-voltage klystron, showing the single cavity stability and high efficiency.
{"title":"Design and analysis of a radial X-band klystron","authors":"M. Dal Forno, Sami G. Tantawi, R. Ruth, A. Jensen","doi":"10.1109/IVEC.2015.7223794","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223794","url":null,"abstract":"The radial klystron is a multi-dimensional rf source where the beam is generated by a cylindrical gun and it expands along the radial dimension. The space charge repulsion forces are balanced in the azimuthal direction. We present the design of a low-voltage klystron, showing the single cavity stability and high efficiency.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116497339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223847
Zhao-Jun Zhu, Wang Liang, Shangyang Li, Xue-ling Jing, B. Jia
In this paper, the ridge-loaded helix slow-wave-structure (SWS) used in microwave power module (MPM) is presented. Based on the finite vane model, the loaded ridge and the support rod in ridge are equalized to the sector waveguides with regard to the helix tape thickness. The dispersion characteristic equation is newly derived. The calculation results meet the measurements very well.
{"title":"Analysis of an inhomogenously ridge-loaded helix SWS used in MPM","authors":"Zhao-Jun Zhu, Wang Liang, Shangyang Li, Xue-ling Jing, B. Jia","doi":"10.1109/IVEC.2015.7223847","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223847","url":null,"abstract":"In this paper, the ridge-loaded helix slow-wave-structure (SWS) used in microwave power module (MPM) is presented. Based on the finite vane model, the loaded ridge and the support rod in ridge are equalized to the sector waveguides with regard to the helix tape thickness. The dispersion characteristic equation is newly derived. The calculation results meet the measurements very well.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123568296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223780
S. Meyne, P. Birtel, A. Jacob
A folded-waveguide delay line is proposed for traveling-wave tubes. It is intended for satellite communications at Q-band, thus aiming for high output power and efficiency. The delay line is optimized using Adaptive Simulated Annealing, and interaction is simulated using a large-signal tool.
{"title":"Q-band high-power traveling-wave tube with optimized folded-waveguide delay line","authors":"S. Meyne, P. Birtel, A. Jacob","doi":"10.1109/IVEC.2015.7223780","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223780","url":null,"abstract":"A folded-waveguide delay line is proposed for traveling-wave tubes. It is intended for satellite communications at Q-band, thus aiming for high output power and efficiency. The delay line is optimized using Adaptive Simulated Annealing, and interaction is simulated using a large-signal tool.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128231348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223949
Q. Hu, Tao Huang, Jianqing Li, Zhonghai Yang, Bin Li
Using EOS, the whole electron optical system of the V band TWT has been designed.
利用EOS设计了V波段行波管的整个电子光学系统。
{"title":"The electron optical system analyzing of the V Band TWTV using EOS","authors":"Q. Hu, Tao Huang, Jianqing Li, Zhonghai Yang, Bin Li","doi":"10.1109/IVEC.2015.7223949","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223949","url":null,"abstract":"Using EOS, the whole electron optical system of the V band TWT has been designed.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129204496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223834
Tong Feng, Dongping Gao, Zhaochuan Zhang
A cooling system of a high-power Continuous Wave Magnetron (CWM) is devised with theoretical and numerical simulations. The temperature and heat distribution of the cavity is obtained utilizing ANSYS, and that is consistent with the situation under practical operation.
{"title":"Thermal analysis of a high-power Continuous Wave Magnetron cavity","authors":"Tong Feng, Dongping Gao, Zhaochuan Zhang","doi":"10.1109/IVEC.2015.7223834","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223834","url":null,"abstract":"A cooling system of a high-power Continuous Wave Magnetron (CWM) is devised with theoretical and numerical simulations. The temperature and heat distribution of the cavity is obtained utilizing ANSYS, and that is consistent with the situation under practical operation.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127292636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223761
A. Yelizarov, Y. Pchelnikov, V. N. Karavashkina, R. V. Shaymardanov
In this paper, discuss the use of slow-wave structure “coaxial ribbed line” as a medical radiator for treatment of urological diseases. The design of the microwave radiator based on the ribbed rod with a tapering slot in the external electrode is proposed. The results of computer modeling in the program Ansoft HFSS are shown. The usefulness of the developed radiator for the internal organs treatment is considered also.
{"title":"Medical application of microwave radiator on coaxial ribbed line","authors":"A. Yelizarov, Y. Pchelnikov, V. N. Karavashkina, R. V. Shaymardanov","doi":"10.1109/IVEC.2015.7223761","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223761","url":null,"abstract":"In this paper, discuss the use of slow-wave structure “coaxial ribbed line” as a medical radiator for treatment of urological diseases. The design of the microwave radiator based on the ribbed rod with a tapering slot in the external electrode is proposed. The results of computer modeling in the program Ansoft HFSS are shown. The usefulness of the developed radiator for the internal organs treatment is considered also.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"35 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125726155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-08-27DOI: 10.1109/IVEC.2015.7223766
Jianghua Zhang, S. Illy, I. Pagonakis, A. Malygin, A. Samartsev, T. Rzesnicki, G. Gantenbein, G. Dammertz, B. Piosczyk, M. Thumm, J. Jelonnek
In order to evaluate the emission inhomogeneity of a thermionic gyrotron emitter, three mathematical treatments of the current-voltage characteristics (CVC) have been investigated and will be presented in this paper. Results for three different gyrotrons and for different emitter temperatures based on experimental data and mathematical treatment will be considered. The relation between the effective emission inhomogeneity and the work function distribution is numerically calculated.
{"title":"Evaluation of gyrotron cathode emission inhomogeneity from current-voltage characteristics","authors":"Jianghua Zhang, S. Illy, I. Pagonakis, A. Malygin, A. Samartsev, T. Rzesnicki, G. Gantenbein, G. Dammertz, B. Piosczyk, M. Thumm, J. Jelonnek","doi":"10.1109/IVEC.2015.7223766","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223766","url":null,"abstract":"In order to evaluate the emission inhomogeneity of a thermionic gyrotron emitter, three mathematical treatments of the current-voltage characteristics (CVC) have been investigated and will be presented in this paper. Results for three different gyrotrons and for different emitter temperatures based on experimental data and mathematical treatment will be considered. The relation between the effective emission inhomogeneity and the work function distribution is numerically calculated.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114980793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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