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2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)最新文献

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Thermal Analysis of Magnetron Injection Gun for 170GHz Gyrotron 170GHz回旋管磁控管喷射枪热分析
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008271
Chao Tang, Hui Wang, X. Niu, D. Wan, Ying-hui Liu, Jianwei Liu
{"title":"Thermal Analysis of Magnetron Injection Gun for 170GHz Gyrotron","authors":"Chao Tang, Hui Wang, X. Niu, D. Wan, Ying-hui Liu, Jianwei Liu","doi":"10.1109/UCMMT47867.2019.9008271","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008271","url":null,"abstract":"The 170GHz gyrotron presented in this paper has an operating voltage of 75kV and a beam current up to 45A, which requires the cathode emission temperature to reach above 1000 °C. At such a high temperature, thermal expansion of the electron gun is bound to occur. In this paper, ANSYS Workbench and COMSOL Multiphysics were used to conduct a thermal analysis of the electron gun. According to the analysis results, the filament power, number and position of the electron gun structure were optimized to meet the design requirements. The maximum value of the total deformation of the overall structure of the electron gun is about 0.06mm, and the total deformation of the cathode emission belt is about 0.054mm. Besides, the thermal analysis results obtained by the two software are compared; the simulation results agree well. The deformation is within the acceptable range, which has little influence on the performance of the electron gun.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"534 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114389824","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}
引用次数: 2
A 37–42 GHz Continuous Tunable Phase Shifter in 150 nm GaAs pHEMT 150nm GaAs pHEMT 37 - 42ghz连续可调谐移相器
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008321
Zeqi Qiu, Jun Liu, Hong Xu, G. Su, Lingling Sun
{"title":"A 37–42 GHz Continuous Tunable Phase Shifter in 150 nm GaAs pHEMT","authors":"Zeqi Qiu, Jun Liu, Hong Xu, G. Su, Lingling Sun","doi":"10.1109/UCMMT47867.2019.9008321","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008321","url":null,"abstract":"A continuous tunable low loss phase shifter with a relative phase shift range of 360° is presented in this paper. This phase shifter consists 3-bit digital phase shifter cell and a 45° continuous tunable analog phase shifter cell. A SPDT switch is used to switch the signal path. The composite right/left hand transmission line is employed in analog phase shifter cell to achieve the low path loss and the compact layout. The proposed phase shifter is implemented with 0.15 um GaAs pHEMT process. The maximum power consumption of the phase shifter is 63 mW with a 2.5 V supply voltage. The post layout simulation shows that the phase shifter achieves 360° phase shift, and the phase error is better than 2.62° of the 3-bit digital phase shifter and the loss is better than −12.8 dB. The proposed phase shifter achieves an operating bandwidth of 37–42GHz which can be applied to the 5G communication.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129816452","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}
引用次数: 0
Low Cost Bowtie Apertures for 18–40 GHz Spectrum Sensing and Monitoring 用于18-40 GHz频谱传感和监测的低成本领结孔
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008323
Qi Wu
{"title":"Low Cost Bowtie Apertures for 18–40 GHz Spectrum Sensing and Monitoring","authors":"Qi Wu","doi":"10.1109/UCMMT47867.2019.9008323","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008323","url":null,"abstract":"Two bowtie aperture antennas for 18–40 GHz spectrum sensing and monitoring are presented in this paper. The antennas are based on low cost printed circuit board, and coplanar waveguide (CPW) is used to feed the bowtie apertures. The antenna with nearly omni-directional radiation patterns has very small dimensions of 11 mm × 6.4 mm × 0.8 mm. For conformal installation on platforms or building walls, a plane reflector is added to the bowtie aperture, and an array of periodic patches is adopted as a superstrate for improving the radiation pattern and impedance matching. This unidirectional version has small dimensions of 12 mm × 8 mm × 2.8 mm. The proposed lost cost antennas are useful for spectrum monitoring applications as they are small in size, broadband, efficient, and flexible for installation.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114383065","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}
引用次数: 2
A Q-Band Self-Biased LNA in 0.1-μm GaAs pHEMT Technology 基于0.1 μm GaAs pHEMT技术的q波段自偏置LNA
