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2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)最新文献

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Input coupling systems for mm-wave amplifiers 毫米波放大器的输入耦合系统
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068472
Liang Zhang, C. Donaldson, J. Garner, A. Cross, Wenlong He
{"title":"Input coupling systems for mm-wave amplifiers","authors":"Liang Zhang, C. Donaldson, J. Garner, A. Cross, Wenlong He","doi":"10.1109/UCMMT.2017.8068472","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068472","url":null,"abstract":"Input couplers for mm-wave gyrotron traveling wave amplifiers (gyro-TWAs) were designed. A W-band input coupler composed of a T-junction and a broadband reflector was constructed and measured in W-band. It achieved a transmission coefficient of −2.2 dB including the pillbox window and a waveguide bend. A multiple-hole coupler was designed and simulated at 372 GHz. Without considering the Ohmic loss, in simulations the 372GHz coupler achieved a transmission coefficient of −0.5 dB.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123943961","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
Smoothly profiled quasi-optical output launcher for a W-band gyro-TWA 用于w波段陀螺- twa的光滑型准光输出发射器
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068473
Liang Zhang, Wenlong He, C. Donaldson, A. Cross, Graham M. Smith, D. Robertson, R. Hunter
{"title":"Smoothly profiled quasi-optical output launcher for a W-band gyro-TWA","authors":"Liang Zhang, Wenlong He, C. Donaldson, A. Cross, Graham M. Smith, D. Robertson, R. Hunter","doi":"10.1109/UCMMT.2017.8068473","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068473","url":null,"abstract":"A W-band quasi-optical horn with smoothly profiled circular inner surface was optimized and measured for a gyrotron traveling wave amplifier. It was designed to achieve low reflection, high fundamental Gaussian mode content and high directivity in the desired frequency range of 90 to 100 GHz. In the measurement, the reflection of the TE11 mode was lower than −37 dB and the directivity was ∼27 dB with side lobes better than −30 dB.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"243 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120876030","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
Demonstration of a high power broadband mm-wave gyro-TWA 高功率宽带毫米波陀螺- twa的演示
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068471
Wenlong He, Liang Zhang, C. Donaldson, A. Cross, A. Phelps
{"title":"Demonstration of a high power broadband mm-wave gyro-TWA","authors":"Wenlong He, Liang Zhang, C. Donaldson, A. Cross, A. Phelps","doi":"10.1109/UCMMT.2017.8068471","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068471","url":null,"abstract":"Design and experimental results of a broadband, high power, millimetre-wave gyrotron traveling wave amplifier (gyro-TWA) operating in the 75–110 GHz frequency band and based on a helically corrugated interaction region (HCIR) and cusp electron beam source are presented. The second harmonic cyclotron mode of the electron beam was used to match the dispersion of an eigenwave in the HCIR, achieving energy transfer from the electrons to waves over a large frequency range. The gyro-TWA was measured to generate a maximum power of a few kWs with an unsaturated gain of 36–38 dB in the driving frequency band of 91–96.5 GHz.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129853781","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
W-band extended interaction oscillations using post-accelerated pseudospark-sourced electron beams 利用后加速伪火花源电子束的w波段扩展相互作用振荡
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068484
A. Cross, H. Yin, W. He, L. Zhang, K. Ronald, A. Phelps, X. Chen, G. Shu, Y. Yin, J. Zhao
{"title":"W-band extended interaction oscillations using post-accelerated pseudospark-sourced electron beams","authors":"A. Cross, H. Yin, W. He, L. Zhang, K. Ronald, A. Phelps, X. Chen, G. Shu, Y. Yin, J. Zhao","doi":"10.1109/UCMMT.2017.8068484","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068484","url":null,"abstract":"This article presents the investigation of a millimetre-wave extended interaction oscillation using both pencil and sheet-shaped pseudospark (PS)-sourced electron beams. Two W-band (75–110 GHz) pencil and sheet beam extended interaction oscillators (EIO) were designed and constructed respectively. The PS-sourced pencil beam EIO structure was firstly driven by a four-gap PS discharge operating at 30.5 kV and the output power of 38 W was achieved. The same EIO structure was then driven by an improved PS-sourced beam produced by combining a single-gap PS structure with an integrated post-acceleration section which generated an output power of 200W. The preliminary PS-sourced sheet beam EIO structure will also be presented.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"26 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113931726","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 wideband low-THz antennas for wireless communications and sensing 用于无线通信和传感的低成本宽带低太赫兹天线
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068470
Chao Gu, S. Gao, B. Sanz-Izquierdo
{"title":"Low-cost wideband low-THz antennas for wireless communications and sensing","authors":"Chao Gu, S. Gao, B. Sanz-Izquierdo","doi":"10.1109/UCMMT.2017.8068470","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068470","url":null,"abstract":"Terahertz technology is expected to provide a significant improvement in wireless system performance. A common assumption is that traditional microwave devices can be scaled down to operate at higher frequency bands. However, it can be a challenge to directly transfer the design methodology from microwave to THz band as the size of the devices becomes a few millimeter large. The reduced antenna size at the THz band limits the suitable fabrication processes. This paper reviews a wide range of THz antennas and their fabrication methodology. Then based on the resonant cavity antenna concept, an all-metal 300 GHz wideband high-gain antenna is designed and simulated. The presented metallic antenna is suitable to be fabricated using 3D printing techniques, which can lead to a low-cost, reliable solution for the emerging THz applications.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"290 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120847549","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: 10