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008317
Zuojun Wang, Debin Hou, Jixin Chen, Zhe Chen, P. Yan, Li Zhang, W. Hong
{"title":"A Q-Band Self-Biased LNA in 0.1-μm GaAs pHEMT Technology","authors":"Zuojun Wang, Debin Hou, Jixin Chen, Zhe Chen, P. Yan, Li Zhang, W. Hong","doi":"10.1109/UCMMT47867.2019.9008317","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008317","url":null,"abstract":"This paper describes a wideband Q-band low noise amplifier (LNA) using the 0.1-μm gallium arsenide (GaAs) pseudomorphic high electron mobility transistor (pHEMT) technology. The LNA is implemented with a 4-stage self-biased common-source (CS) topology. A measured amplifier achieves a peak power gain of 28 dB, with a 3-dB bandwidth of 15 GHz centered at 43 GHz. The amplifier exhibits an output 1 dB gain compression point of 9.6 dBm. The on-wafer measured noise figure stays under 2.8 dB over the 3-dB bandwidth. An LNA module is designed and fabricated based on the chip. To the best of the authors' knowledge, the LNA exhibits one of the lowest noise figure among other reported wideband Q-band LNA using the same technology.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130841382","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}
引用次数: 7
Gaussian beam modes analysis for uncertain off-axis mirror's parameters 不确定离轴反射镜参数的高斯光束模式分析
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008333
Yiyang Zheng, Yuan Yao, Tianyang Chen, Junsheng Yu, Xiao-dong Chen
{"title":"Gaussian beam modes analysis for uncertain off-axis mirror's parameters","authors":"Yiyang Zheng, Yuan Yao, Tianyang Chen, Junsheng Yu, Xiao-dong Chen","doi":"10.1109/UCMMT47867.2019.9008333","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008333","url":null,"abstract":"In quasi-optical system, the co-polarization and cross-polarization caused by off-axis mirrors should be paid attention to seriously, When we design a reflector system we need to know the parameters of a mirror (like focal length, position or others) in advance so that we can formulate the input and output fields even the data we need by the known parameters of system. In this paper, we will improve an existing Gaussian beam mode analysis (GBMA) to apply in the opposite case, which we don't know the parameters of a mirror. By using its computing method, we can also get the optimal value of the parameters about the uncertain mirror in the system with cross-polarization and co-polarization the first mirror generated. In order to verify the accuracy of this method, we will compare the cross-pol isolation in GBMA and the physical optics (PO) in commercial software GRASP10 with the results' value and the results' curve change.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130383761","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}
引用次数: 2
InGaAs/AlAs Resonant Tunneling Diodes with Very High Negative Differential Conductance for Efficient and Cost-Effective mm-Wave/THz Sources 具有非常高负差分电导的InGaAs/AlAs谐振隧道二极管，用于高效和经济的毫米波/太赫兹源
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008338
S. Muttlak, O. Abdulwahid, J. Sexton, M. Missous
{"title":"InGaAs/AlAs Resonant Tunneling Diodes with Very High Negative Differential Conductance for Efficient and Cost-Effective mm-Wave/THz Sources","authors":"S. Muttlak, O. Abdulwahid, J. Sexton, M. Missous","doi":"10.1109/UCMMT47867.2019.9008338","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008338","url":null,"abstract":"The work reported here demonstrates double barrier InGaAs/AlAs resonant tunneling diodes with both high current density and negative differential conductance features. The simplicity of the device epitaxial structures exploited in this work (avoiding graded or/and quaternary layers) makes it attractive for manufacturing. An extracted negative differential conductance of 95 mS/ μm2 was deduced for RTD sample #327. This device had a high current density of 10.8mA/μm2 while still maintaining an excellent PVCR of 5, one of the highest ever reported for such a high current density making the diode suitable for low-cost mm-wave/THz regime applications. These prominent features boost the estimated intrinsic cut-off frequency of the device beyond 2THz for a relatively large mesa size of 2 μm2.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116620930","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}
引用次数: 1
A W-band Compact Circularly Polarized Horn Antenna 一种w波段紧凑圆极化喇叭天线
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/ucmmt47867.2019.9008342
Chao Shu, Shaoqing Hu, Yuan Yao, Xiao-dong Chen