Measurement of 30kW output from a W-band source constructed by additive manufacturing 测量由增材制造构建的w波段源的30kW输出
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068509
A. Phipps, A. MacLachlan, C. Robertson, L. Zhang, A. Cross, A. Phelps
{"title":"Measurement of 30kW output from a W-band source constructed by additive manufacturing","authors":"A. Phipps, A. MacLachlan, C. Robertson, L. Zhang, A. Cross, A. Phelps","doi":"10.1109/UCMMT.2017.8068509","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068509","url":null,"abstract":"Experimental results from the operation of an electron beam driven, mm-wave, vacuum electronic source are reported. The aim of this work is to create improved electron-beam-driven, vacuum electronic mm-wave and sub-THz sources by exploiting dispersion-engineering. Dispersion-engineered structures can be manufactured by several techniques and in this work additive manufacturing has proven to be quick, reliable and cost-effective.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124923257","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
Quality-control of UV offset lithographicaly printed electronic-ink by THz technology 太赫兹技术对UV胶印电子油墨的质量控制
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068504
Yang Zeng, R. Donnan, Marc Edwards, Bin Yang
{"title":"Quality-control of UV offset lithographicaly printed electronic-ink by THz technology","authors":"Yang Zeng, R. Donnan, Marc Edwards, Bin Yang","doi":"10.1109/UCMMT.2017.8068504","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068504","url":null,"abstract":"In this paper, a novel quality-monitor method of inkjet-printed electronics based on terahertz (THz) sensing is presented. Specifically, two different approaches, namely THz reflection spectroscopy and THz near-field scanning, are proposed.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122159650","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
Design of a Ka-band MW-level high efficiency gyroklystron for accelerators ka波段毫瓦级加速器用高效回旋速调管的设计
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068506
Li Wang, K. Dong, Jianxun Wang, Yong Luo, Wenlong He, A. Cross, K. Ronald, A. Phelps
{"title":"Design of a Ka-band MW-level high efficiency gyroklystron for accelerators","authors":"Li Wang, K. Dong, Jianxun Wang, Yong Luo, Wenlong He, A. Cross, K. Ronald, A. Phelps","doi":"10.1109/UCMMT.2017.8068506","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068506","url":null,"abstract":"Design of a three-cavity Ka-band MW-level gyroklystron operated at the fundamental TE02 mode is presented in this paper. The initial design of the magnetron injection gun (MIG) and interaction circuit has been completed by using the PIC (Particle in cell) code MAGIC. The PIC simulation shows this gyroklystron can deliver an output power of more than 1.5 MW with a gain of > 35 dB at 36 GHz. The achieved efficiency exceeds 40 % when driven by a 95 kV, 45 A beam. The optimized MIG has a transverse velocity spread of less than 2.5% when the velocity ratio is around 1.3.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123318502","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: 10
A high-power Schottky diode frequency multiplier chain at 360 GHz for Gyro-TWA applications 用于陀螺- twa应用的360 GHz大功率肖特基二极管倍频链
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-16 DOI: 10.1109/UCMMT.2017.8068513
Hairui Liu, C. Viegas, J. Powell, H. Sanghera, Andrew Whimster, Hui Wang, Wenlong He, C. Donaldson, P. Huggard, B. Alderman
{"title":"A high-power Schottky diode frequency multiplier chain at 360 GHz for Gyro-TWA applications","authors":"Hairui Liu, C. Viegas, J. Powell, H. Sanghera, Andrew Whimster, Hui Wang, Wenlong He, C. Donaldson, P. Huggard, B. Alderman","doi":"10.1109/UCMMT.2017.8068513","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068513","url":null,"abstract":"A high-power Schottky diode frequency multiplier chain at 360 GHz, with a 3 dB bandwidth above 20 GHz is presented. The cascaded frequency doublers show peak efficiencies of 35% and 23% at 180 and 354 GHz, respectively. While the 180 GHz doubler generates a maximum power of 69 mW at 300 mW input, the second stage doubler delivers 12 mW output at 360 GHz. Both doublers consist of low parasitic GaAs Schottky diode circuits optimized to handle high input powers, and neither exhibit saturation at the highest applied power.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125970240","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: 4
Validating terahertz in-line measurement of tablet mixing with discrete element modelling 用离散元模型验证太赫兹片剂混合在线测量
2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT) Pub Date : 2017-10-13 DOI: 10.1109/UCMMT.2017.8068360
Hungyen Lin, C. Pei, D. Markl, Yaochun Shen, J. Elliott, J. Zeitler
{"title":"Validating terahertz in-line measurement of tablet mixing with discrete element modelling","authors":"Hungyen Lin, C. Pei, D. Markl, Yaochun Shen, J. Elliott, J. Zeitler","doi":"10.1109/UCMMT.2017.8068360","DOIUrl":"https://doi.org/10.1109/UCMMT.2017.8068360","url":null,"abstract":"Terahertz in-line sensing was successfully demonstrated for measuring the film coating thickness of individual pharmaceutical tablets during the film coating process. This paper reports our recent progress to further validate the terahertz in-line measurement technique with discrete element modelling for a lab-scale tablet mixing process inside a tablet pan coater.","PeriodicalId":123409,"journal":{"name":"2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)","volume":"1 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128781883","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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