{"title":"A W-band Compact Circularly Polarized Horn Antenna","authors":"Chao Shu, Shaoqing Hu, Yuan Yao, Xiao-dong Chen","doi":"10.1109/ucmmt47867.2019.9008342","DOIUrl":"https://doi.org/10.1109/ucmmt47867.2019.9008342","url":null,"abstract":"This paper presents our study on a compact circular polarized horn antenna working in W-band which can generate Left Hand Circular Polarization (LHCP) with wide impedance bandwidth and 3-dB axial ratio bandwidth. And better power-handling capability and structure rigidity are also expected when compared with septum-based CP antennas. The preliminary simulation results show that the reflection coefficient below −21 dB and axial ratio below 3 dB from 75.7 GHz to 110 GHz can be achieved while the directivity is 17±1.2 dBic.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115440611","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}
引用次数: 2
Electromagnetic Vortex Imaging Based on Coupled OAM Beams at Millimeter-Wave Frequencies 基于毫米波频率耦合OAM波束的电磁涡旋成像
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008365
Hongyan Liu, Kang Liu, Hongqiang Wang, B. Deng
{"title":"Electromagnetic Vortex Imaging Based on Coupled OAM Beams at Millimeter-Wave Frequencies","authors":"Hongyan Liu, Kang Liu, Hongqiang Wang, B. Deng","doi":"10.1109/UCMMT47867.2019.9008365","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008365","url":null,"abstract":"In this paper, an electromagnetic (EM) vortex imaging method based on dual opposite OAM beams is developed. Firstly, the generation approach and radiation characteristics of dual-opposite state OAM beams are studied. Subsequently, the imaging model in multiple-in-multiple-out mode is established accordingly. The point spread function (PSF) is analyzed, and the imaging method based on fast Fourier transform (FFT) is proposed to reconstruct the target profiles. Simulation results show good agreement with theoretical analyses. The proposed imaging scheme can benefit the design of OAM-based radar systems and promote its applications in remote sensing realms.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114876070","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}
引用次数: 0
Novel Electroabsorption Modulator Design Based on Coplanar Waveguide Configuration 基于共面波导结构的新型电吸收调制器设计
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008337
Ali Al-Moathin, L. Hou, J. Marsh
{"title":"Novel Electroabsorption Modulator Design Based on Coplanar Waveguide Configuration","authors":"Ali Al-Moathin, L. Hou, J. Marsh","doi":"10.1109/UCMMT47867.2019.9008337","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008337","url":null,"abstract":"We present a new design approach for electroabsorption modulators based on integrating a microwave element monolithically with the photonic element. A new method is reported for planarizing and patterning a low-permittivity film using a hydrogen silsesquioxane spin-on coating with electron beam exposure; after 5 coating steps, the layer thickness was 6 μm. We demonstrate the design by fabricating a coplanar waveguide with a 50 Ω characteristic impedance at the input port, at operating frequencies up to 67 GHz.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121734770","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}
引用次数: 1
Highly Overmoded MM-wave Oscillator Experiments 高过模态毫米波振荡器实验
2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) Pub Date : 2019-08-01 DOI: 10.1109/UCMMT47867.2019.9008330
A. Cross, A. MacLachlan, C. Robertson, L. Zhang, K. Ronald, A. Phelps
{"title":"Highly Overmoded MM-wave Oscillator Experiments","authors":"A. Cross, A. MacLachlan, C. Robertson, L. Zhang, K. Ronald, A. Phelps","doi":"10.1109/UCMMT47867.2019.9008330","DOIUrl":"https://doi.org/10.1109/UCMMT47867.2019.9008330","url":null,"abstract":"Overmoded oscillator research has been an active area of interest at the University of Strathclyde for several years. Interaction structures based on complex electrodynamic structures can facilitate higher powers from overmoded mm-wave sources. The gain media used can be vacuum electronic, or condensed matter. The present work reports on the most recent experimental results using a vacuum electronic overmoded source in W-band (75–110 GHz). A two dimensional cylindrical slow wave interaction region is excited by an annular electron beam. Whereas in conventional sources the transverse dimensions of the slow wave structure (SWS) are comparable with the free space wavelength, in these experiments the structure diameter is approximately five free space wavelengths. Recent experimental progress is presented.","PeriodicalId":423474,"journal":{"name":"2019 12th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129787997","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}
引用次数: 1
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